[Bug 131094] Re: Heavy Disk I/O harms desktop responsiveness
Hendrik van den Boogaard
chasake at ision.nl
Tue Apr 21 20:48:26 UTC 2009
KhaaL: thanks for pointing to that thread, but there is so much
information there that I cannot really separate all the issues at hand.
The test suite does not give any satisfactory results which I could
interpret. For now my best test is just to copy big files from PATA to
SATA disk, however the XFS allocation strategy may scatter the files (or
parts of every file) on the disk which makes I/O performance a bit
different every time.
I've tried that using the Intrepid default kernel and the Jaunty default
kernel. It seems that the Jaunty kernel is a lot more sluggish. From the
PPA I downloaded 2.6.29 which seems to be no good either. Some people
have mentioned slow fsync behviour in 2.6.29 just as in 2.6.28 which is
the Jaunty default.
Currently I am running 2.6.30 from http://kernel.ubuntu.com/~kernel-
image-2.6.30-020630rc2-generic_2.6.30-020630rc2_amd64.deb in which I
don't really notice slow GUI behaviour. While copying the large files I
can still open a terminal and do stuff. I will reboot and try this again
running with a 'mem=512m' boot option to make sure there is not too much
Heavy Disk I/O harms desktop responsiveness
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