use hw.physicalcpu to get a more accurate CPU count on OS X (hw.ncpu includes hyperthreading cpus)

2013-05-08 10:47:23 -04:00
parent b08c71af02
commit eb5096bfc7
1 changed files with 1 additions and 1 deletions
--- a/libs/pbd/cpus.cc
+++ b/libs/pbd/cpus.cc
@@ -40,7 +40,7 @@ hardware_concurrency()
 #elif defined(__APPLE__) || defined(__FreeBSD__)
        int count;
        size_t size=sizeof(count);
-        return sysctlbyname("hw.ncpu",&count,&size,NULL,0)?0:count;
+        return sysctlbyname("hw.physicalcpu",&count,&size,NULL,0)?0:count;
 #elif defined(HAVE_UNISTD) && defined(_SC_NPROCESSORS_ONLN)
        int const count=sysconf(_SC_NPROCESSORS_ONLN);
        return (count>0)?count:0;