From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Michael S. Tsirkin" Subject: Re: [PATCH RFC net-next] virtio_net: refill buffer right after being used Date: Wed, 3 Aug 2011 23:30:20 +0300 Message-ID: <20110803203020.GB19501@redhat.com> References: <1311979448.24300.28.camel@localhost.localdomain> <1311980131.24300.30.camel@localhost.localdomain> <1312089375.23194.11.camel@localhost.localdomain> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: Mike Waychison , Rusty Russell , kvm@vger.kernel.org, virtualization@lists.osdl.org, netdev@vger.kernel.org To: Shirley Ma Return-path: Received: from mx1.redhat.com ([209.132.183.28]:26079 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755616Ab1HCUaT (ORCPT ); Wed, 3 Aug 2011 16:30:19 -0400 Content-Disposition: inline In-Reply-To: <1312089375.23194.11.camel@localhost.localdomain> Sender: kvm-owner@vger.kernel.org List-ID: On Sat, Jul 30, 2011 at 10:16:15PM -0700, Shirley Ma wrote: > It averages the latency between each receive by filling only one set of > buffers vs. either none buffers or 1/2 ring size buffers fill between > receives. I see how the overhead of allocating memory is spread more evenly. Does this actually help some workloads?