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Re: ext3 performance mystery



   Date: Wed, 11 Sep 2002 00:02:29 +0100
   From: "Stephen C. Tweedie" <sct redhat com>

   Hi,

   On Tue, Sep 10, 2002 at 03:06:57PM -0500, Max Hailperin wrote:

   > Under ext3, I get a totally different, and very mysterious, behavior.
   > Sometimes the I/O bound process will make very low rates of progress
   > for tens of seconds. 

   Which kernel is this with?

   --Stephen

Whoops, I should have included that.  My apologies for an
uncharacteristically incomplete bug report.  Here is my /proc/version:

Linux version 2.4.18-3 (bhcompile daffy perf redhat com) (gcc version 2.96 20000731 (Red Hat Linux 7.3 2.96-110)) #1 Thu Apr 18 07:37:53 EDT 2002

This happens to be on a uniprocessor Pentium II, but I have replicated
similar results on other uniprocessor x86 machines.

Thanks for any light you can shed.  -max





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