Re: kvm guest: hrtimer: interrupt too slow

[Michael Tokarev <mjt@tls.msk.ru>]

Marcelo Tosatti wrote:
[snip]

> Would be useful to collect sar (sar -B -b -u) output every one second
> in both host/guest. You already mentioned load was low, but this should
> give more details.

Here we go:  http://www.corpit.ru/mjt/hrtimer-interrupt-too-slow/

Two incindents - cases when hrtimer: interrupt is too slow were
reported in the guest (with Marcelo's patch so that min_delta is
increased to 50% only), happened at 11:44:48 and 21:46:56 (as
shown in guest-dmesg file).  For both, there's `sar -BWbd' output
for a 2-minute interval (starting one minute before the delay
and ending one minute after) from both host and guest.

> Was there swapping going on?

Not as far as I can see, and sar output agrees.

/mjt