Commit 1318b3e4 authored Jul 05, 2022 by Jim Harris

build: add -mno-avx512f to x86_64 builds



valgrind doesn't support AVX-512, and latest compilers
will use newfangled instructions to do simple
integer-to-fp conversions which then break valgrind.

The only place where we would really use or need
AVX-512 is in ISA-L, so disabling those instructions
in SPDK is fine.

Signed-off-by: Jim Harris <james.r.harris@intel.com>
Change-Id: I48f3dd4f1b5813485a92c81d01e513c950ada205

Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/13554


Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Artur Paszkiewicz <artur.paszkiewicz@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Reviewed-by: Konrad Sztyber <konrad.sztyber@intel.com>

parent 0098e636

mk/spdk.common.mk

+7 −0

Original line number	Diff line number	Diff line
		@@ -70,6 +70,13 @@ else
		COMMON_CFLAGS += -march=$(TARGET_ARCHITECTURE)
		endif

		ifeq ($(TARGET_MACHINE),x86_64)
		# Don't use AVX-512 instructions in SPDK code - it breaks Valgrind for
		# some cases where compiler decides to hyper-optimize a relatively
		# simple operation (like int-to-float converstion) using AVX-512
		COMMON_CFLAGS += -mno-avx512f
		endif

		ifeq ($(CONFIG_WERROR), y)
		COMMON_CFLAGS += -Werror
		endif