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re PR other/58996 (build failure in libcilkrts)

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Fix for PR other/58996.
+2014-01-20  Balaji V. Iyer  <balaji.v.iyer@intel.com>
+
+       PR other/58996
+       * configure.ac: Added a check for pthread affinity support.
+       * runtime/os-unix.c: Likewise.
+       * configure: Regenerate.
+

From-SVN: r206846
This commit is contained in:
Balaji V. Iyer 2014-01-20 17:49:22 +00:00 committed by Balaji V. Iyer
parent eee0e4879f
commit ef132d593e
4 changed files with 64 additions and 0 deletions
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7
libcilkrts/ChangeLog
View File

@ -1,3 +1,10 @@
2014-01-20 Balaji V. Iyer <balaji.v.iyer@intel.com>
PR other/58996
* configure.ac: Added a check for pthread affinity support.
* runtime/os-unix.c: Likewise.
* configure: Regenerate.
2014-01-09 Balaji V. Iyer <balaji.v.iyer@intel.com>
bootstrap/59094

32
libcilkrts/configure vendored
View File

@ -14420,6 +14420,38 @@ ac_compiler_gnu=$ac_cv_c_compiler_gnu
# Check for pthread_{,attr_}[sg]etaffinity_np.
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
#define _GNU_SOURCE
#include <pthread.h>
int
main ()
{
cpu_set_t cpuset;
pthread_attr_t attr;
pthread_getaffinity_np (pthread_self (), sizeof (cpu_set_t), &cpuset);
if (CPU_ISSET (0, &cpuset))
CPU_SET (1, &cpuset);
else
CPU_ZERO (&cpuset);
pthread_setaffinity_np (pthread_self (), sizeof (cpu_set_t), &cpuset);
pthread_attr_init (&attr);
pthread_attr_getaffinity_np (&attr, sizeof (cpu_set_t), &cpuset);
pthread_attr_setaffinity_np (&attr, sizeof (cpu_set_t), &cpuset);
;
return 0;
}
_ACEOF
if ac_fn_c_try_link "$LINENO"; then :
$as_echo "#define HAVE_PTHREAD_AFFINITY_NP 1" >>confdefs.h
fi
rm -f core conftest.err conftest.$ac_objext \
conftest$ac_exeext conftest.$ac_ext
# Must be last
cat >confcache <<\_ACEOF
# This file is a shell script that caches the results of configure

20
libcilkrts/configure.ac
View File

@ -164,5 +164,25 @@ AC_SUBST(toolexeclibdir)
AC_SUBST(lt_cv_dlopen_libs)
# Check for pthread_{,attr_}[sg]etaffinity_np.
AC_LINK_IFELSE(
[AC_LANG_PROGRAM(
[#define _GNU_SOURCE
#include <pthread.h>],
[cpu_set_t cpuset;
pthread_attr_t attr;
pthread_getaffinity_np (pthread_self (), sizeof (cpu_set_t), &cpuset);
if (CPU_ISSET (0, &cpuset))
CPU_SET (1, &cpuset);
else
CPU_ZERO (&cpuset);
pthread_setaffinity_np (pthread_self (), sizeof (cpu_set_t), &cpuset);
pthread_attr_init (&attr);
pthread_attr_getaffinity_np (&attr, sizeof (cpu_set_t), &cpuset);
pthread_attr_setaffinity_np (&attr, sizeof (cpu_set_t), &cpuset);])],
AC_DEFINE(HAVE_PTHREAD_AFFINITY_NP, 1,
[ Define if pthread_{,attr_}{g,s}etaffinity_np is supported.]))
# Must be last
AC_OUTPUT

5
libcilkrts/runtime/os-unix.c
View File

@ -311,6 +311,10 @@ static pid_t linux_gettid(void)
*/
static int linux_get_affinity_count (int tid)
{
#if !defined HAVE_PTHREAD_AFFINITY_NP
return 0;
#else
cpu_set_t process_mask;
// Extract the thread affinity mask
@ -337,6 +341,7 @@ static int linux_get_affinity_count (int tid)
}
return available_procs;
#endif
}
#endif