| #include <string.h> |
| #include <alloca.h> |
| #include <errno.h> |
| |
| #include <sys/types.h> |
| #include <sys/sysctl.h> |
| |
| #include <cpuinfo/log.h> |
| #include <mach/api.h> |
| |
| |
| struct cpuinfo_mach_topology cpuinfo_mach_detect_topology(void) { |
| int cores = 1; |
| size_t sizeof_cores = sizeof(cores); |
| if (sysctlbyname("hw.physicalcpu_max", &cores, &sizeof_cores, NULL, 0) != 0) { |
| cpuinfo_log_error("sysctlbyname(\"hw.physicalcpu_max\") failed: %s", strerror(errno)); |
| } else if (cores <= 0) { |
| cpuinfo_log_error("sysctlbyname(\"hw.physicalcpu_max\") returned invalid value %d", cores); |
| cores = 1; |
| } |
| |
| int threads = 1; |
| size_t sizeof_threads = sizeof(threads); |
| if (sysctlbyname("hw.logicalcpu_max", &threads, &sizeof_threads, NULL, 0) != 0) { |
| cpuinfo_log_error("sysctlbyname(\"hw.logicalcpu_max\") failed: %s", strerror(errno)); |
| } else if (threads <= 0) { |
| cpuinfo_log_error("sysctlbyname(\"hw.logicalcpu_max\") returned invalid value %d", threads); |
| threads = cores; |
| } |
| |
| int packages = 1; |
| size_t sizeof_packages = sizeof(packages); |
| if (sysctlbyname("hw.packages", &packages, &sizeof_packages, NULL, 0) != 0) { |
| cpuinfo_log_error("sysctlbyname(\"hw.packages\") failed: %s", strerror(errno)); |
| } else if (packages <= 0) { |
| cpuinfo_log_error("sysctlbyname(\"hw.packages\") returned invalid value %d", packages); |
| packages = 1; |
| } |
| |
| cpuinfo_log_info("mach topology: packages = %d, cores = %d, threads = %d", packages, (int) cores, (int) threads); |
| struct cpuinfo_mach_topology topology = { |
| .packages = (uint32_t) packages, |
| .cores = (uint32_t) cores, |
| .threads = (uint32_t) threads |
| }; |
| |
| size_t cacheconfig_size = 0; |
| if (sysctlbyname("hw.cacheconfig", NULL, &cacheconfig_size, NULL, 0) != 0) { |
| cpuinfo_log_error("sysctlbyname(\"hw.cacheconfig\") failed: %s", strerror(errno)); |
| } else { |
| uint64_t* cacheconfig = alloca(cacheconfig_size); |
| if (sysctlbyname("hw.cacheconfig", cacheconfig, &cacheconfig_size, NULL, 0) != 0) { |
| cpuinfo_log_error("sysctlbyname(\"hw.cacheconfig\") failed: %s", strerror(errno)); |
| } else { |
| size_t cache_configs = cacheconfig_size / sizeof(uint64_t); |
| cpuinfo_log_debug("mach hw.cacheconfig count: %zu", cache_configs); |
| if (cache_configs > CPUINFO_MACH_MAX_CACHE_LEVELS) { |
| cache_configs = CPUINFO_MACH_MAX_CACHE_LEVELS; |
| } |
| for (size_t i = 0; i < cache_configs; i++) { |
| cpuinfo_log_debug("mach hw.cacheconfig[%zu]: %"PRIu64, i, cacheconfig[i]); |
| topology.threads_per_cache[i] = cacheconfig[i]; |
| } |
| } |
| } |
| return topology; |
| } |