Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Wed, 3 Oct 2001 04:36:44 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Wed, 3 Oct 2001 04:36:35 -0400 Received: from chiara.elte.hu ([157.181.150.200]:12807 "HELO chiara.elte.hu") by vger.kernel.org with SMTP id ; Wed, 3 Oct 2001 04:36:23 -0400 Date: Wed, 3 Oct 2001 10:34:23 +0200 (CEST) From: Ingo Molnar Reply-To: To: jamal Cc: , Alexey Kuznetsov , Robert Olsson , Benjamin LaHaise , , Linus Torvalds , Alan Cox , Simon Kirby Subject: Re: [announce] [patch] limiting IRQ load, irq-rewrite-2.4.11-B5 In-Reply-To: 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 Tue, 2 Oct 2001, jamal wrote: > [...] please have the courtesy of at least posting results/numbers of > how this improved things and under what workloads and conditions. > [...] 500 MHz PIII UP server, 433 MHz client over a single 100 mbit ethernet using Simon Kirby's udpspam tool to overload the server. Result: 2.4.10 locks up before the patch. 2.4.10 with the first generation irqrate patch applied protects against the lockup (if max_rate is correct), but results in dropped packets. The auto-tuning+polling patch results in a working system and working network, no lockup and no dropped packets. Why this happened and how it happened has been discussed extensively. (the effect of polling-driven networking is just an extra and unintended bonus side-effect.) 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/