From mboxrd@z Thu Jan 1 00:00:00 1970 From: Eric Dumazet Subject: Re: [PATCH] rps: make distributing packets fairly among all the online CPUs default Date: Tue, 23 Mar 2010 08:27:30 +0100 Message-ID: <1269329250.3043.19.camel@edumazet-laptop> References: <4BA85EA2.1090304@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: QUOTED-PRINTABLE Cc: "David S. Miller" , Tom Herbert , netdev@vger.kernel.org To: xiaosuo@gmail.com Return-path: Received: from mail-vw0-f46.google.com ([209.85.212.46]:62612 "EHLO mail-vw0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751361Ab0CWH1i (ORCPT ); Tue, 23 Mar 2010 03:27:38 -0400 Received: by vws6 with SMTP id 6so716561vws.19 for ; Tue, 23 Mar 2010 00:27:36 -0700 (PDT) In-Reply-To: <4BA85EA2.1090304@gmail.com> Sender: netdev-owner@vger.kernel.org List-ID: Le mardi 23 mars 2010 =C3=A0 14:24 +0800, Changli Gao a =C3=A9crit : > make distributing packets fairly among all the online CPUs default. >=20 > Make distributing packets fairly among all the online CPUs default, t= hen > users don't need any explicit configuration to get the benefit of RPS= =2E >=20 Some people want to dedicate a cpu to network interrupts, cache hits only, to get low latencies. RPS is not a win for all workloads. I think we should not change default without a knob. Didnt we discussed all this during last months ?