papi_libpfm4_events.c

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/*
* File:    papi_libpfm4_events.c
* Author:  Vince Weaver vincent.weaver @ maine.edu
*          based heavily on existing papi_libpfm3_events.c
*/

#include <string.h>

#include "papi.h"
#include "papi_internal.h"
#include "papi_vector.h"

#include "papi_libpfm4_events.h"

#include "perfmon/pfmlib.h"
#include "perfmon/pfmlib_perf_event.h"

/**********************************************************/
/* Local scope globals                                    */
/**********************************************************/

static int libpfm4_users=0;

/***********************************************************/
/* Exported functions                                      */
/***********************************************************/

int
_papi_libpfm4_error( int pfm_error ) {

  switch ( pfm_error ) {
  case PFM_SUCCESS:      return PAPI_OK;       /* success */
  case PFM_ERR_NOTSUPP:  return PAPI_ENOSUPP;  /* function not supported */
  case PFM_ERR_INVAL:    return PAPI_EINVAL;   /* invalid parameters */
  case PFM_ERR_NOINIT:   return PAPI_ENOINIT;  /* library not initialized */
  case PFM_ERR_NOTFOUND: return PAPI_ENOEVNT;  /* event not found */
  case PFM_ERR_FEATCOMB: return PAPI_ECOMBO;   /* invalid combination of features */
  case PFM_ERR_UMASK:    return PAPI_EATTR;    /* invalid or missing unit mask */
  case PFM_ERR_NOMEM:    return PAPI_ENOMEM;   /* out of memory */
  case PFM_ERR_ATTR:     return PAPI_EATTR;    /* invalid event attribute */
  case PFM_ERR_ATTR_VAL: return PAPI_EATTR;    /* invalid event attribute value */
  case PFM_ERR_ATTR_SET: return PAPI_EATTR;    /* attribute value already set */
  case PFM_ERR_TOOMANY:  return PAPI_ECOUNT;   /* too many parameters */
  case PFM_ERR_TOOSMALL: return PAPI_ECOUNT;   /* parameter is too small */
  default:
    PAPIWARN("Unknown libpfm error code %d, returning PAPI_EINVAL",pfm_error);
    return PAPI_EINVAL;
  }
}

int
_papi_libpfm4_shutdown(papi_vector_t *my_vector) {

    /* clean out and free the native events structure */
    _papi_hwi_lock( NAMELIB_LOCK );

    libpfm4_users--;

    /* Only free if we're the last user */

    if (!libpfm4_users) {
        pfm_terminate();
    }

    _papi_hwi_unlock( NAMELIB_LOCK );

    strcpy(my_vector->cmp_info.support_version,"");

    return PAPI_OK;
}

int
_papi_libpfm4_init(papi_vector_t *my_vector) {

    int version;
    pfm_err_t retval = PFM_SUCCESS;

    _papi_hwi_lock( NAMELIB_LOCK );

    if (!libpfm4_users) {
        retval = pfm_initialize();
        if ( retval == PFM_SUCCESS ) {
            libpfm4_users++;
        }
        else {
            strncpy(my_vector->cmp_info.disabled_reason,
                pfm_strerror(retval),PAPI_MAX_STR_LEN);
            _papi_hwi_unlock( NAMELIB_LOCK );
            return PAPI_ESBSTR;
        }
    }
    else {
        libpfm4_users++;
    }

    _papi_hwi_unlock( NAMELIB_LOCK );

    /* get the libpfm4 version */

    version=pfm_get_version( );
    if (version >= 0) {

        /* Complain if the compiled-against version */
        /* doesn't match current version            */

        if ( PFM_MAJ_VERSION( version ) !=
            PFM_MAJ_VERSION( LIBPFM_VERSION ) ) {

            PAPIWARN( "Version mismatch of libpfm: "
                "compiled %#x vs. installed %#x\n",
                PFM_MAJ_VERSION( LIBPFM_VERSION ),
                PFM_MAJ_VERSION( version ) );

        }

        /* Set the version */
        sprintf( my_vector->cmp_info.support_version, "%d.%d",
            PFM_MAJ_VERSION( version ),
            PFM_MIN_VERSION( version ) );

    } else {
        PAPIWARN( "pfm_get_version(): %s", pfm_strerror( retval ) );
    }

    return PAPI_OK;
}