#include <PfmCodeAnalyser.h>

Collaboration diagram for PfmCodeAnalyser:

Public Member Functions
void	start ()
void	stop ()
void	stop_init ()
Static Public Member Functions
static PfmCodeAnalyser &	Instance (const char event0="UNHALTED_CORE_CYCLES", unsigned int cmask_v0=0, bool inv_v0=false, const char event1="", unsigned int cmask_v1=0, bool inv_v1=false, const char event2="", unsigned int cmask_v2=0, bool inv_v2=false, const char event3="", unsigned int cmask_v3=0, bool inv_v3=false)
Private Member Functions
	PfmCodeAnalyser (const char event0, unsigned int cmask_v0, bool inv_v0, const char event1, unsigned int cmask_v1, bool inv_v1, const char event2, unsigned int cmask_v2, bool inv_v2, const char event3, unsigned int cmask_v3, bool inv_v3)
	PfmCodeAnalyser (PfmCodeAnalyser const &)
PfmCodeAnalyser &	operator= (PfmCodeAnalyser const &)
	~PfmCodeAnalyser ()
Private Attributes
int	used_counters_number
int	nehalem
pfmlib_input_param_t	inp
pfmlib_output_param_t	outp
pfarg_ctx_t	ctx
pfarg_pmd_t	pd [NUM_PMDS]
pfarg_pmc_t	pc [NUM_PMCS]
pfarg_load_t	load_arg
int	fd
char	event_str [MAX_NUMBER_OF_PROGRAMMABLE_COUNTERS][MAX_EVT_NAME_LEN]
bool	inv [MAX_NUMBER_OF_PROGRAMMABLE_COUNTERS]
unsigned int	cmask [MAX_NUMBER_OF_PROGRAMMABLE_COUNTERS]
pfmlib_core_input_param_t	params
pfmlib_nhm_input_param_t	nhm_params
int	ret
unsigned	i
unsigned long	sum [MAX_NUMBER_OF_PROGRAMMABLE_COUNTERS]
unsigned	count
unsigned	overhead_avg [MAX_NUMBER_OF_PROGRAMMABLE_COUNTERS]

Detailed Description

Definition at line 22 of file PfmCodeAnalyser.h.

Constructor & Destructor Documentation

PfmCodeAnalyser::PfmCodeAnalyser	(	const char *	event0,
		unsigned int	cmask_v0,
		bool	inv_v0,
		const char *	event1,
		unsigned int	cmask_v1,
		bool	inv_v1,
		const char *	event2,
		unsigned int	cmask_v2,
		bool	inv_v2,
		const char *	event3,
		unsigned int	cmask_v3,
		bool	inv_v3
	)		`[private]`

Definition at line 64 of file PfmCodeAnalyser.h.

{
 int ax,bx,cx,dx;
 cpuid(1,ax,bx,cx,dx);
 int sse4_2_mask = 1 << 20;
 nehalem = cx & sse4_2_mask;
 strcpy(event_str[0], event0);
 strcpy(event_str[1], event1);
 strcpy(event_str[2], event2);
 strcpy(event_str[3], event3);
 cmask[0] = cmask_v0;
 cmask[1] = cmask_v1;
 cmask[2] = cmask_v2;
 cmask[3] = cmask_v3;
 inv[0] = inv_v0;
 inv[1] = inv_v1;
 inv[2] = inv_v2;
 inv[3] = inv_v3;
 used_counters_number = 0;
 for(int i=0; i<MAX_NUMBER_OF_PROGRAMMABLE_COUNTERS; i++) 
 {
  if(strlen(event_str[i])>0) used_counters_number++;
 }
 for(int i=0; i<used_counters_number; i++) 
 {
  sum[i] = 0;
  overhead_avg[i] = 0;
 }
 count = 0;
 if(pfm_initialize() != PFMLIB_SUCCESS)
 {
  printf("Cannot initialize perfmon!!\nExiting...\n");
  exit(0);
 }
 while(count<3)
 {
  start();
  stop_init();
 }
 for(int i=0; i<used_counters_number; i++) 
 {
  sum[i] = 0;
 }
 count = 0;
 while(count<10)
 {
  start();
  stop_init();
 }
 for(int i=0; i<used_counters_number; i++) 
 {
  overhead_avg[i] = sum[i]/count;
  sum[i] = 0;
 }
 count = 0;
}

PfmCodeAnalyser::PfmCodeAnalyser ( PfmCodeAnalyser const & ) [private]

PfmCodeAnalyser::~PfmCodeAnalyser ( ) [private]

Definition at line 255 of file PfmCodeAnalyser.h.

