commit | 101874091278c7ceb1916f525e5ed90fcbe40dd2 | [log] [tgz] |
---|---|---|
author | Everton Constantino <everton.constantino@linaro.org> | Sat Mar 16 21:45:01 2024 -0300 |
committer | Copybara-Service <copybara-worker@google.com> | Sat Mar 16 17:51:08 2024 -0700 |
tree | 88d14cc5f0560f096af9b08a3e51bf3df0cb389a | |
parent | 96775f8ac60f47fc8c09485a98ae24299b928515 [diff] |
Include support for Windows on Arm on BUILD.bazel along with proper Volterra detection (#220) This MR includes support for building with Bazel on cpu `arm64_windows`, I also tried this on my Volterra Windows Dev Kit and noticed that the core string seems different from what the current source code defines. I don't know if this is because my hardware is a bit different or not. I ran the tests with the following results ``` [==========] Running 132 tests from 28 test suites. [----------] Global test environment set-up. [----------] 1 test from PROCESSORS_COUNT [ RUN ] PROCESSORS_COUNT.non_zero [ OK ] PROCESSORS_COUNT.non_zero (0 ms) [----------] 1 test from PROCESSORS_COUNT (0 ms total) [----------] 1 test from PROCESSORS [ RUN ] PROCESSORS.non_null [ OK ] PROCESSORS.non_null (0 ms) [----------] 1 test from PROCESSORS (0 ms total) [----------] 13 tests from PROCESSOR [ RUN ] PROCESSOR.non_null [ OK ] PROCESSOR.non_null (0 ms) [ RUN ] PROCESSOR.valid_smt_id [ OK ] PROCESSOR.valid_smt_id (0 ms) [ RUN ] PROCESSOR.valid_core [ OK ] PROCESSOR.valid_core (0 ms) [ RUN ] PROCESSOR.consistent_core [ OK ] PROCESSOR.consistent_core (0 ms) [ RUN ] PROCESSOR.valid_cluster [ OK ] PROCESSOR.valid_cluster (0 ms) [ RUN ] PROCESSOR.consistent_cluster [ OK ] PROCESSOR.consistent_cluster (0 ms) [ RUN ] PROCESSOR.valid_package [ OK ] PROCESSOR.valid_package (0 ms) [ RUN ] PROCESSOR.consistent_package [ OK ] PROCESSOR.consistent_package (0 ms) [ RUN ] PROCESSOR.consistent_l1i [ OK ] PROCESSOR.consistent_l1i (0 ms) [ RUN ] PROCESSOR.consistent_l1d [ OK ] PROCESSOR.consistent_l1d (0 ms) [ RUN ] PROCESSOR.consistent_l2 [ OK ] PROCESSOR.consistent_l2 (0 ms) [ RUN ] PROCESSOR.consistent_l3 [ OK ] PROCESSOR.consistent_l3 (0 ms) [ RUN ] PROCESSOR.consistent_l4 [ OK ] PROCESSOR.consistent_l4 (0 ms) [----------] 13 tests from PROCESSOR (7 ms total) [----------] 1 test from CORES_COUNT [ RUN ] CORES_COUNT.within_bounds [ OK ] CORES_COUNT.within_bounds (0 ms) [----------] 1 test from CORES_COUNT (0 ms total) [----------] 1 test from CORES [ RUN ] CORES.non_null [ OK ] CORES.non_null (0 ms) [----------] 1 test from CORES (0 ms total) [----------] 10 tests from CORE [ RUN ] CORE.non_null [ OK ] CORE.non_null (0 ms) [ RUN ] CORE.non_zero_processors [ OK ] CORE.non_zero_processors (0 ms) [ RUN ] CORE.consistent_processors [ OK ] CORE.consistent_processors (0 ms) [ RUN ] CORE.valid_core_id [ OK ] CORE.valid_core_id (0 ms) [ RUN ] CORE.valid_cluster [ OK ] CORE.valid_cluster (0 ms) [ RUN ] CORE.consistent_cluster [ OK ] CORE.consistent_cluster (0 ms) [ RUN ] CORE.valid_package [ OK ] CORE.valid_package (0 ms) [ RUN ] CORE.consistent_package [ OK ] CORE.consistent_package (0 ms) [ RUN ] CORE.known_vendor [ OK ] CORE.known_vendor (0 ms) [ RUN ] CORE.known_uarch [ OK ] CORE.known_uarch (0 ms) [----------] 10 tests from CORE (5 ms total) [----------] 1 test from CLUSTERS_COUNT [ RUN ] CLUSTERS_COUNT.within_bounds [ OK ] CLUSTERS_COUNT.within_bounds (0 ms) [----------] 1 test from CLUSTERS_COUNT (0 ms total) [----------] 1 test from CLUSTERS [ RUN ] CLUSTERS.non_null [ OK ] CLUSTERS.non_null (0 ms) [----------] 1 test from CLUSTERS (0 ms total) [----------] 14 tests from CLUSTER [ RUN ] CLUSTER.non_null [ OK ] CLUSTER.non_null (0 ms) [ RUN ] CLUSTER.non_zero_processors [ OK ] CLUSTER.non_zero_processors (0 ms) [ RUN ] CLUSTER.valid_processors [ OK ] CLUSTER.valid_processors (0 ms) [ RUN ] CLUSTER.consistent_processors [ OK ] CLUSTER.consistent_processors (0 ms) [ RUN ] CLUSTER.non_zero_cores [ OK ] CLUSTER.non_zero_cores (0 ms) [ RUN ] CLUSTER.valid_cores [ OK ] CLUSTER.valid_cores (0 ms) [ RUN ] CLUSTER.consistent_cores [ OK ] CLUSTER.consistent_cores (0 ms) [ RUN ] CLUSTER.valid_cluster_id [ OK ] CLUSTER.valid_cluster_id (0 ms) [ RUN ] CLUSTER.valid_package [ OK ] CLUSTER.valid_package (0 ms) [ RUN ] CLUSTER.consistent_package [ OK ] CLUSTER.consistent_package (0 ms) [ RUN ] CLUSTER.consistent_vendor [ OK ] CLUSTER.consistent_vendor (0 ms) [ RUN ] CLUSTER.consistent_uarch [ OK ] CLUSTER.consistent_uarch (0 ms) [ RUN ] CLUSTER.consistent_midr [ OK ] CLUSTER.consistent_midr (0 ms) [ RUN ] CLUSTER.consistent_frequency [ OK ] CLUSTER.consistent_frequency (0 ms) [----------] 14 tests from CLUSTER (7 ms total) [----------] 1 test from PACKAGES_COUNT [ RUN ] PACKAGES_COUNT.within_bounds [ OK ] PACKAGES_COUNT.within_bounds (0 ms) [----------] 1 test from PACKAGES_COUNT (0 ms total) [----------] 1 test from PACKAGES [ RUN ] PACKAGES.non_null [ OK ] PACKAGES.non_null (0 ms) [----------] 1 test from PACKAGES (0 ms total) [----------] 10 tests from PACKAGE [ RUN ] PACKAGE.non_null [ OK ] PACKAGE.non_null (0 ms) [ RUN ] PACKAGE.non_zero_processors [ OK ] PACKAGE.non_zero_processors (0 ms) [ RUN ] PACKAGE.valid_processors [ OK ] PACKAGE.valid_processors (0 ms) [ RUN ] PACKAGE.consistent_processors [ OK ] PACKAGE.consistent_processors (0 ms) [ RUN ] PACKAGE.non_zero_cores [ OK ] PACKAGE.non_zero_cores (0 ms) [ RUN ] PACKAGE.valid_cores [ OK ] PACKAGE.valid_cores (0 ms) [ RUN ] PACKAGE.consistent_cores [ OK ] PACKAGE.consistent_cores (0 ms) [ RUN ] PACKAGE.non_zero_clusters [ OK ] PACKAGE.non_zero_clusters (0 ms) [ RUN ] PACKAGE.valid_clusters [ OK ] PACKAGE.valid_clusters (0 ms) [ RUN ] PACKAGE.consistent_cluster [ OK ] PACKAGE.consistent_cluster (0 ms) [----------] 10 tests from PACKAGE (5 ms total) [----------] 1 test from UARCHS_COUNT [ RUN ] UARCHS_COUNT.within_bounds [ OK ] UARCHS_COUNT.within_bounds (0 ms) [----------] 1 test from UARCHS_COUNT (0 ms total) [----------] 1 test from UARCHS [ RUN ] UARCHS.non_null [ OK ] UARCHS.non_null (0 ms) [----------] 1 test from UARCHS (0 ms total) [----------] 5 tests from UARCH [ RUN ] UARCH.non_null [ OK ] UARCH.non_null (0 ms) [ RUN ] UARCH.non_zero_processors [ OK ] UARCH.non_zero_processors (0 ms) [ RUN ] UARCH.valid_processors [ OK ] UARCH.valid_processors (0 ms) [ RUN ] UARCH.non_zero_cores [ OK ] UARCH.non_zero_cores (0 ms) [ RUN ] UARCH.valid_cores [ OK ] UARCH.valid_cores (0 ms) [----------] 5 tests from UARCH (2 ms total) [----------] 1 test from L1I_CACHES_COUNT [ RUN ] L1I_CACHES_COUNT.within_bounds [ OK ] L1I_CACHES_COUNT.within_bounds (0 ms) [----------] 1 test from L1I_CACHES_COUNT (0 ms total) [----------] 1 test from L1I_CACHES [ RUN ] L1I_CACHES.non_null [ OK ] L1I_CACHES.non_null (0 ms) [----------] 1 test from L1I_CACHES (0 ms total) [----------] 13 tests from L1I_CACHE [ RUN ] L1I_CACHE.non_null [ OK ] L1I_CACHE.non_null (0 ms) [ RUN ] L1I_CACHE.non_zero_size [ OK ] L1I_CACHE.non_zero_size (0 ms) [ RUN ] L1I_CACHE.valid_size [ OK ] L1I_CACHE.valid_size (0 ms) [ RUN ] L1I_CACHE.non_zero_associativity [ OK ] L1I_CACHE.non_zero_associativity (0 ms) [ RUN ] L1I_CACHE.non_zero_partitions [ OK ] L1I_CACHE.non_zero_partitions (0 ms) [ RUN ] L1I_CACHE.non_zero_line_size [ OK ] L1I_CACHE.non_zero_line_size (0 ms) [ RUN ] L1I_CACHE.power_of_2_line_size [ OK ] L1I_CACHE.power_of_2_line_size (0 ms) [ RUN ] L1I_CACHE.reasonable_line_size [ OK ] L1I_CACHE.reasonable_line_size (0 ms) [ RUN ] L1I_CACHE.valid_flags [ OK ] L1I_CACHE.valid_flags (0 ms) [ RUN ] L1I_CACHE.non_inclusive [ OK ] L1I_CACHE.non_inclusive (0 ms) [ RUN ] L1I_CACHE.non_zero_processors [ OK ] L1I_CACHE.non_zero_processors (0 ms) [ RUN ] L1I_CACHE.valid_processors [ OK ] L1I_CACHE.valid_processors (0 ms) [ RUN ] L1I_CACHE.consistent_processors [ OK ] L1I_CACHE.consistent_processors (0 ms) [----------] 13 tests from L1I_CACHE (7 ms total) [----------] 1 test from L1D_CACHES_COUNT [ RUN ] L1D_CACHES_COUNT.within_bounds [ OK ] L1D_CACHES_COUNT.within_bounds (0 ms) [----------] 1 test from L1D_CACHES_COUNT (0 ms total) [----------] 1 test from L1D_CACHES [ RUN ] L1D_CACHES.non_null [ OK ] L1D_CACHES.non_null (0 ms) [----------] 1 test from L1D_CACHES (0 ms total) [----------] 13 tests from L1D_CACHE [ RUN ] L1D_CACHE.non_null [ OK ] L1D_CACHE.non_null (0 ms) [ RUN ] L1D_CACHE.non_zero_size [ OK ] L1D_CACHE.non_zero_size (0 ms) [ RUN ] L1D_CACHE.valid_size [ OK ] L1D_CACHE.valid_size (0 ms) [ RUN ] L1D_CACHE.non_zero_associativity [ OK ] L1D_CACHE.non_zero_associativity (0 ms) [ RUN ] L1D_CACHE.non_zero_partitions [ OK ] L1D_CACHE.non_zero_partitions (0 ms) [ RUN ] L1D_CACHE.non_zero_line_size [ OK ] L1D_CACHE.non_zero_line_size (0 ms) [ RUN ] L1D_CACHE.power_of_2_line_size [ OK ] L1D_CACHE.power_of_2_line_size (0 ms) [ RUN ] L1D_CACHE.reasonable_line_size [ OK ] L1D_CACHE.reasonable_line_size (0 ms) [ RUN ] L1D_CACHE.valid_flags [ OK ] L1D_CACHE.valid_flags (0 ms) [ RUN ] L1D_CACHE.non_inclusive [ OK ] L1D_CACHE.non_inclusive (0 ms) [ RUN ] L1D_CACHE.non_zero_processors [ OK ] L1D_CACHE.non_zero_processors (0 ms) [ RUN ] L1D_CACHE.valid_processors [ OK ] L1D_CACHE.valid_processors (0 ms) [ RUN ] L1D_CACHE.consistent_processors [ OK ] L1D_CACHE.consistent_processors (0 ms) [----------] 13 tests from L1D_CACHE (7 ms total) [----------] 1 test from L2_CACHES_COUNT [ RUN ] L2_CACHES_COUNT.within_bounds [ OK ] L2_CACHES_COUNT.within_bounds (0 ms) [----------] 1 test from L2_CACHES_COUNT (0 ms total) [----------] 1 test from L2_CACHES [ RUN ] L2_CACHES.non_null [ OK ] L2_CACHES.non_null (0 ms) [----------] 1 test from L2_CACHES (0 ms total) [----------] 12 tests from L2_CACHE [ RUN ] L2_CACHE.non_null [ OK ] L2_CACHE.non_null (0 ms) [ RUN ] L2_CACHE.non_zero_size [ OK ] L2_CACHE.non_zero_size (0 ms) [ RUN ] L2_CACHE.valid_size [ OK ] L2_CACHE.valid_size (0 ms) [ RUN ] L2_CACHE.non_zero_associativity [ OK ] L2_CACHE.non_zero_associativity (0 ms) [ RUN ] L2_CACHE.non_zero_partitions [ OK ] L2_CACHE.non_zero_partitions (0 ms) [ RUN ] L2_CACHE.non_zero_line_size [ OK ] L2_CACHE.non_zero_line_size (0 ms) [ RUN ] L2_CACHE.power_of_2_line_size [ OK ] L2_CACHE.power_of_2_line_size (0 ms) [ RUN ] L2_CACHE.reasonable_line_size [ OK ] L2_CACHE.reasonable_line_size (0 ms) [ RUN ] L2_CACHE.valid_flags [ OK ] L2_CACHE.valid_flags (0 ms) [ RUN ] L2_CACHE.non_zero_processors [ OK ] L2_CACHE.non_zero_processors (0 ms) [ RUN ] L2_CACHE.valid_processors [ OK ] L2_CACHE.valid_processors (0 ms) [ RUN ] L2_CACHE.consistent_processors [ OK ] L2_CACHE.consistent_processors (0 ms) [----------] 12 tests from L2_CACHE (6 ms total) [----------] 1 test from L3_CACHES_COUNT [ RUN ] L3_CACHES_COUNT.within_bounds [ OK ] L3_CACHES_COUNT.within_bounds (0 ms) [----------] 1 test from L3_CACHES_COUNT (0 ms total) [----------] 12 tests from L3_CACHE [ RUN ] L3_CACHE.non_null [ OK ] L3_CACHE.non_null (0 ms) [ RUN ] L3_CACHE.non_zero_size [ OK ] L3_CACHE.non_zero_size (0 ms) [ RUN ] L3_CACHE.valid_size [ OK ] L3_CACHE.valid_size (0 ms) [ RUN ] L3_CACHE.non_zero_associativity [ OK ] L3_CACHE.non_zero_associativity (0 ms) [ RUN ] L3_CACHE.non_zero_partitions [ OK ] L3_CACHE.non_zero_partitions (0 ms) [ RUN ] L3_CACHE.non_zero_line_size [ OK ] L3_CACHE.non_zero_line_size (0 ms) [ RUN ] L3_CACHE.power_of_2_line_size [ OK ] L3_CACHE.power_of_2_line_size (0 ms) [ RUN ] L3_CACHE.reasonable_line_size [ OK ] L3_CACHE.reasonable_line_size (0 ms) [ RUN ] L3_CACHE.valid_flags [ OK ] L3_CACHE.valid_flags (0 ms) [ RUN ] L3_CACHE.non_zero_processors [ OK ] L3_CACHE.non_zero_processors (0 ms) [ RUN ] L3_CACHE.valid_processors [ OK ] L3_CACHE.valid_processors (0 ms) [ RUN ] L3_CACHE.consistent_processors [ OK ] L3_CACHE.consistent_processors (0 ms) [----------] 12 tests from L3_CACHE (6 ms total) [----------] 1 test from L4_CACHES_COUNT [ RUN ] L4_CACHES_COUNT.within_bounds [ OK ] L4_CACHES_COUNT.within_bounds (0 ms) [----------] 1 test from L4_CACHES_COUNT (0 ms total) [----------] 12 tests from L4_CACHE [ RUN ] L4_CACHE.non_null [ OK ] L4_CACHE.non_null (0 ms) [ RUN ] L4_CACHE.non_zero_size [ OK ] L4_CACHE.non_zero_size (0 ms) [ RUN ] L4_CACHE.valid_size [ OK ] L4_CACHE.valid_size (0 ms) [ RUN ] L4_CACHE.non_zero_associativity [ OK ] L4_CACHE.non_zero_associativity (0 ms) [ RUN ] L4_CACHE.non_zero_partitions [ OK ] L4_CACHE.non_zero_partitions (0 ms) [ RUN ] L4_CACHE.non_zero_line_size [ OK ] L4_CACHE.non_zero_line_size (0 ms) [ RUN ] L4_CACHE.power_of_2_line_size [ OK ] L4_CACHE.power_of_2_line_size (0 ms) [ RUN ] L4_CACHE.reasonable_line_size [ OK ] L4_CACHE.reasonable_line_size (0 ms) [ RUN ] L4_CACHE.valid_flags [ OK ] L4_CACHE.valid_flags (0 ms) [ RUN ] L4_CACHE.non_zero_processors [ OK ] L4_CACHE.non_zero_processors (0 ms) [ RUN ] L4_CACHE.valid_processors [ OK ] L4_CACHE.valid_processors (0 ms) [ RUN ] L4_CACHE.consistent_processors [ OK ] L4_CACHE.consistent_processors (0 ms) [----------] 12 tests from L4_CACHE (6 ms total) [----------] Global test environment tear-down [==========] 132 tests from 28 test suites ran. (93 ms total) [ PASSED ] 132 tests. ``` with `cpu-info.exe` returning ``` Packages: 0: Snapdragon (TM) 8cx Gen 3 Microarchitectures: 4x Cortex-A78 4x Cortex-X1 Cores: 0: 1 processor (0), ARM Cortex-A78 1: 1 processor (1), ARM Cortex-A78 2: 1 processor (2), ARM Cortex-A78 3: 1 processor (3), ARM Cortex-A78 4: 1 processor (4), ARM Cortex-X1 5: 1 processor (5), ARM Cortex-X1 6: 1 processor (6), ARM Cortex-X1 7: 1 processor (7), ARM Cortex-X1 Logical processors: 0 1 2 3 4 5 6 7 ``` and `isa-info.exe` returning ``` Instruction sets: ARM v8.1 atomics: yes ARM v8.1 SQRDMLxH: yes ARM v8.2 FP16 arithmetics: yes ARM v8.2 FHM: no ARM v8.2 BF16: no ARM v8.2 Int8 dot product: yes ARM v8.2 Int8 matrix multiplication: no ARM v8.3 JS conversion: no ARM v8.3 complex: no SIMD extensions: ARM SVE: no ARM SVE 2: no Cryptography extensions: AES: yes SHA1: yes SHA2: yes PMULL: yes CRC32: yes ``` GitOrigin-RevId: 6543fec09b2f04ac4a666882998b534afc9c1349 Change-Id: I2639cc38addfb0dd5ff8bc3a2b19b57e35820ce1
cpuinfo is a library to detect essential for performance optimization information about host CPU.
