Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Sat, 28 Apr 2001 09:23:07 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Sat, 28 Apr 2001 09:22:47 -0400 Received: from chiara.elte.hu ([157.181.150.200]:47631 "HELO chiara.elte.hu") by vger.kernel.org with SMTP id ; Sat, 28 Apr 2001 09:22:40 -0400 Date: Sat, 28 Apr 2001 15:21:05 +0200 (CEST) From: Ingo Molnar Reply-To: To: Ville Herva Cc: Fabio Riccardi , Subject: Re: X15 alpha release: as fast as TUX but in user space In-Reply-To: <20010428161502.I3529@niksula.cs.hut.fi> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Sat, 28 Apr 2001, Ville Herva wrote: > Uhh, perhaps I'm stupid, but why not cache the date field and update > the field once a five seconds? Or even once a second? yes, that should work. but that means possibly updating thousands of (or more) cached headers, which has some overhead ... > I mean, at the rate of thousands of requests per second that should > give you some advantage over dynamically generating it -- especially > if that's the only thing hindering copletely sendfile()'ing the > answer. well, the method i suggested was to use sendfile() twice: first the (cached, or freshly constructed) headers put into a big file, then the body itself (which is the original file, accessed via cached file descriptors). (splitting up the header and the body has the benefit of not dual-caching the same webcontent. this is what TUX does too.) Ingo - 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/