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278 lines
6.8 KiB
C
278 lines
6.8 KiB
C
/*********************************************************
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*
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* File: p5prof.h
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* By: Kevin Baca
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*
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* MODIFIED BY Fab SO THAT RDMSR(...) WRITES EDX : EAX TO A LONG LONG
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* (WHICH MEANS WRITE THE LOW DWORD FIRST)
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*
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* Now in yer code do:
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* INT64 count,total;
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*
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* ...
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* RDMSR(0x10,&count); //inner loop count
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* total += count;
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* ...
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*
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* printf("0x%x %x", (INT32)total, *((INT32 *)&total+1));
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* // HIGH LOW
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*
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*********************************************************/
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/**\file
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\brief This file provides macros to profile your code.
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Here's how they work...
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As you may or may not know, the Pentium class of
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processors provides extremely fine grained profiling
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capabilities through the use of what are called
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Machine Specific Registers (MSRs). These registers
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can provide information about almost any aspect of
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CPU performance down to a single cycle.
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The MSRs of interest for profiling are specified by
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indices 0x10, 0x11, 0x12, and 0x13. Here is a brief
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description of each of these registers:
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MSR 0x10
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This register is simple a cycle counter.
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MSR 0x11
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This register controls what type of profiling data
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will be gathered.
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MSRs 0x12 and 0x13
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These registers gather the profiling data specified in
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MSR 0x11.
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Each MSR is 64 bits wide. For the Pentium processor,
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only the lower 32 bits of MSR 0x11 are valid. Bits 0-15
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specify what data will be gathered in MSR 0x12. Bits 16-31
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specify what data will be gathered in MSR 0x13. Both sets
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of bits have the same format:
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Bits 0-5 specify which hardware event will be tracked.
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Bit 6, if set, indicates events will be tracked in
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rings 0-2.
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Bit 7, if set, indicates events will be tracked in
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ring 3.
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Bit 8, if set, indicates cycles should be counted for
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the specified event. If clear, it indicates the
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number of events should be counted.
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Two instructions are provided for manupulating the MSRs.
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RDMSR (Read Machine Specific Register) and WRMSR
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(Write Machine Specific Register). These opcodes were
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originally undocumented and therefore most assemblers don't
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recognize them. Their byte codes are provided in the
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macros below.
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RDMSR takes the MSR index in ecx and the profiling criteria
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in edx : eax.
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WRMSR takes the MSR index in ecx and returns the profile data
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in edx : eax.
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Two profiling registers limits profiling capability to
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gathering only two types of information. The register
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usage can, however, be combined in interesting ways.
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For example, you can set one register to gather the
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number of a specific type of event while the other gathers
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the number of cycles for the same event. Or you can
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gather the number of two separate events while using
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MSR 0x10 to gather the number of cycles.
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The enumerated list provides somewhat readable labels for
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the types of events that can be tracked.
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For more information, get ahold of appendix H from the
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Intel Pentium programmer's manual (I don't remember the
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order number) or go to
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http://green.kaist.ac.kr/jwhahn/art3.htm.
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That's an article by Terje Mathisen where I got most of
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my information.
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You may use this code however you wish. I hope it's
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useful and I hope I got everything right.
