diff options
| author |   Damjan Marion <damarion@cisco.com> | 2016-05-11 23:07:18 +0200 |
|---|---|---|
| committer | Damjan Marion <damarion@cisco.com> | 2016-05-19 18:14:38 +0200 |
| commit | 1c80e831b728ab378949714d5059a0b5b1822a0a (patch) | |
| tree | e4f3ecfee143f7dee0e9905570d41ca3ee345c83 /dpdk | |
| parent | 82e29c455833b5b12e04c89d2dec1106b499e6b0 (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/Makefile | 3 |
1 files changed, 2 insertions, 1 deletions
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 |