From mboxrd@z Thu Jan 1 00:00:00 1970 From: jamal Subject: Re: rps perfomance WAS(Re: rps: question Date: Wed, 14 Apr 2010 16:22:48 -0400 Message-ID: <1271276568.4567.59.camel@bigi> References: <1265568122.3688.36.camel@bigi> <65634d661002072158r48ec15cag1ca58e704114a358@mail.gmail.com> <1265641748.3688.56.camel@bigi> <1271245986.3943.55.camel@bigi> <1271268242.16881.1719.camel@edumazet-laptop> <1271271222.4567.51.camel@bigi> <20100414124426.6aee95c3@nehalam> Reply-To: hadi@cyberus.ca Mime-Version: 1.0 Content-Type: text/plain Content-Transfer-Encoding: 7bit Cc: Eric Dumazet , Tom Herbert , netdev@vger.kernel.org, robert@herjulf.net, David Miller , Changli Gao , Andi Kleen To: Stephen Hemminger Return-path: Received: from mail-pv0-f174.google.com ([74.125.83.174]:36859 "EHLO mail-pv0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754582Ab0DNUWv (ORCPT ); Wed, 14 Apr 2010 16:22:51 -0400 Received: by pva18 with SMTP id 18so387624pva.19 for ; Wed, 14 Apr 2010 13:22:51 -0700 (PDT) In-Reply-To: <20100414124426.6aee95c3@nehalam> Sender: netdev-owner@vger.kernel.org List-ID: On Wed, 2010-04-14 at 12:44 -0700, Stephen Hemminger wrote: > RPS might also interact with the core turbo boost functionality on Intel chips. > Newer chips will make a single core faster if other core can be kept idle. how well does it work with Linux? Sounds like all i need to do is turn on some BIOS feature. One of the negatives with multiqueue nics is because the core selection is static, you could end up overloading one core while others stay idle. This seems to steal cycle capacity from the idle cores and gives it to the busy cpus. nice. So i see it as a boost to multiqueue. cheers, jamal