linux-IOunit.c File Reference

This file has the source code for a component that enables PAPI-C to access hardware monitoring counters for BG/Q through the bgpm library. More...

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Functions
void	user_signal_handler_IOUNIT (int hEvtSet, uint64_t address, uint64_t ovfVector, const ucontext_t *pContext)
int	IOUNIT_init_thread (hwd_context_t *ctx)
int	IOUNIT_init_component (int cidx)
int	IOUNIT_init_control_state (hwd_control_state_t *ptr)
int	IOUNIT_start (hwd_context_t *ctx, hwd_control_state_t *ptr)
int	IOUNIT_stop (hwd_context_t *ctx, hwd_control_state_t *ptr)
int	IOUNIT_read (hwd_context_t *ctx, hwd_control_state_t *ptr, long_long **events, int flags)
int	IOUNIT_shutdown_thread (hwd_context_t *ctx)
int	IOUNIT_set_overflow (EventSetInfo_t *ESI, int EventIndex, int threshold)
int	IOUNIT_ctl (hwd_context_t *ctx, int code, _papi_int_option_t *option)
int	IOUNIT_update_control_state (hwd_control_state_t *ptr, NativeInfo_t *native, int count, hwd_context_t *ctx)
int	IOUNIT_set_domain (hwd_control_state_t *cntrl, int domain)
int	IOUNIT_reset (hwd_context_t *ctx, hwd_control_state_t *ptr)
int	IOUNIT_cleanup_eventset (hwd_control_state_t *ctrl)
int	IOUNIT_ntv_enum_events (unsigned int *EventCode, int modifier)
int	IOUNIT_ntv_name_to_code (const char *name, unsigned int *event_code)
int	IOUNIT_ntv_code_to_name (unsigned int EventCode, char *name, int len)
int	IOUNIT_ntv_code_to_descr (unsigned int EventCode, char *name, int len)
int	IOUNIT_ntv_code_to_bits (unsigned int EventCode, hwd_register_t *bits)

Variables
papi_vector_t	_IOunit_vector

Detailed Description

Author

Heike Jagode jagod.nosp@m.e@ee.nosp@m.cs.ut.nosp@m.k.ed.nosp@m.u Mods: < your name here > < your email address > BGPM / IOunit component

Tested version of bgpm (early access)

Definition in file linux-IOunit.c.

Function Documentation

IOUNIT_cleanup_eventset()

int IOUNIT_cleanup_eventset

(

hwd_control_state_t *

ctrl

)

Definition at line 471 of file linux-IOunit.c.

{
#ifdef DEBUG_BGQ
    printf( "IOUNIT_cleanup_eventset\n" );
#endif
    int retval;

    IOUNIT_control_state_t * this_state = ( IOUNIT_control_state_t * ) ctrl;
        
    // create a new empty bgpm eventset
    // reason: bgpm doesn't permit to remove events from an eventset; 
    // hence we delete the old eventset and create a new one
    retval = _common_deleteRecreate( &this_state->EventGroup ); // HJ try to use delete() only
    if ( retval < 0 ) return retval;

    // set overflow flag to OFF (0)
    this_state->overflow = 0;
    this_state->overflow_count = 0;
    
    return ( PAPI_OK );
}

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IOUNIT_ctl()

int IOUNIT_ctl	(	hwd_context_t *	ctx,
		int	code,
		_papi_int_option_t *	option
	)

Definition at line 332 of file linux-IOunit.c.

{
#ifdef DEBUG_BGQ
    printf( "IOUNIT_ctl\n" );
#endif
    
    ( void ) ctx;
    ( void ) code;
    ( void ) option;
    return ( PAPI_OK );
}

IOUNIT_init_component()

int IOUNIT_init_component

(

int

cidx

)

Definition at line 52 of file linux-IOunit.c.

