@@ -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
@@ -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
@@ -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
Hello Everyone, The attached patch will fix the issue pointed out in PR 58996. The main issue was that the runtime was not checking for the availability of pthread affinity before calling its functions. This patch should fix that. Here is the ChangeLog entry: 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. Thanks, Balaji V. Iyer.