[Bug 214695] [NEW] wrong percentage with frequency scaling

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[Bug 214695] [NEW] wrong percentage with frequency scaling

marwal
Public bug reported:

In system monitor under the tab Processes I can see no process is using more than 10% CPU.
When I select Resources I see CPU1 at 12% and CPU2 at about 40-50%.

If I set the frequency scaling applet to not limit CPU usage and run at
3,20 GHz instead of 400 MHz the percentage in both tabs are compatible.

So, Resources calculates percentage based on what speed my CPU is capped
to but Processes always use the value my processor is capable of.

(Using Gnome)

** Affects: hardy-backports
     Importance: Undecided
         Status: New

** Description changed:

- I system monitor under the tab Processes I can se no process is using more than 10% CPU.
+ In system monitor under the tab Processes I can se no process is using more than 10% CPU.
  When I select Resources I see CPU1 at 12% and CPU at about 40-50%.
 
  If I set the frequency scaling applet to not limit CPU usage and run at
  3,20 GHz instead of 400 MHz the percentage in both tabs are compatible.
 
  So, Resources calculates percentage based on what speed my CPU is capped
  to but Processes always use the value my processor is capable of.

** Description changed:

- In system monitor under the tab Processes I can se no process is using more than 10% CPU.
+ In system monitor under the tab Processes I can see no process is using more than 10% CPU.
  When I select Resources I see CPU1 at 12% and CPU at about 40-50%.
 
  If I set the frequency scaling applet to not limit CPU usage and run at
  3,20 GHz instead of 400 MHz the percentage in both tabs are compatible.
 
  So, Resources calculates percentage based on what speed my CPU is capped
  to but Processes always use the value my processor is capable of.
+
+ (Using Gnome)

** Description changed:

  In system monitor under the tab Processes I can see no process is using more than 10% CPU.
- When I select Resources I see CPU1 at 12% and CPU at about 40-50%.
+ When I select Resources I see CPU1 at 12% and CPU2 at about 40-50%.
 
  If I set the frequency scaling applet to not limit CPU usage and run at
  3,20 GHz instead of 400 MHz the percentage in both tabs are compatible.
 
  So, Resources calculates percentage based on what speed my CPU is capped
  to but Processes always use the value my processor is capable of.
 
  (Using Gnome)

--
wrong percentage with frequency scaling
https://bugs.launchpad.net/bugs/214695
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[Bug 214695] Re: wrong percentage with frequency scaling

Greg Grossmeier
Not an issue for Hardy Backports, assigning to gnome-system-monitor.

What version of Ubuntu are you using and what version of gnome-system-
monitor are you using?

Thanks!


** Changed in: hardy-backports
       Status: New => Invalid

** Also affects: gnome-system-monitor (Ubuntu)
   Importance: Undecided
       Status: New

** Changed in: gnome-system-monitor (Ubuntu)
       Status: New => Incomplete

** Changed in: gnome-system-monitor (Ubuntu)
   Importance: Undecided => Low

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wrong percentage with frequency scaling
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[Bug 214695] Re: wrong percentage with frequency scaling

marwal
In reply to this post by marwal
~$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 8.04
Release: 8.04
Codename: hardy

~$ apt-cache show  gnome-system-monitor | grep Version
Version: 2.22.0-1ubuntu3

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wrong percentage with frequency scaling
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[Bug 214695] Re: wrong percentage with frequency scaling

Greg Grossmeier
In reply to this post by marwal
This has been reported to the developers of the software.  You can track
the status and add comments here:
http://bugzilla.gnome.org/show_bug.cgi?id=530268

** Bug watch added: GNOME Bug Tracker #530268
   http://bugzilla.gnome.org/show_bug.cgi?id=530268

** Also affects: gnome-system-monitor via
   http://bugzilla.gnome.org/show_bug.cgi?id=530268
   Importance: Unknown
       Status: Unknown

** Changed in: gnome-system-monitor (Ubuntu)
       Status: Incomplete => Confirmed

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[Bug 214695] Re: wrong percentage with frequency scaling

Sebastien Bacher
In reply to this post by marwal
** Changed in: gnome-system-monitor (Ubuntu)
     Assignee: (unassigned) => Ubuntu Desktop Bugs (desktop-bugs)
       Status: Confirmed => Triaged

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[Bug 214695] Re: wrong percentage with frequency scaling

Bug Watch Updater
In reply to this post by marwal
** Changed in: gnome-system-monitor
       Status: Unknown => Confirmed

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[Bug 214695] Re: wrong percentage with frequency scaling

Greg Grossmeier
In reply to this post by marwal
Question for marwal from upstream:

Does top have the same behaviour ?

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wrong percentage with frequency scaling
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[Bug 214695] Re: wrong percentage with frequency scaling

marwal
In reply to this post by marwal
[quote]Does top have the same behaviour ?[/quote]

I don't understand that question. Does top have different views where
percentage is calculated in incompatible ways? If that was the question
the answer is "no" as far as I believe.

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[Bug 214695] Re: wrong percentage with frequency scaling

Sebastien Bacher
In reply to this post by marwal
open a command line, type top there and look at what processes are
listed and how much cpu they use, now what values have those in gnome-
system-monitor?

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[Bug 214695] Re: wrong percentage with frequency scaling

marwal
In reply to this post by marwal
Seems like top uses a third method of calculating process usage.
Including screenshots for 400Mhz and 3.20Ghz.

** Attachment added: "screenshots.tar.gz"
   http://launchpadlibrarian.net/14017220/screenshots.tar.gz

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[Bug 214695] Re: wrong percentage with frequency scaling

Bug Watch Updater-4
In reply to this post by marwal
** Changed in: gnome-system-monitor
   Importance: Unknown => Low

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wrong percentage with frequency scaling
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[Bug 214695] Re: wrong percentage with frequency scaling

Bug Watch Updater-4
In reply to this post by marwal
** Changed in: gnome-system-monitor
       Status: Confirmed => Expired

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https://bugs.launchpad.net/bugs/214695

Title:
  wrong percentage with frequency scaling

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