Log processor name:
cpuinfo_initialize(); printf("Running on %s CPU\n", cpuinfo_get_package(0)->name);
Detect if target is a 32-bit or 64-bit ARM system:
#if CPUINFO_ARCH_ARM || CPUINFO_ARCH_ARM64 /* 32-bit ARM-specific code here */ #endif
Check if the host CPU supports ARM NEON
cpuinfo_initialize(); if (cpuinfo_has_arm_neon()) { neon_implementation(arguments); }
Check if the host CPU supports x86 AVX
cpuinfo_initialize(); if (cpuinfo_has_x86_avx()) { avx_implementation(arguments); }
Check if the thread runs on a Cortex-A53 core
cpuinfo_initialize(); switch (cpuinfo_get_current_core()->uarch) { case cpuinfo_uarch_cortex_a53: cortex_a53_implementation(arguments); break; default: generic_implementation(arguments); break; }
Get the size of level 1 data cache on the fastest core in the processor (e.g. big core in big.LITTLE ARM systems):
cpuinfo_initialize(); const size_t l1_size = cpuinfo_get_processor(0)->cache.l1d->size;
Pin thread to cores sharing L2 cache with the current core (Linux or Android)
cpuinfo_initialize(); cpu_set_t cpu_set; CPU_ZERO(&cpu_set); const struct cpuinfo_cache* current_l2 = cpuinfo_get_current_processor()->cache.l2; for (uint32_t i = 0; i < current_l2->processor_count; i++) { CPU_SET(cpuinfo_get_processor(current_l2->processor_start + i)->linux_id, &cpu_set); } pthread_setaffinity_np(pthread_self(), sizeof(cpu_set_t), &cpu_set);
If you would like to provide your project's build environment with the necessary compiler and linker flags in a portable manner, the library by default when built enables CPUINFO_BUILD_PKG_CONFIG
and will generate a pkg-config manifest (libcpuinfo.pc). Here are several examples of how to use it:
If you used your distro's package manager to install the library, you can verify that it is available to your build environment like so:
$ pkg-config --cflags --libs libcpuinfo -I/usr/include/x86_64-linux-gnu/ -L/lib/x86_64-linux-gnu/ -lcpuinfo
If you have installed the library from source into a non-standard prefix, pkg-config may need help finding it:
$ PKG_CONFIG_PATH="/home/me/projects/cpuinfo/prefix/lib/pkgconfig/:$PKG_CONFIG_PATH" pkg-config --cflags --libs libcpuinfo -I/home/me/projects/cpuinfo/prefix/include -L/home/me/projects/cpuinfo/prefix/lib -lcpuinfo
To use with the GNU Autotools include the following snippet in your project's configure.ac
:
# CPU INFOrmation library... PKG_CHECK_MODULES( [libcpuinfo], [libcpuinfo], [], [AC_MSG_ERROR([libcpuinfo missing...])]) YOURPROJECT_CXXFLAGS="$YOURPROJECT_CXXFLAGS $libcpuinfo_CFLAGS" YOURPROJECT_LIBS="$YOURPROJECT_LIBS $libcpuinfo_LIBS"
To use with Meson you just need to add dependency('libcpuinfo')
as a dependency for your executable.
project( 'MyCpuInfoProject', 'cpp', meson_version: '>=0.55.0' ) executable( 'MyCpuInfoExecutable', sources: 'main.cpp', dependencies: dependency('libcpuinfo') )
This project can be built using Bazel.
You can also use this library as a dependency to your Bazel project. Add to the WORKSPACE
file:
load("@bazel_tools//tools/build_defs/repo:git.bzl", "git_repository") git_repository( name = "org_pytorch_cpuinfo", branch = "master", remote = "https://github.com/Vertexwahn/cpuinfo.git", )
And to your BUILD
file:
cc_binary( name = "cpuinfo_test", srcs = [ # ... ], deps = [ "@org_pytorch_cpuinfo//:cpuinfo", ], )
To use with CMake use the FindPkgConfig module. Here is an example:
cmake_minimum_required(VERSION 3.6) project("MyCpuInfoProject") find_package(PkgConfig) pkg_check_modules(CpuInfo REQUIRED IMPORTED_TARGET libcpuinfo) add_executable(${PROJECT_NAME} main.cpp) target_link_libraries(${PROJECT_NAME} PkgConfig::CpuInfo)
To use within a vanilla makefile, you can call pkg-config directly to supply compiler and linker flags using shell substitution.
CFLAGS=-g3 -Wall -Wextra -Werror ... LDFLAGS=-lfoo ... ... CFLAGS+= $(pkg-config --cflags libcpuinfo) LDFLAGS+= $(pkg-config --libs libcpuinfo)
/proc/cpuinfo
on ARMro.chipname
, ro.board.platform
, ro.product.board
, ro.mediatek.platform
, ro.arch
properties (Android)dmesg
) on ARM Linux/proc/cpuinfo
on 32-bit ARM EABI (Linux)FPSID
and WCID
registers (32-bit ARM)getauxval
(Linux/ARM)/proc/self/auxv
(Android/ARM)/proc/cpuinfo
(Linux/pre-ARMv7)sysctlbyname
(Mach)typology
directories (ARM/Linux)cache
directories (Linux)GetLogicalProcessorInformationEx
on ARM64 Windows/proc/cpuinfo
(Linux)host_info
(Mach)GetLogicalProcessorInformationEx
(Windows)