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-Kevin
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kbaca@skygames.com
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*/
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#ifdef __GNUC__
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#define RDTSC(_dst) \
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__asm__("
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.byte 0x0F,0x31
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movl %%edx,(%%edi)
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movl %%eax,4(%%edi)"\
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: : "D" (_dst) : "eax", "edx", "edi")
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// the old code... swapped it
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// movl %%edx,(%%edi)
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// movl %%eax,4(%%edi)"
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#define RDMSR(_msri, _msrd) \
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__asm__("
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.byte 0x0F,0x32
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movl %%eax,(%%edi)
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movl %%edx,4(%%edi)"\
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: : "c" (_msri), "D" (_msrd) : "eax", "ecx", "edx", "edi")
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#define WRMSR(_msri, _msrd) \
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__asm__("
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xorl %%edx,%%edx
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.byte 0x0F,0x30"\
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: : "c" (_msri), "a" (_msrd) : "eax", "ecx", "edx")
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#define RDMSR_0x12_0x13(_msr12, _msr13) \
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__asm__("
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movl $0x12,%%ecx
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.byte 0x0F,0x32
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movl %%edx,(%%edi)
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movl %%eax,4(%%edi)
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movl $0x13,%%ecx
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.byte 0x0F,0x32
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movl %%edx,(%%esi)
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movl %%eax,4(%%esi)"\
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: : "D" (_msr12), "S" (_msr13) : "eax", "ecx", "edx", "edi")
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#define ZERO_MSR_0x12_0x13() \
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__asm__("
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xorl %%edx,%%edx
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xorl %%eax,%%eax
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movl $0x12,%%ecx
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.byte 0x0F,0x30
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movl $0x13,%%ecx
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.byte 0x0F,0x30"\
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: : : "eax", "ecx", "edx")
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#elif defined (__WATCOMC__)
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extern void RDTSC(UINT32 *dst);
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#pragma aux RDTSC =\
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"db 0x0F,0x31"\
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"mov [edi],edx"\
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"mov [4+edi],eax"\
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parm [edi]\
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modify [eax edx edi];
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extern void RDMSR(UINT32 msri, UINT32 *msrd);
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#pragma aux RDMSR =\
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"db 0x0F,0x32"\
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"mov [edi],edx"\
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"mov [4+edi],eax"\
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parm [ecx] [edi]\
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modify [eax ecx edx edi];
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extern void WRMSR(UINT32 msri, UINT32 msrd);
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#pragma aux WRMSR =\
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"xor edx,edx"\
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"db 0x0F,0x30"\
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parm [ecx] [eax]\
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modify [eax ecx edx];
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extern void RDMSR_0x12_0x13(UINT32 *msr12, UINT32 *msr13);
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#pragma aux RDMSR_0x12_0x13 =\
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"mov ecx,0x12"\
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"db 0x0F,0x32"\
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"mov [edi],edx"\
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"mov [4+edi],eax"\
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"mov ecx,0x13"\
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"db 0x0F,0x32"\
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"mov [esi],edx"\
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"mov [4+esi],eax"\
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parm [edi] [esi]\
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modify [eax ecx edx edi esi];
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extern void ZERO_MSR_0x12_0x13(void);
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#pragma aux ZERO_MSR_0x12_0x13 =\
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"xor edx,edx"\
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"xor eax,eax"\
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"mov ecx,0x12"\
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"db 0x0F,0x30"\
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"mov ecx,0x13"\
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"db 0x0F,0x30"\
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modify [eax ecx edx];
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#endif
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typedef enum
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{
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DataRead,
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DataWrite,
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DataTLBMiss,
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DataReadMiss,
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DataWriteMiss,
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WriteHitEM,
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DataCacheLinesWritten,
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DataCacheSnoops,
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DataCacheSnoopHit,
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MemAccessBothPipes,
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BankConflict,
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MisalignedDataRef,
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CodeRead,
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CodeTLBMiss,
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CodeCacheMiss,
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SegRegLoad,
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RESERVED0,
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RESERVED1,
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Branch,
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BTBHit,
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TakenBranchOrBTBHit,
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PipelineFlush,
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InstructionsExeced,
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InstructionsExecedVPipe,
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BusUtilizationClocks,
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PipelineStalledWriteBackup,
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PipelineStalledDateMemRead,
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PipeLineStalledWriteEM,
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LockedBusCycle,
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IOReadOrWriteCycle,
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NonCacheableMemRef,
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AGI,
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RESERVED2,
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RESERVED3,
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FPOperation,
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Breakpoint0Match,
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Breakpoint1Match,
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Breakpoint2Match,
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Breakpoint3Match,
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HWInterrupt,
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DataReadOrWrite,
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DataReadOrWriteMiss
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};
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#define PROF_CYCLES (0x100)
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#define PROF_EVENTS (0x000)
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#define RING_012 (0x40)
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#define RING_3 (0x80)
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#define RING_0123 (RING_012 | RING_3)
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/*void ProfSetProfiles(UINT32 msr12, UINT32 msr13);*/
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#define ProfSetProfiles(_msr12, _msr13)\
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{\
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UINT32 prof;\
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\
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prof = (_msr12) | ((_msr13) << 16);\
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WRMSR(0x11, prof);\
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}
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/*void ProfBeginProfiles(void);*/
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#define ProfBeginProfiles()\
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ZERO_MSR_0x12_0x13();
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/*void ProfGetProfiles(UINT32 msr12[2], UINT32 msr13[2]);*/
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#define ProfGetProfiles(_msr12, _msr13)\
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RDMSR_0x12_0x13(_msr12, _msr13);
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/*void ProfZeroTimer(void);*/
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#define ProfZeroTimer()\
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WRMSR(0x10, 0);
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/*void ProfReadTimer(UINT32 timer[2]);*/
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#define ProfReadTimer(timer)\
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RDMSR(0x10, timer);
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/*EOF*/
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