Re: [uml-devel] [PATCH v3] um: Switch clocksource to hrtimers

[Anton Ivanov <anton.ivanov@kot-begemot.co.uk>]

On 31/10/15 19:08, Richard Weinberger wrote:
> Am 31.10.2015 um 17:22 schrieb Anton Ivanov:
>> Richard, can you send me your config.
> Sure. It is basically a defconfig.

I am dragging an old config from some work I did a while back. I will 
scrap it and do a defconfig build one I get back home (I am traveling at 
the moment).

>
>> I have had it running for a couple of days before submission both under load and idle it was doing OK.
> Well, what userspace did you try?

Debian Wheezy and Jessie including a full apt-get update ; apt-get 
dist-upgrade

> I did some more tests, if nanosleep() is called periodically the issue does not arise.
> Maybe your userspace (systemd?) fires the syscall too often. ;)

Either that, or I re-used my old scripts which for a variety of reasons 
do CPU pinning (I do not remember if I turned that off or not before 
testing).

It may be that it does not show up when you are running UML pinned on 
one host CPU. Same as above - I will re-test when I get back home, both 
with my config and and with defconfig.

A

>
> Thanks,
> //richard


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