From 1c80e831b728ab378949714d5059a0b5b1822a0a Mon Sep 17 00:00:00 2001 From: Damjan Marion Date: Wed, 11 May 2016 23:07:18 +0200 Subject: Add support for multiple microarchitectures in single binary * compiler -march= parameter is changed from native to corei7 so code is always genereted with instructions which are available on the Nehalem microarchitecture (up to SSE4.2) * compiler -mtune= parameter is added so code is optimized for corei7-avx which equals to Sandy Bridge microarchitecture * set of macros is added which allows run-time detection of available cpu instructions (e.g. clib_cpu_supports_avx()) * set of macros is added which allows us to clone graph node funcitons where cloned function is optmized for different microarchitecture Those macros are using following attributes: __attribute__((flatten)) __attribute__((target("arch=core-avx2))) I.e. If applied to foo_node_fn() macro will generate cloned functions foo_node_fn_avx2() and foo_node_fn_avx512() (future) It will also generate function void * foo_node_fn_multiarch_select() which detects available instruction set and returns pointer to the best matching function clone. Change-Id: I2dce0ac92a5ede95fcb56f47f3d1f3c4c040bac0 Signed-off-by: Damjan Marion --- dpdk/Makefile | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'dpdk/Makefile') diff --git a/dpdk/Makefile b/dpdk/Makefile index 165058d9530..b7e1e097212 100644 --- a/dpdk/Makefile +++ b/dpdk/Makefile @@ -19,6 +19,7 @@ DPDK_INSTALL_DIR ?= $(CURDIR)/_install DPDK_PKTMBUF_HEADROOM ?= 128 DPDK_DOWNLOAD_DIR ?= $(HOME)/Downloads DPDK_MARCH ?= native +DPDK_TUNE ?= generic DPDK_DEBUG ?= n B := $(DPDK_BUILD_DIR) @@ -51,7 +52,7 @@ DPDK_CPU_LDFLAGS := DPDK_EXTRA_LDFLAGS := -g ifeq ($(DPDK_DEBUG),n) -DPDK_EXTRA_CFLAGS := -g +DPDK_EXTRA_CFLAGS := -g -mtune=$(DPDK_TUNE) else DPDK_EXTRA_CFLAGS := -g -O0 endif -- cgit 1.2.3-korg