> -----Original Message----- > From: dev [mailto:dev-boun...@dpdk.org] On Behalf Of Bruce Richardson > Sent: Friday, November 24, 2017 12:53 AM > To: Wu, Jingjing <jingjing...@intel.com>; Xing, Beilei <beilei.x...@intel.com> > Cc: dev@dpdk.org; Richardson, Bruce <bruce.richard...@intel.com> > Subject: [dpdk-dev] [PATCH 0/2] AVX2 Vectorized Rx/Tx functions for i40e > > This patch adds an AVX2 vectorized path to the i40e driver, based on the > existing SSE4.2 version. Using AVX2 instructions gives better performance > than the SSE version, though the percentage increase depends on the exact > settings used. For example: > > * Using 16B rather than 32B descriptors gives the biggest benefit since > 2 descriptors at a time can be read, rather than just 1 when 32B ones > are used. > * Bigger burst sizes for RX gives improved performance - while we see an > improvement with testpmd with the default burst size of 32, burst sizes > of up to 128 give further improvements > * In my testing, most of the improvement comes from faster processing on > the RX path, though the improved TX also gives benefit. > > This has been tested on a system with CPU: "Intel(R) Xeon(R) Gold 6154 CPU > @ 3.00GHz", and I've focused on testing with Rx ring sizes of approx 1k - > generally --rxd=1024 and --txd=512, rather than the defaults which tend to > give poorer zero-loss performance due to the smaller amount of buffering.
Reviewed-by: Qi Zhang <qi.z.zh...@intel.com> Manipulated the instructions, no issue be found. The patch is wonderful!. Thanks Qi > > Bruce Richardson (2): > net/i40e: add AVX2 Tx function > net/i40e: add AVX2 Rx function > > drivers/net/i40e/Makefile | 19 + > drivers/net/i40e/i40e_rxtx.c | 31 ++ > drivers/net/i40e/i40e_rxtx.h | 6 + > drivers/net/i40e/i40e_rxtx_vec_avx2.c | 792 > ++++++++++++++++++++++++++++++++++ > 4 files changed, 848 insertions(+) > create mode 100644 drivers/net/i40e/i40e_rxtx_vec_avx2.c > > -- > 2.13.6
