|
#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> |
|
|
|
#include <TargetConditionals.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; |
|
#if !TARGET_OS_IPHONE |
|
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; |
|
} |
|
#endif |
|
|
|
cpuinfo_log_debug("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 |
|
}; |
|
|
|
#if !TARGET_OS_IPHONE |
|
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]; |
|
} |
|
} |
|
} |
|
#endif |
|
return topology; |
|
} |
|
|