pfm_gen_analysis.cpp

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/*
Name: pfm_analysis.cpp
Author: Daniele Francesco Kruse
E-mail: daniele.francesco.kruse@cern.ch
Version: 0.9 (16/02/2010)

This code is responsible for analysing results generated by the PerfmonService of CMSSW.
It takes 42 files as input (21 simple text files and 21 gzipped text files) and
produces a HTML directory containing the results of the analysis (both counting and sampling).

compile linking zlib: g++ -Wall -lz pfm_analysis.cpp
*/

#include <ctype.h>
#include <cxxabi.h>
#include <fcntl.h>
#include <math.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
#include <zlib.h>

#include <algorithm>
#include <iostream>
#include <list>
#include <map>
#include <sstream>
#include <string>
#include <vector>

#include <dirent.h>
#include <errno.h>

// Core
#define CORE_L2_MISS_CYCLES 200
#define CORE_L2_HIT_CYCLES 14.5
#define CORE_L1_DTLB_MISS_CYCLES 10
#define CORE_LCP_STALL_CYCLES 6
#define CORE_UNKNOWN_ADDR_STORE_CYCLES 5
#define CORE_OVERLAPPING_CYCLES 6
#define CORE_SPAN_ACROSS_CACHE_LINE_CYCLES 20

// Nehalem
#define I7_L1_DTLB_WALK_COMPLETED_CYCLES 35
#define I7_L1_ITLB_WALK_COMPLETED_CYCLES 35
#define I7_L2_HIT_CYCLES 6
#define I7_L3_UNSHARED_HIT_CYCLES 35
#define I7_OTHER_CORE_L2_HIT_CYCLES 60
#define I7_OTHER_CORE_L2_HITM_CYCLES 75
#define I7_L3_MISS_LOCAL_DRAM_HIT_CYCLES 225  // average of 200 (not modified) and 225-250 (modified)
#define I7_L3_MISS_REMOTE_DRAM_HIT_CYCLES 360 // average of 350 (not modified) and 370 (modified)
#define I7_L3_MISS_REMOTE_CACHE_HIT_CYCLES 180
#define I7_IFETCH_L3_MISS_LOCAL_DRAM_HIT 200
#define I7_IFETCH_L3_MISS_REMOTE_DRAM_HIT 350
#define I7_IFETCH_L2_MISS_L3_HIT_NO_SNOOP 35
#define I7_IFETCH_L2_MISS_L3_HIT_SNOOP 60
#define I7_IFETCH_L2_MISS_L3_HITM 75
#define I7_IFETCH_L3_MISS_REMOTE_CACHE_FWD 180

#define MAX_MODULES 1000

#define EXPECTED_CPI 0.25

#define MAX_FILENAME_LENGTH 1024
#define MAX_SAMPLE_INDEX_LENGTH 10000
#define MAX_SYM_LENGTH 15000
#define MAX_SYM_MOD_LENGTH 20000
#define MAX_LIB_LENGTH 5000
#define MAX_LIB_MOD_LENGTH 7000
#define MAX_SIMPLE_SYM_LENGTH 300
#define MAX_SIMPLE_SYM_MOD_LENGTH 500
#define MAX_SIMPLE_LIB_LENGTH 300
#define MAX_SIMPLE_LIB_MOD_LENGTH 500
#define MAX_LINE_LENGTH 20000
#define MAX_EVENT_NAME_LENGTH 150
#define MAX_MODULE_NAME_LENGTH 250
#define MAX_VALUE_STRING_LENGTH 250
#define MAX_ARCH_NAME_LENGTH 20
#define MAX_CMASK_STR_LENGTH 5
#define MAX_INV_STR_LENGTH 5
#define MAX_SP_STR_LENGTH 50

#define PIPE_BUFFER_LENGTH 1000

class PipeReader
{
public:
  PipeReader( const char* cmd )
  {
    pipe = popen( cmd, "r" );
    if ( !pipe ) {
      printf( "Cannot open pipe. Exiting...\n" );
      exit( 1 );
    }
    char buffer[PIPE_BUFFER_LENGTH];
    bzero( buffer, PIPE_BUFFER_LENGTH );
    std::string result = "";
    while ( !feof( pipe ) ) {
      if ( fgets( buffer, PIPE_BUFFER_LENGTH, pipe ) != NULL ) {
        result += buffer;
      }
      bzero( buffer, PIPE_BUFFER_LENGTH );
    }
    iss = new std::istringstream( result, std::istringstream::in );
  }

  ~PipeReader( void )
  {
    pclose( pipe );
    delete iss;
  }

  std::istringstream& output( void ) { return *iss; }

private:
  FILE*               pipe;
  std::istringstream* iss;
};

// skipWhitespaces()
// const char *srcbuffer  : source string
// const char **dstbuffer : destination string
// Skips white spaces
bool skipWhitespaces( const char* srcbuffer, const char** destbuffer )
{
  if ( !isspace( *srcbuffer++ ) ) {
    return false;
  }
  while ( isspace( *srcbuffer ) ) {
    srcbuffer++;
  }
  *destbuffer = srcbuffer;
  return true;
}

// skipString()
// const char *strptr     : substring to skip
// const char *srcbuffer  : source string
// const char **dstbuffer : destination string
// Skips strings of the form '\\s+strptr\\s+' starting from buffer.
// Returns a pointer to the first char which does not match the above regexp,
// or 0 in case the regexp is not matched.
bool skipString( const char* strptr, const char* srcbuffer, const char** dstbuffer )
{
  if ( strncmp( srcbuffer, strptr, strlen( strptr ) ) ) {
    return false;
  }
  *dstbuffer = srcbuffer + strlen( strptr );
  return true;
}

class FileInfo
{
public:
  typedef int Offset;
  std::string NAME;
  FileInfo( void ) : NAME( "<dynamically generated>" ) {}
  FileInfo( const std::string& name, bool useGdb ) : NAME( name )
  {
    if ( useGdb ) {
      this->createOffsetMap();
    }
  }

  const char* symbolByOffset( Offset offset )
  {
    if ( m_symbolCache.empty() ) {
      return 0;
    }

    SymbolCache::iterator i = lower_bound( m_symbolCache.begin(), m_symbolCache.end(), offset, CacheItemComparator() );
    if ( i->OFFSET == offset ) {
      return i->NAME.c_str();
    }

    if ( i == m_symbolCache.begin() ) {
      return m_symbolCache.begin()->NAME.c_str();
    }

    --i;

    return i->NAME.c_str();
  }

  Offset next( Offset offset )
  {
    SymbolCache::iterator i = upper_bound( m_symbolCache.begin(), m_symbolCache.end(), offset, CacheItemComparator() );
    if ( i == m_symbolCache.end() ) {
      return 0;
    }
    return i->OFFSET;
  }

private:
  struct CacheItem {
    CacheItem( Offset offset, const std::string& name ) : OFFSET( offset ), NAME( name ){};
    Offset      OFFSET;
    std::string NAME;
  };

  typedef std::vector<CacheItem> SymbolCache;
  SymbolCache                    m_symbolCache;

  struct CacheItemComparator {
    bool operator()( const CacheItem& a, const int& b ) const { return a.OFFSET < b; }
    bool operator()( const int& a, const CacheItem& b ) const { return a < b.OFFSET; }
  };

  void createOffsetMap( void )
  {
    std::string commandLine = "objdump -p " + NAME;
    PipeReader  objdump( commandLine.c_str() );
    std::string oldname;
    std::string suffix;
    int         vmbase  = 0;
    bool        matched = false;
    while ( objdump.output() ) {
      // Checks the following regexp
      //
      //    LOAD\\s+off\\s+(0x[0-9A-Fa-f]+)\\s+vaddr\\s+(0x[0-9A-Fa-f]+)
      //
      // and sets vmbase to be $2 - $1 of the first matched entry.

      std::string line;
      std::getline( objdump.output(), line );

      if ( !objdump.output() ) break;
      if ( line.empty() ) continue;
      const char* lineptr = line.c_str();
      if ( !skipWhitespaces( lineptr, &lineptr ) ) continue;
      if ( !skipString( "LOAD", lineptr, &lineptr ) ) continue;
      if ( !skipWhitespaces( lineptr, &lineptr ) ) continue;
      if ( !skipString( "off", lineptr, &lineptr ) ) continue;
      char* endptr      = 0;
      int   initialBase = strtol( lineptr, &endptr, 16 );
      if ( lineptr == endptr ) continue;
      lineptr = endptr;
      if ( !skipWhitespaces( lineptr, &lineptr ) ) continue;
      if ( !skipString( "vaddr", lineptr, &lineptr ) ) continue;
      if ( !skipWhitespaces( lineptr, &lineptr ) ) continue;
      int finalBase = strtol( lineptr, &endptr, 16 );
      if ( lineptr == endptr ) continue;
      vmbase  = finalBase - initialBase;
      matched = true;
      break;
    }
    if ( !matched ) {
      fprintf( stderr, "Cannot determine VM base address for %s\n", NAME.c_str() );
      fprintf( stderr, "Error while running `objdump -p %s`\n", NAME.c_str() );
      exit( 1 );
    }
    std::string commandLine2 = "nm -t d -n " + NAME;
    PipeReader  nm( commandLine2.c_str() );
    while ( nm.output() ) {
      std::string line;
      std::getline( nm.output(), line );
      if ( !nm.output() ) break;
      if ( line.empty() ) continue;
      // If line does not match "^(\\d+)[ ]\\S[ ](\S+)$", exit.
      const char* begin   = line.c_str();
      char*       endptr  = 0;
      int         address = strtol( begin, &endptr, 10 );
      if ( endptr == begin ) continue;
      if ( *endptr++ != ' ' ) continue;
      if ( isspace( *endptr++ ) ) continue;
      if ( *endptr++ != ' ' ) continue;
      char* symbolName = endptr;
      while ( *endptr && !isspace( *endptr ) ) endptr++;
      if ( *endptr != 0 ) continue;
      // If line starts with '.' forget about it.
      if ( symbolName[0] == '.' ) continue;
      // Create a new symbol with the given fileoffset.
      // The symbol is automatically saved in the FileInfo cache by offset.
      // If a symbol with the same offset is already there, the new one
      // replaces the old one.
      int offset = address - vmbase;
      if ( m_symbolCache.size() && ( m_symbolCache.back().OFFSET == offset ) )
        m_symbolCache.back().NAME = symbolName;
      else
        m_symbolCache.push_back( CacheItem( address - vmbase, symbolName ) );
    }
  }
};

static std::map<std::string, unsigned int> modules_tot_samples;
static std::map<std::string, FileInfo>     libsInfo;
static int nehalem;

static std::map<std::string, std::map<std::string, double>> C_modules;
static std::vector<std::string> C_events;
static std::vector<std::string> S_events;

static std::vector<std::string> core_caa_events;
static std::vector<std::string> nhm_caa_events;
static std::vector<std::string> core_caa_events_displ;
static std::vector<std::string> nhm_caa_events_displ;

void init_core_caa_events()
{
  core_caa_events.push_back( "BRANCH_INSTRUCTIONS_RETIRED" );
  core_caa_events.push_back( "ILD_STALL" );
  core_caa_events.push_back( "INST_RETIRED:LOADS" );
  core_caa_events.push_back( "INST_RETIRED:OTHER" );
  core_caa_events.push_back( "INST_RETIRED:STORES" );
  core_caa_events.push_back( "INSTRUCTIONS_RETIRED" );
  core_caa_events.push_back( "LOAD_BLOCK:OVERLAP_STORE" );
  core_caa_events.push_back( "LOAD_BLOCK:STA" );
  core_caa_events.push_back( "LOAD_BLOCK:UNTIL_RETIRE" );
  core_caa_events.push_back( "MEM_LOAD_RETIRED:DTLB_MISS" );
  core_caa_events.push_back( "MEM_LOAD_RETIRED:L1D_LINE_MISS" );
  core_caa_events.push_back( "MEM_LOAD_RETIRED:L2_LINE_MISS" );
  core_caa_events.push_back( "MISPREDICTED_BRANCH_RETIRED" );
  // core_caa_events.push_back("RS_UOPS_DISPATCHED");
  // core_caa_events.push_back("RS_UOPS_DISPATCHED CMASK=1");
  core_caa_events.push_back( "RS_UOPS_DISPATCHED CMASK=1 INV=1" );
  core_caa_events.push_back( "SIMD_COMP_INST_RETIRED:PACKED_SINGLE:PACKED_DOUBLE" );
  core_caa_events.push_back( "UNHALTED_CORE_CYCLES" );
  // core_caa_events.push_back("UOPS_RETIRED:ANY");
  // core_caa_events.push_back("UOPS_RETIRED:FUSED");
  // core_caa_events.push_back("IDLE_DURING_DIV");
}

