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Re: emacs 22.1 hogging CPU

From: David L
Subject: Re: emacs 22.1 hogging CPU
Date: Tue, 19 Jun 2007 08:59:25 -0700

I started emacs like this:
emacs -l shared/sw/gvu/src/../bin/fc6debug1_1t/gtkview.nep2 -f nep-build-and-load-tags -title >"fc6debug1_1t gtkview"

For several minutes after I started it, emacs was using between 10%
and 40% of a 3GHz P4.  This problem is either new with the 22.1
release or is much worse now.  I don't know how to profile emacs
to tell what's using the CPU, but emacs appears to be doing nothing
at the time except waiting for user input... the building and loading
of etags had long since finished.

emacs is now using 98.1% of a P4 3GHz while apparently doing
nothing.  It is continuously using more than 50%.
Here's the output of top:
26022 rmel  39  19  104m  37m  10m R 98.1  1.9  51:01.88 emacs

One of my co-workers is logged into my machine running emacs and
it is his session that is hogging the CPU.  I just went and talked to him
and he wasn't doing anything in that session.  He had left the emacs
code browser open, so I asked him to deactivate it to see if that would
make the problem go away.  It did not.  Is there a way to get emacs to
profile itself while this problem is happening so I can provide some
more useful debugging info?


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