Gentoo Archives: gentoo-performance

From: Bill Roberts <billbalt@×××××××××××××.com>
To: gentoo-performance@l.g.o
Subject: Re: [gentoo-performance] gentoo-performance
Date: Fri, 20 Jan 2006 13:55:29
Message-Id: 20060120135137.GA4610@antec.eyeofthequark.com
In Reply to: Re: [gentoo-performance] gentoo-performance by "Christopher Bergström"
> > The one thing that first pops to my head is some hdparm results I've had > and if maybe it's either my kernel setup or how I'm testing with hdparm... > > Anyhow.. > > Raptors on SATA (Model Number: WDC WD360GD-00FNA0) (-c3 -u1 -A1 > -W1 -d1 -a256 -M254 -m16 -X70 ) > Kernel config > CONFIG_SCSI_SATA_SIL=y > > There's an alternative driver, but haven't tested it... > > hdparm -tT /dev/hde > > /dev/hde: > Timing cached reads: 956 MB in 2.00 seconds = 477.02 MB/sec > Timing buffered disk reads: 116 MB in 3.03 seconds = 38.26 MB/sec >
Your times for the raptor seem awfully slow. Here the SATA settings for my kernel and my hdparm times. antec ~ # grep SATA /usr/src/linux/.config # CONFIG_BLK_DEV_IDE_SATA is not set CONFIG_SCSI_SATA=y CONFIG_SCSI_SATA_AHCI=y # CONFIG_SCSI_SATA_SVW is not set # CONFIG_SCSI_SATA_MV is not set # CONFIG_SCSI_SATA_NV is not set # CONFIG_SCSI_SATA_QSTOR is not set # CONFIG_SCSI_SATA_PROMISE is not set # CONFIG_SCSI_SATA_SX4 is not set # CONFIG_SCSI_SATA_SIL is not set # CONFIG_SCSI_SATA_SIL24 is not set # CONFIG_SCSI_SATA_SIS is not set # CONFIG_SCSI_SATA_ULI is not set # CONFIG_SCSI_SATA_VIA is not set # CONFIG_SCSI_SATA_VITESSE is not set CONFIG_SCSI_SATA_INTEL_COMBINED=y antec ~ # hdparm -tT /dev/md0 /dev/md0: Timing cached reads: 2776 MB in 2.00 seconds = 1387.91 MB/sec Timing buffered disk reads: 398 MB in 3.00 seconds = 132.48 MB/sec antec ~ # Note that this is a RAID0 with two disks, so the buffered disk read time is double what you should expect on a normal install. Good luck. Bill Roberts

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Subject Author
Re: [gentoo-performance] gentoo-performance "Christopher Bergström" <cbergstrom@×××××××××.com>