void init_nhm_caa_events()
{
  nhm_caa_events.push_back( "ARITH:CYCLES_DIV_BUSY" );
  nhm_caa_events.push_back( "BR_INST_EXEC:ANY" );
  nhm_caa_events.push_back( "BR_INST_EXEC:DIRECT_NEAR_CALL" );
  nhm_caa_events.push_back( "BR_INST_EXEC:INDIRECT_NEAR_CALL" );
  nhm_caa_events.push_back( "BR_INST_EXEC:INDIRECT_NON_CALL" );
  nhm_caa_events.push_back( "BR_INST_EXEC:NEAR_CALLS" );
  nhm_caa_events.push_back( "BR_INST_EXEC:NON_CALLS" );
  nhm_caa_events.push_back( "BR_INST_EXEC:RETURN_NEAR" );
  nhm_caa_events.push_back( "BR_INST_RETIRED:ALL_BRANCHES" );
  nhm_caa_events.push_back( "BR_INST_RETIRED:CONDITIONAL" );
  nhm_caa_events.push_back( "BR_INST_RETIRED:NEAR_CALL" );
  nhm_caa_events.push_back( "BR_MISP_EXEC:ANY" );
  nhm_caa_events.push_back( "CPU_CLK_UNHALTED:THREAD_P" );
  nhm_caa_events.push_back( "DTLB_LOAD_MISSES:WALK_COMPLETED" );
  nhm_caa_events.push_back( "INST_RETIRED:ANY_P" );
  nhm_caa_events.push_back( "ITLB_MISSES:WALK_COMPLETED" );
  nhm_caa_events.push_back( "L2_RQSTS:IFETCH_HIT" );
  nhm_caa_events.push_back( "L2_RQSTS:IFETCH_MISS" );
  nhm_caa_events.push_back( "MEM_INST_RETIRED:LOADS" );
  nhm_caa_events.push_back( "MEM_INST_RETIRED:STORES" );
  nhm_caa_events.push_back( "MEM_LOAD_RETIRED:L2_HIT" );
  nhm_caa_events.push_back( "MEM_LOAD_RETIRED:L3_MISS" );
  nhm_caa_events.push_back( "MEM_LOAD_RETIRED:L3_UNSHARED_HIT" );
  nhm_caa_events.push_back( "MEM_LOAD_RETIRED:OTHER_CORE_L2_HIT_HITM" );
  nhm_caa_events.push_back( "MEM_UNCORE_RETIRED:LOCAL_DRAM" );
  nhm_caa_events.push_back( "MEM_UNCORE_RETIRED:OTHER_CORE_L2_HITM" );
  nhm_caa_events.push_back( "MEM_UNCORE_RETIRED:REMOTE_CACHE_LOCAL_HOME_HIT" );
  nhm_caa_events.push_back( "MEM_UNCORE_RETIRED:REMOTE_DRAM" );
  nhm_caa_events.push_back( "OFFCORE_RESPONSE_0:DMND_IFETCH:LOCAL_DRAM" );
  nhm_caa_events.push_back( "OFFCORE_RESPONSE_0:DMND_IFETCH:OTHER_CORE_HITM" );
  nhm_caa_events.push_back( "OFFCORE_RESPONSE_0:DMND_IFETCH:OTHER_CORE_HIT_SNP" );
  nhm_caa_events.push_back( "OFFCORE_RESPONSE_0:DMND_IFETCH:REMOTE_CACHE_FWD" );
  nhm_caa_events.push_back( "OFFCORE_RESPONSE_0:DMND_IFETCH:REMOTE_DRAM" );
  nhm_caa_events.push_back( "OFFCORE_RESPONSE_0:DMND_IFETCH:UNCORE_HIT" );
  nhm_caa_events.push_back( "RESOURCE_STALLS:ANY" );
  nhm_caa_events.push_back( "SSEX_UOPS_RETIRED:PACKED_DOUBLE" );
  nhm_caa_events.push_back( "SSEX_UOPS_RETIRED:PACKED_SINGLE" );
  nhm_caa_events.push_back( "UOPS_DECODED:MS CMASK=1" );
  nhm_caa_events.push_back( "UOPS_ISSUED:ANY CMASK=1 INV=1" );
  nhm_caa_events.push_back( "ITLB_MISS_RETIRED" );
  nhm_caa_events.push_back( "UOPS_RETIRED:ANY" );
}

bool check_for_core_caa_events()
{
  for ( std::vector<std::string>::const_iterator it = core_caa_events.begin(); it != core_caa_events.end(); ++it ) {
    if ( find( C_events.begin(), C_events.end(), ( *it ) ) == C_events.end() ) {
      fprintf( stderr, "ERROR: Cannot find event %s!!!\naborting...\n", ( *it ).c_str() );
      return false;
    }
  }
  return true;
}

bool check_for_nhm_caa_events()
{
  for ( std::vector<std::string>::const_iterator it = nhm_caa_events.begin(); it != nhm_caa_events.end(); ++it ) {
    if ( find( C_events.begin(), C_events.end(), ( *it ) ) == C_events.end() ) {
      fprintf( stderr, "ERROR: Cannot find event %s!!!\naborting...\n", ( *it ).c_str() );
      return false;
    }
  }
  return true;
}

void init_core_caa_events_displ()
{
  core_caa_events_displ.push_back( "Total Cycles" );
  core_caa_events_displ.push_back( "Stalled Cycles" );
  core_caa_events_displ.push_back( "% of Total Cycles" );
  core_caa_events_displ.push_back( "Instructions Retired" );
  core_caa_events_displ.push_back( "CPI" );
  core_caa_events_displ.push_back( "" );
  core_caa_events_displ.push_back( "iMargin" );
  core_caa_events_displ.push_back( "iFactor" );
  core_caa_events_displ.push_back( "" );
  core_caa_events_displ.push_back( "Counted Stalled Cycles" );
  core_caa_events_displ.push_back( "" );
  core_caa_events_displ.push_back( "L2 Miss Impact" );
  core_caa_events_displ.push_back( "L2 Miss % of counted Stalled Cycles" );
  core_caa_events_displ.push_back( "" );
  core_caa_events_displ.push_back( "L2 Hit Impact" );
  core_caa_events_displ.push_back( "L2 Hit % of counted Stalled Cycles" );
  core_caa_events_displ.push_back( "" );
  core_caa_events_displ.push_back( "L1 DTLB Miss Impact" );
  core_caa_events_displ.push_back( "L1 DTLB Miss % of counted Stalled Cycles" );
  core_caa_events_displ.push_back( "" );
  core_caa_events_displ.push_back( "LCP Stalls Impact" );
  core_caa_events_displ.push_back( "LCP Stalls % of counted Stalled Cycles" );
  core_caa_events_displ.push_back( "" );
  core_caa_events_displ.push_back( "Store-Fwd Stalls Impact" );
  core_caa_events_displ.push_back( "Store-Fwd Stalls % of counted Stalled Cycles" );
  core_caa_events_displ.push_back( "" );
  core_caa_events_displ.push_back( "Loads Blocked by Unknown Address Store Impact" );
  core_caa_events_displ.push_back( "Loads Blocked % of Store-Fwd Stalls Cycles" );
  core_caa_events_displ.push_back( "Loads Overlapped with Stores Impact" );
  core_caa_events_displ.push_back( "Loads Overlapped % of Store-Fwd Stalls Cycles" );
  core_caa_events_displ.push_back( "Loads Spanning across Cache Lines Impact" );
  core_caa_events_displ.push_back( "Loads Spanning % of Store-Fwd Stalls Cycles" );
  core_caa_events_displ.push_back( "" );
  core_caa_events_displ.push_back( "Load Instructions" );
  core_caa_events_displ.push_back( "Load % of all Instructions" );
  core_caa_events_displ.push_back( "Store Instructions" );
  core_caa_events_displ.push_back( "Store % of all Instructions" );
  core_caa_events_displ.push_back( "Branch Instructions" );
  core_caa_events_displ.push_back( "Branch % of all Instructions" );
  core_caa_events_displ.push_back( "Packed SIMD Computational Instructions" );
  core_caa_events_displ.push_back( "Packed SIMD % of all Instructions" );
  core_caa_events_displ.push_back( "Other Instructions" );
  core_caa_events_displ.push_back( "Other % of all Instructions" );
  core_caa_events_displ.push_back( "" );
  core_caa_events_displ.push_back( "ITLB Miss Rate in %" );
  core_caa_events_displ.push_back( "% of Mispredicted Branches" );
}

void calc_core_deriv_values( double totalCycles )
{
  for ( std::map<std::string, std::map<std::string, double>>::iterator it = C_modules.begin(); it != C_modules.end();
        ++it ) {
    ( it->second )["Total Cycles"]   = ( it->second )["UNHALTED_CORE_CYCLES"];
    ( it->second )["Stalled Cycles"] = ( it->second )["RS_UOPS_DISPATCHED CMASK=1 INV=1"];
    ( it->second )["L2 Miss Impact"] = ( it->second )["MEM_LOAD_RETIRED:L2_LINE_MISS"] * CORE_L2_MISS_CYCLES;
    ( it->second )["L2 Hit Impact"] =
        ( ( it->second )["MEM_LOAD_RETIRED:L1D_LINE_MISS"] - ( it->second )["MEM_LOAD_RETIRED:L2_LINE_MISS"] ) *
        CORE_L2_HIT_CYCLES;
    ( it->second )["L1 DTLB Miss Impact"] = ( it->second )["MEM_LOAD_RETIRED:DTLB_MISS"] * CORE_L1_DTLB_MISS_CYCLES;
    ( it->second )["LCP Stalls Impact"]   = ( it->second )["ILD_STALL"] * CORE_LCP_STALL_CYCLES;
    ( it->second )["Loads Blocked by Unknown Address Store Impact"] =
        ( it->second )["LOAD_BLOCK:STA"] * CORE_UNKNOWN_ADDR_STORE_CYCLES;
    ( it->second )["Loads Overlapped with Stores Impact"] =
        ( it->second )["LOAD_BLOCK:OVERLAP_STORE"] * CORE_OVERLAPPING_CYCLES;
    ( it->second )["Loads Spanning across Cache Lines Impact"] =
        ( it->second )["LOAD_BLOCK:UNTIL_RETIRE"] * CORE_SPAN_ACROSS_CACHE_LINE_CYCLES;
    ( it->second )["Store-Fwd Stalls Impact"] = ( it->second )["Loads Blocked by Unknown Address Store Impact"] +
                                                ( it->second )["Loads Overlapped with Stores Impact"] +
                                                ( it->second )["Loads Spanning across Cache Lines Impact"];
    ( it->second )["Counted Stalled Cycles"] =
        ( it->second )["L2 Miss Impact"] + ( it->second )["L2 Hit Impact"] + ( it->second )["LCP Stalls Impact"] +
        ( it->second )["L1 DTLB Miss Impact"] + ( it->second )["Store-Fwd Stalls Impact"];
    ( it->second )["Instructions Retired"] = ( it->second )["INSTRUCTIONS_RETIRED"];
    ( it->second )["ITLB Miss Rate in %"] =
        ( ( it->second )["ITLB_MISS_RETIRED"] / ( it->second )["INSTRUCTIONS_RETIRED"] ) * 100;
    ( it->second )["Branch Instructions"] = ( it->second )["BRANCH_INSTRUCTIONS_RETIRED"];
    ( it->second )["Load Instructions"]   = ( it->second )["INST_RETIRED:LOADS"];
    ( it->second )["Store Instructions"]  = ( it->second )["INST_RETIRED:STORES"];
    ( it->second )["Other Instructions"]  = ( it->second )["INST_RETIRED:OTHER"] -
                                           ( it->second )["SIMD_COMP_INST_RETIRED:PACKED_SINGLE:PACKED_DOUBLE"] -
                                           ( it->second )["BRANCH_INSTRUCTIONS_RETIRED"];
    ( it->second )["% of Mispredicted Branches"] =
        ( ( it->second )["MISPREDICTED_BRANCH_RETIRED"] / ( it->second )["BRANCH_INSTRUCTIONS_RETIRED"] ) * 100;
    ( it->second )["Packed SIMD Computational Instructions"] =
        ( it->second )["SIMD_COMP_INST_RETIRED:PACKED_SINGLE:PACKED_DOUBLE"];
    ( it->second )["Counted Instructions Retired"] =
        ( it->second )["Branch Instructions"] + ( it->second )["Load Instructions"] +
        ( it->second )["Store Instructions"] + ( it->second )["Other Instructions"] +
        ( it->second )["Packed SIMD Computational Instructions"];
    ( it->second )["CPI"] = ( it->second )["UNHALTED_CORE_CYCLES"] / ( it->second )["INSTRUCTIONS_RETIRED"];

    double localPerformanceImprovement = ( it->second )["CPI"] / EXPECTED_CPI;
    double cyclesAfterImprovement      = ( it->second )["UNHALTED_CORE_CYCLES"] / localPerformanceImprovement;
    double totalCyclesAfterImprovement = totalCycles - ( it->second )["UNHALTED_CORE_CYCLES"] + cyclesAfterImprovement;
    ( it->second )["iMargin"]          = 100 - ( totalCyclesAfterImprovement / totalCycles ) * 100;

