Strange pauses in 2.6.2-rc1 / AMD64
From: Aaron Mulder (ammulder_at_alumni.princeton.edu)
Date: 01/22/04
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Date: Wed, 21 Jan 2004 21:17:26 -0500 (EST) To: linux-kernel@vger.kernel.org
I tried out 2.6.2-rc1 today, and saw some very strange behavior
with Java. I run a 30s build process (Java/Ant), and it would basically
stop in the middle. If I run a "top" next to it (this was all in X),
during the pauses, the CPUs would go down to nearly 100% idle, and all the
Java processes disappeared from the top of the list. If I moved my mouse
at all, the Java build would wake up for a bit, then stop again 10 or 15
seconds later. The build would easily take several minutes if I didn't
move my mouse much (or hang indefinitely if I didn't move my mouse at
all). If I consistently jiggled my mouse through the entire build, the
performance was approximately what I would expect (35-40s).
I tried the same thing under my normal kernel (SuSE
2.4.21-178-smp) and the build ran continuously with no pauses (35s).
The pauses on 2.6.2-rc1 occured with both 32-bit (Sun) and 64-bit
(Blackdown) Java implementations.
I can't explain it, but if there's any pertinent info I can
provide, I'll be happy to.
Thanks,
Aaron
2x Opteron 248, Tyan Thunder K8W, 4GB RAM, SuSE 9.0 for AMD64
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