Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Wed, 20 Nov 2002 19:03:07 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Wed, 20 Nov 2002 19:03:07 -0500 Received: from mailhost.cotse.com ([216.112.42.58]:2314 "EHLO mailhost.cotse.com") by vger.kernel.org with ESMTP id ; Wed, 20 Nov 2002 19:03:03 -0500 Message-ID: Date: Wed, 20 Nov 2002 19:08:49 -0500 (EST) X-Abuse-To: abuse@cotse.com Subject: Strange recurring vm behavior ( I think) From: "Alan Willis" To: X-Priority: 3 Importance: Normal X-MSMail-Priority: Normal Reply-To: alan@cotse.com X-Mailer: www.cotse.net MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="----=_20021120190849_36361" Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 10083 Lines: 165 ------=_20021120190849_36361 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit I began a large compile (glibc 2.3.1 + nptl 0.5), on 2.5.48-mm1, and went about my normal tasks. After about 3-4 minutes of compilation, my system noticeably slowed down, mouse jerked around, generally unusably slow behavior, not as bad as before (didn't last as long), but still ususable. I remembered what you said about the scheduler possibly causing problems. When I regained control of my system, albeit it was still slow, after about 60-90 seconds of the 'unusably slow' state, I reniced the make process I had going from 0 to -19. System load at this time was about 10.00 and falling slightly. Shortly after (<20 seconds? A bit of guesswork here, my apologies) my system became slow again and I started a 'vmstat 1', the output of which is attached. I waited a while, switched to another console, and did a 'pkill -9 make', after which my system became just as fast as it was before I began compiling in the first place. Vmstat output, slabinfo and meminfo are attached. I have more memory than I had last I reported similar slowdown, had 256M, presently have 384M. I had huge page support built in last time, I don't have it compiled in now. I was running fewer tasks now than I was last I experienced this sort of slowdown (was using kde 3.0.3 at the time, switched back to enlightenment 0.16.5, running fewer console sessions as well). These are the only sysctl changes I make from the defaults of 2.5.48-mm1: net.ipv4.ip_forward = 0 net.ipv4.conf.default.rp_filter = 1 kernel.core_uses_pid = 1 vm.swappiness = 30 I don't expect that a compile would slow down my machine so dramatically. I'd built enlightenment earlier today, it is also a fairly large compile, and I didn't even notice it. -alan ------=_20021120190849_36361 Content-Type: application/octet-stream; name="slab.log" Content-Disposition: attachment; filename="slab.log" Content-Transfer-Encoding: base64 ------=_20021120190849_36361 Content-Type: application/octet-stream; name="mem.log" Content-Disposition: attachment; filename="mem.log" Content-Transfer-Encoding: base64 ------=_20021120190849_36361 Content-Type: application/octet-stream; name="vmstat1.log" Content-Disposition: attachment; filename="vmstat1.log" Content-Transfer-Encoding: base64 W3Jvb3RAYXJpZXMgcm9vdF0jIHZtc3RhdCAxCiAgIHByb2NzICAgICAgICAgICAgICAgICAgICAg IG1lbW9yeSAgICAgIHN3YXAgICAgICAgICAgaW8gICAgIHN5c3RlbSAgICAgIGNwdQogciAgYiAg dyAgIHN3cGQgICBmcmVlICAgYnVmZiAgY2FjaGUgICBzaSAgIHNvICAgIGJpICAgIGJvICAgaW4g ICAgY3MgdXMgc3kgaWQKIDEgIDAgIDEgICAgIDIwICAyMzY4NCAgMzc2OTIgMjMzODg0ICAgIDAg 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application/octet-stream; name="dmesg.log" Content-Disposition: attachment; filename="dmesg.log" Content-Transfer-Encoding: base64 ------=_20021120190849_36361-- - 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/