COMMON_SYSDEP int __cilkrts_hardware_cpu_count(void)
{
#if defined ANDROID
return sysconf (_SC_NPROCESSORS_ONLN);
#elif defined __MIC__
/// HACK: Usually, the 3rd and 4th hyperthreads are not beneficial
/// on KNC. Also, ignore the last core.
int P = sysconf (_SC_NPROCESSORS_ONLN);
return P/2 - 2;
#elif defined __linux__
int affinity_count = linux_get_affinity_count(linux_gettid());
return (0 != affinity_count) ? affinity_count : sysconf (_SC_NPROCESSORS_ONLN);
#elif defined __APPLE__
int count = 0;
int cmd[2] = { CTL_HW, HW_NCPU };
size_t len = sizeof count;
int status = sysctl(cmd, 2, &count, &len, 0, 0);
assert(status >= 0);
assert((unsigned)count == count);
return count;
#elif defined __FreeBSD__ || defined __CYGWIN__
int ncores = sysconf(_SC_NPROCESSORS_ONLN);
return ncores;
// Just get the number of processors
// return sysconf(_SC_NPROCESSORS_ONLN);
#elif defined __VXWORKS__
return __builtin_popcount( vxCpuEnabledGet() );
#else
#error "Unknown architecture"
#endif
}
long
ACE_OS::num_processors_online (void)
{
ACE_OS_TRACE ("ACE_OS::num_processors_online");
#if defined (ACE_HAS_PHARLAP)
return 1;
#elif defined (ACE_WIN32)
SYSTEM_INFO sys_info;
::GetSystemInfo (&sys_info);
long active_processors = 0;
DWORD_PTR mask = sys_info.dwActiveProcessorMask;
while (mask != 0)
{
if (mask & 1)
++active_processors;
mask >>= 1;
}
return active_processors;
#elif defined (ACE_HAS_VXCPULIB)
long num_cpu = 0;
cpuset_t cpuset;
CPUSET_ZERO (cpuset);
cpuset = vxCpuEnabledGet();
unsigned int const maxcpu = vxCpuConfiguredGet();
for (unsigned int i =0; i < maxcpu; i++)
{
if (CPUSET_ISSET (cpuset, i))
{
++num_cpu;
}
}
return num_cpu;
#elif defined (_SC_NPROCESSORS_ONLN)
return ::sysconf (_SC_NPROCESSORS_ONLN);
#elif defined (ACE_HAS_SYSCTL)
int num_processors;
int mib[2] = { CTL_HW, HW_NCPU };
size_t len = sizeof (num_processors);
if (::sysctl (mib, 2, &num_processors, &len, 0, 0) != -1)
return num_processors;
else
return -1;
#elif defined (__hpux)
struct pst_dynamic psd;
if (::pstat_getdynamic (&psd, sizeof (psd), (size_t) 1, 0) != -1)
return psd.psd_proc_cnt;
else
return -1;
#else
ACE_NOTSUP_RETURN (-1);
#endif
}