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Re: [Pan-users] Re: freeze, high CPU getting new headers


From: Kurt Schilling
Subject: Re: [Pan-users] Re: freeze, high CPU getting new headers
Date: Fri, 08 Aug 2008 20:54:38 -0400
User-agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.16) Gecko/20080708 Thunderbird/2.0.0.16 Mnenhy/0.7.5.666

walt wrote:
On Thu, 07 Aug 2008 15:57:21 -0400, Kurt Schilling wrote:

Greg Lee wrote:
On Mon, 04 Aug 2008 18:32:34 +0000, Matthijs Benschop wrote:

Btw, I always get segfault when closing 'post article' window and when
expanding the group list in the left pane...
I also get a fault when I attempt to expand the unsubscribed group
list. That has happened ever since I started using Pan a little over a
year ago. (I work around it by entering patterns in the Group Name box
and viewing unsubscribed groups that way.)


...
In terms of the current discussion of the high CPU cycles, I have not
seen this with previous versions of xorg. But since the installation of
HH8.04, I have consistent high cpu cycling. It seems that this is a
known bug in Ubuntu that is related to xorg and the System Monitor...

Thanks for letting us know about this, Kurt.  Just to clarify a bit,
this high CPU usage you refer to happens even without running pan?
Do you mean it happens only when running System Monitor?  Is that the
gnome system monitor panel applet, or something else?

As I've been trying to track things down on my machine, I installed htop. What I find is that htop and/top/gnome-sysmonitor and xorg are the primary culprits in hogging cpu cycles. If you open the GUI for SysMon, the CPU pegs out at 100% and stays there. So on my machine it is apparently something related to htop/top in the CLI mode or the Gnome-SysMon (GUI). If there was some other way of looking at CPU cycling/resource utilization I'd be glad to try it.




In any case, I don't see the problem on my install of Ubuntu 8.04, but
I do compile my own kernel FWIW.

Here's the link and most of the pertinent text:

<q>
https://bugs.launchpad.net/ubuntu/+source/gnome-system-monitor/+bug/187383

Binary package hint: gnome-system-monitor

Just opening system monitor (not sure if it's always) causes one of my CPUs to go to 100% usage. The process Xorg is the one that actually has all the CPU usage but I guess it must be system-monitors fault.

$ cat /etc/lsb-release
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=8.04
DISTRIB_CODENAME=hardy
DISTRIB_DESCRIPTION="Ubuntu hardy (development branch)"
dpkg -l | grep xorg-core
ii xserver-xorg-core 2:1.4.1~git20080118-1ubuntu2 Xorg X server - core server
$ dpkg -l | grep gnome-system
ii gnome-system-monitor 2.21.5-0ubuntu1 Process viewer and system resource monitor f

I tried to find out what was going on and started a strace on the Xorg process and that completely locked upp my system. Tried to switch to a console with ctrl-alt-f1 but no success. Remotely connected to the system with SSH and found that the CPU usage was good and as soon as I killed -9 the strace process the system was OK again.

<q>

IIRC this bug was filed apparently several months ago.


Oh, and most important of all, are you running the 64-bit Ubuntu?


No, just the plain-jane 32-bit HH with the generic kernel. 2.6.19-24 IIRC. No enough horsepower on my machines to compile my own kernel :-{
Not that I'm adept enough to try it ATM, still quite the rookie at *nix.

With warm regards,

Kurt Schilling




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