    ( it->second )["% of Total Cycles"] =
        ( it->second )["RS_UOPS_DISPATCHED CMASK=1 INV=1"] * 100 / ( it->second )["UNHALTED_CORE_CYCLES"];
    ( it->second )["L2 Miss % of counted Stalled Cycles"] =
        ( it->second )["L2 Miss Impact"] * 100 / ( it->second )["Counted Stalled Cycles"];
    ( it->second )["L2 Hit % of counted Stalled Cycles"] =
        ( it->second )["L2 Hit Impact"] * 100 / ( it->second )["Counted Stalled Cycles"];
    ( it->second )["L1 DTLB Miss % of counted Stalled Cycles"] =
        ( it->second )["L1 DTLB Miss Impact"] * 100 / ( it->second )["Counted Stalled Cycles"];
    ( it->second )["LCP Stalls % of counted Stalled Cycles"] =
        ( it->second )["LCP Stalls Impact"] * 100 / ( it->second )["Counted Stalled Cycles"];
    ( it->second )["Store-Fwd Stalls % of counted Stalled Cycles"] =
        ( it->second )["Store-Fwd Stalls Impact"] * 100 / ( it->second )["Counted Stalled Cycles"];
    ( it->second )["Loads Blocked % of Store-Fwd Stalls Cycles"] =
        ( it->second )["Loads Blocked by Unknown Address Store Impact"] * 100 /
        ( it->second )["Store-Fwd Stalls Impact"];
    ( it->second )["Loads Overlapped % of Store-Fwd Stalls Cycles"] =
        ( it->second )["Loads Overlapped with Stores Impact"] * 100 / ( it->second )["Store-Fwd Stalls Impact"];
    ( it->second )["Loads Spanning % of Store-Fwd Stalls Cycles"] =
        ( it->second )["Loads Spanning across Cache Lines Impact"] * 100 / ( it->second )["Store-Fwd Stalls Impact"];

    ( it->second )["Load % of all Instructions"] =
        ( it->second )["INST_RETIRED:LOADS"] * 100 / ( it->second )["Counted Instructions Retired"];
    ( it->second )["Store % of all Instructions"] =
        ( it->second )["INST_RETIRED:STORES"] * 100 / ( it->second )["Counted Instructions Retired"];
    ( it->second )["Branch % of all Instructions"] =
        ( it->second )["BRANCH_INSTRUCTIONS_RETIRED"] * 100 / ( it->second )["Counted Instructions Retired"];
    ( it->second )["Packed SIMD % of all Instructions"] =
        ( it->second )["SIMD_COMP_INST_RETIRED:PACKED_SINGLE:PACKED_DOUBLE"] * 100 /
        ( it->second )["Counted Instructions Retired"];
    ( it->second )["Other % of all Instructions"] =
        ( it->second )["Other Instructions"] * 100 / ( it->second )["Counted Instructions Retired"];
  }
}

void init_nhm_caa_events_displ()
{
  nhm_caa_events_displ.push_back( "Total Cycles" );
  nhm_caa_events_displ.push_back( "Instructions Retired" );
  nhm_caa_events_displ.push_back( "CPI" );
  nhm_caa_events_displ.push_back( "" );
  nhm_caa_events_displ.push_back( "iMargin" );
  nhm_caa_events_displ.push_back( "iFactor" );
  nhm_caa_events_displ.push_back( "" );
  nhm_caa_events_displ.push_back( "Stalled Cycles" );
  nhm_caa_events_displ.push_back( "% of Total Cycles" );
  nhm_caa_events_displ.push_back( "Total Counted Stalled Cycles" );
  nhm_caa_events_displ.push_back( "" );
  nhm_caa_events_displ.push_back( "Instruction Starvation % of Total Cycles" );
  nhm_caa_events_displ.push_back( "# of Instructions per Call" );
  nhm_caa_events_displ.push_back( "% of Total Cycles spent handling FP exceptions" );
  nhm_caa_events_displ.push_back( "" );
  nhm_caa_events_displ.push_back( "Counted Stalled Cycles due to Load Ops" );
  nhm_caa_events_displ.push_back( "" );
  nhm_caa_events_displ.push_back( "L2 Hit Impact" );
  nhm_caa_events_displ.push_back( "L2 Hit % of Load Stalls" );
  nhm_caa_events_displ.push_back( "" );
  nhm_caa_events_displ.push_back( "L3 Unshared Hit Impact" );
  nhm_caa_events_displ.push_back( "L3 Unshared Hit % of Load Stalls" );
  nhm_caa_events_displ.push_back( "" );
  nhm_caa_events_displ.push_back( "L2 Other Core Hit Impact" );
  nhm_caa_events_displ.push_back( "L2 Other Core Hit % of Load Stalls" );
  nhm_caa_events_displ.push_back( "" );
  nhm_caa_events_displ.push_back( "L2 Other Core Hit Modified Impact" );
  nhm_caa_events_displ.push_back( "L2 Other Core Hit Modified % of Load Stalls" );
  nhm_caa_events_displ.push_back( "" );
  nhm_caa_events_displ.push_back( "L3 Miss -> Local DRAM Hit Impact" );
  nhm_caa_events_displ.push_back( "L3 Miss -> Remote DRAM Hit Impact" );
  nhm_caa_events_displ.push_back( "L3 Miss -> Remote Cache Hit Impact" );
  nhm_caa_events_displ.push_back( "L3 Miss -> Total Impact" );
  nhm_caa_events_displ.push_back( "L3 Miss % of Load Stalls" );
  nhm_caa_events_displ.push_back( "" );
  nhm_caa_events_displ.push_back( "L1 DTLB Miss Impact" );
  nhm_caa_events_displ.push_back( "L1 DTLB Miss % of Load Stalls" );
  nhm_caa_events_displ.push_back( "" );
  nhm_caa_events_displ.push_back( "Cycles spent during DIV & SQRT Ops" );
  nhm_caa_events_displ.push_back( "DIV & SQRT Ops % of counted Stalled Cycles" );
  nhm_caa_events_displ.push_back( "" );
  nhm_caa_events_displ.push_back( "Total L2 IFETCH misses" );
  nhm_caa_events_displ.push_back( "% of L2 IFETCH misses" );
  nhm_caa_events_displ.push_back( "" );
  nhm_caa_events_displ.push_back( "% of IFETCHes served by Local DRAM" );
  nhm_caa_events_displ.push_back( "% of IFETCHes served by L3 (Modified)" );
  nhm_caa_events_displ.push_back( "% of IFETCHes served by L3 (Clean Snoop)" );
  nhm_caa_events_displ.push_back( "% of IFETCHes served by Remote L2" );
  nhm_caa_events_displ.push_back( "% of IFETCHes served by Remote DRAM" );
  nhm_caa_events_displ.push_back( "% of IFETCHes served by L3 (No Snoop)" );
  nhm_caa_events_displ.push_back( "" );
  nhm_caa_events_displ.push_back( "Total L2 IFETCH miss Impact" );
  nhm_caa_events_displ.push_back( "" );
  nhm_caa_events_displ.push_back( "Cycles IFETCH served by Local DRAM" );
  nhm_caa_events_displ.push_back( "Local DRAM IFECTHes % Impact" );
  nhm_caa_events_displ.push_back( "" );
  nhm_caa_events_displ.push_back( "Cycles IFETCH served by L3 (Modified)" );
  nhm_caa_events_displ.push_back( "L3 (Modified) IFECTHes % Impact" );
  nhm_caa_events_displ.push_back( "" );
  nhm_caa_events_displ.push_back( "Cycles IFETCH served by L3 (Clean Snoop)" );
  nhm_caa_events_displ.push_back( "L3 (Clean Snoop) IFECTHes % Impact" );
  nhm_caa_events_displ.push_back( "" );
  nhm_caa_events_displ.push_back( "Cycles IFETCH served by Remote L2" );
  nhm_caa_events_displ.push_back( "Remote L2 IFECTHes % Impact" );
  nhm_caa_events_displ.push_back( "" );
  nhm_caa_events_displ.push_back( "Cycles IFETCH served by Remote DRAM" );
  nhm_caa_events_displ.push_back( "Remote DRAM IFECTHes % Impact" );
  nhm_caa_events_displ.push_back( "" );
  nhm_caa_events_displ.push_back( "Cycles IFETCH served by L3 (No Snoop)" );
  nhm_caa_events_displ.push_back( "L3 (No Snoop) IFECTHes % Impact" );
  nhm_caa_events_displ.push_back( "" );
  nhm_caa_events_displ.push_back( "Total Branch Instructions Executed" );
  nhm_caa_events_displ.push_back( "% of Mispredicted Branches" );
  nhm_caa_events_displ.push_back( "" );
  nhm_caa_events_displ.push_back( "Direct Near Calls % of Total Branches Executed" );
  nhm_caa_events_displ.push_back( "Indirect Near Calls % of Total Branches Executed" );
  nhm_caa_events_displ.push_back( "Indirect Near Non-Calls % of Total Branches Executed" );
  nhm_caa_events_displ.push_back( "All Near Calls % of Total Branches Executed" );
  nhm_caa_events_displ.push_back( "All Non Calls % of Total Branches Executed" );
  nhm_caa_events_displ.push_back( "All Returns % of Total Branches Executed" );
  nhm_caa_events_displ.push_back( "" );
  nhm_caa_events_displ.push_back( "Total Branch Instructions Retired" );
  nhm_caa_events_displ.push_back( "Conditionals % of Total Branches Retired" );
  nhm_caa_events_displ.push_back( "Near Calls % of Total Branches Retired" );
  nhm_caa_events_displ.push_back( "" );
  nhm_caa_events_displ.push_back( "L1 ITLB Miss Impact" );
  nhm_caa_events_displ.push_back( "ITLB Miss Rate in %" );
  nhm_caa_events_displ.push_back( "" );
  nhm_caa_events_displ.push_back( "Branch Instructions" );
  nhm_caa_events_displ.push_back( "Branch % of all Instructions" );
  nhm_caa_events_displ.push_back( "" );
  nhm_caa_events_displ.push_back( "Load Instructions" );
  nhm_caa_events_displ.push_back( "Load % of all Instructions" );
  nhm_caa_events_displ.push_back( "" );
  nhm_caa_events_displ.push_back( "Store Instructions" );
  nhm_caa_events_displ.push_back( "Store % of all Instructions" );
  nhm_caa_events_displ.push_back( "" );
  nhm_caa_events_displ.push_back( "Other Instructions" );
  nhm_caa_events_displ.push_back( "Other % of all Instructions" );
  nhm_caa_events_displ.push_back( "" );
  nhm_caa_events_displ.push_back( "Packed UOPS Retired" );
  nhm_caa_events_displ.push_back( "Packed % of all UOPS Retired" );
}

void calc_nhm_deriv_values( double totalCycles )
{
  for ( std::map<std::string, std::map<std::string, double>>::iterator it = C_modules.begin(); it != C_modules.end();
        ++it ) {
    ( it->second )["Total Cycles"] = ( it->second )["CPU_CLK_UNHALTED:THREAD_P"];

