83eed0a886
Changes include: * CPU check has been broken up into a number of small libraries * BoringSSL option has been removed * Better abseil integration
73 lines
2.3 KiB
Markdown
73 lines
2.3 KiB
Markdown
# CPU Check
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CPU torture test designed for SMP systems, attempting to find CPU hardware faults, focusing primarily on the x86_64 architecture.
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The basic operation is to:
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* Run threads with affinity fixed to each logical CPU.
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* Generate a chunk of random data, either dictionary based text, or random binary data.
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* Run a number of checksum/hash algorithms over the data, store their results.
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* Compress the data via one of (zlib, ...).
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* Encrypt the data via AES-256-GCM.
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* Copy the data ('rep movsb' on x86, else memcpy).
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* Switch affinity to an alternate logical CPU.
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* Decrypt.
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* Decompress.
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* Run checksum/hash algorithms and compare with stored results.
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Algorithms are chosen to exercise various hardware extensions. Eg. on x86_64, SSE4.2, AVX, etc.
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## Prerequisites:
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Designed to run under Unix/Linux OS.
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* cmake: https://cmake.org/
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* zlib
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* OpenSSL
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* Abseil-cpp: https://github.com/abseil/abseil-cpp
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Note that Abseil must be built with the C++17 standard and include the
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StatusOr package (release 2020_09_23 or later).
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## Building
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```
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sh$ git clone --recursive https://github.com/google/cpu-check.git
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sh$ cd cpu-check
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sh$ mkdir build
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sh$ cd build
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sh$ cmake ..
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sh$ make
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```
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## Options
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Some options have been implememented that affect the build, which may be passed
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to cmake via, eg:
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```cmake -DCMAKE_BUILD_TYPE=(Debug|Release)```
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* CMAKE_BUILD_TYPE=(Release|Debug)
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* USE_CLANG=(ON|OFF)
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* BUILD_STATIC=(ON|OFF)
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## TODO:
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* Use git submodules for:
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* highwayhash: https://github.com/google/highwayhash
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* crc32c: https://github.com/google/crc32c
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* cityhash: https://github.com/google/cityhash
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* brotli: https://github.com/google/brotli
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* gipfeli: https://github.com/google/gipfeli
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* Expand encryption coverage - find those algorithms that stress the HW.
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* Flags to enable/disable steps, eg. encryption.
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* Flags controlling min/max buffer size.
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* Use cpuid to dynamically select appropriate instruction set extensions.
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* Query ACPI/cpuid for more meaningful CPU identification.
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* Extra x86_64 instruction coverage:
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* movnti (SSE2 mov doubleword with non-temporal hint)
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* prefetch*
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* movbe (mov with byte swap)
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* Consider floating point tests?
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* Keep stats on corruptions (eg. buffer lengths/alignments, detection means (crc32), etc).
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* Try to narrow down corruptions automatically.
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