p5prof.h

/*********************************************************
 *
 * File:  p5prof.h
 * By:    Kevin Baca
 *
 * MODIFIED BY Fab SO THAT RDMSR(...) WRITES EDX:EAX TO A LONG LONG
 * (WHICH MEANS WRITE THE LOW DWORD FIRST)
 *
 * Now in yer code do:
 *   long long count,total;
 *
 *   ...
 *   RDMSR(0x10,&count);        //inner loop count
 *   total += count;
 *   ...
 *
 *   printf("0x%x %x", (int)total, *((int *)&total+1) );
 *   //                  HIGH        LOW
 *
 *********************************************************/


/*********************************************************
 * This file provides macros to profile your code.
 * Here's how they work...
 *
 * As you may or may not know, the Pentium class of
 * processors provides extremely fine grained profiling
 * capabilities through the use of what are called
 * Machine Specific Registers (MSRs). These registers
 * can provide information about almost any aspect of
 * CPU performance down to a single cycle.
 *
 * The MSRs of interest for profiling are specified by
 * indices 0x10, 0x11, 0x12, and 0x13.  Here is a brief
 * description of each of these registers:
 *
 * MSR 0x10
 *    This register is simple a cycle counter.
 *
 * MSR 0x11
 *    This register controls what type of profiling data
 * will be gathered.
 *
 * MSRs 0x12 and 0x13
 *    These registers gather the profiling data specified in
 * MSR 0x11.
 *
 * Each MSR is 64 bits wide.  For the Pentium processor,
 * only the lower 32 bits of MSR 0x11 are valid.  Bits 0-15
 * specify what data will be gathered in MSR 0x12.  Bits 16-31
 * specify what data will be gathered in MSR 0x13.  Both sets
 * of bits have the same format:
 *
 * Bits 0-5 specify which hardware event will be tracked.
 * Bit 6, if set, indicates events will be tracked in
 * rings 0-2.
 * Bit 7, if set, indicates events will be tracked in
 * ring 3.
 * Bit 8, if set, indicates cycles should be counted for
 * the specified event.  If clear, it indicates the
 * number of events should be counted.
 *
 * Two instructions are provided for manupulating the MSRs.
 * RDMSR (Read Machine Specific Register) and WRMSR
 * (Write Machine Specific Register).  These opcodes were
 * originally undocumented and therefore most assemblers don't
 * recognize them.  Their byte codes are provided in the
 * macros below.
 *
 * RDMSR takes the MSR index in ecx and the profiling criteria
 * in edx:eax.
 *
 * WRMSR takes the MSR index in ecx and returns the profile data
 * in edx:eax.
 *
 * Two profiling registers limits profiling capability to
 * gathering only two types of information.  The register
 * usage can, however, be combined in interesting ways.
 * For example, you can set one register to gather the
 * number of a specific type of event while the other gathers
 * the number of cycles for the same event.  Or you can
 * gather the number of two separate events while using
 * MSR 0x10 to gather the number of cycles.
 *
 * The enumerated list provides somewhat readable labels for
 * the types of events that can be tracked.
 *
 * For more information, get ahold of appendix H from the
 * Intel Pentium programmer's manual (I don't remember the
 * order number) or go to
 * http://green.kaist.ac.kr/jwhahn/art3.htm.
 * That's an article by Terje Mathisen where I got most of
 * my information.
 *
 * You may use this code however you wish.  I hope it's
 * useful and I hope I got everything right.
 *
 * -Kevin
 *
 * kbaca@skygames.com
 *
 *********************************************************/

#ifdef __GNUC__

#define RDTSC(_dst) \
__asm__("
     .byte 0x0F,0x31
     movl %%edx,(%%edi)
     movl %%eax,4(%%edi)"\
: : "D" (_dst) : "eax", "edx", "edi")

// the old code... swapped it
//     movl %%edx,(%%edi)
//     movl %%eax,4(%%edi)"
#define RDMSR(_msri, _msrd) \
__asm__("
     .byte 0x0F,0x32
     movl %%eax,(%%edi)
     movl %%edx,4(%%edi)"\
: : "c" (_msri), "D" (_msrd) : "eax", "ecx", "edx", "edi")

#define WRMSR(_msri, _msrd) \
__asm__("
     xorl %%edx,%%edx
     .byte 0x0F,0x30"\
: : "c" (_msri), "a" (_msrd) : "eax", "ecx", "edx")