    ( it->second )["L2 Hit Impact"] = ( it->second )["MEM_LOAD_RETIRED:L2_HIT"] * I7_L2_HIT_CYCLES;
    ( it->second )["L3 Unshared Hit Impact"] =
        ( it->second )["MEM_LOAD_RETIRED:L3_UNSHARED_HIT"] * I7_L3_UNSHARED_HIT_CYCLES;
    if ( ( it->second )["MEM_LOAD_RETIRED:OTHER_CORE_L2_HIT_HITM"] >
         ( it->second )["MEM_UNCORE_RETIRED:OTHER_CORE_L2_HITM"] ) {
      ( it->second )["L2 Other Core Hit Impact"] = ( ( it->second )["MEM_LOAD_RETIRED:OTHER_CORE_L2_HIT_HITM"] -
                                                     ( it->second )["MEM_UNCORE_RETIRED:OTHER_CORE_L2_HITM"] ) *
                                                   I7_OTHER_CORE_L2_HIT_CYCLES;
    } else {
      ( it->second )["L2 Other Core Hit Impact"] = 0.0;
    }
    ( it->second )["L2 Other Core Hit Modified Impact"] =
        ( it->second )["MEM_UNCORE_RETIRED:OTHER_CORE_L2_HITM"] * I7_OTHER_CORE_L2_HITM_CYCLES;
    ( it->second )["L3 Miss -> Local DRAM Hit Impact"] =
        ( it->second )["MEM_UNCORE_RETIRED:LOCAL_DRAM"] * I7_L3_MISS_LOCAL_DRAM_HIT_CYCLES;
    ( it->second )["L3 Miss -> Remote DRAM Hit Impact"] =
        ( it->second )["MEM_UNCORE_RETIRED:REMOTE_DRAM"] * I7_L3_MISS_REMOTE_DRAM_HIT_CYCLES;
    ( it->second )["L3 Miss -> Remote Cache Hit Impact"] =
        ( it->second )["MEM_UNCORE_RETIRED:REMOTE_CACHE_LOCAL_HOME_HIT"] * I7_L3_MISS_REMOTE_CACHE_HIT_CYCLES;
    ( it->second )["L3 Miss -> Total Impact"] = ( it->second )["L3 Miss -> Local DRAM Hit Impact"] +
                                                ( it->second )["L3 Miss -> Remote DRAM Hit Impact"] +
                                                ( it->second )["L3 Miss -> Remote Cache Hit Impact"];
    ( it->second )["L1 DTLB Miss Impact"] =
        ( it->second )["DTLB_LOAD_MISSES:WALK_COMPLETED"] * I7_L1_DTLB_WALK_COMPLETED_CYCLES;
    ( it->second )["Counted Stalled Cycles due to Load Ops"] =
        ( it->second )["L3 Miss -> Total Impact"] + ( it->second )["L2 Hit Impact"] +
        ( it->second )["L1 DTLB Miss Impact"] + ( it->second )["L3 Unshared Hit Impact"] +
        ( it->second )["L2 Other Core Hit Modified Impact"] + ( it->second )["L2 Other Core Hit Impact"];
    ( it->second )["Cycles spent during DIV & SQRT Ops"] = ( it->second )["ARITH:CYCLES_DIV_BUSY"];
    ( it->second )["Total Counted Stalled Cycles"] =
        ( it->second )["Counted Stalled Cycles due to Load Ops"] + ( it->second )["Cycles spent during DIV & SQRT Ops"];
    ( it->second )["Stalled Cycles"] =
        ( it->second )["Total Counted Stalled Cycles"]; // TO BE FIXED when UOPS_EXECUTED:0x3f is fixed!!
    ( it->second )["% of Total Cycles"] =
        ( it->second )["Stalled Cycles"] * 100 / ( it->second )["CPU_CLK_UNHALTED:THREAD_P"]; // TO BE FIXED!! see above
    ( it->second )["L3 Miss % of Load Stalls"] =
        ( it->second )["L3 Miss -> Total Impact"] * 100 / ( it->second )["Counted Stalled Cycles due to Load Ops"];
    ( it->second )["L2 Hit % of Load Stalls"] =
        ( it->second )["L2 Hit Impact"] * 100 / ( it->second )["Counted Stalled Cycles due to Load Ops"];
    ( it->second )["L1 DTLB Miss % of Load Stalls"] =
        ( it->second )["L1 DTLB Miss Impact"] * 100 / ( it->second )["Counted Stalled Cycles due to Load Ops"];
    ( it->second )["L3 Unshared Hit % of Load Stalls"] =
        ( it->second )["L3 Unshared Hit Impact"] * 100 / ( it->second )["Counted Stalled Cycles due to Load Ops"];
    ( it->second )["L2 Other Core Hit % of Load Stalls"] =
        ( it->second )["L2 Other Core Hit Impact"] * 100 / ( it->second )["Counted Stalled Cycles due to Load Ops"];
    ( it->second )["L2 Other Core Hit Modified % of Load Stalls"] =
        ( it->second )["L2 Other Core Hit Modified Impact"] * 100 /
        ( it->second )["Counted Stalled Cycles due to Load Ops"];
    ( it->second )["DIV & SQRT Ops % of counted Stalled Cycles"] =
        ( it->second )["Cycles spent during DIV & SQRT Ops"] * 100 / ( it->second )["Total Counted Stalled Cycles"];

    ( it->second )["Cycles IFETCH served by Local DRAM"] =
        ( it->second )["OFFCORE_RESPONSE_0:DMND_IFETCH:LOCAL_DRAM"] * I7_IFETCH_L3_MISS_LOCAL_DRAM_HIT;
    ( it->second )["Cycles IFETCH served by L3 (Modified)"] =
        ( it->second )["OFFCORE_RESPONSE_0:DMND_IFETCH:OTHER_CORE_HITM"] * I7_IFETCH_L2_MISS_L3_HITM;
    ( it->second )["Cycles IFETCH served by L3 (Clean Snoop)"] =
        ( it->second )["OFFCORE_RESPONSE_0:DMND_IFETCH:OTHER_CORE_HIT_SNP"] * I7_IFETCH_L2_MISS_L3_HIT_SNOOP;
    ( it->second )["Cycles IFETCH served by Remote L2"] =
        ( it->second )["OFFCORE_RESPONSE_0:DMND_IFETCH:REMOTE_CACHE_FWD"] * I7_IFETCH_L3_MISS_REMOTE_CACHE_FWD;
    ( it->second )["Cycles IFETCH served by Remote DRAM"] =
        ( it->second )["OFFCORE_RESPONSE_0:DMND_IFETCH:REMOTE_DRAM"] * I7_IFETCH_L3_MISS_REMOTE_DRAM_HIT;
    ( it->second )["Cycles IFETCH served by L3 (No Snoop)"] =
        ( it->second )["OFFCORE_RESPONSE_0:DMND_IFETCH:UNCORE_HIT"] * I7_IFETCH_L2_MISS_L3_HIT_NO_SNOOP;
    ( it->second )["Total L2 IFETCH miss Impact"] =
        ( it->second )["Cycles IFETCH served by Local DRAM"] + ( it->second )["Cycles IFETCH served by L3 (Modified)"] +
        ( it->second )["Cycles IFETCH served by L3 (Clean Snoop)"] +
        ( it->second )["Cycles IFETCH served by Remote L2"] + ( it->second )["Cycles IFETCH served by Remote DRAM"] +
        ( it->second )["Cycles IFETCH served by L3 (No Snoop)"];
    ( it->second )["Local DRAM IFECTHes % Impact"] =
        ( it->second )["Cycles IFETCH served by Local DRAM"] * 100 / ( it->second )["Total L2 IFETCH miss Impact"];
    ( it->second )["L3 (Modified) IFECTHes % Impact"] =
        ( it->second )["Cycles IFETCH served by L3 (Modified)"] * 100 / ( it->second )["Total L2 IFETCH miss Impact"];
    ( it->second )["L3 (Clean Snoop) IFECTHes % Impact"] = ( it->second )["Cycles IFETCH served by L3 (Clean Snoop)"] *
                                                           100 / ( it->second )["Total L2 IFETCH miss Impact"];
    ( it->second )["Remote L2 IFECTHes % Impact"] =
        ( it->second )["Cycles IFETCH served by Remote L2"] * 100 / ( it->second )["Total L2 IFETCH miss Impact"];
    ( it->second )["Remote DRAM IFECTHes % Impact"] =
        ( it->second )["Cycles IFETCH served by Remote DRAM"] * 100 / ( it->second )["Total L2 IFETCH miss Impact"];
    ( it->second )["L3 (No Snoop) IFECTHes % Impact"] =
        ( it->second )["Cycles IFETCH served by L3 (No Snoop)"] * 100 / ( it->second )["Total L2 IFETCH miss Impact"];
    ( it->second )["Total L2 IFETCH misses"] = ( it->second )["L2_RQSTS:IFETCH_MISS"];
    ( it->second )["% of IFETCHes served by Local DRAM"] =
        ( it->second )["OFFCORE_RESPONSE_0:DMND_IFETCH:LOCAL_DRAM"] * 100 / ( it->second )["L2_RQSTS:IFETCH_MISS"];
    ( it->second )["% of IFETCHes served by L3 (Modified)"] =
        ( it->second )["OFFCORE_RESPONSE_0:DMND_IFETCH:OTHER_CORE_HITM"] * 100 / ( it->second )["L2_RQSTS:IFETCH_MISS"];
    ( it->second )["% of IFETCHes served by L3 (Clean Snoop)"] =
        ( it->second )["OFFCORE_RESPONSE_0:DMND_IFETCH:OTHER_CORE_HIT_SNP"] * 100 /
        ( it->second )["L2_RQSTS:IFETCH_MISS"];
    ( it->second )["% of IFETCHes served by Remote L2"] =
        ( it->second )["OFFCORE_RESPONSE_0:DMND_IFETCH:REMOTE_CACHE_FWD"] * 100 /
        ( it->second )["L2_RQSTS:IFETCH_MISS"];
    ( it->second )["% of IFETCHes served by Remote DRAM"] =
        ( it->second )["OFFCORE_RESPONSE_0:DMND_IFETCH:REMOTE_DRAM"] * 100 / ( it->second )["L2_RQSTS:IFETCH_MISS"];
    ( it->second )["% of IFETCHes served by L3 (No Snoop)"] =
        ( it->second )["OFFCORE_RESPONSE_0:DMND_IFETCH:UNCORE_HIT"] * 100 / ( it->second )["L2_RQSTS:IFETCH_MISS"];
    ( it->second )["% of L2 IFETCH misses"] =
        ( it->second )["L2_RQSTS:IFETCH_MISS"] * 100 /
        ( ( it->second )["L2_RQSTS:IFETCH_MISS"] + ( it->second )["L2_RQSTS:IFETCH_HIT"] );
    ( it->second )["L1 ITLB Miss Impact"] =
        ( it->second )["ITLB_MISSES:WALK_COMPLETED"] * I7_L1_ITLB_WALK_COMPLETED_CYCLES;

    ( it->second )["Total Branch Instructions Executed"] = ( it->second )["BR_INST_EXEC:ANY"];
    ( it->second )["% of Mispredicted Branches"] =
        ( it->second )["BR_MISP_EXEC:ANY"] * 100 / ( it->second )["BR_INST_EXEC:ANY"];
    ( it->second )["Direct Near Calls % of Total Branches Executed"] =
        ( it->second )["BR_INST_EXEC:DIRECT_NEAR_CALL"] * 100 / ( it->second )["Total Branch Instructions Executed"];
    ( it->second )["Indirect Near Calls % of Total Branches Executed"] =
        ( it->second )["BR_INST_EXEC:INDIRECT_NEAR_CALL"] * 100 / ( it->second )["Total Branch Instructions Executed"];
    ( it->second )["Indirect Near Non-Calls % of Total Branches Executed"] =
        ( it->second )["BR_INST_EXEC:INDIRECT_NON_CALL"] * 100 / ( it->second )["Total Branch Instructions Executed"];
    ( it->second )["All Near Calls % of Total Branches Executed"] =
        ( it->second )["BR_INST_EXEC:NEAR_CALLS"] * 100 / ( it->second )["Total Branch Instructions Executed"];
    ( it->second )["All Non Calls % of Total Branches Executed"] =
        ( it->second )["BR_INST_EXEC:NON_CALLS"] * 100 / ( it->second )["Total Branch Instructions Executed"];
    ( it->second )["All Returns % of Total Branches Executed"] =
        ( it->second )["BR_INST_EXEC:RETURN_NEAR"] * 100 / ( it->second )["Total Branch Instructions Executed"];
    ( it->second )["Total Branch Instructions Retired"] = ( it->second )["BR_INST_RETIRED:ALL_BRANCHES"];
    ( it->second )["Conditionals % of Total Branches Retired"] =
        ( it->second )["BR_INST_RETIRED:CONDITIONAL"] * 100 / ( it->second )["Total Branch Instructions Retired"];
    ( it->second )["Near Calls % of Total Branches Retired"] =
        ( it->second )["BR_INST_RETIRED:NEAR_CALL"] * 100 / ( it->second )["Total Branch Instructions Retired"];

