Hardware Locality (hwloc) 1.4.2

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glibc-sched.h

    00001 /*
    00002  * Copyright © 2009 CNRS
    00003  * Copyright © 2009-2012 inria.  All rights reserved.
    00004  * Copyright © 2009-2011 Université Bordeaux 1
    00005  * Copyright © 2011 Cisco Systems, Inc.  All rights reserved.
    00006  * See COPYING in top-level directory.
    00007  */
    00008
    00019 #ifndef HWLOC_GLIBC_SCHED_H
    00020 #define HWLOC_GLIBC_SCHED_H
    00021
    00022 #include <hwloc.h>
    00023 #include <hwloc/helper.h>
    00024 #include <assert.h>
    00025
    00026 #if !defined _GNU_SOURCE || !defined _SCHED_H || (!defined CPU_SETSIZE && !defined sched_priority)
    00027 #error Please make sure to include sched.h before including glibc-sched.h, and define _GNU_SOURCE before any inclusion of sched.h
    00028 #endif
    00029
    00030
    00031 #ifdef __cplusplus
    00032 extern "C" {
    00033 #endif
    00034
    00035
    00036 #ifdef HWLOC_HAVE_CPU_SET
    00037
    00038
    00051 static inline int
    00052 hwloc_cpuset_to_glibc_sched_affinity(hwloc_topology_t topology , hwloc_const_cpuset_t hwlocset,
    00053                                     cpu_set_t *schedset, size_t schedsetsize)
    00054 {
    00055 #ifdef CPU_ZERO_S
    00056   unsigned cpu;
    00057   CPU_ZERO_S(schedsetsize, schedset);
    00058   hwloc_bitmap_foreach_begin(cpu, hwlocset)
    00059     CPU_SET_S(cpu, schedsetsize, schedset);
    00060   hwloc_bitmap_foreach_end();
    00061 #else /* !CPU_ZERO_S */
    00062   unsigned cpu;
    00063   CPU_ZERO(schedset);
    00064   assert(schedsetsize == sizeof(cpu_set_t));
    00065   hwloc_bitmap_foreach_begin(cpu, hwlocset)
    00066     CPU_SET(cpu, schedset);
    00067   hwloc_bitmap_foreach_end();
    00068 #endif /* !CPU_ZERO_S */
    00069   return 0;
    00070 }
    00071
    00079 static inline int
    00080 hwloc_cpuset_from_glibc_sched_affinity(hwloc_topology_t topology , hwloc_cpuset_t hwlocset,
    00081                                        const cpu_set_t *schedset, size_t schedsetsize)
    00082 {
    00083   int cpu;
    00084 #ifdef CPU_ZERO_S
    00085   int count;
    00086 #endif
    00087   hwloc_bitmap_zero(hwlocset);
    00088 #ifdef CPU_ZERO_S
    00089   count = CPU_COUNT_S(schedsetsize, schedset);
    00090   cpu = 0;
    00091   while (count) {
    00092     if (CPU_ISSET_S(cpu, schedsetsize, schedset)) {
    00093       hwloc_bitmap_set(hwlocset, cpu);
    00094       count--;
    00095     }
    00096     cpu++;
    00097   }
    00098 #else /* !CPU_ZERO_S */
    00099   /* sched.h does not support dynamic cpu_set_t (introduced in glibc 2.7),
    00100    * assume we have a very old interface without CPU_COUNT (added in 2.6)
    00101    */
    00102   assert(schedsetsize == sizeof(cpu_set_t));
    00103   for(cpu=0; cpu<CPU_SETSIZE; cpu++)
    00104     if (CPU_ISSET(cpu, schedset))
    00105       hwloc_bitmap_set(hwlocset, cpu);
    00106 #endif /* !CPU_ZERO_S */
    00107   return 0;
    00108 }
    00109
    00113 #endif /* CPU_SET */
    00114
    00115
    00116 #ifdef __cplusplus
    00117 } /* extern "C" */
    00118 #endif
    00119
    00120
    00121 #endif /* HWLOC_GLIBC_SCHED_H */