ebbc37584f
return the same value if there is no registered paffinity module. This commit was SVN r13509.
59 строки
1.3 KiB
C
59 строки
1.3 KiB
C
/*
|
|
* Copyright (c) 2007 The University of Tennessee and The University
|
|
* of Tennessee Research Foundation. All rights
|
|
* reserved.
|
|
* Copyright (c) 2007 Cisco Systems, Inc. All rights reserved.
|
|
* $COPYRIGHT$
|
|
*
|
|
* Additional copyrights may follow
|
|
*
|
|
* $HEADER$
|
|
*/
|
|
|
|
#include "opal_config.h"
|
|
|
|
#include <unistd.h>
|
|
|
|
#include "opal/constants.h"
|
|
#include "opal/util/num_procs.h"
|
|
#if defined(HAVE_SYS_SYSCTL_H)
|
|
#include <sys/sysctl.h>
|
|
#endif
|
|
|
|
|
|
/*
|
|
* Simple wrapper to get the number of processors on the local host
|
|
*/
|
|
int opal_get_num_processors(int *num_procs)
|
|
{
|
|
#ifdef __WINDOWS__
|
|
SYSTEM_INFO sys_info;
|
|
|
|
GetSystemInfo( &sys_info );
|
|
*num_procs = sys_info.dwNumberOfProcessors;
|
|
|
|
return OPAL_SUCCESS;
|
|
#else
|
|
/* POSIX environments */
|
|
|
|
#if defined(__APPLE__)
|
|
/* OSX has a special function for this */
|
|
size_t size = sizeof(*num_procs) ;
|
|
|
|
if (0 == sysctlbyname( "hw.ncpu", num_procs, &size, NULL, 0)) {
|
|
return OPAL_SUCCESS;
|
|
}
|
|
#elif OPAL_HAVE__SC_NPROCESSORS_ONLN
|
|
/* Other POSIX'es can use sysconf() */
|
|
int count = sysconf(_SC_NPROCESSORS_ONLN);
|
|
if (-1 != count) {
|
|
*num_procs = count;
|
|
return OPAL_SUCCESS;
|
|
}
|
|
#endif
|
|
/* Default case if we don't know how to get the processor number or if
|
|
something fails. */
|
|
return OPAL_ERR_NOT_FOUND;
|
|
#endif
|
|
}
|