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authorDamjan Marion <damarion@cisco.com>2016-05-11 23:07:18 +0200
committerDamjan Marion <damarion@cisco.com>2016-05-19 18:14:38 +0200
commit1c80e831b728ab378949714d5059a0b5b1822a0a (patch)
treee4f3ecfee143f7dee0e9905570d41ca3ee345c83 /dpdk
parent82e29c455833b5b12e04c89d2dec1106b499e6b0 (diff)
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 <damarion@cisco.com>
Diffstat (limited to 'dpdk')
-rw-r--r--dpdk/Makefile3
1 files changed, 2 insertions, 1 deletions
diff --git a/dpdk/Makefile b/dpdk/Makefile
index 165058d9..b7e1e097 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