On Sat, Oct 10, 2009 at 01:18:16PM +0400, Michael Tokarev wrote:
> Michael Tokarev wrote:
>> Frederic Weisbecker wrote:
> []
>>>>> Was there swapping going on?
>>>> Not as far as I can see, and sar output agrees.
>>>
>>> But I can read this from you guest traces:
>
> I missed this one yesterday. Note it's GUEST traces
> indeed. Higher (read: non-zero) pgp{in,out} and faults
> values happens in *guest*, not on host (original question
> was if we've swapping in HOST, which'd explain the timer
> issues)
Yeah indeed. But still, that's a strange happenstance.
> [cutting extra all-zero columns]
>>> pgpgin/s pgpgout/s fault/s pgfree/s
>>> 11:44:47 0.00 32.32 907.07 277.78
>>> 11:44:48 27.59 22.99 44.83 150.57
>>> 11:44:49 0.00 33.68 22.11 218.95
>>> [...]
>>> 21:46:54 0.00 31.68 16.83 90.10
>>> 21:46:55 0.00 108.00 17.00 89.00
>>> 21:46:56 9.76 482.93 3890.24 439.02
>>> 21:46:57 0.00 760.00 8627.00 1133.00
>>> 21:46:58 0.00 84.85 2612.12 138.38
>>> 21:46:59 0.00 16.00 17.00 90.00
>>>
>>> So it looks like there was some swapping in when the hrtimer (spuriously)
>>> hanged.
>
> One possible guess. Since the guest hanged for some time, the
> higher values there might be a result of accumulated values for
> several seconds.
May be yeah. I don't know enough about virtual internals so...
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