Not all systems support using sysconf to detect the number of available CPU cores. Older BSD and BSD-derived systems only provide the information via the sysctl function. If HAVE_BSD_SYSCTL is defined attempt to retrieve the number of available CPU cores using the sysctl function. If HAVE_BSD_SYSCTL is not defined or the sysctl function fails, we still attempt to get the information via sysconf. Signed-off-by: Kyle J. McKay <mackyle@xxxxxxxxx> --- thread-utils.c | 18 +++++++++++++++++- 1 file changed, 17 insertions(+), 1 deletion(-) diff --git a/thread-utils.c b/thread-utils.c index 97396a75..a2135e07 100644 --- a/thread-utils.c +++ b/thread-utils.c @@ -35,7 +35,23 @@ int online_cpus(void) if (!pstat_getdynamic(&psd, sizeof(psd), (size_t)1, 0)) return (int)psd.psd_proc_cnt; -#endif +#elif defined(HAVE_BSD_SYSCTL) && defined(HW_NCPU) + int mib[2]; + size_t len; + int cpucount; + + mib[0] = CTL_HW; +# ifdef HW_AVAILCPU + mib[1] = HW_AVAILCPU; + len = sizeof(cpucount); + if (!sysctl(mib, 2, &cpucount, &len, NULL, 0)) + return cpucount; +# endif /* HW_AVAILCPU */ + mib[1] = HW_NCPU; + len = sizeof(cpucount); + if (!sysctl(mib, 2, &cpucount, &len, NULL, 0)) + return cpucount; +#endif /* defined(HAVE_BSD_SYSCTL) && defined(HW_NCPU) */ #ifdef _SC_NPROCESSORS_ONLN if ((ncpus = (long)sysconf(_SC_NPROCESSORS_ONLN)) > 0) --- -- To unsubscribe from this list: send the line "unsubscribe git" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html