Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S269337AbUIYOLw (ORCPT ); Sat, 25 Sep 2004 10:11:52 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S269340AbUIYOLw (ORCPT ); Sat, 25 Sep 2004 10:11:52 -0400 Received: from 1-1-4-20a.ras.sth.bostream.se ([82.182.72.90]:55996 "EHLO garbo.kenjo.org") by vger.kernel.org with ESMTP id S269337AbUIYOLu (ORCPT ); Sat, 25 Sep 2004 10:11:50 -0400 Subject: Re: Sluggishness in 2.6.7 caused by IDE stack From: Kenneth Johansson To: Scott A Crosby Cc: linux-kernel@vger.kernel.org In-Reply-To: References: Content-Type: text/plain Date: Sat, 25 Sep 2004 16:11:25 +0200 Message-Id: <1096121485.2760.5.camel@tiger> Mime-Version: 1.0 X-Mailer: Evolution 2.0.0 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1542 Lines: 36 On Sat, 2004-09-25 at 07:26 -0500, Scott A Crosby wrote: > Much of the CPU time was spent in system mode. I setup a quick > oprofile, which blamed the function task_no_data_intr, but an > opannotate reports confusing results, possibly from interrupts? dmesg > reported nothing interesting. > > > Scott > > > *** vmstat output *** > > procs -----------memory---------- ---swap-- -----io---- --system-- ----cpu---- > 1 1 410496 8520 14224 1253716 0 0 2180 16 409 633 10 43 0 48 > 7 1 410496 6920 14236 1255380 0 0 1668 20 589 832 9 18 0 73 > 3 0 410496 8264 14232 1253988 0 0 2436 80 334 438 18 82 0 0 > 0 1 410496 8384 14244 1253860 0 0 1932 0 464 706 13 35 0 52 > 5 1 410496 8056 14264 1253872 328 0 2280 0 717 965 14 20 0 65 > 8 1 410496 7352 14268 1254640 0 0 2692 0 351 485 17 83 0 0 > 2 2 410496 6968 14264 1255036 32 0 2336 0 332 522 17 83 0 0 > 5 0 410496 8568 14276 1253384 0 0 2192 12 464 794 19 33 0 48 I think you have the same problem as me. The interrupt rate drops under 1000 during use of the DVD and that is strange as the HZ is 1000 and that should be the lowest possible value unless I misunderstood something. - 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/