Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S270767AbTHAONr (ORCPT ); Fri, 1 Aug 2003 10:13:47 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S270773AbTHAONb (ORCPT ); Fri, 1 Aug 2003 10:13:31 -0400 Received: from h24-86-78-151.ed.shawcable.net ([24.86.78.151]:37250 "HELO alpha.home") by vger.kernel.org with SMTP id S270767AbTHAONW (ORCPT ); Fri, 1 Aug 2003 10:13:22 -0400 From: "Gordon Larsen" To: Subject: Disk speed differences under 2.6.0 Date: Fri, 1 Aug 2003 07:54:26 -0600 Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.2416 (9.0.2911.0) In-reply-to: <0E3FA95632D6D047BA649F95DAB60E570185F3CF@EXA-ATLANTA.se.lsil.com> Importance: Normal X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 6196 Lines: 206 My apologies if this has already been discussed - but has anyone noticed disk I/O speed differences under 2.6.0 as compared to 2.4.20? My system has an ASUS A7V333 MB with 768M Ram, a 1300MHz Duron, three 40GB Maxtor drives running linux software raid. See the screen capture below: ----------------------------- 2.4.20-19.9 ----------------------------------------------- [root@alpha root]# uname -a Linux alpha 2.4.20-19.9 #1 Mon Jul 28 18:59:34 MDT 2003 i686 athlon i386 GNU/Linux [root@alpha root]# hdparm -t /dev/md0 /dev/md0: Timing buffered disk reads: 64 MB in 2.90 seconds = 22.07 MB/sec [root@alpha root]# hdparm -t /dev/md1 /dev/md1: Timing buffered disk reads: 64 MB in 1.66 seconds = 38.55 MB/sec [root@alpha root]# hdparm -t /dev/md2 /dev/md2: Timing buffered disk reads: 64 MB in 0.96 seconds = 66.67 MB/sec [root@alpha root]# hdparm -t /dev/md3 /dev/md3: Timing buffered disk reads: 64 MB in 1.74 seconds = 36.78 MB/sec [root@alpha root]# hdparm -t /dev/md4 /dev/md4: Timing buffered disk reads: 64 MB in 1.74 seconds = 36.78 MB/sec [root@alpha root]# hdparm -t /dev/md5 /dev/md5: Timing buffered disk reads: 64 MB in 1.68 seconds = 38.10 MB/sec [root@alpha root]# hdparm -t /dev/md6 /dev/md6: Timing buffered disk reads: 64 MB in 1.70 seconds = 37.65 MB/sec ----------------------------- 2.6.0-0.test.2.1.28 ----------------------------------------------- [root@alpha root]# uname -a Linux alpha 2.6.0-0.test2.1.28custom #1 Thu Jul 31 20:02:20 MDT 2003 i686 athlon i386 GNU/Linux [root@alpha root]# hdparm -t /dev/md0 /dev/md0: Timing buffered disk reads: 64 MB in 2.67 seconds = 24.00 MB/sec [root@alpha root]# hdparm -t /dev/md1 /dev/md1: Timing buffered disk reads: 64 MB in 1.92 seconds = 33.37 MB/sec [root@alpha root]# hdparm -t /dev/md2 /dev/md2: Timing buffered disk reads: 64 MB in 1.37 seconds = 46.79 MB/sec [root@alpha root]# hdparm -t /dev/md3 /dev/md3: Timing buffered disk reads: 64 MB in 2.23 seconds = 28.69 MB/sec [root@alpha root]# hdparm -t /dev/md4 /dev/md4: Timing buffered disk reads: 64 MB in 2.20 seconds = 29.07 MB/sec [root@alpha root]# hdparm -t /dev/md5 /dev/md5: Timing buffered disk reads: 64 MB in 2.03 seconds = 31.45 MB/sec [root@alpha root]# hdparm -t /dev/md6 /dev/md6: Timing buffered disk reads: 64 MB in 1.99 seconds = 32.23 MB/sec ----------------------------- Mounts ----------------------------------------------- [root@alpha root]# mount /dev/md0 on / type ext3 (rw) none on /proc type proc (rw) usbdevfs on /proc/bus/usb type usbdevfs (rw) /dev/md1 on /boot type ext3 (rw) none on /dev/pts type devpts (rw,gid=5,mode=620) /dev/md3 on /home type ext3 (rw) none on /dev/shm type tmpfs (rw) /dev/md6 on /tmp type ext3 (rw) /dev/md4 on /usr type ext3 (rw) /dev/md5 on /var type ext3 (rw) ----------------------------- MD Device dump ----------------------------------------------- [root@alpha root]# lsraid -R -p # md device [dev 9, 2] /dev/md2 queried online raiddev /dev/md2 raid-level 0 nr-raid-disks 2 nr-spare-disks 0 persistent-superblock 1 chunk-size 64 device /dev/hde1 raid-disk 0 device /dev/hdg2 raid-disk 1 # md device [dev 9, 1] /dev/md1 queried online raiddev /dev/md1 raid-level 1 nr-raid-disks 2 nr-spare-disks 0 persistent-superblock 1 chunk-size 64 device /dev/hde2 raid-disk 0 device /dev/hdg1 raid-disk 1 # md device [dev 9, 4] /dev/md4 queried online raiddev /dev/md4 raid-level 5 nr-raid-disks 3 nr-spare-disks 0 persistent-superblock 1 chunk-size 64 device /dev/hde3 raid-disk 0 device /dev/hdg3 raid-disk 1 device /dev/hdh3 raid-disk 2 # md device [dev 9, 3] /dev/md3 queried online raiddev /dev/md3 raid-level 5 nr-raid-disks 3 nr-spare-disks 0 persistent-superblock 1 chunk-size 64 device /dev/hde5 raid-disk 0 device /dev/hdg5 raid-disk 1 device /dev/hdh5 raid-disk 2 # md device [dev 9, 5] /dev/md5 queried online raiddev /dev/md5 raid-level 5 nr-raid-disks 3 nr-spare-disks 0 persistent-superblock 1 chunk-size 64 device /dev/hde6 raid-disk 0 device /dev/hdg6 raid-disk 1 device /dev/hdh6 raid-disk 2 # md device [dev 9, 0] /dev/md0 queried online raiddev /dev/md0 raid-level 1 nr-raid-disks 2 nr-spare-disks 0 persistent-superblock 1 chunk-size 64 device /dev/hde7 raid-disk 0 device /dev/hdg7 raid-disk 1 # md device [dev 9, 6] /dev/md6 queried online raiddev /dev/md6 raid-level 5 nr-raid-disks 3 nr-spare-disks 0 persistent-superblock 1 chunk-size 64 device /dev/hde8 raid-disk 0 device /dev/hdg8 raid-disk 1 device /dev/hdh8 raid-disk 2 [root@alpha root]# -------------------------------- end-of-capture ----------------------------------------------- Cheers...Gord - 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/