{  
#ifdef DEBUG_BGQ
    printf( "IOUNIT_init_component\n" );
#endif

    _IOunit_vector.cmp_info.CmpIdx = cidx;
#ifdef DEBUG_BGQ
    printf( "IOUNIT_init_component cidx = %d\n", cidx );
#endif
    
    return ( PAPI_OK );
}

IOUNIT_init_control_state()

int IOUNIT_init_control_state

(

hwd_control_state_t *

ptr

)

Definition at line 72 of file linux-IOunit.c.

{
#ifdef DEBUG_BGQ
    printf( "IOUNIT_init_control_state\n" );
#endif
    int retval;

    IOUNIT_control_state_t * this_state = ( IOUNIT_control_state_t * ) ptr;
    
    this_state->EventGroup = Bgpm_CreateEventSet();
    retval = _check_BGPM_error( this_state->EventGroup, "Bgpm_CreateEventSet" );
    if ( retval < 0 ) return retval;

    // initialize overflow flag to OFF (0)
    this_state->overflow = 0;
    this_state->overflow_count = 0;
    
    return PAPI_OK;
}

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IOUNIT_init_thread()

int IOUNIT_init_thread

(

hwd_context_t *

ctx

)

Definition at line 36 of file linux-IOunit.c.

{
#ifdef DEBUG_BGQ
    printf( "IOUNIT_init_thread\n" );
#endif
    
    ( void ) ctx;
    return PAPI_OK;
}

IOUNIT_ntv_code_to_bits()

int IOUNIT_ntv_code_to_bits	(	unsigned int	EventCode,
		hwd_register_t *	bits
	)

Definition at line 614 of file linux-IOunit.c.

{
#ifdef DEBUG_BGQ
    printf( "IOUNIT_ntv_code_to_bits\n" );
#endif
    ( void ) EventCode;
    ( void ) bits;
    return ( PAPI_OK );
}

IOUNIT_ntv_code_to_descr()

int IOUNIT_ntv_code_to_descr	(	unsigned int	EventCode,
		char *	name,
		int	len
	)

Definition at line 593 of file linux-IOunit.c.

{
#ifdef DEBUG_BGQ
    //printf( "IOUNIT_ntv_code_to_descr\n" );
#endif  
    int retval, index;
    
    index = ( EventCode ) + OFFSET;
    
    retval = Bgpm_GetLongDesc( index, name, &len );
    retval = _check_BGPM_error( retval, "Bgpm_GetLongDesc" );                        
    if ( retval < 0 ) return retval;

    return ( PAPI_OK );
}

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IOUNIT_ntv_code_to_name()

int IOUNIT_ntv_code_to_name	(	unsigned int	EventCode,
		char *	name,
		int	len
	)

Definition at line 564 of file linux-IOunit.c.

{
#ifdef DEBUG_BGQ
    //printf( "IOUNIT_ntv_code_to_name\n" );
#endif
    int index;
    
    index = ( EventCode ) + OFFSET;

    if ( index >= MAX_COUNTERS )
        return PAPI_ENOEVNT;

    strncpy( name, Bgpm_GetEventIdLabel( index ), len );
    
    if ( name == NULL ) {
#ifdef DEBUG_BGPM
        printf ("Error: ret value is NULL for BGPM API function Bgpm_GetEventIdLabel.\n" );
#endif
        return PAPI_ENOEVNT;
    }
    
    return ( PAPI_OK );
}

IOUNIT_ntv_enum_events()

int IOUNIT_ntv_enum_events	(	unsigned int *	EventCode,
		int	modifier
	)

Definition at line 498 of file linux-IOunit.c.

{
#ifdef DEBUG_BGQ
    //printf( "IOUNIT_ntv_enum_events\n" );
#endif

    switch ( modifier ) {
    case PAPI_ENUM_FIRST:
        *EventCode = 0;

        return ( PAPI_OK );
        break;

    case PAPI_ENUM_EVENTS:
    {
        int index = ( *EventCode ) + OFFSET;

        if ( index < IOUNIT_MAX_EVENTS ) {
            *EventCode = *EventCode + 1;
            return ( PAPI_OK );
        } else
            return ( PAPI_ENOEVNT );

        break;
    }
    default:
        return ( PAPI_EINVAL );
    }
    return ( PAPI_EINVAL );
}

IOUNIT_ntv_name_to_code()

int IOUNIT_ntv_name_to_code	(	const char *	name,
		unsigned int *	event_code
	)

Definition at line 534 of file linux-IOunit.c.

