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Bill Roberts wrote: |
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The one thing that first pops to my head is some hdparm results I've had |
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and if maybe it's either my kernel setup or how I'm testing with hdparm... |
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Anyhow.. |
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Raptors on SATA (Model Number: WDC WD360GD-00FNA0) (-c3 -u1 -A1 |
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-W1 -d1 -a256 -M254 -m16 -X70 ) |
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Kernel config |
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CONFIG_SCSI_SATA_SIL=y |
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There's an alternative driver, but haven't tested it... |
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hdparm -tT /dev/hde |
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/dev/hde: |
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Timing cached reads: 956 MB in 2.00 seconds = 477.02 MB/sec |
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Timing buffered disk reads: 116 MB in 3.03 seconds = 38.26 MB/sec |
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Your times for the raptor seem awfully slow. |
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Here the SATA settings for my kernel and my hdparm times. |
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antec ~ # grep SATA /usr/src/linux/.config |
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# CONFIG_BLK_DEV_IDE_SATA is not set |
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CONFIG_SCSI_SATA=y |
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CONFIG_SCSI_SATA_AHCI=y |
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# CONFIG_SCSI_SATA_SVW is not set |
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# CONFIG_SCSI_SATA_MV is not set |
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# CONFIG_SCSI_SATA_NV is not set |
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# CONFIG_SCSI_SATA_QSTOR is not set |
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# CONFIG_SCSI_SATA_PROMISE is not set |
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# CONFIG_SCSI_SATA_SX4 is not set |
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# CONFIG_SCSI_SATA_SIL is not set |
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# CONFIG_SCSI_SATA_SIL24 is not set |
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# CONFIG_SCSI_SATA_SIS is not set |
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# CONFIG_SCSI_SATA_ULI is not set |
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# CONFIG_SCSI_SATA_VIA is not set |
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# CONFIG_SCSI_SATA_VITESSE is not set |
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CONFIG_SCSI_SATA_INTEL_COMBINED=y |
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antec ~ # hdparm -tT /dev/md0 |
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/dev/md0: |
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Timing cached reads: 2776 MB in 2.00 seconds = 1387.91 MB/sec |
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Timing buffered disk reads: 398 MB in 3.00 seconds = 132.48 MB/sec |
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antec ~ # |
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Note that this is a RAID0 with two disks, so the buffered disk read time |
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is double what you should expect on a normal install. |
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I guess I should add that 2nd disk in there then.. Anyhow, I'm bound |
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to what appears to be a not-so-friendly controller..
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CONFIG_SCSI_SATA_SIL is not set |
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I'm going to change the sata_sil.c file to enable UDMA6 and I've seen |
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some other minor patches as well.. If it all proves stable.. Maybe |
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someone will actually get it sent upstream. What's further.. I'm on |
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hardened.. So I think you might have some kernel config options I don't |
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have.. I have to look again..
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Cheers,
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C.
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-- |
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gentoo-performance@g.o mailing list |
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