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Shumin Lee edited this page Mar 31, 2017 · 1 revision

Instruction (Micro Operation) 개수 확인

Total Instruction 개수 출력 함수

  • $ vi gem5/src/cpu/base.hh
    ....

550     static int numSimulatedCPUs() { return cpuList.size(); }
551     static Counter numSimulatedInsts()
552     {
553         Counter total = 0;
554 
555         int size = cpuList.size();
556         for (int i = 0; i < size; ++i)
557             total += cpuList[i]->totalInsts();
558 
559         return total;
560     }
561 
562     static Counter numSimulatedOps()
563     {
564         Counter total = 0;
565 
566         int size = cpuList.size();
567         for (int i = 0; i < size; ++i)
568             total += cpuList[i]->totalOps();
569 
570         return total;
571     }

    ....
  • $ vi gem5/src/cpu/or3/cpu.cc
    ....

 690 template <class Impl>
 691 Counter
 692 FullO3CPU<Impl>::totalOps() const
 693 {
 694     Counter total(0);
 695 
 696     ThreadID size = thread.size();
 697     for (ThreadID i = 0; i < size; i++)
 698         total += thread[i]->numOp;
 699 
 700     return total;
 701 }

    ....

Instruction 개수 증가

  • $ vi gem5/src/cpu/o3/cpu.cc
    ....

1432 FullO3CPU<Impl>::instDone(ThreadID tid, DynInstPtr &inst)
1433 {                                
1434     // Keep an instruction count.
1435     if (!inst->isMicroop() || inst->isLastMicroop()) {
1436         thread[tid]->numInst++;
1437         thread[tid]->numInsts++;
1438         committedInsts[tid]++;
1439         system->totalNumInsts++;
1440
1441         // Check for instruction-count-based events.
1442         comInstEventQueue[tid]->serviceEvents(thread[tid]->numInst);
1443         system->instEventQueue.serviceEvents(system->totalNumInsts);
1444     }
1445     thread[tid]->numOp++;
1446     thread[tid]->numOps++;
1447     committedOps[tid]++;
1448
1449     probeInstCommit(inst->staticInst);
1450 }

    ....
  • $ vi gem5/src/cpu/o3/cpu.hh
    ....

660     /** Pointers to all of the threads in the CPU. */
661     std::vector<Thread *> thread;              

    ....
  • $ vi gem5/src/cpu/o3/cpu.hh
    ....

107     typedef O3ThreadState<Impl> Thread;

    ....
  • $ vi gem5/src/cpu/o3/thread_state.hh
    ....

 48 #include "cpu/thread_context.hh"
 49 #include "cpu/thread_state.hh"
 50 #include "sim/full_system.hh"

    ....

 67 template <class Impl>
 68 struct O3ThreadState : public ThreadState {

    ....
  • $ vi gem5/src/cpu/thread_state.hh
    ....

128   public:
129 
130     /** Number of instructions committed. */
131     Counter numInst;
132     /** Stat for number instructions committed. */
133     Stats::Scalar numInsts;
134     /** Number of ops (including micro ops) committed. */
135     Counter numOp;
136     /** Stat for number ops (including micro ops) committed. */
137     Stats::Scalar numOps;

    ....

Instruction 개수가 count 되는 위치 (instDone() 함수가 불리는 위치)

  • $ vi gem5/src/cpu/o3/commit_impl.hh
    ....

1369     // To match the old model, don't count nops and instruction
1370     // prefetches towards the total commit count.
1371     if (!inst->isNop() && !inst->isInstPrefetch()) {
1372         cpu->instDone(tid, inst);
1373     }                                 

    ....
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