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Add 64-bit new machine (intel-skylake-64) with -march=skylake and avx2 instruction-set set up. We do see a qemu-usermode failure at build time, on setup of avx2 instruction-set as QEMU does not support AVX instruction set. Check this: https://bugs.launchpad.net/qemu/+bug/1818075 So to bypass this issue disabling qemu-usermode for intel-skylake-64 machine. Due to above limitation and in order to not affecting existing machines, this new machine is being proposed to add. A quick performance comparision between intel-corei7-64 vs intel-skylake-64 machines Measurements are in time, taken by the benchmark tests. Less is better. Test/Benchmark intel-corei7-64 intel-skylake-64 (1) CppPerformanceBenchmarks (Test: Math Library) (1st) 5m 15.70s 4m 36.39s (2nd) 5m 16.37s 4m 36.51s (3rd) 5m 15.54s 4m 37.80s CppPerformanceBenchmarks is a set of C++ compiler performance benchmarks. (2) AOBench (1st) 0m 35.07s 0m 28.74s (2nd) 0m 34.90s 0m 28.72s (3rd) 0m 34.85s 0m 28.89s AOBench is a lightweight ambient occlusion renderer, written in C. The test profile is using a size of 2048 x 2048. (3) C-Ray (1st) 320 seconds 232 seconds (2nd) 320 seconds 232 seconds (3rd) 321 seconds 232 seconds C-Ray, a simple raytracer designed to test the floating-point CPU performance. For this patch, 'bitbake world' gets successfully built with latest poky master. Signed-off-by: Naveen Saini <naveen.kumar.saini@intel.com> Signed-off-by: Anuj Mittal <anuj.mittal@intel.com>
29 lines
1023 B
HTML
29 lines
1023 B
HTML
# Settings for the GCC(1) cpu-type "skylake":
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#
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# Intel Skylake CPU with 64-bit extensions, MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1,
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# SSE4.2, AVX, AVX2 and POPCNT instruction set support.
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#
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# This tune is recommended for Intel Skylake CPU (and beyond).
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#
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DEFAULTTUNE ?= "skylake-64"
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# Include the previous tune to pull in PACKAGE_EXTRA_ARCHS
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require conf/machine/include/tune-core2.inc
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# Extra tune features
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TUNEVALID[skylake] = "Enable skylake specific processor optimizations"
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TUNE_CCARGS .= "${@bb.utils.contains('TUNE_FEATURES', 'skylake', ' -march=skylake -mtune=generic -mfpmath=sse -mavx2', '', d)}"
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# Extra tune selections
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AVAILTUNES += "skylake-64"
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TUNE_FEATURES_tune-skylake-64 = "${TUNE_FEATURES_tune-x86-64} skylake"
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BASE_LIB_tune-skylake-64 = "lib64"
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TUNE_PKGARCH_tune-skylake-64 = "skylake-64"
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PACKAGE_EXTRA_ARCHS_tune-skylake-64 = "${PACKAGE_EXTRA_ARCHS_tune-core2-64} skylake-64"
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QEMU_EXTRAOPTIONS_skylake-64 = " -cpu Skylake-Client"
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# Disable QEMU user
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MACHINE_FEATURES_remove = "qemu-usermode"
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