From mboxrd@z Thu Jan 1 00:00:00 1970 From: Yongseok Koh Subject: [PATCH] build: disable compiler AVX512F support Date: Tue, 23 Oct 2018 21:23:28 +0000 Message-ID: <20181023212318.43082-1-yskoh@mellanox.com> Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Cc: "dev@dpdk.org" , Shahaf Shuler , Yongseok Koh , "stable@dpdk.org" To: Thomas Monjalon , "bruce.richardson@intel.com" Return-path: Content-Language: en-US List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" This is a workaround to prevent a crash, which might be caused by optimization of newer gcc (7.3.0) on Intel Skylake. Bugzilla ID: 97 Cc: stable@dpdk.org Signed-off-by: Yongseok Koh --- config/x86/meson.build | 5 +++++ mk/rte.cpuflags.mk | 5 +++++ 2 files changed, 10 insertions(+) diff --git a/config/x86/meson.build b/config/x86/meson.build index 33efb5e547..e10ba872ac 100644 --- a/config/x86/meson.build +++ b/config/x86/meson.build @@ -47,6 +47,11 @@ endif if cc.get_define('__AVX512F__', args: march_opt) !=3D '' dpdk_conf.set('RTE_MACHINE_CPUFLAG_AVX512F', 1) compile_time_cpuflags +=3D ['RTE_CPUFLAG_AVX512F'] +else +# disable compiler's AVX512F support as a workaround for Bug 97 + if cc.has_argument('-mavx512f') + machine_args +=3D '-mno-avx512f' + endif endif =20 dpdk_conf.set('RTE_CACHE_LINE_SIZE', 64) diff --git a/mk/rte.cpuflags.mk b/mk/rte.cpuflags.mk index 43ed84155b..8fdb0cc2c3 100644 --- a/mk/rte.cpuflags.mk +++ b/mk/rte.cpuflags.mk @@ -68,6 +68,11 @@ endif ifneq ($(filter $(AUTO_CPUFLAGS),__AVX512F__),) ifeq ($(CONFIG_RTE_ENABLE_AVX512),y) CPUFLAGS +=3D AVX512F +else +# disable compiler's AVX512F support as a workaround for Bug 97 +ifeq ($(shell $(CC) --target-help | grep -q mavx512f && echo 1), 1) +MACHINE_CFLAGS +=3D -mno-avx512f +endif endif endif =20 --=20 2.11.0