BasicViewTest.py

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#!/usr/bin/env gaudirun.py

"""
A test for basic functionality of sub-event scheduling.
Algorithms A2 and A3 should run twice per event, in sub-event contexts.
 
The ViewTester is an algorithm specifically designed to create sub-event
contexts, pass them to the scheduler, and report on the current context.
 
Four instances of ViewTester are used as follows:
 - Algorithm A1 creates two sub-event contexts
   - Algorithms A2 and A3 run within the sub-event contexts
 - Algorithm A4 runs in the whole event context, after the sub-events
 
"""
 
from Configurables import (
    AlgResourcePool,
    AvalancheSchedulerSvc,
    CPUCruncher,
    Gaudi__Sequencer,
    HiveSlimEventLoopMgr,
    HiveWhiteBoard,
    Test__ViewTester,
)
from Gaudi.Configuration import *
 
# metaconfig -------------------------------------------------------------------
# It's confortable to collect the relevant parameters at the top of the optionfile
evtslots = 1
evtMax = 10
cardinality = 1
threads = 1
viewsPerEvt = 2
# -------------------------------------------------------------------------------
 
# The configuration of the whiteboard ------------------------------------------
# It is useful to call it EventDataSvc to replace the usual data service with
# the whiteboard transparently.
 
whiteboard = HiveWhiteBoard("EventDataSvc", EventSlots=evtslots)
 
# -------------------------------------------------------------------------------
 
# Event Loop Manager -----------------------------------------------------------
# It's called slim since it has less functionalities overall than the good-old
# event loop manager. Here we just set its outputlevel to DEBUG.
 
slimeventloopmgr = HiveSlimEventLoopMgr(
    SchedulerName="AvalancheSchedulerSvc", OutputLevel=INFO
)
 
# -------------------------------------------------------------------------------
 
# ForwardScheduler -------------------------------------------------------------
# We just decide how many algorithms in flight we want to have and how many
# threads in the pool. The default value is -1, which is for TBB equivalent
# to take over the whole machine.
 
scheduler = AvalancheSchedulerSvc(ThreadPoolSize=threads, OutputLevel=INFO)
 
# -------------------------------------------------------------------------------
 
# Algo Resource Pool -----------------------------------------------------------
# Nothing special here, we just set the debug level.
AlgResourcePool(OutputLevel=INFO)
 
# -------------------------------------------------------------------------------
 
# Set up of the crunchers, daily business --------------------------------------
 
a1 = Test__ViewTester("A1")
a1.baseViewName = "view"
a1.viewNumber = viewsPerEvt
a1.viewNodeName = "viewNode"
 
a2 = Test__ViewTester("A2")
a2.viewNodeName = ""
 
a3 = Test__ViewTester("A3")
a3.viewNodeName = ""
 
a4 = Test__ViewTester("A4")
a4.viewNodeName = ""
 
for algo in [a1, a2, a3, a4]:
    algo.Cardinality = cardinality
    algo.OutputLevel = INFO
 
viewNode = Gaudi__Sequencer(
    "viewNode", Members=[a2, a3], Sequential=False, ShortCircuit=False, OutputLevel=INFO
)
 
createViewSeq = Gaudi__Sequencer(
    "createViewSeq", Members=[a1, viewNode, a4], Sequential=True, OutputLevel=INFO
)
 
# Application Manager ----------------------------------------------------------
# We put everything together and change the type of message service
 
ApplicationMgr(
    EvtMax=evtMax,
    EvtSel="NONE",
    ExtSvc=[whiteboard],
    EventLoop=slimeventloopmgr,
    TopAlg=[createViewSeq],
    MessageSvcType="InertMessageSvc",
)
 
# -------------------------------------------------------------------------------