> -----Original Message----- > From: Zhang, Qi Z > Sent: Wednesday, January 10, 2018 3:15 PM > To: Richardson, Bruce; Xing, Beilei > Cc: dev@dpdk.org; Zhang, Helin; Yigit, Ferruh > Subject: RE: [PATCH v2 0/2] AVX2 Vectorized Rx/Tx functions for i40e > > > > > -----Original Message----- > > From: Richardson, Bruce > > Sent: Tuesday, January 9, 2018 10:33 PM > > To: Zhang, Qi Z <qi.z.zh...@intel.com>; Xing, Beilei > > <beilei.x...@intel.com> > > Cc: dev@dpdk.org; Zhang, Helin <helin.zh...@intel.com>; Yigit, Ferruh > > <ferruh.yi...@intel.com>; Richardson, Bruce > > <bruce.richard...@intel.com> > > Subject: [PATCH v2 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. > > > > V2: > > * Fixed incorrect config variable reference in makefile > > * Added missing stub function for when vector drivers are disabled > > * Added missing references to the new functions when checking for vector > > code paths, e.g. for ring tear-down > > > > 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 | 66 ++- > > drivers/net/i40e/i40e_rxtx.h | 6 + > > drivers/net/i40e/i40e_rxtx_vec_avx2.c | 792 > > ++++++++++++++++++++++++++++++++++ > > 4 files changed, 880 insertions(+), 3 deletions(-) create mode > > 100644 drivers/net/i40e/i40e_rxtx_vec_avx2.c > > > > -- > > 2.14.3 > > Acked-by: Qi Zhang <qi.z.zh...@intel.com> Applied to dpdk-next-net-intel, with minor commit log changes. Thanks!
/Helin
