linux-NWunit.c

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/****************************/
/* THIS IS OPEN SOURCE CODE */
/****************************/

#include "linux-NWunit.h"

/* Declare our vector in advance */
papi_vector_t _NWunit_vector;

/*****************************************************************************
 *******************  BEGIN PAPI's COMPONENT REQUIRED FUNCTIONS  *************
 *****************************************************************************/

/*
 * This is called whenever a thread is initialized
 */
int
NWUNIT_init_thread( hwd_context_t * ctx )
{
#ifdef DEBUG_BGQ
    printf( "NWUNIT_init_thread\n" );
#endif
    
    ( void ) ctx;
    return PAPI_OK;
}


/* Initialize hardware counters, setup the function vector table
 * and get hardware information, this routine is called when the 
 * PAPI process is initialized (IE PAPI_library_init)
 */
int
NWUNIT_init_component( int cidx )
{  
#ifdef DEBUG_BGQ
    printf( "NWUNIT_init_component\n" );
#endif

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


/*
 * Control of counters (Reading/Writing/Starting/Stopping/Setup)
 * functions
 */
int
NWUNIT_init_control_state( hwd_control_state_t * ptr )
{
#ifdef DEBUG_BGQ
    printf( "NWUNIT_init_control_state\n" );
#endif
    
    NWUNIT_control_state_t * this_state = ( NWUNIT_control_state_t * ) ptr;
    
    this_state->EventGroup = Bgpm_CreateEventSet();
    CHECK_BGPM_ERROR( this_state->EventGroup, "Bgpm_CreateEventSet" );
    
    return PAPI_OK;
}


/*
 *
 */
int
NWUNIT_start( hwd_context_t * ctx, hwd_control_state_t * ptr )
{
#ifdef DEBUG_BGQ
    printf( "NWUNIT_start\n" );
#endif
    
    ( void ) ctx;
    int retval;
    NWUNIT_control_state_t * this_state = ( NWUNIT_control_state_t * ) ptr;
    
    retval = Bgpm_Attach( this_state->EventGroup, 
                          UPC_NW_ALL_LINKS, 
                          ( uint64_t ) ( this_state->AttachedEventGroup ) ); 
    CHECK_BGPM_ERROR( retval, "Bgpm_Attach" );

    retval = Bgpm_ResetStart( this_state->AttachedEventGroup );
    CHECK_BGPM_ERROR( retval, "Bgpm_ResetStart" );
    
    return ( PAPI_OK );
}


/*
 *
 */
int
NWUNIT_stop( hwd_context_t * ctx, hwd_control_state_t * ptr )
{
#ifdef DEBUG_BGQ
    printf( "NWUNIT_stop\n" );
#endif
    ( void ) ctx;
    int retval;
    NWUNIT_control_state_t * this_state = ( NWUNIT_control_state_t * ) ptr;
    
    retval = Bgpm_Stop( this_state->AttachedEventGroup );
    CHECK_BGPM_ERROR( retval, "Bgpm_Stop" );
    
    return ( PAPI_OK );
}


/*
 *
 */
int
NWUNIT_read( hwd_context_t * ctx, hwd_control_state_t * ptr,
           long_long ** events, int flags )
{
#ifdef DEBUG_BGQ
    printf( "NWUNIT_read\n" );
#endif
    ( void ) ctx;
    ( void ) flags;
    int i, numEvts;
    NWUNIT_control_state_t * this_state = ( NWUNIT_control_state_t * ) ptr;
    
    numEvts = Bgpm_NumEvents( this_state->AttachedEventGroup );
    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->AttachedEventGroup );

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


/*
 *
 */
int
NWUNIT_shutdown_thread( hwd_context_t * ctx )
{
#ifdef DEBUG_BGQ
    printf( "NWUNIT_shutdown_thread\n" );
#endif
    
    ( void ) ctx;
    return ( PAPI_OK );
}


/* This function sets various options in the component
 * The valid codes being passed in are PAPI_SET_DEFDOM,
 * PAPI_SET_DOMAIN, PAPI_SETDEFGRN, PAPI_SET_GRANUL * and PAPI_SET_INHERIT
 */
int
NWUNIT_ctl( hwd_context_t * ctx, int code, _papi_int_option_t * option )
{
#ifdef DEBUG_BGQ
    printf( "NWUNIT_ctl\n" );
#endif
    
    ( void ) ctx;
    ( void ) code;
    ( void ) option;
    return ( PAPI_OK );
}


//int NWUNIT_ntv_code_to_bits ( unsigned int EventCode, hwd_register_t * bits );


/*
 *
 */
int
NWUNIT_update_control_state( hwd_control_state_t * ptr,
                           NativeInfo_t * native, int count,
                           hwd_context_t * ctx )
{
#ifdef DEBUG_BGQ
    printf( "NWUNIT_update_control_state: count = %d\n", count );
#endif
    ( void ) ctx;
    int retval, index, i;
    NWUNIT_control_state_t * this_state = ( NWUNIT_control_state_t * ) ptr;
    
    // Delete and re-create BGPM eventset
    _common_deleteRecreate( &this_state->EventGroup );
        
    // 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("NWUNIT_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 );
        CHECK_BGPM_ERROR( retval, "Bgpm_AddEvent" );
    }
    
    return ( PAPI_OK );
}


/*
 * This function has to set the bits needed to count different domains
 * In particular: PAPI_DOM_USER, PAPI_DOM_KERNEL PAPI_DOM_OTHER
 * By default return PAPI_EINVAL if none of those are specified
 * and PAPI_OK with success
 * PAPI_DOM_USER is only user context is counted
 * PAPI_DOM_KERNEL is only the Kernel/OS context is counted
 * PAPI_DOM_OTHER  is Exception/transient mode (like user TLB misses)
 * PAPI_DOM_ALL   is all of the domains
 */
int
NWUNIT_set_domain( hwd_control_state_t * cntrl, int domain )
{
#ifdef DEBUG_BGQ
    printf( "NWUNIT_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 );
}


