Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Thu, 28 Feb 2002 04:27:46 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Thu, 28 Feb 2002 04:25:42 -0500 Received: from unicef.org.yu ([194.247.200.148]:59915 "EHLO unicef.org.yu") by vger.kernel.org with ESMTP id ; Thu, 28 Feb 2002 04:24:19 -0500 Date: Thu, 28 Feb 2002 10:20:15 +0100 (CET) From: Davidovac Zoran To: Alan Cox cc: lonely wolf , Mark Hahn , Subject: Re: disk transfer speed problem In-Reply-To: Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 27 Feb 2002, Alan Cox wrote: > Date: Wed, 27 Feb 2002 23:46:42 +0000 (GMT) > From: Alan Cox > To: lonely wolf > Cc: Mark Hahn , linux-kernel@vger.kernel.org > > > > > Timing buffered disk reads: 64 MB in 3.24 seconds = 19.75 MB/sec > > > > > > well, 109 MB/s is pretty low for buffer-cache reads; this reflects > > > the relative crippled-ness of your cpu/dram/chipset. > > > > well... i would't name a Celeron 900 MHz crippled. PC133 is the best the > > board gets... and now the speed is lower then the previous server which was > > an Athlon 600 pluggede in an Asus VIA KX133 based mobo. > > I get 25MB/sec off my i815 board. It is pretty starved - I seem stuck at > about 25MB/sec total even doing hdparm across both controllers. > > Using an external video card might make a small difference > - on kernel 2.2.20 with andre ata100 patches ported from 2.2.19 to 2.2.20 on asus i815 board. Kernel 2.4.17 results are similar about 35MB/sec I got this results, machine is under small workload. root@MEGANET:~# hdparm -tT /dev/hda /dev/hda: Timing buffer-cache reads: 128 MB in 0.96 seconds =133.33 MB/sec Timing buffered disk reads: 64 MB in 1.73 seconds = 36.99 MB/sec root@MEGANET:~# hdparm -i /dev/hda /dev/hda: Model=MAXTOR 6L040J2, FwRev=A93.0500, SerialNo=662131534628 Config={ HardSect NotMFM HdSw>15uSec Fixed DTR>10Mbs } RawCHS=16383/16/63, TrkSize=32256, SectSize=21298, ECCbytes=4 BuffType=DualPortCache, BuffSize=1819kB, MaxMultSect=16, MultSect=off CurCHS=16383/16/63, CurSects=-66060037, LBA=yes, LBAsects=78177792 IORDY=on/off, tPIO={min:120,w/IORDY:120}, tDMA={min:120,rec:120} PIO modes: pio0 pio1 pio2 pio3 pio4 DMA modes: mdma0 mdma1 mdma2 udma0 udma1 udma2 udma3 udma4 *udma5 udma6 AdvancedPM=no Drive Supports : ATA/ATAPI-5 T13 1321D revision 1 : ATA-1 ATA-2 ATA-3 ATA-4 ATA-5 root@MEGANET:~# hdparm -v /dev/hda /dev/hda: multcount = 0 (off) I/O support = 0 (default 16-bit) unmaskirq = 0 (off) using_dma = 1 (on) keepsettings = 0 (off) nowerr = 0 (off) readonly = 0 (off) readahead = 8 (on) geometry = 4866/255/63, sectors = 78177792, start = 0 other details: Intel machine check reporting enabled on CPU#0. 128K L2 cache (4 way) CPU: L2 Cache: 128K CPU: Intel Pentium III (Coppermine) stepping 0a Checking 386/387 coupling... OK, FPU using exception 16 error reporting. Checking 'hlt' instruction... OK. POSIX conformance testing by UNIFIX mtrr: v1.35a (19990819) Richard Gooch (rgooch@atnf.csiro.au) PCI: PCI BIOS revision 2.10 entry at 0xf0e30 PCI: Using configuration type 1 PCI: Probing PCI hardware Linux agpgart interface v0.99 (c) Jeff Hartmann agpgart: Maximum main memory to use for agp memory: 203M agpgart: Detected Intel i815 chipset agpgart: AGP aperture is 32M @ 0xfc000000 Zoran - 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/