{
#ifdef DEBUG_BGQ
    printf( "IOUNIT_ntv_name_to_code\n" );
#endif
    int ret;
    
    /* Return event id matching a given event label string */
    ret = Bgpm_GetEventIdFromLabel ( name );
    
    if ( ret <= 0 ) {
#ifdef DEBUG_BGPM
        printf ("Error: ret value is %d for BGPM API function '%s'.\n",
                ret, "Bgpm_GetEventIdFromLabel" );
#endif
        return PAPI_ENOEVNT;
    }
    else if ( ret < OFFSET || ret > IOUNIT_MAX_EVENTS ) // not an IOUnit event
        return PAPI_ENOEVNT;
    else
        *event_code = ( ret - OFFSET ) ;
    
    return PAPI_OK;
}

IOUNIT_read()

int IOUNIT_read	(	hwd_context_t *	ctx,
		hwd_control_state_t *	ptr,
		long_long **	events,
		int	flags
	)

Definition at line 139 of file linux-IOunit.c.

{
#ifdef DEBUG_BGQ
    printf( "IOUNIT_read\n" );
#endif
    ( void ) ctx;
    ( void ) flags;
    int i, numEvts;
    IOUNIT_control_state_t * this_state = ( IOUNIT_control_state_t * ) ptr;

    numEvts = Bgpm_NumEvents( this_state->EventGroup );
    if ( numEvts == 0 ) {
#ifdef DEBUG_BGPM
        printf ("Error: ret value is %d for BGPM API function Bgpm_NumEvents.\n", numEvts );
#endif
        //return ( EXIT_FAILURE );
    }
        
    for ( i = 0; i < numEvts; i++ )
        this_state->counts[i] = _common_getEventValue( i, this_state->EventGroup );

    *events = this_state->counts;
    
    return ( PAPI_OK );
}

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IOUNIT_reset()

int IOUNIT_reset	(	hwd_context_t *	ctx,
		hwd_control_state_t *	ptr
	)

Definition at line 440 of file linux-IOunit.c.

{
#ifdef DEBUG_BGQ
    printf( "IOUNIT_reset\n" );
#endif
    ( void ) ctx;
    int retval;
    IOUNIT_control_state_t * this_state = ( IOUNIT_control_state_t * ) ptr;

    /* we can't simply call Bgpm_Reset() since PAPI doesn't have the 
     restriction that an EventSet has to be stopped before resetting is
     possible. However, BGPM does have this restriction. 
     Hence we need to stop, reset and start */
    retval = Bgpm_Stop( this_state->EventGroup );
    retval = _check_BGPM_error( retval, "Bgpm_Stop" );
    if ( retval < 0 ) return retval;

    retval = Bgpm_ResetStart( this_state->EventGroup );
    retval = _check_BGPM_error( retval, "Bgpm_ResetStart" );
    if ( retval < 0 ) return retval;

    return ( PAPI_OK );
}

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IOUNIT_set_domain()

int IOUNIT_set_domain	(	hwd_control_state_t *	cntrl,
		int	domain
	)

Definition at line 412 of file linux-IOunit.c.

{
#ifdef DEBUG_BGQ
    printf( "IOUNIT_set_domain\n" );
#endif
    int found = 0;
    ( void ) cntrl;

    if ( PAPI_DOM_USER & domain )
        found = 1;

    if ( PAPI_DOM_KERNEL & domain )
        found = 1;

    if ( PAPI_DOM_OTHER & domain )
        found = 1;

    if ( !found )
        return ( PAPI_EINVAL );

    return ( PAPI_OK );
}

IOUNIT_set_overflow()

int IOUNIT_set_overflow	(	EventSetInfo_t *	ESI,
		int	EventIndex,
		int	threshold
	)

Definition at line 277 of file linux-IOunit.c.

