From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1161593AbcFBTIK (ORCPT ); Thu, 2 Jun 2016 15:08:10 -0400 Received: from shards.monkeyblade.net ([149.20.54.216]:57962 "EHLO shards.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1161434AbcFBTIH (ORCPT ); Thu, 2 Jun 2016 15:08:07 -0400 Date: Thu, 02 Jun 2016 12:08:06 -0700 (PDT) Message-Id: <20160602.120806.2233781548139724198.davem@davemloft.net> To: jasowang@redhat.com Cc: mst@redhat.com, kvm@vger.kernel.org, virtualization@lists.linux-foundation.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH V3 0/2] vhost_net polling optimization From: David Miller In-Reply-To: <1464760594-30326-1-git-send-email-jasowang@redhat.com> References: <1464760594-30326-1-git-send-email-jasowang@redhat.com> X-Mailer: Mew version 6.7 on Emacs 24.5 / Mule 6.0 (HANACHIRUSATO) Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Greylist: Sender succeeded SMTP AUTH, not delayed by milter-greylist-4.5.12 (shards.monkeyblade.net [149.20.54.216]); Thu, 02 Jun 2016 12:08:06 -0700 (PDT) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Jason Wang Date: Wed, 1 Jun 2016 01:56:32 -0400 > This series tries to optimize vhost_net polling at two points: > > - Stop rx polling for reduicng the unnecessary wakeups during > handle_rx(). > - Conditonally enable tx polling for reducing the unnecessary > traversing and spinlock touching. > > Test shows about 17% improvement on rx pps. > > Please review > > Changes from V2: > - Don't enable rx vq if we meet an err or rx vq is empty > Changes from V1: > - use vhost_net_disable_vq()/vhost_net_enable_vq() instead of open > coding. > - Add a new patch for conditionally enable tx polling. Michael, please review this patch series. Thanks.