    ( it->second )["Instruction Starvation % of Total Cycles"] =
        ( ( it->second )["UOPS_ISSUED:ANY CMASK=1 INV=1"] - ( it->second )["RESOURCE_STALLS:ANY"] ) * 100 /
        ( it->second )["CPU_CLK_UNHALTED:THREAD_P"];
    ( it->second )["% of Total Cycles spent handling FP exceptions"] =
        ( it->second )["UOPS_DECODED:MS CMASK=1"] * 100 / ( it->second )["CPU_CLK_UNHALTED:THREAD_P"];
    ( it->second )["# of Instructions per Call"] =
        ( it->second )["INST_RETIRED:ANY_P"] / ( it->second )["BR_INST_EXEC:NEAR_CALLS"];

    ( it->second )["Instructions Retired"] = ( it->second )["INST_RETIRED:ANY_P"];
    ( it->second )["ITLB Miss Rate in %"] =
        ( ( it->second )["ITLB_MISS_RETIRED"] / ( it->second )["INST_RETIRED:ANY_P"] ) * 100;

    ( it->second )["Branch Instructions"] = ( it->second )["BR_INST_RETIRED:ALL_BRANCHES"];
    ( it->second )["Load Instructions"]   = ( it->second )["MEM_INST_RETIRED:LOADS"];
    ( it->second )["Store Instructions"]  = ( it->second )["MEM_INST_RETIRED:STORES"];
    ( it->second )["Other Instructions"] =
        ( it->second )["Instructions Retired"] - ( it->second )["MEM_INST_RETIRED:LOADS"] -
        ( it->second )["MEM_INST_RETIRED:STORES"] - ( it->second )["BR_INST_RETIRED:ALL_BRANCHES"];
    ( it->second )["Packed UOPS Retired"] =
        ( it->second )["SSEX_UOPS_RETIRED:PACKED_DOUBLE"] + ( it->second )["SSEX_UOPS_RETIRED:PACKED_SINGLE"];
    ( it->second )["CPI"] = ( it->second )["CPU_CLK_UNHALTED:THREAD_P"] / ( it->second )["INST_RETIRED:ANY_P"];

    double localPerformanceImprovement = ( it->second )["CPI"] / EXPECTED_CPI;
    double cyclesAfterImprovement      = ( it->second )["CPU_CLK_UNHALTED:THREAD_P"] / localPerformanceImprovement;
    double totalCyclesAfterImprovement =
        totalCycles - ( it->second )["CPU_CLK_UNHALTED:THREAD_P"] + cyclesAfterImprovement;
    ( it->second )["iMargin"] = 100 - ( totalCyclesAfterImprovement / totalCycles ) * 100;

    ( it->second )["Load % of all Instructions"] =
        ( it->second )["MEM_INST_RETIRED:LOADS"] * 100 / ( it->second )["INST_RETIRED:ANY_P"];
    ( it->second )["Store % of all Instructions"] =
        ( it->second )["MEM_INST_RETIRED:STORES"] * 100 / ( it->second )["INST_RETIRED:ANY_P"];
    ( it->second )["Branch % of all Instructions"] =
        ( it->second )["BR_INST_RETIRED:ALL_BRANCHES"] * 100 / ( it->second )["INST_RETIRED:ANY_P"];
    ( it->second )["Other % of all Instructions"] =
        ( it->second )["Other Instructions"] * 100 / ( it->second )["INST_RETIRED:ANY_P"];

    ( it->second )["Packed % of all UOPS Retired"] =
        ( it->second )["Packed UOPS Retired"] * 100 / ( it->second )["UOPS_RETIRED:ANY"];
  }
}

// S_module class defining the objects containing sampling results for each module
class S_module
{
private:
  std::map<std::string, unsigned int> samples;
  unsigned int total_num_samples;
  std::string  module_name;
  std::string  arch;
  std::string  event;
  unsigned int cmask;
  unsigned int inv;
  unsigned int sp;

public:
  S_module() { clear(); }
  void clear()
  {
    samples.clear();
    total_num_samples = 0;
    sp                = 0;
    module_name       = "";
    cmask             = 0;
    inv               = 0;
    sp                = 0;
  }
  void init( const char* name, const char* architecture, const char* event_name, unsigned int c_mask,
             unsigned int inv_mask, unsigned int smpl_period )
  {
    module_name = name;
    arch        = architecture;
    event       = event_name;
    cmask       = c_mask;
    inv         = inv_mask;
    sp          = smpl_period;
  }
  void set_total( unsigned int total )
  {
    total_num_samples = total;
    return;
  }
  unsigned int get_smpl_period() { return sp; }
  unsigned int get_inv_mask() { return inv; }
  unsigned int get_c_mask() { return cmask; }
  std::string  get_arch() { return arch; }
  std::string  get_event() { return event; }
  void add_sample( const char* index, unsigned int value )
  {
    samples[index] += value;
    return;
  }
  bool get_max( char* index, unsigned int* value )
  {
    if ( samples.empty() ) return false;
    unsigned int cur_max = 0;
    std::map<std::string, unsigned int>::iterator max_pos;
    for ( std::map<std::string, unsigned int>::iterator it = samples.begin(); it != samples.end(); ++it ) {
      if ( it->second > cur_max ) {
        cur_max = it->second;
        max_pos = it;
      }
    }
    strcpy( index, ( max_pos->first ).c_str() );
    *value = max_pos->second;
    samples.erase( max_pos );
    return true;
  }
  std::string  get_module_name() { return module_name; }
  unsigned int get_total_num_samples() { return total_num_samples; }
};

// void html_special_chars()
// const char *s : source string
// char *s_mod   : destination string
// replaces special HTML characters with correctly escaped sequences to be used inside HTML code
void html_special_chars( const char* s, char* s_mod )
{
  int n  = strlen( s );
  *s_mod = '\0';
  for ( int i = 0; i < n; i++ ) {
    switch ( s[i] ) {
    case '<':
      strcat( s_mod, "&lt;" );
      break;
    case '>':
      strcat( s_mod, "&gt;" );
      break;
    case '&':
      strcat( s_mod, "&amp;" );
      break;
    case '"':
      strcat( s_mod, "&quot;" );
      break;
    default:
      char to_app[2];
      to_app[0] = s[i];
      to_app[1] = '\0';
      strcat( s_mod, to_app );
      break;
    }
  }
  return;
}

// func_name()
// const char *demangled_symbol : string corresponding to the demangled symbol found by the read_file() function
// parses the argument and returns just the function name without arguments or return types
const char* func_name( const char* demangled_symbol )
{
  char* operator_string_begin = const_cast<char*>( strstr( demangled_symbol, "operator" ) );
  if ( operator_string_begin != NULL ) {
    char* operator_string_end = operator_string_begin + 8;
    while ( *operator_string_end == ' ' ) operator_string_end++;
    if ( strstr( operator_string_end, "delete[]" ) == operator_string_end ) {
      operator_string_end += 8;
      *operator_string_end = '\0';
    } else if ( strstr( operator_string_end, "delete" ) == operator_string_end ) {
      operator_string_end += 6;
      *operator_string_end = '\0';
    } else if ( strstr( operator_string_end, "new[]" ) == operator_string_end ) {
      operator_string_end += 5;
      *operator_string_end = '\0';
    } else if ( strstr( operator_string_end, "new" ) == operator_string_end ) {
      operator_string_end += 3;
      *operator_string_end = '\0';
    } else if ( strstr( operator_string_end, ">>=" ) == operator_string_end ) {
      operator_string_end += 3;
      *operator_string_end = '\0';
    } else if ( strstr( operator_string_end, "<<=" ) == operator_string_end ) {
      operator_string_end += 3;
      *operator_string_end = '\0';
    } else if ( strstr( operator_string_end, "->*" ) == operator_string_end ) {
      operator_string_end += 3;
      *operator_string_end = '\0';
    } else if ( strstr( operator_string_end, "<<" ) == operator_string_end ) {
      operator_string_end += 2;
      *operator_string_end = '\0';
    } else if ( strstr( operator_string_end, ">>" ) == operator_string_end ) {
      operator_string_end += 2;
      *operator_string_end = '\0';
    } else if ( strstr( operator_string_end, ">=" ) == operator_string_end ) {
      operator_string_end += 2;
      *operator_string_end = '\0';
    } else if ( strstr( operator_string_end, "<=" ) == operator_string_end ) {
      operator_string_end += 2;
      *operator_string_end = '\0';
    } else if ( strstr( operator_string_end, "==" ) == operator_string_end ) {
      operator_string_end += 2;
      *operator_string_end = '\0';
    } else if ( strstr( operator_string_end, "!=" ) == operator_string_end ) {
      operator_string_end += 2;
      *operator_string_end = '\0';
    } else if ( strstr( operator_string_end, "|=" ) == operator_string_end ) {
      operator_string_end += 2;
      *operator_string_end = '\0';
    } else if ( strstr( operator_string_end, "&=" ) == operator_string_end ) {
      operator_string_end += 2;
      *operator_string_end = '\0';
    } else if ( strstr( operator_string_end, "^=" ) == operator_string_end ) {
      operator_string_end += 2;
      *operator_string_end = '\0';
    } else if ( strstr( operator_string_end, "%=" ) == operator_string_end ) {
      operator_string_end += 2;
      *operator_string_end = '\0';
    } else if ( strstr( operator_string_end, "/=" ) == operator_string_end ) {
      operator_string_end += 2;
      *operator_string_end = '\0';
    } else if ( strstr( operator_string_end, "*=" ) == operator_string_end ) {
      operator_string_end += 2;
      *operator_string_end = '\0';
    } else if ( strstr( operator_string_end, "-=" ) == operator_string_end ) {
      operator_string_end += 2;
      *operator_string_end = '\0';
    } else if ( strstr( operator_string_end, "+=" ) == operator_string_end ) {
      operator_string_end += 2;
      *operator_string_end = '\0';
    } else if ( strstr( operator_string_end, "&&" ) == operator_string_end ) {
      operator_string_end += 2;
      *operator_string_end = '\0';
    } else if ( strstr( operator_string_end, "||" ) == operator_string_end ) {
      operator_string_end += 2;
      *operator_string_end = '\0';
    } else if ( strstr( operator_string_end, "[]" ) == operator_string_end ) {
      operator_string_end += 2;
      *operator_string_end = '\0';
    } else if ( strstr( operator_string_end, "()" ) == operator_string_end ) {
      operator_string_end += 2;
      *operator_string_end = '\0';
    } else if ( strstr( operator_string_end, "++" ) == operator_string_end ) {
      operator_string_end += 2;
      *operator_string_end = '\0';
    } else if ( strstr( operator_string_end, "--" ) == operator_string_end ) {
      operator_string_end += 2;
      *operator_string_end = '\0';
    } else if ( strstr( operator_string_end, "->" ) == operator_string_end ) {
      operator_string_end += 2;
      *operator_string_end = '\0';
    } else if ( strstr( operator_string_end, "<" ) == operator_string_end ) {
      operator_string_end += 1;
      *operator_string_end = '\0';
    } else if ( strstr( operator_string_end, ">" ) == operator_string_end ) {
      operator_string_end += 1;
      *operator_string_end = '\0';
    } else if ( strstr( operator_string_end, "~" ) == operator_string_end ) {
      operator_string_end += 1;
      *operator_string_end = '\0';
    } else if ( strstr( operator_string_end, "!" ) == operator_string_end ) {
      operator_string_end += 1;
      *operator_string_end = '\0';
    } else if ( strstr( operator_string_end, "+" ) == operator_string_end ) {
      operator_string_end += 1;
      *operator_string_end = '\0';
    } else if ( strstr( operator_string_end, "-" ) == operator_string_end ) {
      operator_string_end += 1;
      *operator_string_end = '\0';
    } else if ( strstr( operator_string_end, "*" ) == operator_string_end ) {
      operator_string_end += 1;
      *operator_string_end = '\0';
    } else if ( strstr( operator_string_end, "/" ) == operator_string_end ) {
      operator_string_end += 1;
      *operator_string_end = '\0';
    } else if ( strstr( operator_string_end, "%" ) == operator_string_end ) {
      operator_string_end += 1;
      *operator_string_end = '\0';
    } else if ( strstr( operator_string_end, "^" ) == operator_string_end ) {
      operator_string_end += 1;
      *operator_string_end = '\0';
    } else if ( strstr( operator_string_end, "&" ) == operator_string_end ) {
      operator_string_end += 1;
      *operator_string_end = '\0';
    } else if ( strstr( operator_string_end, "|" ) == operator_string_end ) {
      operator_string_end += 1;
      *operator_string_end = '\0';
    } else if ( strstr( operator_string_end, "," ) == operator_string_end ) {
      operator_string_end += 1;
      *operator_string_end = '\0';
    } else if ( strstr( operator_string_end, "=" ) == operator_string_end ) {
      operator_string_end += 1;
      *operator_string_end = '\0';
    }
    return operator_string_begin;
  }
  char* end_of_demangled_name = const_cast<char*>( strrchr( demangled_symbol, ')' ) );
  if ( end_of_demangled_name != NULL ) {
    int  pars = 1;
    char c;
    while ( pars > 0 && end_of_demangled_name != demangled_symbol ) {
      c = *( --end_of_demangled_name );
      if ( c == ')' ) {
        pars++;
      } else if ( c == '(' ) {
        pars--;
      }
    }
  } else {
    return demangled_symbol;
  }
  char* end_of_func_name = end_of_demangled_name;
  if ( end_of_func_name != NULL ) {
    *end_of_func_name = '\0';
    char c            = *( --end_of_func_name );
    if ( c == '>' ) {
      int pars = 1;
      while ( pars > 0 && end_of_func_name != demangled_symbol ) {
        c = *( --end_of_func_name );
        if ( c == '>' ) {
          pars++;
        } else if ( c == '<' ) {
          pars--;
        }
      }
      *end_of_func_name = '\0';
    }
    c = *( --end_of_func_name );
    while ( isalnum( c ) || c == '_' || c == '~' ) {
      c = *( --end_of_func_name );
    }
    return ++end_of_func_name;
  }
  return demangled_symbol;
}

