Re: [PATCH] Dynamic tick for x86 version 050602-2

Christian Hesse
2005-06-02T20:17:25Z

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On Thursday 02 June 2005 19:42, Tony Lindgren wrote:
> * Christian Hesse <mail@earthworm.de> [050602 01:31]:
> > On Thursday 02 June 2005 03:36, Tony Lindgren wrote:
> > > Hi all,
> > >
> > > Here's an updated version of the dynamic tick patch.
> > >
> > > It's mostly clean-up and it's now using the standard
> > > monotonic_clock() functions as suggested by John Stultz.
> > >
> > > Please let me know of any issues with the patch. I'll continue to do
> > > more clean-up on it, but I think the basic functionality is done.
> >
> > I would like to test it, but have some trouble. The patch applies cleanly
> > and everything compiles fine, but linking fails:
> >
> > [ linker errors ]
>
> Should be fixed now, the header was defining it as a function un UP
> system with no local apic. Can you try the following version?

This one compiles and links without problems.

The reason I want to use this patch is that I hear a high pitched noise [1]
when running with 1000Hz and the processor is idle. With this patch I could
use 1000Hz without any noise.

But I found some problems on my system:

- time does not run the correct speed, it was some minutes in future after I
had compiled a new kernel

- pressing a key on the keyboard sometimes results in two or more characters,
not only one

- mouse misses some events, e.g. clicks are not recognized (synaptics
touchpad)

- using software suspend 2.1.8.10 I can suspend the system, but it hangs while
resuming

Anyway, thanks for your great work! Let me know if you have new versions to
test.

[1] http://bugme.osdl.org/show_bug.cgi?id=2478

--
Christian

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