{
#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;
        
    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 {
        this_state->overflow = 1;
        this_state->overflow_count++;
        this_state->overflow_list[this_state->overflow_count-1].threshold = threshold;
        this_state->overflow_list[this_state->overflow_count-1].EventIndex = evt_idx;
        
#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 = _common_set_overflow_BGPM( this_state->EventGroup,
                                  this_state->overflow_list[this_state->overflow_count-1].EventIndex,
                                  this_state->overflow_list[this_state->overflow_count-1].threshold,
                                  user_signal_handler_IOUNIT );
        if ( retval < 0 ) return retval;
    }
    
    return ( PAPI_OK );
}

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IOUNIT_shutdown_thread()

int IOUNIT_shutdown_thread

(

hwd_context_t *

ctx

)

Definition at line 171 of file linux-IOunit.c.

{
#ifdef DEBUG_BGQ
    printf( "IOUNIT_shutdown_thread\n" );
#endif
    
    ( void ) ctx;
    return ( PAPI_OK );
}

IOUNIT_start()

int IOUNIT_start	(	hwd_context_t *	ctx,
		hwd_control_state_t *	ptr
	)

Definition at line 97 of file linux-IOunit.c.

{
#ifdef DEBUG_BGQ
    printf( "IOUNIT_start\n" );
#endif
    ( void ) ctx;
    int retval;
    IOUNIT_control_state_t * this_state = ( IOUNIT_control_state_t * ) ptr;
    
    retval = Bgpm_ResetStart( this_state->EventGroup );
    retval = _check_BGPM_error( retval, "Bgpm_ResetStart" );
    if ( retval < 0 ) return retval;

    return ( PAPI_OK );
}

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IOUNIT_stop()

int IOUNIT_stop	(	hwd_context_t *	ctx,
		hwd_control_state_t *	ptr
	)

Definition at line 118 of file linux-IOunit.c.

{
#ifdef DEBUG_BGQ
    printf( "IOUNIT_stop\n" );
#endif
    ( void ) ctx;
    int retval;
    IOUNIT_control_state_t * this_state = ( IOUNIT_control_state_t * ) ptr;
    
    retval = Bgpm_Stop( this_state->EventGroup );
    retval = _check_BGPM_error( retval, "Bgpm_Stop" );
    if ( retval < 0 ) return retval;

    return ( PAPI_OK );
}

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IOUNIT_update_control_state()

int IOUNIT_update_control_state	(	hwd_control_state_t *	ptr,
		NativeInfo_t *	native,
		int	count,
		hwd_context_t *	ctx
	)

Definition at line 349 of file linux-IOunit.c.

{
#ifdef DEBUG_BGQ
    printf( "IOUNIT_update_control_state: count = %d\n", count );
#endif
    ( void ) ctx;
    int retval, index, i, k;
    IOUNIT_control_state_t * this_state = ( IOUNIT_control_state_t * ) ptr;
    
    // Delete and re-create BGPM eventset
    retval = _common_deleteRecreate( &this_state->EventGroup );
    if ( retval < 0 ) return retval;

#ifdef DEBUG_BGQ
    printf( "IOUNIT_update_control_state: EventGroup=%d, overflow = %d\n",
           this_state->EventGroup, this_state->overflow );
#endif
        
    // otherwise, add the events to the eventset
    for ( i = 0; i < count; i++ ) {
        index = ( native[i].ni_event ) + OFFSET;
        
        native[i].ni_position = i;

#ifdef DEBUG_BGQ
        printf("IOUNIT_update_control_state: ADD event: i = %d, index = %d\n", i, index );
#endif
                
        /* Add events to the BGPM eventGroup */
        retval = Bgpm_AddEvent( this_state->EventGroup, index );
        retval = _check_BGPM_error( retval, "Bgpm_AddEvent" );
        if ( retval < 0 ) return retval;
    }

