From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pf0-f171.google.com (mail-pf0-f171.google.com [209.85.192.171]) by dpdk.org (Postfix) with ESMTP id B9FC75A86 for ; Fri, 18 Dec 2015 18:33:35 +0100 (CET) Received: by mail-pf0-f171.google.com with SMTP id u7so5560574pfb.1 for ; Fri, 18 Dec 2015 09:33:35 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=networkplumber-org.20150623.gappssmtp.com; s=20150623; h=date:from:to:cc:subject:message-id:in-reply-to:references :mime-version:content-type:content-transfer-encoding; bh=zH4mHAdBvSdtnQA1jY73UfaTqbxVASEG3/VUpl/U9Cc=; b=eUMLuGztalZUnKl3+bzxLtA+Z6nnjGvQCXyLmW/GiBV6qGQ/gTumDSkvwf8Vr/qTFv znv1kSROe7BcW456PqPeD1SIngM/RxLgrm4dbURmlkFl33/Js/9QiBTWtZkGBIouw6nJ 5BVDV4mHd3ZdXybDJ8staLujXvuzrCRRFovDcSvcECNE8Fc2kRGVNjcDEIDRzrVM5ESN lL2fBVc7VGA9YwRXj3B39EoHzVhsk0RAZ9M4rsnu7RGe85vckJ2ydtmiz0DU4PlpK3dZ Bzacahl6GJ374EQfL7lSAi6RKwmNSZkrIifrk/0kKuLt4v9OEKAZ5xaitnktC1VDIcAq Qp7Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:date:from:to:cc:subject:message-id:in-reply-to :references:mime-version:content-type:content-transfer-encoding; bh=zH4mHAdBvSdtnQA1jY73UfaTqbxVASEG3/VUpl/U9Cc=; b=eJV/digTFKxu82Cj8HtaHsPLr7Gx5V6E+Ye6+kll3G0y76SvpdI9g/vfCTUP3mQQms Zv3OsvaAifFJyI/PN+lyAPGXjWZrKg9IyYtC/8xOXxoRLrUAFm110qtd1SY7KU/UnbUg VCXfjDD2P95cMb99VnB4qRxpLAWwACYFIoHdlvtPlKjara17TvLIkO5m3gT5tS6Vhl6a 7nSEfeiHzlANwVvcTxInTXPmSNCwPEkL4mPzZuZqV5QkuNyo7gy0XgcSI0qfSi/f1Mr7 7A+lNcVcpdLeparnU/JwmVBmUb8hzA832f6hk0HMsPyB661NJoRfJqUc0/L6/hKft3Tj xd0Q== X-Gm-Message-State: ALoCoQnjYtDwZagf0IrGXjd58UKKP/51eK1o/cjdGi9XKB0sOP3kpbv86BKp46gB7ragLsHxWkGu/7Q1MBKZQq56HPU+u2PPzw== X-Received: by 10.98.14.211 with SMTP id 80mr7192002pfo.76.1450460015193; Fri, 18 Dec 2015 09:33:35 -0800 (PST) Received: from xeon-e3 (static-50-53-82-155.bvtn.or.frontiernet.net. [50.53.82.155]) by smtp.gmail.com with ESMTPSA id g20sm15974642pfd.55.2015.12.18.09.33.34 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 18 Dec 2015 09:33:35 -0800 (PST) Date: Fri, 18 Dec 2015 09:33:42 -0800 From: Stephen Hemminger To: "Xie, Huawei" Message-ID: <20151218093342.78fc5f72@xeon-e3> In-Reply-To: References: <1450098032-21198-1-git-send-email-sshukla@mvista.com> <1450098032-21198-2-git-send-email-sshukla@mvista.com> <20151217152435.3c733ac1@xeon-e3> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Cc: "dev@dpdk.org" Subject: Re: [dpdk-dev] [ [PATCH v2] 01/13] virtio: Introduce config RTE_VIRTIO_INC_VECTOR X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: patches and discussions about DPDK List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 18 Dec 2015 17:33:36 -0000 On Fri, 18 Dec 2015 09:52:29 +0000 "Xie, Huawei" wrote: > > low level SSE bit twiddling. > Hi Stephen: > We only did SSE twiddling to RX, which almost doubles the performance > comparing to normal path in virtio/vhost performance test case. Indirect > and any layout feature enabling are mostly for TX. We also did some > optimization for single segment and non-offload case in TX, without > using SSE, which also gives ~60% performance improvement, in Qian's > result. My optimization is mostly for single segment and non-offload > case, which i calls simple rx/tx. > I plan to add virtio/vhost performance benchmark so that we could easily > measure the performance difference for each patch. > > Indirect and any layout features are useful for multiple segment > transmitted packet mbufs. I had acked your patch at the first time, and > thought it is applied. I don't understand why you say it is ignored by > Intel. Sorry, did not mean to blame Intel, ... more that why didn't it get in 2.2? It turns out any layout/indirect helps all transmits because they can then take a single tx descriptor rather than multiple.