// put_module()
// S_module *cur_module : pointer to the current module object to be written out in to HTML file
// const char *event    : name of architectural event being analysed
// const char *dir      : directory where sampling results input files are located
// creates or updates the HTML output file using information contained inside the module object given as a parameter
void put_S_module( S_module* cur_module, const char* dir )
{
  char module_name[MAX_MODULE_NAME_LENGTH];
  bzero( module_name, MAX_MODULE_NAME_LENGTH );
  strcpy( module_name, ( cur_module->get_module_name() ).c_str() );
  char module_filename[MAX_FILENAME_LENGTH];
  bzero( module_filename, MAX_FILENAME_LENGTH );
  strcpy( module_filename, dir );
  strcat( module_filename, "/HTML/" );
  strcat( module_filename, module_name );
  strcat( module_filename, ".html" );
  char event[MAX_EVENT_NAME_LENGTH];
  bzero( event, MAX_EVENT_NAME_LENGTH );
  strcpy( event, ( cur_module->get_event() ).c_str() );
  std::map<std::string, unsigned int>::iterator result = modules_tot_samples.find( cur_module->get_module_name() );
  FILE* module_file;
  if ( result == modules_tot_samples.end() ) // not found
  {
    if ( ( !strcmp( event, "UNHALTED_CORE_CYCLES" ) && !nehalem ) ||
         ( !strcmp( event, "CPU_CLK_UNHALTED:THREAD_P" ) && nehalem ) ) {
      modules_tot_samples.insert(
          std::pair<std::string, unsigned int>( cur_module->get_module_name(), cur_module->get_total_num_samples() ) );
    } else {
      modules_tot_samples.insert( std::pair<std::string, unsigned int>( cur_module->get_module_name(), 0 ) );
    }
    module_file = fopen( module_filename, "w" );
    if ( module_file == NULL ) {
      fprintf( stderr, "ERROR: Cannot create file %s!!!\naborting...\n", module_filename );
      exit( 1 );
    }
    fprintf( module_file, "<!DOCTYPE html PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\"  "
                          "\"http://www.w3.org/TR/html4/loose.dtd\">\n" );
    fprintf( module_file, "<html>\n" );
    fprintf( module_file, "<head>\n" );
    fprintf( module_file, "<title>\n" );
    fprintf( module_file, "%s\n", module_name );
    fprintf( module_file, "</title>\n" );
    fprintf( module_file, "</head>\n" );
    fprintf( module_file, "<body>\n" );
    fprintf( module_file, "<h2>%s</h2><br/>Events Sampled:<br/>\n", module_name );
    fprintf( module_file, "<ul>\n" );
    for ( std::vector<std::string>::const_iterator it = S_events.begin(); it != S_events.end(); ++it ) {
      fprintf( module_file, "<li><a href=\"#%s\">%s</a></li>\n", it->c_str(), it->c_str() );
    }
    fprintf( module_file, "</ul>\n" );
  } // if(result == modules_tot_samples.end()) //not found
  else {
    if ( ( !strcmp( event, "UNHALTED_CORE_CYCLES" ) && !nehalem ) ||
         ( !strcmp( event, "CPU_CLK_UNHALTED:THREAD_P" ) && nehalem ) ) {
      modules_tot_samples[cur_module->get_module_name()] = cur_module->get_total_num_samples();
    }
    module_file = fopen( module_filename, "a" );
  } // else:: if(result != modules_tot_samples.end()) //found!!
  char event_str[MAX_EVENT_NAME_LENGTH];
  bzero( event_str, MAX_EVENT_NAME_LENGTH );
  strcpy( event_str, event );
  if ( cur_module->get_c_mask() > 0 ) {
    sprintf( event_str, "%s CMASK=%d", event_str, cur_module->get_c_mask() );
  }
  if ( cur_module->get_inv_mask() > 0 ) {
    sprintf( event_str, "%s INV=%d", event_str, cur_module->get_inv_mask() );
  }
  fprintf( module_file, "<a name=\"%s\"><a>\n", event_str );
  fprintf( module_file, "<table cellpadding=\"5\">\n" );
  fprintf( module_file, "<tr bgcolor=\"#EEEEEE\">\n" );
  fprintf( module_file, "<th colspan=\"6\" align=\"left\">%s -- cmask: %u -- invmask: %u -- Total Samples: %u -- "
                        "Sampling Period: %d</th>\n",
           event, cur_module->get_c_mask(), cur_module->get_inv_mask(), cur_module->get_total_num_samples(),
           cur_module->get_smpl_period() );
  fprintf( module_file, "</tr>\n" );
  fprintf( module_file, "<tr bgcolor=\"#EEEEEE\">\n" );
  fprintf( module_file, "<th align=\"left\">Samples</th>\n" );
  fprintf( module_file, "<th align=\"left\">Percentage</th>\n" );
  fprintf( module_file, "<th align=\"left\">Symbol Name</th>\n" );
  fprintf( module_file, "<th align=\"left\">Library Name</th>\n" );
  fprintf( module_file, "<th align=\"left\">Complete Signature</th>\n" );
  fprintf( module_file, "<th align=\"left\">Library Pathname</th>\n" );
  fprintf( module_file, "</tr>\n" );
  for ( int j = 0; j < 20; j++ ) {
    char sym[MAX_SYM_LENGTH];
    char sym_mod[MAX_SYM_MOD_LENGTH];
    char lib[MAX_LIB_LENGTH];
    char lib_mod[MAX_LIB_MOD_LENGTH];
    char simple_sym[MAX_SIMPLE_SYM_LENGTH];
    char simple_sym_mod[MAX_SIMPLE_SYM_MOD_LENGTH];
    char simple_lib[MAX_SIMPLE_LIB_LENGTH];
    char simple_lib_mod[MAX_SIMPLE_LIB_MOD_LENGTH];

    bzero( sym, MAX_SYM_LENGTH );
    bzero( sym_mod, MAX_SYM_MOD_LENGTH );
    bzero( lib, MAX_LIB_LENGTH );
    bzero( lib_mod, MAX_LIB_MOD_LENGTH );
    bzero( simple_sym, MAX_SIMPLE_SYM_LENGTH );
    bzero( simple_sym_mod, MAX_SIMPLE_SYM_MOD_LENGTH );
    bzero( simple_lib, MAX_SIMPLE_LIB_LENGTH );
    bzero( simple_lib_mod, MAX_SIMPLE_LIB_MOD_LENGTH );

    char index[MAX_SAMPLE_INDEX_LENGTH];
    bzero( index, MAX_SAMPLE_INDEX_LENGTH );
    unsigned int value;
    bool         res = cur_module->get_max( index, &value );
    if ( !res ) break;
    char* sym_end = strchr( index, '%' );
    if ( sym_end == NULL ) // error
    {
      fprintf( stderr, "ERROR: Invalid sym and lib name! : %s\naborting...\n", index );
      exit( 1 );
    }
    strncpy( sym, index, strlen( index ) - strlen( sym_end ) );
    strcpy( lib, sym_end + 1 );
    char temp[MAX_SYM_LENGTH];
    bzero( temp, MAX_SYM_LENGTH );
    strcpy( temp, sym );
    strcpy( simple_sym, ( func_name( temp ) ) );
    if ( strrchr( lib, '/' ) != NULL && *( strrchr( lib, '/' ) + 1 ) != '\0' ) {
      strcpy( simple_lib, strrchr( lib, '/' ) + 1 );
    } else {
      strcpy( simple_lib, lib );
    }
    if ( j % 2 != 0 ) {
      fprintf( module_file, "<tr bgcolor=\"#FFFFCC\">\n" );
    } else {
      fprintf( module_file, "<tr bgcolor=\"#CCFFCC\">\n" );
    }
    fprintf( module_file, "<td style=\"font-family:monospace;font-size:large;color:DarkBlue\">%u</td>\n", value );
    fprintf( module_file, "<td style=\"font-family:monospace;font-size:large;color:DarkBlue\">%f%%</td>\n",
             ( ( (double)( value ) ) / ( (double)( cur_module->get_total_num_samples() ) ) ) * 100 );
    html_special_chars( simple_sym, simple_sym_mod );
    html_special_chars( simple_lib, simple_lib_mod );
    html_special_chars( sym, sym_mod );
    html_special_chars( lib, lib_mod );
    fprintf( module_file, "<td style=\"font-family:courier;\">%s</td>\n", simple_sym_mod );
    fprintf( module_file, "<td style=\"font-family:courier;\">%s</td>\n", simple_lib_mod );
    fprintf( module_file, "<td style=\"font-family:courier;\">%s</td>\n", sym_mod );
    fprintf( module_file, "<td style=\"font-family:courier;\">%s</td>\n</tr>\n", lib_mod );
  }
  fprintf( module_file, "</table><br/><br/>\n" );
  int res = fclose( module_file );
  if ( res ) {
    fprintf( stderr, "ERROR: Cannot close file %s!!!\naborting...\n", module_filename );
    exit( 1 );
  }
  return;
}

// read_S_file()
// const char *dir      : directory where sampling results input files are located
// const char *filename : name of the current file to analyse
// reads content of a gzipped sampling result file, finds names of symbols inside libraries using their offsets,
// demangles them to make them human-readable, creates the module objects (with their sampling values),
// and calls the put_module() function to create (or update) the corresponding HTML output file
// returns 0 on success
int read_S_file( const char* dir, const char* filename )
{
  char         line[MAX_LINE_LENGTH];
  char         event[MAX_EVENT_NAME_LENGTH];
  char         arch[MAX_ARCH_NAME_LENGTH];
  unsigned int cmask;
  unsigned int inv;
  unsigned int sp;
  char         cur_module_name[MAX_MODULE_NAME_LENGTH];
  bzero( line, MAX_LINE_LENGTH );
  bzero( event, MAX_EVENT_NAME_LENGTH );
  bzero( cur_module_name, MAX_MODULE_NAME_LENGTH );
  bzero( arch, MAX_ARCH_NAME_LENGTH );

