From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760595AbXEUI3T (ORCPT ); Mon, 21 May 2007 04:29:19 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755689AbXEUI3E (ORCPT ); Mon, 21 May 2007 04:29:04 -0400 Received: from 74-93-104-97-Washington.hfc.comcastbusiness.net ([74.93.104.97]:41229 "EHLO sunset.davemloft.net" rhost-flags-OK-FAIL-OK-OK) by vger.kernel.org with ESMTP id S1755963AbXEUI3C (ORCPT ); Mon, 21 May 2007 04:29:02 -0400 Date: Mon, 21 May 2007 01:29:03 -0700 (PDT) Message-Id: <20070521.012903.18300561.davem@davemloft.net> To: mingo@elte.hu Cc: kernel@prachanda.info, linux-kernel@vger.kernel.org, torvalds@linux-foundation.org, akpm@linux-foundation.org, tglx@linutronix.de Subject: Re: bad networking related lag in v2.6.22-rc2 From: David Miller In-Reply-To: <20070521081201.GB13858@elte.hu> References: <20070521075824.GA11198@elte.hu> <20070521080351.GA13375@elte.hu> <20070521081201.GB13858@elte.hu> X-Mailer: Mew version 5.1.52 on Emacs 21.4 / Mule 5.0 (SAKAKI) Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org From: Ingo Molnar Date: Mon, 21 May 2007 10:12:01 +0200 > and ... you already did a trace for Thomas, for the softirq problem: > > http://cybertek.info/taitai/trace.txt.bz2 > > this trace shows really bad networking related kernel activities! > > gkrellm-5977 does this at timestamp 0: > > gkrellm-5977 0..s. 0us : cond_resched_softirq (established_get_next) So it's not the 3c59x bug :-) If you have a lot of sockets, there is not way to make the performance of dumping /proc/net/tcp not suck, use the netlink socket dumping which is: 1) more efficient even for full dumps 2) allows filtering for the best possible performance