[ icewm-Patches-1723213 ] PowerTOP: implement fuzzy timer timeouts

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Patches item #1723213, was opened at 2007-05-22 06:09
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Category: None
Group: None
Status: Open
Resolution: None
Priority: 7
Private: No
Submitted By: Andreas Mohr (andim2)
Assigned to: Nobody/Anonymous (nobody)
Summary: PowerTOP: implement fuzzy timer timeouts

Initial Comment:
Hello,

running Intel's new TimerTOP utility I noticed that icewm is pretty much the top cause for idle wakeups.
With my patch to allow merging timer timeouts (fuzzy timeout) I was able to kick the wakeups down from about 6 per second to 1.6 per second.
It's still a bit buggy, though (fixed-timeout timers such as the taskbar clock DON'T fire at the correct moment for some strange reason), which is why I'm merely "announcing" the patch right now to let others take notice, the real patch will follow in a day or two.

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Comment By: Nobody/Anonymous (nobody)
Date: 2009-06-19 23:29

Message:
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Comment By: Andreas Mohr (andim2)
Date: 2008-03-24 19:50

Message:
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Changed Summary to reflect TimerTOP -> PowerTOP evolution.

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Comment By: Andreas Mohr (andim2)
Date: 2008-03-24 19:48

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Hi, any comments so far? Not sure whether I'll be able to work on it
soonish, but insightful comments could be useful anyway... thanks!

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Comment By: Andreas Mohr (andim2)
Date: 2007-05-23 20:48

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OK, here it is (or at least an initial version of it, whatever you may
think of it).
Fixed-timeout timers now fire at the correct moment (taskbar clock), which
is why wakeups are now reduced from 6 down to < 3 per second only.
I'm not sure about the naming of "DelayFuzziness". Any better, more
descriptive name perhaps?
Since the new timeout analysis code is slightly non-trivial, could someone
review it?
Default delay fuzziness is 10% of the delay value, which works quite
nicely already to reduce wakeups.
One may want to enhance the code to allow for setting different fuzziness
values for individual timers (e.g. some timers might be so unimportant that
a very high fuzziness is ok).

Comments?

Thanks!

I'm now going to work on another patch to reduce wasteful IceWM CPU use
which I just discovered.
File Added: icewm-1.2.30.fuzzy_timers.diff

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