#define RDMSR_0x12_0x13(_msr12, _msr13) \
__asm__("
     movl $0x12,%%ecx
     .byte 0x0F,0x32
     movl %%edx,(%%edi)
     movl %%eax,4(%%edi)
     movl $0x13,%%ecx
     .byte 0x0F,0x32
     movl %%edx,(%%esi)
     movl %%eax,4(%%esi)"\
: : "D" (_msr12), "S" (_msr13) : "eax", "ecx", "edx", "edi")

#define ZERO_MSR_0x12_0x13() \
__asm__("
     xorl %%edx,%%edx
     xorl %%eax,%%eax
     movl $0x12,%%ecx
     .byte 0x0F,0x30
     movl $0x13,%%ecx
     .byte 0x0F,0x30"\
: : : "eax", "ecx", "edx")

#elif defined(__WATCOMC__)

extern void RDTSC(unsigned int *dst);
#pragma aux RDTSC =\
   "db 0x0F,0x31"\
   "mov [edi],edx"\
   "mov [4+edi],eax"\
   parm [edi]\
   modify [eax edx edi];

extern void RDMSR(unsigned int msri, unsigned int *msrd);
#pragma aux RDMSR =\
   "db 0x0F,0x32"\
   "mov [edi],edx"\
   "mov [4+edi],eax"\
   parm [ecx] [edi]\
   modify [eax ecx edx edi];

extern void WRMSR(unsigned int msri, unsigned int msrd);
#pragma aux WRMSR =\
   "xor edx,edx"\
   "db 0x0F,0x30"\
   parm [ecx] [eax]\
   modify [eax ecx edx];

extern void RDMSR_0x12_0x13(unsigned int *msr12, unsigned int *msr13);
#pragma aux RDMSR_0x12_0x13 =\
   "mov ecx,0x12"\
   "db 0x0F,0x32"\
   "mov [edi],edx"\
   "mov [4+edi],eax"\
   "mov ecx,0x13"\
   "db 0x0F,0x32"\
   "mov [esi],edx"\
   "mov [4+esi],eax"\
   parm [edi] [esi]\
   modify [eax ecx edx edi esi];

extern void ZERO_MSR_0x12_0x13(void);
#pragma aux ZERO_MSR_0x12_0x13 =\
   "xor edx,edx"\
   "xor eax,eax"\
   "mov ecx,0x12"\
   "db 0x0F,0x30"\
   "mov ecx,0x13"\
   "db 0x0F,0x30"\
   modify [eax ecx edx];

#endif

enum
{
   DataRead,
     DataWrite,
     DataTLBMiss,
     DataReadMiss,
     DataWriteMiss,
     WriteHitEM,
     DataCacheLinesWritten,
     DataCacheSnoops,
     DataCacheSnoopHit,
     MemAccessBothPipes,
     BankConflict,
     MisalignedDataRef,
     CodeRead,
     CodeTLBMiss,
     CodeCacheMiss,
     SegRegLoad,
     RESERVED0,
     RESERVED1,
     Branch,
     BTBHit,
     TakenBranchOrBTBHit,
     PipelineFlush,
     InstructionsExeced,
     InstructionsExecedVPipe,
     BusUtilizationClocks,
     PipelineStalledWriteBackup,
     PipelineStalledDateMemRead,
     PipeLineStalledWriteEM,
     LockedBusCycle,
     IOReadOrWriteCycle,
     NonCacheableMemRef,
     AGI,
     RESERVED2,
     RESERVED3,
     FPOperation,
     Breakpoint0Match,
     Breakpoint1Match,
     Breakpoint2Match,
     Breakpoint3Match,
     HWInterrupt,
     DataReadOrWrite,
     DataReadOrWriteMiss
};

#define PROF_CYCLES (0x100)
#define PROF_EVENTS (0x000)
#define RING_012    (0x40)
#define RING_3      (0x80)
#define RING_0123   (RING_012 | RING_3)

/*void ProfSetProfiles(unsigned int msr12, unsigned int msr13);*/
#define ProfSetProfiles(_msr12, _msr13)\
{\
   unsigned int prof;\
\
   prof = (_msr12) | ((_msr13) << 16);\
   WRMSR(0x11, prof);\
}

/*void ProfBeginProfiles(void);*/
#define ProfBeginProfiles()\
   ZERO_MSR_0x12_0x13();

/*void ProfGetProfiles(unsigned int msr12[2], unsigned int msr13[2]);*/
#define ProfGetProfiles(_msr12, _msr13)\
   RDMSR_0x12_0x13(_msr12, _msr13);

/*void ProfZeroTimer(void);*/
#define ProfZeroTimer()\
   WRMSR(0x10, 0);

/*void ProfReadTimer(unsigned int timer[2]);*/
#define ProfReadTimer(timer)\
   RDMSR(0x10, timer);

/*EOF*/