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Re: timekeeping regression?
>>>>> Brad Spencer <brad%anduin.eldar.org@localhost> writes:
> "Greg A. Woods" <woods%planix.ca@localhost> writes:
>>
>> At 2024年3月20日 03:31:00 +0000, "Mathew, Cherry G.*" <c%bow.st@localhost> wrote:
>> Subject: Re: timekeeping regression?
>>>
>>> I think the problem here is that there's no clarity in the API
>>> about ownership. So we'll probably need to have a look at what
>>> linux and/or FreeBSD does, to understand what the current
>>> consensus is - this seems to be the linux way of documentation -
>>> a sort of mob rules situation.
>>
>> Hmmm... FreeBSD (14.0) is now the only domU system I have that's
>> been keeping time properly, even with the dom0 running on one
>> pinned CPU.
>>
>> All the NetBSD systems have experienced large time drifts after
>> about 7 days of uptime.
>>
>> So, yeah, FreeBSD is doing something right/better!
>>
>> -- Greg A. Woods <gwoods%acm.org@localhost>
>>
>> Kelowna, BC +1 250 762-7675 RoboHack <woods%robohack.ca@localhost> Planix,
>> Inc. <woods%planix.com@localhost> Avoncote Farms <woods%avoncote.ca@localhost>
>>
> I have lost track... is your FreeBSD domain a pure PVH or a normal
> PV or PVSHIM?? All of my multi-vcpu pure PVH guests can keep time
> pretty well, but nearly all multi-vcpu PV guest (pure PV or
> PVSHIM) will tend to lose their minds after a while, although not
> in the same way you have been describing.
Can you confirm that you see this only on PV/PVSHIM ?
Also, do you see this on any other OS (I believe linux still has the
ability to run pure PV ?).
--
Math/(~cherry)
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