Re: [PATCH v2] KVM: X86: Limit timer frequency to 200ms

[Wanpeng Li]

2018-05-05 16:36 GMT+08:00 Jan Kiszka <jan.kiszka@xxxxxx>:
> On 2018-05-05 01:44, Wanpeng Li wrote:
>> ping,
>> 2018-05-01 7:35 GMT+08:00 Wanpeng Li <kernellwp@xxxxxxxxx>:
>>> From: Wanpeng Li <wanpengli@xxxxxxxxxxx>
>>>
>>> Anthoine reported:
>>>  The period used by Windows change over time but it can be 1 milliseconds
>>>  or less. I saw the limit_periodic_timer_frequency print so 500
>>>  microseconds is sometimes reached.
>>>
>>> As suggested by Paolo, lower the timer frequency limit to a
>>> smaller interval of 200 ms (5000 Hz) to leave some headroom. This
>>> is required due to Windows 10 changing the scheduler tick limit
>>> from 1024 Hz to 2048 Hz.
>
> "... lower the *default* timer frequency limit to a smaller interval of
> 200 *us* ..." - same for the subject.

Thanks Jan, I will update it.

Regards,
Wanpeng Li