Public bug reported:
Binary package hint: xfce4-systemload-plugin
Ubuntu has set the goal for mobile devices to last longer on a single
battery charge. This can be done by several things, of which keeping the
amount of wakening the processor to a minimum. Tickless-kernels was a
great move forward and now they advice to have around 50 interrupts per
second for a fully but idle desktop.
xfce4-systemload-plugin 1:0.4.2-1ubuntu3, which has been released for
hardy and intrepid, did 4 interrupts per second. This gives the user
every 250 milliseconds an update of the systems load. This is a
reasonable value for something that has to present non-crucial and more
or less real-time info.
xfce4-systemload-plugin 1:0.4.2-3ubuntu1, which has been released for
karmic and lucid, is doing 12 interrupts per second. This makes it
almost the second top-cause for wakening the processor after the kernels
function itself. It also takes as much as a quarter of the "allowed" 50
interrupts. Giving this non-crucial info every 85 milliseconds is not
reasonable since the user will not gain any informative info. If you
program gets stuck and your processor goes up to 100% load, you'll
notice this in the same way on a 250 millisecond update as on a 85
millisecond update. I think this is just unnecessary usage of processor-
cycles and power.
Possible solutions:
1) Set the value back to a 4Hz update, like it has been.
2) Provide a simple option to let the user chose the update frequency, like
already done in the xfce4-sensors-plugin.
** Affects: xfce4-systemload-plugin
Importance: Undecided
Status: New
** Affects: xfce4-systemload-plugin (Ubuntu)
Importance: Undecided
Status: New
** Also affects: xfce4-systemload-plugin
Importance: Undecided
Status: New
** Summary changed:
- Wakes processor why to often than needed
+ Wakes processor way to often than needed
--
Wakes processor way to often than needed
https://bugs.launchpad.net/bugs/506884
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