  S_module*    cur_module = new S_module();
  unsigned int module_num = 0;

  char path_name[MAX_FILENAME_LENGTH];
  bzero( path_name, MAX_FILENAME_LENGTH );
  strcpy( path_name, dir );
  strcat( path_name, "/" );
  strcat( path_name, filename );
  gzFile res_file = gzopen( path_name, "rb" );

  if ( res_file != NULL ) {
    bzero( line, MAX_LINE_LENGTH );
    gzgets( res_file, line, MAX_LINE_LENGTH );
    if ( line[strlen( line ) - 1] == '\n' ) line[strlen( line ) - 1] = '\0';
    bzero( event, MAX_EVENT_NAME_LENGTH );
    sscanf( line, "%s %s %u %u %u", arch, event, &cmask, &inv, &sp );
    if ( !strcmp( arch, "NHM" ) )
      nehalem = true;
    else
      nehalem = false;
    bzero( line, MAX_LINE_LENGTH );
    while ( gzgets( res_file, line, MAX_LINE_LENGTH ) != Z_NULL ) {
      if ( line[strlen( line ) - 1] == '\n' ) line[strlen( line ) - 1] = '\0';
      if ( strchr( line, ' ' ) == NULL ) // module
      {
        if ( module_num > 0 ) {
          put_S_module( cur_module, dir );
          cur_module->clear();
        }
        module_num++;
        char* end_sym = strchr( line, '%' );
        if ( end_sym == NULL ) // error
        {
          fprintf( stderr, "ERROR: Invalid module name. \nLINE: %s\naborting...\n", line );
          exit( 1 );
        }
        bzero( cur_module_name, MAX_MODULE_NAME_LENGTH );
        strncpy( cur_module_name, line, strlen( line ) - strlen( end_sym ) );
        cur_module->init( cur_module_name, arch, event, cmask, inv, sp );
        cur_module->set_total( atoi( end_sym + 1 ) );
      }    // module
      else // symbol, libName, libOffset, value
      {
        unsigned int value = 0, libOffset = 0;
        char         symbol[MAX_SYM_LENGTH];
        char         libName[MAX_LIB_LENGTH];
        char         final_sym[MAX_SYM_MOD_LENGTH];
        char         final_lib[MAX_LIB_MOD_LENGTH];
        bzero( symbol, MAX_SYM_LENGTH );
        bzero( libName, MAX_LIB_LENGTH );
        bzero( final_sym, MAX_SYM_MOD_LENGTH );
        bzero( final_lib, MAX_LIB_MOD_LENGTH );

        sscanf( line, "%s %s %u %u", symbol, libName, &libOffset, &value );
        char realPathName_s[FILENAME_MAX];
        bzero( realPathName_s, FILENAME_MAX );
        char* realPathName = realpath( libName, realPathName_s );
        if ( realPathName != NULL && strlen( realPathName ) > 0 ) {
          std::map<std::string, FileInfo>::iterator result;
          result = libsInfo.find( realPathName );
          if ( result == libsInfo.end() ) {
            libsInfo[realPathName] = FileInfo( realPathName, true );
          }
          const char* temp_sym = libsInfo[realPathName].symbolByOffset( libOffset );
          if ( temp_sym != NULL && strlen( temp_sym ) > 0 ) {
            int   status;
            char* demangled_symbol = abi::__cxa_demangle( temp_sym, NULL, NULL, &status );
            if ( status == 0 ) {
              strcpy( final_sym, demangled_symbol );
              free( demangled_symbol );
            } else {
              strcpy( final_sym, temp_sym );
            }
          } else {
            strcpy( final_sym, "???" );
          }
          strcpy( final_lib, realPathName );
        } else {
          strcpy( final_sym, symbol );
          strcpy( final_lib, libName );
        }
        char index[MAX_LINE_LENGTH];
        bzero( index, MAX_LINE_LENGTH );
        strcpy( index, final_sym );
        strcat( index, "%" );
        strcat( index, final_lib );
        cur_module->add_sample( index, value );
      } // symbol, libName, libOffset, value
      bzero( line, MAX_LINE_LENGTH );
    }                                // while(gzgets(res_file, line, MAX_LINE_LENGTH)!=Z_NULL)
    put_S_module( cur_module, dir ); // last module!
    cur_module->clear();
    gzclose( res_file );
  } // if(res_file != NULL)
  else {
    fprintf( stderr, "ERROR: Unable to open input file: %s\naborting...\n", filename );
    exit( 1 );
  }
  delete cur_module; // delete it!
  return 0;
}

int read_S_events( const char* dir, const char* filename )
{
  char event[MAX_EVENT_NAME_LENGTH];
  char arch[MAX_ARCH_NAME_LENGTH];
  char line[MAX_LINE_LENGTH];
  char cmask_str[MAX_CMASK_STR_LENGTH];
  char inv_str[MAX_INV_STR_LENGTH];
  char sp_str[MAX_SP_STR_LENGTH];
  bzero( line, MAX_LINE_LENGTH );
  bzero( event, MAX_EVENT_NAME_LENGTH );
  bzero( arch, MAX_ARCH_NAME_LENGTH );
  bzero( cmask_str, MAX_CMASK_STR_LENGTH );
  bzero( inv_str, MAX_INV_STR_LENGTH );
  bzero( sp_str, MAX_SP_STR_LENGTH );
  char path_name[MAX_FILENAME_LENGTH];
  bzero( path_name, MAX_FILENAME_LENGTH );
  strcpy( path_name, dir );
  strcat( path_name, "/" );
  strcat( path_name, filename );
  gzFile res_file = gzopen( path_name, "rb" );
  if ( res_file != NULL ) {
    bzero( line, MAX_LINE_LENGTH );
    gzgets( res_file, line, MAX_LINE_LENGTH );
    if ( line[strlen( line ) - 1] == '\n' ) line[strlen( line ) - 1] = '\0';
    bzero( event, MAX_EVENT_NAME_LENGTH );
    sscanf( line, "%s %s %s %s %s\n", arch, event, cmask_str, inv_str, sp_str );
    std::string event_str( event );
    if ( atoi( cmask_str ) > 0 ) {
      event_str += " CMASK=";
      event_str += cmask_str;
    }
    if ( atoi( inv_str ) > 0 ) {
      event_str += " INV=";
      event_str += inv_str;
    }
    S_events.push_back( event_str );
  } // if(res_file != NULL)
  else {
    fprintf( stderr, "ERROR: Unable to open input file: %s\naborting...\n", filename );
    exit( 1 );
  }
  return 0;
}

// finalize_html_pages()
// const char *dir : directory contating sampling result files
// puts footers in module HTML pages and creates index file
int finalize_S_html_pages( const char* dir )
{
  for ( std::map<std::string, unsigned int>::const_iterator i = modules_tot_samples.begin();
        i != modules_tot_samples.end(); i++ ) {
    char module_filename[MAX_FILENAME_LENGTH];
    strcpy( module_filename, dir );
    strcat( module_filename, "/HTML/" );
    strcat( module_filename, ( i->first ).c_str() );
    strcat( module_filename, ".html" );
    FILE* module_file = fopen( module_filename, "a" );
    if ( module_file == NULL ) {
      fprintf( stderr, "ERROR: Unable to append to file: %s\naborting...\n", module_filename );
      exit( 1 );
    }
    fprintf( module_file, "</body>\n</html>\n" );
    if ( fclose( module_file ) ) {
      fprintf( stderr, "ERROR: Cannot close file %s!!!\naborting...\n", module_filename );
      exit( 1 );
    }
  }
  return 0;
}

// read_file()
// const char *filename    : input file to analyse
// analyses the event file and updates the list of modules with counter information found in the file
// returns the number of modules found in the file
int read_C_file( const char* dir, const char* filename )
{
  char event[MAX_EVENT_NAME_LENGTH];
  char arch[MAX_ARCH_NAME_LENGTH];
  char line[MAX_LINE_LENGTH];
  char cmask_str[MAX_CMASK_STR_LENGTH];
  char inv_str[MAX_INV_STR_LENGTH];
  char sp_str[MAX_SP_STR_LENGTH];
  char cur_module_name[MAX_MODULE_NAME_LENGTH];
  bzero( line, MAX_LINE_LENGTH );
  bzero( event, MAX_EVENT_NAME_LENGTH );
  bzero( cur_module_name, MAX_MODULE_NAME_LENGTH );
  bzero( arch, MAX_ARCH_NAME_LENGTH );
  bzero( line, MAX_LINE_LENGTH );
  bzero( cmask_str, MAX_CMASK_STR_LENGTH );
  bzero( inv_str, MAX_INV_STR_LENGTH );
  bzero( sp_str, MAX_SP_STR_LENGTH );
  int  number_of_modules = 0;
  long cur_sum           = 0;
  int  no_of_values      = 0;
  char path_name[MAX_FILENAME_LENGTH];
  bzero( path_name, MAX_FILENAME_LENGTH );
  strcpy( path_name, dir );
  strcat( path_name, "/" );
  strcat( path_name, filename );
  FILE* fp   = fopen( path_name, "r" );
  int   stat = fscanf( fp, "%s %s %s %s %s\n", arch, event, cmask_str, inv_str, sp_str );
  if ( stat != 5 ) {
    std::cerr << "ERROR: failed to parse " << path_name << std::endl;
    exit( 1 );
  }
  if ( !strcmp( arch, "NHM" ) )
    nehalem = true;
  else
    nehalem = false;
  std::string event_str( event );
  if ( atoi( cmask_str ) > 0 ) {
    event_str += " CMASK=";
    event_str += cmask_str;
  }
  if ( atoi( inv_str ) > 0 ) {
    event_str += " INV=";
    event_str += inv_str;
  }
  C_events.push_back( event_str );
  while ( fscanf( fp, "%s\n", line ) != EOF ) {
    if ( isalpha( line[0] ) ) // module
    {
      if ( number_of_modules > 0 ) {
        C_modules[cur_module_name][event_str] = (double)cur_sum / no_of_values;
        cur_sum                               = 0;
        no_of_values                          = 0;
      }
      strcpy( cur_module_name, line );
      number_of_modules++;
    } else if ( isdigit( line[0] ) ) // value
    {
      cur_sum += strtol( line, NULL, 10 );
      no_of_values++;
    }
  }
  C_modules[cur_module_name][event_str] = (double)cur_sum / no_of_values; // last module
  fclose( fp );
  return number_of_modules;
}

void put_C_header( FILE* fp, std::vector<std::string>& columns )
{
  fprintf(
      fp,
      "<!DOCTYPE html PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\"  \"http://www.w3.org/TR/html4/loose.dtd\">\n" );
  fprintf( fp, "<html>\n" );
  fprintf( fp, "<head>\n" );
  fprintf( fp, "<title>\n" );
  fprintf( fp, "Analysis Result\n" );
  fprintf( fp, "</title>\n" );
  fprintf( fp, "<script src=\"sorttable.js\"></script>\n" );
  fprintf( fp, "<style>\ntable.sortable thead "
               "{\nbackground-color:#eee;\ncolor:#666666;\nfont-weight:bold;\ncursor:default;\nfont-family:courier;\n}"
               "\n</style>\n" );
  fprintf( fp, "</head>\n" );
  fprintf( fp, "<body link=\"black\">\n" );
  fprintf( fp, "<h1>RESULTS:</h1><br/>Click for detailed symbol view...<p/>\n" );
  fprintf( fp, "<table class=\"sortable\" cellpadding=\"5\">\n" );
  fprintf( fp, "<tr>\n" );
  fprintf( fp, "<th>MODULE NAME</th>\n" );
  for ( std::vector<std::string>::const_iterator it = columns.begin(); it != columns.end(); ++it ) {
    if ( strlen( it->c_str() ) == 0 )
      fprintf( fp, "<th bgcolor=\"#FFFFFF\">&nbsp;</th>\n" );
    else
      fprintf( fp, "<th>%s</th>\n", ( *it ).c_str() );
  }
  fprintf( fp, "</tr>\n" );
  return;
}

