Messages in this thread | | | Date | Thu, 25 Oct 2001 00:55:15 +0200 | From | "Marinos J. Yannikos" <> | Subject | Re: gdth / SCSI read performance issues (2.2.19 and 2.4.10) |
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Andrew Morton wrote:
> [...] you can't read files through the filesystem > at greater than 17? Which filesystem?
ext2 (on which I did a "tune2fs -j", but then I found out that the kernel apparently doesn't support ext3). But, see below.
> [...] It'd be interesting to test it on the same machine with
> the vendor's drivers and win2k.
Indeed - can't do so, unfortunately. It could also be an issue with the RAID-5 configuration (block size and arrangement of the disks in the array could be less than optimal as suggested by the ICP BIOS), so I'm in touch with the very helpful ICP support people as well.
> dd if=large_file of=/dev/null bs=4096k
OK, that's quite odd - now I get a reasonable ~55 MB/s whatever I try (dd, cp), so that must have been my mistake (or due to the kernel profiling option?).
By the way, I'm having lock-ups with 2.4.13 that I can reproduce (vi <file on reiserfs partition> ... :q ... "Segmentation fault" ... lock-up - console input still works, but apparently processes don't get scheduled).
Regards, Marinos
-- Marinos Yannikos, CEO Preisvergleich Internet Services AG Franzensbrückenstraße 8/2/16, A-1020 Wien Tel./Fax: (+431) 5811609-52/-55
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