On Tue, Jun 1, 2010 at 4:54 PM, Brian Rogers <br...@xyzw.org> wrote:
> Leif, what was your pre-patch kernel? I'd be interested in a comparison with 
> this kernel:
> https://launchpad.net/ubuntu/maverick/+source/linux/2.6.34-5.12

I'll check this tonight if I get a chance, thanks.

> It is the same as my PPA kernel except for the patch, so we can look at
> the effect of just the patch.
>
> Also, I took a look at Lucid and Maverick's current kernel config and
> found that for both, -generic kernels on i386 have CONFIG_HZ=250 and
> amd64 has CONFIG_HZ=100. Seems like an odd choice to have two different
> values depending on architecture. It could be a mistake... Also, all the
> kernels have CONFIG_NO_HZ set.
>
> If we want to test different configs, I can set them up as flavours and
> do -100hz and -250hz kernels on my next upload.

Yeah, I checked your kernel config and it's 250Hz so I don't think
that's the cause of the extra wakeups, but I'll make sure the stock
kernel is also 250 tonight.  I don't think it's 100, and I really hope
it isn't 1000.

-- 
Cheers,
Leif

-- 
Tens of wakes per second in "[kernel scheduler] Load balancing tick" on Core 2 
Duo even with only 1 core enabled
https://bugs.launchpad.net/bugs/524281
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