From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from youngberry.canonical.com (youngberry.canonical.com [91.189.89.112]) by dpdk.org (Postfix) with ESMTP id 127DB8D89 for ; Tue, 1 Dec 2015 15:26:56 +0100 (CET) Received: from [10.172.196.172] (helo=Weiknorze.fritz.box) by youngberry.canonical.com with esmtpsa (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.76) (envelope-from ) id 1a3ltP-0001zc-Tf; Tue, 01 Dec 2015 14:26:55 +0000 From: Christian Ehrhardt To: dev@dpdk.org Date: Tue, 1 Dec 2015 15:26:54 +0100 Message-Id: <1448980014-31548-1-git-send-email-christian.ehrhardt@canonical.com> X-Mailer: git-send-email 1.9.1 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Subject: [dpdk-dev] [PATCH] mk: bump minimum march in default machine X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: patches and discussions about DPDK List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 01 Dec 2015 14:26:56 -0000 While playing with building 2.2-rc2 I found that our usual way didn't work anymore. We usually configured "make config T=x86_64-native-linuxapp-gcc" but then set CONFIG_RTE_MACHINE="default" to get something like the "lowest acceptable build" but with that wide CPU copatibility. I found that with DPDK 2.2 this fails with issues like: In file included from /usr/lib/gcc/x86_64-linux-gnu/5/include/immintrin.h:37:0, from dpdk-2.2.0-rc2/lib/librte_sched/rte_sched.c:56: dpdk-2.2.0-rc2/lib/librte_sched/rte_sched.c: In function ‘grinder_pipe_exists’: /usr/lib/gcc/x86_64-linux-gnu/5/include/smmintrin.h:67:1: error: inlining failed in call to always_inline ‘_mm_testz_si128’: target specific option mismatch _mm_testz_si128 (__m128i __M, __m128i __V) ^ This is a hard need on newer SSE4.x features which are not given with march=core2. So if nehalem (the next march level which has SSE4.x) is the new minimum let us set this in the default machine config. Signed-off-by: Christian Ehrhardt --- [diffstat] rte.vars.mk | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) [diff] diff --git a/mk/machine/default/rte.vars.mk b/mk/machine/default/rte.vars.mk index 53c6af6..170d880 100644 --- a/mk/machine/default/rte.vars.mk +++ b/mk/machine/default/rte.vars.mk @@ -55,4 +55,4 @@ # CPU_LDFLAGS = # CPU_ASFLAGS = -MACHINE_CFLAGS += -march=core2 +MACHINE_CFLAGS += -march=nehalem