Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751012AbXB0NRF (ORCPT ); Tue, 27 Feb 2007 08:17:05 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751538AbXB0NRF (ORCPT ); Tue, 27 Feb 2007 08:17:05 -0500 Received: from relay.2ka.mipt.ru ([194.85.82.65]:41098 "EHLO 2ka.mipt.ru" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751012AbXB0NRE (ORCPT ); Tue, 27 Feb 2007 08:17:04 -0500 Date: Tue, 27 Feb 2007 16:14:29 +0300 From: Evgeniy Polyakov To: Ingo Molnar Cc: Theodore Tso , Linus Torvalds , Ulrich Drepper , linux-kernel@vger.kernel.org, Arjan van de Ven , Christoph Hellwig , Andrew Morton , Alan Cox , Zach Brown , "David S. Miller" , Suparna Bhattacharya , Davide Libenzi , Jens Axboe , Thomas Gleixner Subject: Re: [patch 00/13] Syslets, "Threadlets", generic AIO support, v3 Message-ID: <20070227131427.GA29798@2ka.mipt.ru> References: <45DCD9E5.2010106@redhat.com> <20070222074044.GA4158@elte.hu> <20070222113148.GA3781@2ka.mipt.ru> <20070226172812.GC22454@2ka.mipt.ru> <20070226195416.GA11188@elte.hu> <20070227102832.GC23170@2ka.mipt.ru> <20070227115221.GJ8154@thunk.org> <20070227123421.GA21616@elte.hu> Mime-Version: 1.0 Content-Type: text/plain; charset=koi8-r Content-Disposition: inline In-Reply-To: <20070227123421.GA21616@elte.hu> User-Agent: Mutt/1.5.9i X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-3.0 (2ka.mipt.ru [0.0.0.0]); Tue, 27 Feb 2007 16:16:11 +0300 (MSK) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1007 Lines: 22 On Tue, Feb 27, 2007 at 01:34:21PM +0100, Ingo Molnar (mingo@elte.hu) wrote: > based servers. The measurements so far have shown that the absolute > worst-case threading server performance is at around 60% of that of > non-context-switching servers - and even that level is reached > gradually, leaving time for action for the server owner. While with > fully event based servers there are mostly only two modes of > performance: 100% performance and near-0% performance: total breakdown. Let's live in piece! :) I always agreed that they should be used together - event-based rings of IO requests, if request happens to block (which should be avaided as much as possible), then it continues on behalf of sleeping thread. > Ingo -- Evgeniy Polyakov - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/