/*
 *
 */
int
NWUNIT_reset( hwd_context_t * ctx, hwd_control_state_t * ptr )
{
#ifdef DEBUG_BGQ
    printf( "NWUNIT_reset\n" );
#endif
    ( void ) ctx;
    int retval;
    NWUNIT_control_state_t * this_state = ( NWUNIT_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->AttachedEventGroup );
    CHECK_BGPM_ERROR( retval, "Bgpm_Stop" );
    
    retval = Bgpm_ResetStart( this_state->AttachedEventGroup );
    CHECK_BGPM_ERROR( retval, "Bgpm_ResetStart" );
    
    return ( PAPI_OK );
}


/*
 * PAPI Cleanup Eventset
 *
 * Destroy and re-create the BGPM / NWunit EventSet
 */
int
NWUNIT_cleanup_eventset( hwd_control_state_t * ctrl )
{
#ifdef DEBUG_BGQ
    printf( "NWUNIT_cleanup_eventset\n" );
#endif
    
    NWUNIT_control_state_t * this_state = ( NWUNIT_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
    _common_deleteRecreate( &this_state->EventGroup ); // HJ try to use delete() only
    
    return ( PAPI_OK );
}


/*
 * Native Event functions
 */
int
NWUNIT_ntv_enum_events( unsigned int *EventCode, int modifier )
{
    //printf( "NWUNIT_ntv_enum_events\n" );

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

        return ( PAPI_OK );
        break;

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

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

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


/*
 *
 */
int
NWUNIT_ntv_name_to_code( char *name, unsigned int *event_code )
{
#ifdef DEBUG_BGQ
    printf( "NWUNIT_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 > NWUNIT_MAX_COUNTERS ) // not a NWUnit event
        return PAPI_ENOEVNT;
    else
        *event_code = ( ret - OFFSET ) ;
    
    return PAPI_OK;
}


/*
 *
 */
int
NWUNIT_ntv_code_to_name( unsigned int EventCode, char *name, int len )
{
#ifdef DEBUG_BGQ
    //printf( "NWUNIT_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 );
}


/*
 *
 */
int
NWUNIT_ntv_code_to_descr( unsigned int EventCode, char *name, int len )
{
#ifdef DEBUG_BGQ
    //printf( "NWUNIT_ntv_code_to_descr\n" );
#endif
    int retval, index;
    
    index = ( EventCode ) + OFFSET;
    
    retval = Bgpm_GetLongDesc( index, name, &len );
    CHECK_BGPM_ERROR( retval, "Bgpm_GetLongDesc" );                      
    
    return ( PAPI_OK );
}


/*
 *
 */
int
NWUNIT_ntv_code_to_bits( unsigned int EventCode, hwd_register_t * bits )
{
#ifdef DEBUG_BGQ
    //printf( "NWUNIT_ntv_code_to_bits\n" );
#endif

    return ( PAPI_OK );
}


/*
 *
 */
papi_vector_t _NWunit_vector = {
    .cmp_info = {
                 /* default component information (unspecified values are initialized to 0) */
                 .name = "bgpm/NWUnit",
                 .short_name = "NWUnit",
                 .description = "Blue Gene/Q NWUnit component",
                 .num_cntrs = NWUNIT_MAX_COUNTERS,
                 .num_mpx_cntrs = NWUNIT_MAX_COUNTERS,
                 .default_domain = PAPI_DOM_USER,
                 .available_domains = PAPI_DOM_USER | PAPI_DOM_KERNEL,
                 .default_granularity = PAPI_GRN_THR,
                 .available_granularities = PAPI_GRN_THR,
        
                 .hardware_intr_sig = PAPI_INT_SIGNAL,
                 .hardware_intr = 1,
        
                 .kernel_multiplex = 0,

                 /* component specific cmp_info initializations */
                 .fast_real_timer = 0,
                 .fast_virtual_timer = 0,
                 .attach = 0,
                 .attach_must_ptrace = 0,
                 
                 }
    ,

    /* sizes of framework-opaque component-private structures */
    .size = {
             .context = sizeof ( NWUNIT_context_t ),
             .control_state = sizeof ( NWUNIT_control_state_t ),
             .reg_value = sizeof ( NWUNIT_register_t ),
             .reg_alloc = sizeof ( NWUNIT_reg_alloc_t ),
             }
    ,
    /* function pointers in this component */
    .init_thread = NWUNIT_init_thread,
    .init_component = NWUNIT_init_component,
    .init_control_state = NWUNIT_init_control_state,
    .start = NWUNIT_start,
    .stop = NWUNIT_stop,
    .read = NWUNIT_read,
    .shutdown_thread = NWUNIT_shutdown_thread,
    .cleanup_eventset = NWUNIT_cleanup_eventset,
    .ctl = NWUNIT_ctl,

    .update_control_state = NWUNIT_update_control_state,
    .set_domain = NWUNIT_set_domain,
    .reset = NWUNIT_reset,

    .ntv_name_to_code = NWUNIT_ntv_name_to_code,
    .ntv_enum_events = NWUNIT_ntv_enum_events,
    .ntv_code_to_name = NWUNIT_ntv_code_to_name,
    .ntv_code_to_descr = NWUNIT_ntv_code_to_descr,
    .ntv_code_to_bits = NWUNIT_ntv_code_to_bits
};