Messages in this thread | | | Date | Sat, 15 Nov 2003 19:12:47 +0100 | From | "Prakash K. Cheemplavam" <> | Subject | Re: 2.6.0-test9 /-mm3 SATA siimage - bad disk performance |
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Marcus Hartig wrote: > Prakash K. Cheemplavam wrote: > >> I have a similar problem: With 2.4.22-ac3 I had 37mb/sec with my >> Samsung HD and 49MB/sec with IBM/Hitachi, now with 2.6 (all I tried, >> including test9-mm2) I had only 20mb/sec for Samsung and about >> 39mb/sec for the IBM. Motherboard is Abit NF7-S Rev2.0, as well, so >> same situation with the siimage 1.06 driver. I wanted to run some dd >> tests as well, but it is a real performance hit. Playing with >> readahead or other hdparm options didn't help either. > > > I get a tip from Mark Hahn to set the pci latency to 64. And wow, with > fedora 2.4.22 kernel I get then 41MB/sec with max_k_p_r 128. But,... > after copying big files I get ext3-fs erros, cannot read inode etc and a > bus error. Bumm!
Is there a way to change the latency within Linux? I mean I don't want to ruin my Windows, as it works w/o problems. Nevertheless I rather make a backup of my Linux install before messing with that...
Prakash
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