Messages in this thread |  | | | Date | Sun, 20 Sep 2009 22:22:20 +0200 (CEST) | | From | Jiri Kosina <> | | Subject | Re: Poor desktop responsiveness with background I/O-operations |
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On Sun, 20 Sep 2009, Ulrich Lukas wrote:
> Test case: > - 64-bit dual-core PC, SATA harddrive, plenty of free RAM > - vanilla Linux 2.6.31, Kubuntu 9.10 packages, all software 64-bit > > > How to reproduce: > - start KDE/GNOME-session > - open a terminal window and do as a non-root user: > dd if=/dev/zero of=/home/john-doe/testfile > (or dd if=/home/john-doe/big-testfile of=/dev/null) > > - a real use scenario would be a daily disk-backup or the > simple extraction of a tarball containing slightly bigger files > > > Observation: > - The system becomes _really_ slow as described above; unusable for > any multimedia tasks.
I guess that switching from CFQ to deadline I/O scheduler improves the situation, right?
-- Jiri Kosina SUSE Labs, Novell Inc.
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