From: Bruce Richardson <bruce.richardson@intel.com>
To: jingjing.wu@intel.com, beilei.xing@intel.com
Cc: dev@dpdk.org
Subject: Re: [dpdk-dev] [PATCH 0/2] AVX2 Vectorized Rx/Tx functions for i40e
Date: Thu, 23 Nov 2017 16:56:52 +0000 [thread overview]
Message-ID: <20171123165652.GA13188@bricha3-MOBL3.ger.corp.intel.com> (raw)
In-Reply-To: <20171123165314.168786-1-bruce.richardson@intel.com>
On Thu, Nov 23, 2017 at 04:53:12PM +0000, Bruce Richardson wrote:
> 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.
>
> Bruce Richardson (2):
> net/i40e: add AVX2 Tx function
> net/i40e: add AVX2 Rx function
>
Just also to note that this set has quite a number of checkpatch
warnings about long lines. These were deliberately left in, as the lines
are not significantly over 80 characters, and I felt that splitting them
would have hurt readability.
/Bruce
next prev parent reply other threads:[~2017-11-23 16:56 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-11-23 16:53 Bruce Richardson
2017-11-23 16:53 ` [dpdk-dev] [PATCH 1/2] net/i40e: add AVX2 Tx function Bruce Richardson
2017-11-29 2:13 ` Ferruh Yigit
2017-11-29 10:02 ` Bruce Richardson
2017-11-23 16:53 ` [dpdk-dev] [PATCH 2/2] net/i40e: add AVX2 Rx function Bruce Richardson
2017-11-23 16:56 ` Bruce Richardson [this message]
2017-11-27 10:45 ` [dpdk-dev] [PATCH 0/2] AVX2 Vectorized Rx/Tx functions for i40e Zhang, Qi Z
2018-01-09 14:32 ` [dpdk-dev] [PATCH v2 " Bruce Richardson
2018-01-09 14:32 ` [dpdk-dev] [PATCH v2 1/2] net/i40e: add AVX2 Tx function Bruce Richardson
2018-01-09 14:32 ` [dpdk-dev] [PATCH v2 2/2] net/i40e: add AVX2 Rx function Bruce Richardson
2018-01-09 16:30 ` [dpdk-dev] [PATCH v2 0/2] AVX2 Vectorized Rx/Tx functions for i40e John Fastabend
2018-01-10 9:27 ` Richardson, Bruce
2018-01-10 14:25 ` Vincent JARDIN
2018-01-10 14:38 ` Bruce Richardson
2018-01-10 7:11 ` Li, Xiaoyun
2018-01-10 7:14 ` Zhang, Qi Z
2018-01-10 13:49 ` Zhang, Helin
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