Red Hat Bugzilla – Bug 436209
Resources tab graphs unclear and blurred and causes high cpu load
Last modified: 2014-06-18 05:10:00 EDT
Description of problem:
The gnome-system-monitor resources tab has 3 horizontal graphs. On my system
for awhile now I've had this tab cause 100% cpu usage (by gnome-system-monitor)
and the graphs are terribly misshapen, blurred, and replicated (see screenshot).
I believe there was some discussion on this (I remember posting this screenshot)
but cannot find where it was (may have been an upstream bug, something about the
new graph style and image rendering?).
Version-Release number of selected component (if applicable):
Every time it is opened.
Steps to Reproduce:
view resources tab, wait for a few seconds to see graphs update incorrectly
view resources tab, see clear, unblurred graphs
I found the discussion:
And upstream bug mentioned there:
Created attachment 297681 [details]
Screenshot of this issue, graphs being drawn incorrectly.
*** Bug 437255 has been marked as a duplicate of this bug. ***
Is this about "100% cpu usage" or about "unclear/blurred graphs"?
They are (as far as available info so far indicates) related issues. The upstream bug has discussion on CPU
usage for drawing the graphs as well as issues of the rendering done incorrectly. I think part of the
problem was that the patches that introduced the new graph drawing style caused huge cpu load because
too many data points were used when the graphs were not very high?
Anyway, both things occur at once right now. The high CPU load usually stops after a short period but the
graphs remain messed up. If you change tabs to the process list and then back to the resources graphs
the CPU load will return for awhile and then stop, and the graphs are still messed up.
I'm willing to work on this but not really sure how to try and figure out how these are related problems.
Appears to be fixed in gnome-system-monitor-2.22.0-1.fc9.i386. Both high load
and blurry graph drawing.