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Re: announce: v2.6.20-rt1 yum repository and kernel rpms



1:41pm Ingo Molnar said:

> 
> * Ingo Molnar <mingo elte hu> wrote:
> 
> >  $ ps aux | grep -i prio
> >  root        31  0.0  0.0      0     0 ?        D    Feb05   0:00 [RCU Prio Booste]
> > 
> > that artificially increases the system load average by +1.0. I've 
> > fixed this in my tree and it will be in -rt3 today - it's harmless 
> > otherwise.
> 
> fyi, i've just released the -rt3 rpms - can you still see any weirdness?
> 

It was -rt4 that came down the pike when I checked. And the /proc/loadavg 
still seems decidedly "twitchy" for lack of a better term. It never fully 
settles down. And a few shells running top and tload will eventually drive 
it up to around 1 again. But it never stabilizes. This does not happen 
with the old tickey kernels. And it does not happen in any deterministic 
way I've seen before.

I notice all the irq threads are now -51 priority. And there are quite a 
few of them. Plus the group of RT threads for each CPU. Your RCU Prio 
Booster is only pri -50 and appears to be sleeping hapily. Are there 
better profiling tools I could be running?

../C


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