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Serious GC problem in HEAD
From: |
Ludovic Courtès |
Subject: |
Serious GC problem in HEAD |
Date: |
Mon, 06 Nov 2006 10:24:16 +0100 |
User-agent: |
Gnus/5.110006 (No Gnus v0.6) Emacs/21.4 (gnu/linux) |
Hi,
Neil Jerram <address@hidden> writes:
> That's the latest position. My guess is that the long periods where
> nothing happens except CPU burning are huge GCs, and that some GC bug
> affecting multiple threads means that these GCs never actually free
> anything (or not as much as they should, anyway). Any ideas or other
> datapoints would be much appreciated. Does the Boehm GC handle
> multiple threads? If it does, perhaps I should try out Ludovic's
> BGC-Guile.
Is it 1.8 or HEAD?
Actually, I'm suspecting my gc-stats patch [0] to cause some GC problems
(although this is quite unexpected since it touches only stat
information). For instance, consider the following program:
$ guile -e '(let loop ((a 0)) (loop a))'
If `guile' is HEAD, then the memory consumption of that process (as
shown by `top') continuously increases and at a pretty high rate (!).
If `guile' is 1.8, then that does not happen.
I will try to dig it further and see whether/what can be done. In the
meantime, you could try to revert the patch.
Thanks,
Ludovic.
[0] http://lists.gnu.org/archive/html/guile-devel/2006-01/msg00009.html
Serious GC problem in HEAD,
Ludovic Courtès <=
Re: A guile story, Kevin Ryde, 2006/11/28