void put_C_modules( FILE* fp, std::vector<std::string>& columns )
{
  int index = 0;
  for ( std::map<std::string, std::map<std::string, double>>::iterator it = C_modules.begin(); it != C_modules.end();
        ++it ) {
    if ( index % 2 )
      fprintf( fp, "<tr bgcolor=\"#FFFFCC\">\n" );
    else
      fprintf( fp, "<tr bgcolor=\"#CCFFCC\">\n" );
    fprintf( fp, "<td style=\"font-family:monospace;font-size:large;color:Black\"><a href=\"%s.html\">%s</a></td>\n",
             ( it->first ).c_str(), ( it->first ).c_str() );
    for ( std::vector<std::string>::const_iterator jt = columns.begin(); jt != columns.end(); ++jt ) {
      if ( strlen( jt->c_str() ) == 0 ) {
        fprintf( fp, "<td bgcolor=\"#FFFFFF\">&nbsp;</td>" );
      } else {
        if ( ( it->second ).find( *jt ) == ( it->second ).end() ) {
          fprintf( stderr, "ERROR: Cannot find derivate value \"%s\"!!!\naborting...\n", ( *jt ).c_str() );
          exit( 1 );
        }
        fprintf( fp, "<td style=\"font-family:monospace;font-size:large;color:DarkBlue\" align=\"right\">%.2f</td>\n",
                 ( it->second )[*jt] );
      }
    }
    fprintf( fp, "</tr>\n" );
    index++;
  }
}

void put_C_footer( FILE* fp )
{
  fprintf( fp, "</table>\n</body>\n</html>\n" );
  return;
}

void put_C_header_csv( FILE* fp, std::vector<std::string>& columns )
{
  fprintf( fp, "MODULE NAME" );
  for ( std::vector<std::string>::const_iterator it = columns.begin(); it != columns.end(); ++it ) {
    if ( strlen( it->c_str() ) == 0 ) {
    } else
      fprintf( fp, ",%s", ( *it ).c_str() );
  }
  fprintf( fp, "\n" );
  return;
}

void put_C_modules_csv( FILE* fp, std::vector<std::string>& columns )
{
  for ( std::map<std::string, std::map<std::string, double>>::iterator it = C_modules.begin(); it != C_modules.end();
        ++it ) {
    fprintf( fp, "%s", ( it->first ).c_str() );
    for ( std::vector<std::string>::const_iterator jt = columns.begin(); jt != columns.end(); ++jt ) {
      if ( strlen( jt->c_str() ) == 0 ) {
      } else {
        if ( ( it->second ).find( *jt ) == ( it->second ).end() ) {
          fprintf( stderr, "ERROR: Cannot find derivate value \"%s\"!!!\naborting...\n", ( *jt ).c_str() );
          exit( 1 );
        }
        fprintf( fp, ",%.2f", ( it->second )[*jt] );
      }
    }
    fprintf( fp, "\n" );
  }
}

// normalize()
// struct C_module *mod    : pointer to the head of the list of modules
// int counter             : event selected (see C_module class for which event corresponds to which number)
// int number_of_modules   : length of the list
// double value       : value to be normalized
// double normalizeTo      : value to which the value above should be normalized
// returns the normalized value
double normalize( std::string field, double value, double normalizeTo )
{
  double max = 0;
  double counter_value;
  for ( std::map<std::string, std::map<std::string, double>>::iterator it = C_modules.begin(); it != C_modules.end();
        ++it ) {
    counter_value                  = ( it->second )[field];
    if ( max < counter_value ) max = counter_value;
  }
  if ( value > 0 && max > 0 && normalizeTo > 0 ) {
    return 1. * value / max * normalizeTo;
  } else
    return 0;
}

// calc_post_deriv_values()
// struct C_module *mod    : pointer to the head of the list of modules
// double totalCycles : total cycles spent by all the modules
// int number_of_modules   : length of the list
// calculates the iFactor of each module
void calc_post_deriv_values()
{
  if ( nehalem ) {
    for ( std::map<std::string, std::map<std::string, double>>::iterator it = C_modules.begin(); it != C_modules.end();
          ++it ) {
      double simdnorm =
          1. - normalize( "Packed % of all UOPS Retired", ( it->second )["Packed % of all UOPS Retired"], 1 );
      double misspnorm = normalize( "% of Mispredicted Branches", ( it->second )["% of Mispredicted Branches"], 1 );
      double stallnorm = normalize( "Stalled Cycles", ( it->second )["Stalled Cycles"], 1 );
      ( it->second )["iFactor"] = stallnorm * ( simdnorm + misspnorm + stallnorm );
    }
  } else {
    for ( std::map<std::string, std::map<std::string, double>>::iterator it = C_modules.begin(); it != C_modules.end();
          ++it ) {
      double simdnorm =
          1. - normalize( "Packed SIMD % of all Instructions", ( it->second )["Packed SIMD % of all Instructions"], 1 );
      double misspnorm = normalize( "% of Mispredicted Branches", ( it->second )["% of Mispredicted Branches"], 1 );
      double stallnorm = normalize( "Stalled Cycles", ( it->second )["Stalled Cycles"], 1 );
      ( it->second )["iFactor"] = stallnorm * ( simdnorm + misspnorm + stallnorm );
    }
  }
}

// getTotalCycles()
// struct C_module *mod  : pointer to the head of the list of modules
// int number_of_modules : length of the list
// returns the number of total cycles spent by all the modules
double getTotalCycles()
{
  double sum = 0;
  if ( nehalem ) {
    for ( std::map<std::string, std::map<std::string, double>>::iterator it = C_modules.begin(); it != C_modules.end();
          ++it ) {
      sum += ( it->second )["CPU_CLK_UNHALTED:THREAD_P"];
    }
  } else {
    for ( std::map<std::string, std::map<std::string, double>>::iterator it = C_modules.begin(); it != C_modules.end();
          ++it ) {
      sum += ( it->second )["UNHALTED_CORE_CYCLES"];
    }
  }
  return sum;
}

// main()
// takes as argument the directory containing results
// and produces the HTML directory inside of it containing browsable statistics
int main( int argc, char* argv[] )
{
  if ( argc < 2 || argc > 4 ) {
    printf( "\n\nUsage: %s DIRECTORY [--caa] [--csv]\n\n", argv[0] );
    exit( 1 );
  }

  bool caa = false;
  bool csv = false;
  for ( int i = 2; i < argc; i++ ) {
    if ( !strcmp( argv[i], "--caa" ) ) caa = true;
    if ( !strcmp( argv[i], "--csv" ) ) csv = true;
  }

  char dir[MAX_FILENAME_LENGTH];
  strcpy( dir, argv[1] );
  if ( !csv ) {
    strcat( dir, "/HTML" );
    int res = mkdir( dir, S_IRWXU | S_IRWXG | S_IROTH | S_IXOTH );
    if ( res != 0 ) {
      fprintf( stderr, "ERROR: Cannot create directory %s\naborting...\n", dir );
      exit( 1 );
    }
  }

  DIR*           dp;
  struct dirent* dirp;
  int            num_of_modules = 0;
  if ( ( dp = opendir( argv[1] ) ) == NULL ) {
    printf( "Error(%d) opening %s\n", errno, argv[1] );
    return errno;
  }
  while ( ( dirp = readdir( dp ) ) != NULL ) {
    if ( strstr( dirp->d_name, "_S_" ) != NULL && strstr( dirp->d_name, ".txt.gz" ) != NULL && !csv ) {
      if ( read_S_events( argv[1], dirp->d_name ) ) {
        fprintf( stderr, "ERROR: Cannot read file %s\naborting...\n", dirp->d_name );
        exit( 1 );
      }
    }
  }
  closedir( dp );
  sort( S_events.begin(), S_events.end() );
  if ( ( dp = opendir( argv[1] ) ) == NULL ) {
    printf( "Error(%d) opening %s\n", errno, argv[1] );
    return errno;
  }
  while ( ( dirp = readdir( dp ) ) != NULL ) {
    if ( strstr( dirp->d_name, "_S_" ) != NULL && strstr( dirp->d_name, ".txt.gz" ) != NULL && !csv ) {
      if ( read_S_file( argv[1], dirp->d_name ) ) {
        fprintf( stderr, "ERROR: Cannot read file %s\naborting...\n", dirp->d_name );
        exit( 1 );
      }
    } else if ( strstr( dirp->d_name, "_C_" ) != NULL && strstr( dirp->d_name, ".txt" ) != NULL ) {
      int res = read_C_file( argv[1], dirp->d_name );
      if ( res > num_of_modules ) {
        num_of_modules = res;
      }
    }
  }
  closedir( dp );

  if ( !csv ) {
    if ( finalize_S_html_pages( argv[1] ) ) {
      fprintf( stderr, "ERROR: Cannot finalize HTML pages!!!\naborting...\n" );
      exit( 1 );
    }
  }

  char filepath[MAX_FILENAME_LENGTH];
  bzero( filepath, MAX_FILENAME_LENGTH );
  if ( !csv )
    sprintf( filepath, "%s/HTML/index.html", argv[1] );
  else
    sprintf( filepath, "%s/results.csv", argv[1] );
  FILE* fp = fopen( filepath, "w" );
  if ( fp == NULL ) {
    fprintf( stderr, "ERROR: Cannot create file index.html!!!\naborting...\n" );
    exit( 1 );
  }

  if ( caa ) {
    double totalCycles;
    if ( !nehalem ) {
      init_core_caa_events();
      if ( !check_for_core_caa_events() ) {
        fprintf( stderr, "(core) ERROR: One or more events for CAA missing!\naborting...\n" );
        exit( 1 );
      }
      init_core_caa_events_displ();
      totalCycles = getTotalCycles();
      calc_core_deriv_values( totalCycles );
      calc_post_deriv_values();
      if ( !csv ) {
        put_C_header( fp, core_caa_events_displ );
        put_C_modules( fp, core_caa_events_displ );
      } else {
        put_C_header_csv( fp, core_caa_events_displ );
        put_C_modules_csv( fp, core_caa_events_displ );
      }
    } else {
      init_nhm_caa_events();
      if ( !check_for_nhm_caa_events() ) {
        fprintf( stderr, "(nehalem) ERROR: One or more events for CAA missing!\naborting...\n" );
        exit( 1 );
      }
      init_nhm_caa_events_displ();
      totalCycles = getTotalCycles();
      calc_nhm_deriv_values( totalCycles );
      calc_post_deriv_values();
      if ( !csv ) {
        put_C_header( fp, nhm_caa_events_displ );
        put_C_modules( fp, nhm_caa_events_displ );
      } else {
        put_C_header_csv( fp, nhm_caa_events_displ );
        put_C_modules_csv( fp, nhm_caa_events_displ );
      }
    }
    if ( !csv ) put_C_footer( fp );
    fclose( fp );
  } else {
    if ( !csv ) {
      put_C_header( fp, C_events );
      put_C_modules( fp, C_events );
      put_C_footer( fp );
    } else {
      put_C_header_csv( fp, C_events );
      put_C_modules_csv( fp, C_events );
    }
    fclose( fp );
  }
  if ( !csv ) {
    char src[MAX_FILENAME_LENGTH];
    char dst[MAX_FILENAME_LENGTH];
    sprintf( src, "sorttable.js" );
    sprintf( dst, "%s/HTML/sorttable.js", argv[1] );
    int fd_src = open( src, O_RDONLY );
    if ( fd_src == -1 ) {
      fprintf( stderr, "ERROR: Cannot open file \"%s\"!\naborting...\n", src );
      exit( 1 );
    }
    int fd_dst = open( dst, O_WRONLY | O_CREAT | O_TRUNC, 0644 );
    if ( fd_dst == -1 ) {
      fprintf( stderr, "ERROR: Cannot open file \"%s\" (%s)!\naborting...\n", dst, strerror( errno ) );
      exit( 1 );
    }
    char c;
    while ( read( fd_src, &c, 1 ) ) {
      if ( write( fd_dst, &c, 1 ) == -1 ) {
        std::cerr << "ERROR: failed to write to " << dst << std::endl;
        exit( 1 );
      }
    }
    close( fd_dst );
    close( fd_src );
  }
  return 0;
}