/*
* Set Overflow
*
* This is commented out in BG/L/P - need to explore and complete...
* However, with true 64-bit counters in BG/Q and all counters for PAPI
* always starting from a true zero (we don't allow write...), the possibility
* for overflow is remote at best...
*/
int
IOUNIT_set_overflow( EventSetInfo_t * ESI, int EventIndex, int threshold )
{
#ifdef DEBUG_BGQ
printf("BEGIN IOUNIT_set_overflow\n");
#endif
IOUNIT_control_state_t * this_state = ( IOUNIT_control_state_t * ) ESI->ctl_state;
int retval;
int evt_idx;
uint64_t threshold_for_bgpm;
/* convert threadhold value assigned by PAPI user to value that is
* programmed into the counter. This value is required by Bgpm_SetOverflow() */
threshold_for_bgpm = BGPM_PERIOD2THRES( threshold );
evt_idx = ESI->EventInfoArray[EventIndex].pos[0];
SUBDBG( "Hardware counter %d (vs %d) used in overflow, threshold %d\n",
evt_idx, EventIndex, threshold );
#ifdef DEBUG_BGQ
printf( "Hardware counter %d (vs %d) used in overflow, threshold %d\n",
evt_idx, EventIndex, threshold );
#endif
/* If this counter isn't set to overflow, it's an error */
if ( threshold == 0 ) {
/* Remove the signal handler */
retval = _papi_hwi_stop_signal( _IOunit_vector.cmp_info.hardware_intr_sig );
if ( retval != PAPI_OK )
return ( retval );
}
else {
#ifdef DEBUG_BGQ
printf( "IOUNIT_set_overflow: Enable the signal handler\n" );
#endif
/* Enable the signal handler */
retval = _papi_hwi_start_signal( _IOunit_vector.cmp_info.hardware_intr_sig,
NEED_CONTEXT,
_IOunit_vector.cmp_info.CmpIdx );
if ( retval != PAPI_OK )
return ( retval );
retval = Bgpm_SetOverflow( this_state->EventGroup,
evt_idx,
threshold_for_bgpm );
CHECK_BGPM_ERROR( retval, "Bgpm_SetOverflow" );
retval = Bgpm_SetEventUser1( this_state->EventGroup,
evt_idx,
1024 );
CHECK_BGPM_ERROR( retval, "Bgpm_SetEventUser1" );
/* user signal handler for overflow case */
retval = Bgpm_SetOverflowHandler( this_state->EventGroup, user_signal_handler_IOUNIT );
CHECK_BGPM_ERROR( retval, "Bgpm_SetOverflowHandler" );
}
return ( PAPI_OK );
}
/*
* _common_set_overflow_BGPM
*
* since update_control_state trashes overflow settings, this puts things
* back into balance for BGPM
*/
int
_common_set_overflow_BGPM( int EventGroup,
int evt_idx,
int threshold,
void (*handler)(int, uint64_t, uint64_t, const ucontext_t *) )
{
int retval;
uint64_t threshold_for_bgpm;
/* convert threadhold value assigned by PAPI user to value that is
* programmed into the counter. This value is required by Bgpm_SetOverflow() */
threshold_for_bgpm = BGPM_PERIOD2THRES( threshold );
#ifdef DEBUG_BGQ
printf("_common_set_overflow_BGPM\n");
int i;
int numEvts = Bgpm_NumEvents( EventGroup );
for ( i = 0; i < numEvts; i++ ) {
printf("_common_set_overflow_BGPM: %d = %s\n", i, Bgpm_GetEventLabel( EventGroup, i) );
}
#endif
retval = Bgpm_SetOverflow( EventGroup,
evt_idx,
threshold_for_bgpm );
retval = _check_BGPM_error( retval, "Bgpm_SetOverflow" );
if ( retval < 0 ) return retval;
retval = Bgpm_SetEventUser1( EventGroup,
evt_idx,
1024 );
retval = _check_BGPM_error( retval, "Bgpm_SetEventUser1" );
if ( retval < 0 ) return retval;
/* user signal handler for overflow case */
retval = Bgpm_SetOverflowHandler( EventGroup,
handler );
retval = _check_BGPM_error( retval, "Bgpm_SetOverflowHandler" );
if ( retval < 0 ) return retval;
return PAPI_OK;
}
