static int
_x86_start( hwd_context_t * ctx, hwd_control_state_t * state )
{
int error;
#ifdef DEBUG
print_control( &state->control.cpu_control );
#endif
if ( state->rvperfctr != NULL ) {
if ( ( error =
rvperfctr_control( state->rvperfctr, &state->control ) ) < 0 ) {
SUBDBG( "rvperfctr_control returns: %d\n", error );
PAPIERROR( RCNTRL_ERROR );
return ( PAPI_ESYS );
}
return ( PAPI_OK );
}
if ( ( error = vperfctr_control( ctx->perfctr, &state->control ) ) < 0 ) {
SUBDBG( "vperfctr_control returns: %d\n", error );
PAPIERROR( VCNTRL_ERROR );
return ( PAPI_ESYS );
}
return ( PAPI_OK );
}
int
_perfctr_init( hwd_context_t * ctx )
{
struct vperfctr_control tmp;
int error;
/* Initialize our thread/process pointer. */
if ( ( ctx->perfctr = vperfctr_open( ) ) == NULL ) {
#ifdef VPERFCTR_OPEN_CREAT_EXCL
/* New versions of perfctr have this, which allows us to
get a previously created context, i.e. one created after
a fork and now we're inside a new process that has been exec'd */
if ( errno ) {
if ( ( ctx->perfctr = vperfctr_open_mode( 0 ) ) == NULL ) {
PAPIERROR( VOPEN_ERROR );
return ( PAPI_ESYS );
}
} else {
PAPIERROR( VOPEN_ERROR );
return ( PAPI_ESYS );
}
#else
PAPIERROR( VOPEN_ERROR );
return ( PAPI_ESYS );
#endif
}
SUBDBG( "_papi_hwd_init vperfctr_open() = %p\n", ctx->perfctr );
/* Initialize the per thread/process virtualized TSC */
memset( &tmp, 0x0, sizeof ( tmp ) );
tmp.cpu_control.tsc_on = 1;
#ifdef VPERFCTR_CONTROL_CLOEXEC
tmp.flags = VPERFCTR_CONTROL_CLOEXEC;
SUBDBG( "close on exec\t\t\t%u\n", tmp.flags );
#endif
/* Start the per thread/process virtualized TSC */
error = vperfctr_control( ctx->perfctr, &tmp );
if ( error < 0 ) {
SUBDBG( "starting virtualized TSC; vperfctr_control returns %d\n",
error );
PAPIERROR( VCNTRL_ERROR );
return ( PAPI_ESYS );
}
return ( PAPI_OK );
}
int
_papi_hwd_start( hwd_context_t * ctx, hwd_control_state_t * state )
{
int error;
/* clear_unused_pmcsel_bits(this_state); moved to update_control_state */
#ifdef DEBUG
print_control( &state->control.cpu_control );
#endif
if ( state->rvperfctr != NULL ) {
if ( ( error =
rvperfctr_control( state->rvperfctr, &state->control ) ) < 0 ) {
SUBDBG( "rvperfctr_control returns: %d\n", error );
PAPIERROR( RCNTRL_ERROR );
return ( PAPI_ESYS );
}
return ( PAPI_OK );
}
if ( ( error = vperfctr_control( ctx->perfctr, &state->control ) ) < 0 ) {
SUBDBG( "vperfctr_control returns: %d\n", error );
PAPIERROR( VCNTRL_ERROR );
return ( PAPI_ESYS );
}
return ( PAPI_OK );
}
static void init_perfctr() {
unsigned int tsc_on = 1;
unsigned int nractrs = 1;
unsigned int pmc_map0 = 0;
unsigned int evntsel0 = 0;
self = vperfctr_open();
clock_perfctr = self;
if( !self ) {
char *str = "vperfctr_open() failed!!\n";
syscall(SYS_write, 2, str, strlen(str));
exit(1);
}
if( vperfctr_info(clock_perfctr, &info) < 0 ) {
char *str = "vperfctr_info() failed!!\n";
syscall(SYS_write, 2, str, strlen(str));
exit(1);
}
memset(&control, 0, sizeof control);
/* Attempt to set up control to count clocks via the TSC
and retired instructions via PMC0. */
switch( info.cpu_type ) {
case PERFCTR_X86_GENERIC:
nractrs = 0; /* no PMCs available */
break;
case PERFCTR_X86_INTEL_P5:
case PERFCTR_X86_INTEL_P5MMX:
case PERFCTR_X86_CYRIX_MII:
/* event 0x16 (INSTRUCTIONS_EXECUTED), count at CPL 3 */
evntsel0 = 0x16 | (2 << 6);
break;
case PERFCTR_X86_INTEL_P6:
case PERFCTR_X86_INTEL_PII:
case PERFCTR_X86_INTEL_PIII:
case PERFCTR_X86_AMD_K7:
case PERFCTR_X86_AMD_K8:
/* event 0xC0 (INST_RETIRED), count at CPL > 0, Enable */
evntsel0 = 0xC0 | (1 << 16) | (1 << 22);
break;
case PERFCTR_X86_WINCHIP_C6:
tsc_on = 0; /* no working TSC available */
evntsel0 = 0x02; /* X86_INSTRUCTIONS */
break;
case PERFCTR_X86_WINCHIP_2:
tsc_on = 0; /* no working TSC available */
evntsel0 = 0x16; /* INSTRUCTIONS_EXECUTED */
break;
case PERFCTR_X86_VIA_C3:
pmc_map0 = 1; /* redirect PMC0 to PERFCTR1 */
evntsel0 = 0xC0; /* INSTRUCTIONS_EXECUTED */
break;
case PERFCTR_X86_INTEL_P4:
case PERFCTR_X86_INTEL_P4M2:
/* PMC0: IQ_COUNTER0 with fast RDPMC */
pmc_map0 = 0x0C | (1 << 31);
/* IQ_CCCR0: required flags, ESCR 4 (CRU_ESCR0), Enable */
evntsel0 = (0x3 << 16) | (4 << 13) | (1 << 12);
/* CRU_ESCR0: event 2 (instr_retired), NBOGUSNTAG, CPL>0 */
control.cpu_control.p4.escr[0] = (2 << 25) | (1 << 9) | (1 << 2);
break;
default: {
char *str = "cpu type not supported - perfctr init failed!!\n";
syscall(SYS_write, 2, str, strlen(str));
exit(1);
}
}
control.cpu_control.tsc_on = tsc_on;
control.cpu_control.nractrs = nractrs;
control.cpu_control.pmc_map[0] = pmc_map0;
control.cpu_control.evntsel[0] = evntsel0;
if (!nractrs) {
//output("error: your CPU (%s) doesn't support PMC timing\n", perfctr_info_cpu_name(&info));
char *str = "error: your CPU doesn't support PMC timing\n";
syscall(SYS_write, 2, str, strlen(str));
exit(1);
}
// start the perfctr
if( vperfctr_control(clock_perfctr, &control) < 0 ) {
char *str = "vperfctr_control failed!!!\n";
syscall(SYS_write, 2, str, strlen(str));
exit(1);
}
}
