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| author | Harry van Haaren <harry.van.haaren@intel.com> | 2021-07-09 15:58:24 +0000 |
|---|---|---|
| committer | Ian Stokes <ian.stokes@intel.com> | 2021-07-09 17:15:08 +0100 |
| commit | 1e314891340d9b964f2da975936974b09912c225 (patch) | |
| tree | 7f39769f0bf9bef23985b4b27ef42d7285f83f89 /lib/dpdk.c | |
| parent | 60c9e1a2f3432e785de3e86a05bf5f7c5c4b1aa8 (diff) | |
| download | openvswitch-1e314891340d9b964f2da975936974b09912c225.tar.gz | |
dpcls-avx512: Enable avx512 vector popcount instruction.
This commit enables the AVX512-VPOPCNTDQ Vector Popcount
instruction. This instruction is not available on every CPU
that supports the AVX512-F Foundation ISA, hence it is enabled
only when the additional VPOPCNTDQ ISA check is passed.
The vector popcount instruction is used instead of the AVX512
popcount emulation code present in the avx512 optimized DPCLS today.
It provides higher performance in the SIMD miniflow processing
as that requires the popcount to calculate the miniflow block indexes.
Signed-off-by: Harry van Haaren <harry.van.haaren@intel.com>
Acked-by: Flavio Leitner <fbl@sysclose.org>
Signed-off-by: Ian Stokes <ian.stokes@intel.com>
Diffstat (limited to 'lib/dpdk.c')
| -rw-r--r-- | lib/dpdk.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/lib/dpdk.c b/lib/dpdk.c index 8807de54a..9de2af58e 100644 --- a/lib/dpdk.c +++ b/lib/dpdk.c @@ -706,6 +706,7 @@ dpdk_get_cpu_has_isa(const char *arch, const char *feature) #if __x86_64__ /* CPU flags only defined for the architecture that support it. */ CHECK_CPU_FEATURE(feature, "avx512f", RTE_CPUFLAG_AVX512F); + CHECK_CPU_FEATURE(feature, "avx512vpopcntdq", RTE_CPUFLAG_AVX512VPOPCNTDQ); CHECK_CPU_FEATURE(feature, "bmi2", RTE_CPUFLAG_BMI2); #endif |