Jari Kirma <j...@kirma.fi> writes: Hi,
> I recently installed Debian Squeeze on a new TS-419P+, and it ran > nicely. So, to make it more interesting, I upgraded to Wheeze, and now > I'm seeing a performance/responsiveness regression whose cause I can't > quite figure out. > > This has following symptoms: > > - Big-file dd with large block size (over 16 kiB or so, but especially > like 1 MiB), from both RAID-5 backed files and bare disks performs > much slower (30-60%!) than before. > - dd with small blocks (4 kiB would seem to be close to sweet spot) > performs roughly as expected, but slightly slower when served from > RAID-5 (maybe 25% difference at most). > - SSH and even serial console interaction on other shells feels much > choppier than it used to be according to my memory with Squeeze while > I was doing these benchmarks. > - System is fine without this disk activity (I didn't try if network > activity would have a similar effect, but just busylooping processes > cause no trouble). > > Do you have a chance to try this on Kirkwood system, preferably with > Marvell 6282, not 6281? Somehow I'm feeling that iirc, 6282 and 6281 are very similar beasts so it should not matter a lot if one is using 6281 or 6282 > linux-image-3.0.0-1-kirkwood kernel is missing interrupts, or > something. There is no indication of this on dmesg, though. There has not been a lot of changes on kirkwood specific parts so your issue may not be kirkwood specific. If it's possible, would be interesting to test 3.1-rc7 from experimental on your ts419p+. It's just finished to build so it should be available soon. Arnaud -- To UNSUBSCRIBE, email to debian-arm-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/87d3ejmv62....@lebrac.rtp-net.org