    // since update_control_state trashes overflow settings, this puts things
    // back into balance for BGPM
    if ( 1 == this_state->overflow ) {
        for ( k = 0; k < this_state->overflow_count; k++ ) {
            retval = _common_set_overflow_BGPM( this_state->EventGroup,
                                      this_state->overflow_list[k].EventIndex,
                                      this_state->overflow_list[k].threshold,
                                      user_signal_handler_IOUNIT );
            if ( retval < 0 ) return retval;
        }
    }

    return ( PAPI_OK );
}

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user_signal_handler_IOUNIT()

void user_signal_handler_IOUNIT	(	int	hEvtSet,
		uint64_t	address,
		uint64_t	ovfVector,
		const ucontext_t *	pContext
	)

Definition at line 189 of file linux-IOunit.c.

{
#ifdef DEBUG_BGQ
    printf( "user_signal_handler_IOUNIT\n" );
#endif
    ( void ) address;
    int retval;
    unsigned i;
    int isHardware = 1;
    int cidx = _IOunit_vector.cmp_info.CmpIdx;
    long_long overflow_bit = 0;
    caddr_t address1;
    _papi_hwi_context_t ctx;
    ctx.ucontext = ( hwd_ucontext_t * ) pContext;
    ThreadInfo_t *thread = _papi_hwi_lookup_thread( 0 );
    EventSetInfo_t *ESI;
    ESI = thread->running_eventset[cidx];
    // Get the indices of all events which have overflowed.
    unsigned ovfIdxs[BGPM_MAX_OVERFLOW_EVENTS];
    unsigned len = BGPM_MAX_OVERFLOW_EVENTS;
    
    retval = Bgpm_GetOverflowEventIndices( hEvtSet, ovfVector, ovfIdxs, &len );
    if ( retval < 0 ) {
#ifdef DEBUG_BGPM
        printf ( "Error: ret value is %d for BGPM API function Bgpm_GetOverflowEventIndices.\n", 
                retval ); 
#endif
        return;
    }
    
    if ( thread == NULL ) {
        PAPIERROR( "thread == NULL in user_signal_handler!" );
        return;
    }
    
    if ( ESI == NULL ) {
        PAPIERROR( "ESI == NULL in user_signal_handler!");
        return;
    }
    
    if ( ESI->overflow.flags == 0 ) {
        PAPIERROR( "ESI->overflow.flags == 0 in user_signal_handler!");
        return;
    }
    
    for ( i = 0; i < len; i++ ) {
        uint64_t hProf;
        Bgpm_GetEventUser1( hEvtSet, ovfIdxs[i], &hProf );
        if ( hProf ) {
            overflow_bit ^= 1 << ovfIdxs[i];
            break;
        }
        
    }
    
    if ( ESI->overflow.flags & PAPI_OVERFLOW_FORCE_SW ) {
#ifdef DEBUG_BGQ
        printf("OVERFLOW_SOFTWARE\n");
#endif
        address1 = GET_OVERFLOW_ADDRESS( ctx );
        _papi_hwi_dispatch_overflow_signal( ( void * ) &ctx, address1, NULL, 0, 0, &thread, cidx );
        return;
    }
    else if ( ESI->overflow.flags & PAPI_OVERFLOW_HARDWARE ) {
#ifdef DEBUG_BGQ
        printf("OVERFLOW_HARDWARE\n");
#endif
        address1 = GET_OVERFLOW_ADDRESS( ctx );
        _papi_hwi_dispatch_overflow_signal( ( void * ) &ctx, address1, &isHardware, overflow_bit, 0, &thread, cidx );
    }
    else {
#ifdef DEBUG_BGQ
        printf("OVERFLOW_NONE\n");
#endif
        PAPIERROR( "ESI->overflow.flags is set to something other than PAPI_OVERFLOW_HARDWARE or PAPI_OVERFLOW_FORCE_SW (%#x)", thread->running_eventset[cidx]->overflow.flags);
    }
}

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Variable Documentation

_IOunit_vector

papi_vector_t _IOunit_vector

Definition at line 23 of file linux-IOunit.c.