diff options
Diffstat (limited to 'src/common/cpuinfo/CpuInfo.cpp')
| -rw-r--r-- | src/common/cpuinfo/CpuInfo.cpp | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/src/common/cpuinfo/CpuInfo.cpp b/src/common/cpuinfo/CpuInfo.cpp index 93f51e599a..d46d8d7773 100644 --- a/src/common/cpuinfo/CpuInfo.cpp +++ b/src/common/cpuinfo/CpuInfo.cpp @@ -29,6 +29,7 @@ #include "support/StringSupport.h" #include "support/ToolchainSupport.h" +#include <map> #include <sstream> #if !defined(BARE_METAL) @@ -269,6 +270,46 @@ int get_max_cpus() } return max_cpus; } +#if defined(__ANDROID__) +std::vector<uint32_t> get_cpu_capacities() +{ + std::vector<uint32_t> cpu_capacities; + for (int i = 0; i < get_max_cpus(); ++i) + { + std::stringstream str; + str << "/sys/devices/system/cpu/cpu" << i << "/cpu_capacity"; + std::ifstream file(str.str(), std::ios::in); + if (file.is_open()) + { + std::string line; + if (bool(getline(file, line))) + { + cpu_capacities.emplace_back(support::cpp11::stoul(line)); + } + } + } + + return cpu_capacities; +} + +uint32_t not_little_num_cpus_internal() +{ + std::vector<uint32_t> cpus_all = get_cpu_capacities(); + std::vector<uint32_t> cpus_not_little; + + std::vector<uint32_t>::iterator result = std::max_element(cpus_all.begin(), cpus_all.end()); + uint32_t max_capacity = *result; + uint32_t threshold = max_capacity / 2; + for (unsigned int i = 0; i < cpus_all.size(); i++) + { + if (!(cpus_all[i] < threshold)) + { + cpus_not_little.emplace_back(cpus_all[i]); + } + } + return cpus_not_little.size(); +} +#endif /* defined(__ANDROID__) */ #elif defined(__aarch64__) && \ defined(__APPLE__) /* !defined(BARE_METAL) && !defined(__APPLE__) && (defined(__arm__) || defined(__aarch64__)) */ /** Query features through sysctlbyname @@ -363,6 +404,8 @@ CpuInfo CpuInfo::build() isainfo.neon = get_hw_capability("hw.optional.neon"); isainfo.fp16 = get_hw_capability("hw.optional.neon_fp16"); isainfo.dot = get_hw_capability("hw.optional.arm.FEAT_DotProd"); + isainfo.bf16 = get_hw_capability("hw.optional.arm.FEAT_BF16"); + isainfo.i8mm = get_hw_capability("hw.optional.arm.FEAT_I8MM"); CpuInfo info(isainfo, cpus_model); return info; #elif defined(__aarch64__) && defined(_WIN64) /* #elif defined(__aarch64__) && defined(__APPLE__) */ @@ -400,6 +443,15 @@ uint32_t CpuInfo::num_cpus() const return _cpus.size(); } +uint32_t CpuInfo::not_little_num_cpus() const +{ +#if defined(__ANDROID__) + return not_little_num_cpus_internal(); +#else /* defined(__ANDROID__) */ + return num_cpus(); +#endif /* defined(__ANDROID__) */ +} + uint32_t num_threads_hint() { unsigned int num_threads_hint = 1; |