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Added ICACHE statistics

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This commit is contained in:
Stanislav Shwartsman 2005-03-10 21:22:15 +00:00
parent 4682628f17
commit 714b9c9d22
1 changed files with 36 additions and 3 deletions
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39
bochs/cpu/cpu.cc
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@ -1,5 +1,5 @@
/////////////////////////////////////////////////////////////////////////
// $Id: cpu.cc,v 1.99 2005-02-28 18:56:03 sshwarts Exp $
// $Id: cpu.cc,v 1.100 2005-03-10 21:22:15 sshwarts Exp $
/////////////////////////////////////////////////////////////////////////
//
// Copyright (C) 2001 MandrakeSoft S.A.
@ -69,6 +69,33 @@ BOCHSAPI BX_CPU_C *bx_cpu_array[BX_SMP_PROCESSORS];
BOCHSAPI BX_MEM_C *bx_mem_array[BX_ADDRESS_SPACES];
#endif
#if BX_SUPPORT_ICACHE
#define InstrumentICACHE 0
#if InstrumentICACHE
static unsigned iCacheLookups=0;
static unsigned iCacheMisses=0;
#define InstrICache_StatsMask 0xffffff
#define InstrICache_Stats() {\
if ((iCacheLookups & InstrICache_StatsMask) == 0) { \
BX_INFO(("ICACHE lookups: %u, misses: %u, hit rate = %6.2f%% ", \
iCacheLookups, \
iCacheMisses, \
(iCacheLookups-iCacheMisses) * 100.0 / iCacheLookups)); \
iCacheLookups = iCacheMisses = 0; \
} \
}
#define InstrICache_Increment(v) (v)++
#else
#define InstrICache_Stats()
#define InstrICache_Increment(v)
#endif
#endif
// notes:
@ -134,9 +161,9 @@ BX_CPU_C::cpu_loop(Bit32s max_instr_count)
// the debugger may request that control is returned to it so that
// the situation may be examined.
if (bx_guard.special_unwind_stack) {
printf("CPU_LOOP %d\n", bx_guard.special_unwind_stack);
printf("CPU_LOOP %d\n", bx_guard.special_unwind_stack);
return;
}
}
#endif
// We get here either by a normal function call, or by a longjmp
@ -194,6 +221,11 @@ printf("CPU_LOOP %d\n", bx_guard.special_unwind_stack);
Bit32u pageWriteStamp = BX_CPU_THIS_PTR iCache.getPageWriteStamp(pAddr);
#if BX_SUPPORT_ICACHE
InstrICache_Increment(iCacheLookups);
InstrICache_Stats();
#endif
if ((cache_entry->pAddr == pAddr) &&
(cache_entry->writeStamp == pageWriteStamp))
{
@ -221,6 +253,7 @@ printf("CPU_LOOP %d\n", bx_guard.special_unwind_stack);
#if BX_SUPPORT_ICACHE
// The entry will be marked valid if fetchdecode will succeed
cache_entry->writeStamp = ICacheWriteStampInvalid;
InstrICache_Increment(iCacheMisses);
#endif
#if BX_SUPPORT_X86_64