From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262107AbULCJNv (ORCPT ); Fri, 3 Dec 2004 04:13:51 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262106AbULCJNv (ORCPT ); Fri, 3 Dec 2004 04:13:51 -0500 Received: from mail.gmx.de ([213.165.64.20]:11159 "HELO mail.gmx.net") by vger.kernel.org with SMTP id S262121AbULCJMf (ORCPT ); Fri, 3 Dec 2004 04:12:35 -0500 X-Authenticated: #4512188 Message-ID: <41B02DFD.9090503@gmx.de> Date: Fri, 03 Dec 2004 10:12:29 +0100 From: "Prakash K. Cheemplavam" User-Agent: Mozilla Thunderbird 0.9 (X11/20041114) X-Accept-Language: de-DE, de, en-us, en MIME-Version: 1.0 To: Jens Axboe CC: akpm@osdl.org, linux-kernel@vger.kernel.org, nickpiggin@yahoo.com.au Subject: Re: Time sliced CFQ io scheduler References: <20041202130457.GC10458@suse.de> <20041202134801.GE10458@suse.de> <20041202114836.6b2e8d3f.akpm@osdl.org> <20041202195232.GA26695@suse.de> <20041202121938.12a9e5e0.akpm@osdl.org> <41AF94B8.8030202@gmx.de> <20041203070108.GA10492@suse.de> In-Reply-To: <20041203070108.GA10492@suse.de> 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="------------enigD85C1315DE481AF91C661D9B" 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) --------------enigD85C1315DE481AF91C661D9B Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Jens Axboe schrieb: > On Thu, Dec 02 2004, Prakash K. Cheemplavam wrote: > >> 0 3 3080 2208 1156 817712 0 0 3592 75624 1326 2289 1 36 0 >> 63 >> 0 3 3080 2664 1156 818240 0 0 5124 15692 1302 992 1 18 0 >> 81 >> 0 3 3080 2580 1160 815832 0 0 4356 155792 1375 1064 1 39 >> 0 60 >> 0 3 3080 2472 1160 817124 0 0 3076 100852 1345 1138 1 23 >> 0 76 >> 2 4 3080 2836 1148 816228 0 0 3336 100412 1352 1379 1 47 >> 0 52 >> 0 4 3080 2708 1144 815964 0 0 3844 48908 1343 871 1 25 0 >> 74 >> 0 3 3080 2748 1152 815984 0 0 3332 71996 1338 843 1 27 0 >> 72 > > > Can you try with the patch that is in the parent of this thread? The > above doesn't look that bad, although read performance could be better > of course. But try with the patch please, I'm sure it should help you > quite a lot. > It actually got worse: Though the read rate seems accepteble, it is not, as interactivity is dead while writing. I cannot start porgrammes, other programmes which want to do i/o pretty much hang. This is only while writing. While reading there is no such problem. Prakash 5 2692 5440 1640 917964 0 0 2332 72364 1337 782 1 28 0 71 0 5 2692 5536 1540 917116 0 0 2116 85360 1346 785 2 27 0 71 1 4 2692 7016 1496 919488 0 0 2152 71664 1329 740 3 29 0 68 0 4 2692 5112 1476 922536 0 0 872 110592 1328 798 0 17 0 83 0 4 2692 5560 1492 922144 0 0 1316 57348 1323 2162 1 21 0 78 0 4 2692 5240 1500 921808 0 0 2088 92200 1352 1285 1 26 0 73 0 4 2692 5816 1576 922064 0 0 1352 60716 1316 737 1 5 0 94 0 5 2692 5484 1588 920004 0 0 2072 87732 1327 3522 2 50 0 48 0 4 2692 5696 1660 920628 0 0 956 97284 1336 676 1 28 0 71 0 4 2692 5368 1592 921808 0 0 1296 23208 1367 4870 2 35 0 63 0 4 2692 5176 1628 922708 0 0 1576 67932 1400 721 0 4 0 96 1 4 2692 5496 1684 922604 0 0 2372 53216 1320 684 1 6 0 93 procs -----------memory---------- ---swap-- -----io---- --system-- ----cpu---- r b swpd free buff cache si so bi bo in cs us sy id wa 1 4 2692 6432 1744 924664 0 0 3144 31484 1331 651 1 5 0 94 0 4 2692 5496 1724 922056 0 0 2336 117040 1306 7770 1 63 0 36 0 4 2692 5500 1724 921588 0 0 2576 28992 1314 1244 1 26 0 73 0 5 2692 5484 1728 919340 0 0 1168 128796 1334 77435 2 45 0 53 0 4 2692 5432 1756 920864 0 0 1488 100392 1325 1100 1 25 0 74 1 4 2692 5368 1772 921900 0 0 1312 52180 1312 2087 1 21 0 78 0 4 2692 5240 1716 922272 0 0 2076 56352 1305 939 1 13 0 86 0 4 2692 5496 1732 921592 0 0 2596 68576 1320 1170 1 18 0 81 0 4 2692 5368 1776 921364 0 0 1588 21904 1281 1201 1 23 0 76 0 4 2692 5516 1852 921840 0 0 6560 93864 1593 967 1 8 0 91 0 4 2692 5176 1816 922148 0 0 1068 73728 1581 4683 2 37 0 61 0 4 2692 5484 1756 922408 0 0 2096 73632 1450 1456 2 20 0 78 --------------enigD85C1315DE481AF91C661D9B 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) iD8DBQFBsC4AxU2n/+9+t5gRAsdAAJ9fxl8zr3ygAG9zSelQfwaS3kOtYwCg8xYC YuycgOBAw4Tl/1naBLvK1+A= =m3Ih -----END PGP SIGNATURE----- --------------enigD85C1315DE481AF91C661D9B--