Messages in this thread | | | Subject | Re: poor sata performance on 2.6 | From | Justin Cormack <> | Date | Thu, 15 Apr 2004 15:00:32 +0100 |
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hmm, odd. I get 50MB/s or so from normal (7200, 8MB cache) WD disks, and Seagate from the same controller. Can you send lspci, /proc/interrupts and dmesg...
Justin
On Thu, 2004-04-15 at 14:34, Konstantin Sobolev wrote: > On Thursday 15 April 2004 16:02, Justin Cormack wrote: > > Ah I see from your config you have himem_4G turned on. How much memory > > do you have? Sii3112 appears (I dont actually have datasheets) to only > > have 32 bit DMA support, and will use bounce buffers quite a lot of the > > time if you turn on himem at all, reducing throughput substantially. Try > > again with no himem support at all and see if it helps. > > I have 1.5 GB. I tried to disable highmem, now less than 1GB is visible, but > there is no noticable difference in SATA performance: > > siimage: > /dev/hde: > setting fs readahead to 8129 > setting 32-bit IO_support flag to 1 > setting multcount to 16 > multcount = 16 (on) > IO_support = 1 (32-bit) > unmaskirq = 0 (off) > using_dma = 1 (on) > keepsettings = 0 (off) > readonly = 0 (off) > readahead = 8128 (on) > geometry = 16383/255/63, sectors = 145226112, start = 0 > Timing buffer-cache reads: 1428 MB in 2.00 seconds = 713.75 MB/sec > Timing buffered disk reads: 100 MB in 3.03 seconds = 32.99 MB/sec > > libata > /dev/sda: > setting fs readahead to 8192 > readahead = 8192 (on) > Timing buffered disk reads: 82 MB in 3.02 seconds = 27.17 MB/sec
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