Hardware Locality (hwloc)
1.4.1
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00001 /* 00002 * Copyright © 2009 CNRS 00003 * Copyright © 2009-2010 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 00017 #ifndef HWLOC_GLIBC_SCHED_H 00018 #define HWLOC_GLIBC_SCHED_H 00019 00020 #include <hwloc.h> 00021 #include <hwloc/helper.h> 00022 #include <assert.h> 00023 00024 #if !defined _GNU_SOURCE || !defined _SCHED_H || (!defined CPU_SETSIZE && !defined sched_priority) 00025 #error Please make sure to include sched.h before including glibc-sched.h, and define _GNU_SOURCE before any inclusion of sched.h 00026 #endif 00027 00028 00029 #ifdef __cplusplus 00030 extern "C" { 00031 #endif 00032 00033 00034 #ifdef HWLOC_HAVE_CPU_SET 00035 00036 00049 static inline int 00050 hwloc_cpuset_to_glibc_sched_affinity(hwloc_topology_t topology , hwloc_const_cpuset_t hwlocset, 00051 cpu_set_t *schedset, size_t schedsetsize) 00052 { 00053 #ifdef CPU_ZERO_S 00054 unsigned cpu; 00055 CPU_ZERO_S(schedsetsize, schedset); 00056 hwloc_bitmap_foreach_begin(cpu, hwlocset) 00057 CPU_SET_S(cpu, schedsetsize, schedset); 00058 hwloc_bitmap_foreach_end(); 00059 #else /* !CPU_ZERO_S */ 00060 unsigned cpu; 00061 CPU_ZERO(schedset); 00062 assert(schedsetsize == sizeof(cpu_set_t)); 00063 hwloc_bitmap_foreach_begin(cpu, hwlocset) 00064 CPU_SET(cpu, schedset); 00065 hwloc_bitmap_foreach_end(); 00066 #endif /* !CPU_ZERO_S */ 00067 return 0; 00068 } 00069 00077 static inline int 00078 hwloc_cpuset_from_glibc_sched_affinity(hwloc_topology_t topology , hwloc_cpuset_t hwlocset, 00079 const cpu_set_t *schedset, size_t schedsetsize) 00080 { 00081 int cpu; 00082 #ifdef CPU_ZERO_S 00083 int count; 00084 #endif 00085 hwloc_bitmap_zero(hwlocset); 00086 #ifdef CPU_ZERO_S 00087 count = CPU_COUNT_S(schedsetsize, schedset); 00088 cpu = 0; 00089 while (count) { 00090 if (CPU_ISSET_S(cpu, schedsetsize, schedset)) { 00091 hwloc_bitmap_set(hwlocset, cpu); 00092 count--; 00093 } 00094 cpu++; 00095 } 00096 #else /* !CPU_ZERO_S */ 00097 /* sched.h does not support dynamic cpu_set_t (introduced in glibc 2.7), 00098 * assume we have a very old interface without CPU_COUNT (added in 2.6) 00099 */ 00100 assert(schedsetsize == sizeof(cpu_set_t)); 00101 for(cpu=0; cpu<CPU_SETSIZE; cpu++) 00102 if (CPU_ISSET(cpu, schedset)) 00103 hwloc_bitmap_set(hwlocset, cpu); 00104 #endif /* !CPU_ZERO_S */ 00105 return 0; 00106 } 00107 00111 #endif /* CPU_SET */ 00112 00113 00114 #ifdef __cplusplus 00115 } /* extern "C" */ 00116 #endif 00117 00118 00119 #endif /* HWLOC_GLIBC_SCHED_H */