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Re: X using ~ 35% of a CPU core

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On Mon, 2015-11-30 at 13:44 -0500, Celejar wrote:
> Hi,
> 
> On my ThinkPad T61 (Core 2 Duo T7300 @ 2.00GHZ) running Debian stable
> (8.2) with Xfce, the X process (/usr/bin/X) has recently begun to
> consume some 35% (seems to vary between 33-40 %) for several minutes
> at
> a time, with the system becoming unpleasantly unresponsive during
> this
> time. It seems to mostly happen after resuming from suspend-to-ram,
> and
> usually clears up after a few minutes with the system performance
> returning to normal. I run mostly straightforward stable, albeit with
> self-compiled kernels from upstream (vanilla). I first noticed the
> problem on 4.1.13 and am now seeing it under 4.2.6. I don't think
> I've
> seen this behavior in the past, and I'm not sure what has triggered
> it.
> I see it even when not running much of a load under X at all, e.g.,
> just recently, when all I had running was Xfce Terminal, Sylpheed,
> and
> one (simple, small) OpenOffice writer document. Any idea what this
> is,
> or how I can fix / troubleshoot?
> 
> Thanks,
> Celejar

Long shot, but maybe it's something similar to this? Probing for new
screens after resume and spamming a log before giving up?

https://bbs.archlinux.org/viewtopic.php?id=204098

Would be interesting to know where the X process spends all that time,
but I guess you would need to profile it to find out.

-- 
Cheers,
Sven Arvidsson
http://www.whiz.se
PGP Key ID 6FAB5CD5

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Thread

X using ~ 35% of a CPU core Celejar <celejar@gmail.com> - 2015-11-30 19:50 +0100
  Re: X using ~ 35% of a CPU core Sven Arvidsson <sa@whiz.se> - 2015-11-30 21:50 +0100
    Re: X using ~ 35% of a CPU core Celejar <celejar@gmail.com> - 2015-12-02 00:20 +0100
      Re: X using ~ 35% of a CPU core Sven Arvidsson <sa@whiz.se> - 2015-12-02 16:00 +0100
        Re: X using ~ 35% of a CPU core Celejar <celejar@gmail.com> - 2015-12-03 06:10 +0100

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