Messages in this thread | | | From | "Gordon Larsen" <> | Subject | RE: IDE performance drop between 2.4.23 and 2.6.0 | Date | Wed, 24 Dec 2003 10:24:31 -0700 |
| |
Me too...using a Promise Fastrack 133 TX2 card and a three 80GB Barracuda drives in a md RAID5 array, throughput dropped from about 40MB/S on the array to about 30-33MB/S. Readahead buffer setting make little or no difference.
...Gord
>-----Original Message----- >From: linux-kernel-owner@vger.kernel.org >[mailto:linux-kernel-owner@vger.kernel.org]On Behalf Of Gene Heskett >Sent: December 24, 2003 8:17 AM >To: Vid Strpic; Jean-Luc Fontaine >Cc: linux-kernel@vger.kernel.org >Subject: Re: IDE performance drop between 2.4.23 and 2.6.0 > > >On Wednesday 24 December 2003 04:27, Vid Strpic wrote: >>On Tue, Dec 23, 2003 at 01:42:22PM +0100, Jean-Luc Fontaine wrote: >>> on 2.4: >>> Timing buffer-cache reads: 168 MB in 2.01 seconds = 83.58 >>> MB/sec Timing buffered disk reads: 44 MB in 3.12 seconds = >>> 14.10 MB/sec on 2.6: >>> Timing buffer-cache reads: 172 MB in 2.02 seconds = 84.95 >>> MB/sec Timing buffered disk reads: 34 MB in 3.08 seconds = >>> 11.04 MB/sec >>> >>> Note the big drop of of 3 MB/sec on disk reads. >> >>Consider yourself lucky :o) >> >>I had a drop from 55Mb/s to around 35, 2.4.22->2.6.0-test&final. >>Promise 20265, Seagate Barracuda 7.7200 80Gb, so nice ;) > >I think the question should be, what are you fellows doing wrong? >From onboard 2 year old via chipset, athlon at 1450mhz real: > >[root@coyote root]# hdparm -tT /dev/hda > >/dev/hda: > Timing buffer-cache reads: 128 MB in 0.69 seconds =185.80 MB/sec > Timing buffered disk reads: 64 MB in 1.15 seconds = 55.42 MB/sec >[root@coyote root]# hdparm -tT /dev/hdb > >/dev/hdb: > Timing buffer-cache reads: 128 MB in 0.69 seconds =185.00 MB/sec > Timing buffered disk reads: 64 MB in 2.07 seconds = 30.89 MB/sec >[root@coyote root]# hdparm -tT /dev/hdd > >/dev/hdd: > Timing buffer-cache reads: 128 MB in 0.71 seconds =181.07 MB/sec > Timing buffered disk reads: 64 MB in 1.40 seconds = 45.62 MB/sec > >-- >Cheers, Gene >AMD K6-III@500mhz 320M >Athlon1600XP@1400mhz 512M >99.22% setiathome rank, not too shabby for a WV hillbilly >Yahoo.com attornies please note, additions to this message >by Gene Heskett are: >Copyright 2003 by Maurice Eugene Heskett, all rights reserved. > >- >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/ > >
- 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/
| |