Messages in this thread | | | Subject | Re: 2.5.65-mm2 | From | Steven Cole <> | Date | 19 Mar 2003 12:51:28 -0700 |
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On Wed, 2003-03-19 at 02:21, Andrew Morton wrote: > > http://www.zip.com.au/~akpm/linux/patches/2.5/2.5.65/2.5.65-mm2/ >
I am seeing a significant degradation of interactivity under load with recent -mm kernels. The load is dbench on a reiserfs file system with increasing numbers of clients. The test machine is single PIII, IDE, 256MB memory, all kernels PREEMPT.
Specifying elevator=deadline improved the response of 2.5.65-mm2 somewhat, but it still eventually became intolerably slow with sufficient load.
Interactivity tests consisted of switching between desktops with two instances of Mozilla 1.3 on separate desktops, and Evolution 1.2.2 on another desktop. Additional tests included shaking the window and wiggling the scrollbar.
The third and fourth columns list the number of dbench clients at which interactivity becomes poor, or intolerable, defined here as getting a response after:
good less than 1 second poor seconds intolerable tens of seconds
kernel interactivity under load (dbench clients) good poor intolerable
2.5.65-bk 56* 2.5.65-mm1 <8 16 24 2.5.65-mm2 <8 16 24 2.5.65-mm2 deadline <8 20 28
*2.5.65-bk was still performing very well at dbench 56. I'll continue to test up to 128 clients.
2.5.65-bk was updated with a bk pull this morning.
Steven
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