From mboxrd@z Thu Jan 1 00:00:00 1970 From: Arjan van de Ven Subject: Re: [PATCH v6] net: batch skb dequeueing from softnet input_pkt_queue Date: Sun, 2 May 2010 07:13:24 -0700 Message-ID: <20100502071324.1a95fdad@infradead.org> References: <20100429182347.GA8512@gargoyle.fritz.box> <1272568347.2209.11.camel@edumazet-laptop> <20100429214144.GA10663@gargoyle.fritz.box> <20100430.163857.180417789.davem@davemloft.net> <20100501110000.GB9434@gargoyle.fritz.box> <1272783366.2173.13.camel@edumazet-laptop> <20100502092020.GA9655@gargoyle.fritz.box> <1272797690.2173.26.camel@edumazet-laptop> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Cc: Andi Kleen , David Miller , hadi@cyberus.ca, xiaosuo@gmail.com, therbert@google.com, shemminger@vyatta.com, netdev@vger.kernel.org, lenb@kernel.org To: Eric Dumazet Return-path: Received: from casper.infradead.org ([85.118.1.10]:45630 "EHLO casper.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756150Ab0EBOL0 (ORCPT ); Sun, 2 May 2010 10:11:26 -0400 In-Reply-To: <1272797690.2173.26.camel@edumazet-laptop> Sender: netdev-owner@vger.kernel.org List-ID: > > Cn Avg residency P-states (frequencies) > C0 (cpu running) (68.9%) 2.93 Ghz 46.5% > polling 0.0ms ( 0.0%) 2.80 Ghz 5.1% > C1 mwait 0.0ms ( 0.0%) 2.53 Ghz 3.0% > C2 mwait 0.0ms (31.1%) 2.13 Ghz 2.8% > 1.60 Ghz 38.2% I bet your system advertizes C2 with the same latency as C1, but with lower power... which means Linux will pretty much never pick C1.... no matter how much you take Andi's patch. this is a bios thing... and until we put in the patch to override the bios values (I can dust it off but it might need a bit of tweaking since it was against .31) Andi's patch alone won't cut it... you also need a non-lying bios ;) -- Arjan van de Ven Intel Open Source Technology Centre For development, discussion and tips for power savings, visit http://www.lesswatts.org