From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262184AbUKKHne (ORCPT ); Thu, 11 Nov 2004 02:43:34 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262185AbUKKHne (ORCPT ); Thu, 11 Nov 2004 02:43:34 -0500 Received: from imap.gmx.net ([213.165.64.20]:52362 "HELO mail.gmx.net") by vger.kernel.org with SMTP id S262184AbUKKHnV (ORCPT ); Thu, 11 Nov 2004 02:43:21 -0500 X-Authenticated: #4512188 Message-ID: <41931811.2090303@gmx.de> Date: Thu, 11 Nov 2004 08:43:13 +0100 From: "Prakash K. Cheemplavam" User-Agent: Mozilla Thunderbird 0.9 (X11/20041109) X-Accept-Language: en-us, en MIME-Version: 1.0 To: Nick Piggin CC: Bill Davidsen , linux-kernel@vger.kernel.org Subject: Re: [2.6.10-rc1 and prev] System unuseable while writing to disk References: <418FE968.4030300@gmx.de> <41927019.9050508@tmr.com> <41930F9C.8010308@gmx.de> <419315D7.9070308@yahoo.com.au> In-Reply-To: <419315D7.9070308@yahoo.com.au> X-Enigmail-Version: 0.89.0.0 X-Enigmail-Supports: pgp-inline, pgp-mime Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="------------enig45117B3CF37BFAED1C2FF996" Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enig45117B3CF37BFAED1C2FF996 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Nick Piggin wrote: > Prakash K. Cheemplavam wrote: > >> 100 0 >> 0 0 0 774876 14532 136460 0 0 0 0 1180 436 1 >> 0 99 0 >> 1 1 0 571740 14732 333736 0 0 32 42628 1325 633 3 >> 43 52 2 >> 2 2 0 217812 15072 676648 0 0 0 45184 1523 1771 14 >> 78 0 8 >> 1 2 0 220436 15072 676648 0 0 0 49664 1582 1365 9 >> 6 0 85 >> 0 2 0 85460 15984 808012 0 0 164 73984 1487 1143 18 >> 32 0 49 >> 0 1 0 85716 15984 808140 0 0 0 29056 1493 1381 4 >> 6 0 90 >> 0 1 0 86100 15984 808140 0 0 0 40320 1420 1367 3 >> 2 0 95 >> 0 1 0 86100 15984 808140 0 0 0 44416 1386 693 0 >> 2 0 98 >> 0 1 0 86100 15984 808140 0 0 0 50304 1518 1413 5 >> 6 0 89 >> 0 1 0 86164 15984 808140 0 0 0 28544 1452 827 1 >> 2 0 97 >> 0 1 0 86292 15984 808140 0 0 0 35840 1386 809 1 >> 2 0 97 >> 0 1 0 86356 15984 808140 0 0 0 37376 1450 1373 3 >> 3 0 94 >> procs -----------memory---------- ---swap-- -----io---- --system-- >> ----cpu---- >> r b swpd free buff cache si so bi bo in cs us >> sy id wa >> 1 1 0 86484 15984 808140 0 0 0 42880 1752 2494 7 >> 6 0 87 >> 0 1 0 86484 15984 808140 0 0 0 31872 1608 2098 7 >> 4 0 89 >> 0 1 0 86484 15984 808140 0 0 0 45952 1530 795 1 >> 2 0 97 >> 0 1 0 86484 15984 808140 0 0 0 44288 1515 814 0 >> 3 0 97 >> 0 1 0 90580 15984 808140 0 0 0 29052 1471 1365 5 >> 5 0 90 >> 1 0 0 90148 16108 809356 0 0 976 2088 1383 1319 22 >> 11 0 67 >> 0 0 0 90148 16108 809360 0 0 4 16 1444 833 10 >> 5 84 1 >> 0 0 0 90148 16108 809360 0 0 0 0 1256 473 0 >> 0 100 0 >> 0 0 0 90148 16108 809360 0 0 0 0 1379 611 3 >> 1 96 0 >> 0 0 0 90148 16108 809360 0 0 0 0 1526 2439 16 >> 5 79 0 >> 0 0 0 90148 16164 809360 0 0 0 120 1563 1824 16 >> 4 80 0 >> >> >> Beginning and end the system is idle and then I start writing down the >> file. During that time thunderbird gets unusable. >> > > It looks like it may be a CPU scheduler issue: Nothing needs to > be read, no swap activity, enough free memory. I see this behaviour with default scheduler in vanilla and with staircase... > However, it also does look like there is a lot of CPU power free, > which makes the cpu scheduler less likely... Maybe interrupts are > using a lot of CPU time or latency, and that is being hidden from > CPU time accounting. > > I think Ingo did notice quite large latencies in disk interrupts, > although whether that would be enough to make thunderbird "unusable", > I'm not sure. I tried preempt (inkl preempt "big kernel lock" in ck) which doesn't avoid above. (I don't rember whether it was better, though.) bye, Prakash --------------enig45117B3CF37BFAED1C2FF996 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.6 (GNU/Linux) iD8DBQFBkxgRxU2n/+9+t5gRAgBLAJ9Np/yVdL+jiFXAayaD6mUSh1w5LwCgvota gnuL3FFS+l1qAKuBYOdh0zc= =a0FD -----END PGP SIGNATURE----- --------------enig45117B3CF37BFAED1C2FF996--