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 10:54:18 -0700 Message-ID: <20100502105418.7abf83a7@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> <20100502071324.1a95fdad@infradead.org> <1272810448.2173.31.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]:38756 "EHLO casper.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758353Ab0EBRwJ (ORCPT ); Sun, 2 May 2010 13:52:09 -0400 In-Reply-To: <1272810448.2173.31.camel@edumazet-laptop> Sender: netdev-owner@vger.kernel.org List-ID: On Sun, 02 May 2010 16:27:28 +0200 Eric Dumazet wrote: > C2 latency seems to be 64 (us ?), while C1 seems to be 1 the processor_idle module has a "latency_factor" module parameter. The default is 2, but sometimes people think 6 is a better value... .. any chance you can try that value ? Also, I'm starting to wonder if Andi's patch to use io_schedule() needs to be replaced with a net_schedule() kind of thing. The cpuidle code currently has a weight factor for IO (based on measuring/experiments), and maybe networking really needs another factor... so just having a parallel concept with a different weight could be the right answer for that. > > Your CPU supports the following C-states : C1 C2 C3 > Your BIOS reports the following C-states : C1 C2 > > C3 seems to be disabled in BIOS btw this C2 == marketing name C3, and C3 == marketing name C6 (too many translations ;-) we'll fix powertop to report the marketing name soon. -- Arjan van de Ven Intel Open Source Technology Centre For development, discussion and tips for power savings, visit http://www.lesswatts.org