Tested-by: Han, Yingya <[email protected]> Best Regards, Yingya -----Original Message----- From: Richardson, Bruce <[email protected]> Sent: Monday, October 12, 2020 10:52 PM To: [email protected] Cc: Han, YingyaX <[email protected]>; Ananyev, Konstantin <[email protected]>; Tu, Lijuan <[email protected]>; Richardson, Bruce <[email protected]> Subject: [PATCH] build: fix memcpy behaviour regression
When testing on some x86 platforms, code compiled with meson was observed running at a different power-license level to that compiled with make. This is due to the fact that meson auto-detects the instruction sets available on the system and enabled AVX512 rte_memcpy when AVX512 was available, while on make, a build time AVX-512 flag needed to be explicitly set to enable that AVX512 rte_memcpy code path. In the absense of runtime path selection for rte_memcpy - which is complicated by it being a static inline function in a header file - we can fix this behaviour regression by similarly having a build-time option which must be set to enable the AVX-512 memcpy path.
