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 10:43:04 -0700 Message-ID: <20100502104304.6c6b2764@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> <20100502154649.GA18063@gargoyle.fritz.box> <1272818131.2173.127.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]:42444 "EHLO casper.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758076Ab0EBRlL (ORCPT ); Sun, 2 May 2010 13:41:11 -0400 In-Reply-To: <1272818131.2173.127.camel@edumazet-laptop> Sender: netdev-owner@vger.kernel.org List-ID: On Sun, 02 May 2010 18:35:31 +0200 Eric Dumazet wrote > > > You mean we can wakeup a thread with something else than an IPI ? > actually we can. mwait is not only "go idle", it is "go idle until someone writes to cacheline". where is set up with a "monitor" instruction. We don't need to send an ipi per se.. all we need is to write to the right cacheline that we're monitoring. -- Arjan van de Ven Intel Open Source Technology Centre For development, discussion and tips for power savings, visit http://www.lesswatts.org