{
 for(int i=0; i<used_counters_number; i++) 
 {
  printf("Event: %s\nTotal count:%lu\nNumber of counts:%u\nAverage count:%f\nOverhead removed:%u\n", event_str[i], sum[i], count, (double)sum[i]/count, overhead_avg[i]);
 }
}

Member Function Documentation

PfmCodeAnalyser & PfmCodeAnalyser::Instance	(	const char *	event0 = `"UNHALTED_CORE_CYCLES"`,
		unsigned int	cmask_v0 = `0`,
		bool	inv_v0 = `false`,
		const char *	event1 = `""`,
		unsigned int	cmask_v1 = `0`,
		bool	inv_v1 = `false`,
		const char *	event2 = `""`,
		unsigned int	cmask_v2 = `0`,
		bool	inv_v2 = `false`,
		const char *	event3 = `""`,
		unsigned int	cmask_v3 = `0`,
		bool	inv_v3 = `false`
	)		`[static]`

Definition at line 124 of file PfmCodeAnalyser.h.

{
 static PfmCodeAnalyser theSingleton(event0, cmask_v0, inv_v0, event1, cmask_v1, inv_v1, event2, cmask_v2, inv_v2, event3, cmask_v3, inv_v3);
 return theSingleton;
}

PfmCodeAnalyser& PfmCodeAnalyser::operator= ( PfmCodeAnalyser const & ) [private]

void PfmCodeAnalyser::start ( )

Definition at line 135 of file PfmCodeAnalyser.h.

{
 memset(&ctx,0, sizeof(ctx));
 memset(&inp,0, sizeof(inp));
 memset(&outp,0, sizeof(outp));
 memset(pd, 0, sizeof(pd));
 memset(pc, 0, sizeof(pc));
 memset(&load_arg, 0, sizeof(load_arg));
 memset(&params, 0, sizeof(params));
 for(int i=0; i<used_counters_number; i++) 
 {
  ret = pfm_find_full_event(event_str[i], &inp.pfp_events[i]);
  if(ret != PFMLIB_SUCCESS)
  {
   fprintf(stderr, "ERROR: cannot find event: %s\naborting...\n", event_str[i]);
   exit(1);
  }
 }
 inp.pfp_dfl_plm = PFM_PLM3; 
 inp.pfp_event_count = used_counters_number;
 for(int i=0; i<used_counters_number; i++) 
 {
  if(inv[i])
  {
   (params.pfp_core_counters[i]).flags |= PFM_CORE_SEL_INV;
   (nhm_params.pfp_nhm_counters[i]).flags |= PFM_NHM_SEL_INV;
  }
  if(cmask[i]>0)
  {
   (params.pfp_core_counters[i]).cnt_mask = cmask[i];
   (nhm_params.pfp_nhm_counters[i]).cnt_mask = cmask[i];
  }
 }
 if(nehalem)
 {
  ret = pfm_dispatch_events(&inp, &nhm_params, &outp, NULL);
 }
 else
 {
  ret = pfm_dispatch_events(&inp, &params, &outp, NULL);
 }
 if(ret != PFMLIB_SUCCESS)
 {
  fprintf(stderr, "ERROR: cannot dispatch events: %s\naborting...\n", pfm_strerror(ret));
  exit(1);
 }
 for(unsigned int i=0; i<outp.pfp_pmc_count; i++)
 {
  pc[i].reg_num = outp.pfp_pmcs[i].reg_num;
  pc[i].reg_value = outp.pfp_pmcs[i].reg_value;
 }
 for(unsigned int i=0; i<outp.pfp_pmd_count; i++)
 {
  pd[i].reg_num = outp.pfp_pmds[i].reg_num;
  pd[i].reg_value = 0;
 }
 fd = pfm_create_context(&ctx, NULL, 0, 0);
 if(fd == -1)
 {
  fprintf(stderr, "ERROR: Context not created\naborting...\n");
  exit(1);
 }
 if(pfm_write_pmcs(fd, pc, outp.pfp_pmc_count) == -1)
 {
  fprintf(stderr, "ERROR: Could not write pmcs\naborting...\n");
  exit(1);
 }
 if(pfm_write_pmds(fd, pd, outp.pfp_pmd_count) == -1)
 {
  fprintf(stderr, "ERROR: Could not write pmds\naborting...\n");
  exit(1);
 }
 load_arg.load_pid = getpid();
 if(pfm_load_context(fd, &load_arg) == -1)
 {
  fprintf(stderr, "ERROR: Could not load context\naborting...\n");
  exit(1);
 }
 pfm_start(fd, NULL);   
}

void PfmCodeAnalyser::stop ( )

Definition at line 221 of file PfmCodeAnalyser.h.

{
 pfm_stop(fd);
 if(pfm_read_pmds(fd, pd, inp.pfp_event_count) == -1)
 {
  fprintf(stderr, "ERROR: Could not read pmds\naborting...\n");
  exit(1);
 }
 
 for(int i=0; i<used_counters_number; i++) 
 {
  sum[i] += (pd[i].reg_value - overhead_avg[i]);
 }
 count++;
 close(fd);
}

void PfmCodeAnalyser::stop_init ( )

Definition at line 238 of file PfmCodeAnalyser.h.

{
 pfm_stop(fd);
 if(pfm_read_pmds(fd, pd, inp.pfp_event_count) == -1)
 {
  fprintf(stderr, "ERROR: Could not read pmds\naborting...\n");
  exit(1);
 }
 
 for(int i=0; i<used_counters_number; i++) 
 {
  sum[i] += (pd[i].reg_value);
 }
 count++;
 close(fd);
}