Date: Tue, 10 Jun 2014 16:54:50 +0200 From: Willem Jan Withagen <wjw@digiware.nl> To: Peter Grehan <grehan@freebsd.org> Cc: FreeBSD virtualization <freebsd-virtualization@freebsd.org> Subject: Re: Bheve: Slow linux syscalls on AMD Message-ID: <53971C3A.30406@digiware.nl> In-Reply-To: <53970F5A.8060900@freebsd.org> References: <5388B56D.1000501@digiware.nl> <20140530212900.6B74B6BF@hub.freebsd.org> <53891BC1.9050701@digiware.nl> <53891EAA.8040105@freebsd.org> <538927FC.3000903@digiware.nl> <53939AE2.80804@freebsd.org> <539434B6.6020804@digiware.nl> <CALnRwMQFmQRxg0jWi5tqXFXARsj-sD5F3wAAXdTvNf7%2BVPoezw@mail.gmail.com> <5394817F.4030203@digiware.nl> <53948DA5.4040000@digiware.nl> <53962141.8070702@freebsd.org> <5396D18C.8000401@digiware.nl> <53970F5A.8060900@freebsd.org>
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On 2014-06-10 15:59, Peter Grehan wrote:
> Hi Willem,
>
>> On 2014-06-09 23:04, Peter Grehan wrote:
>>>> Still seeing that a 2 CPU VM is using about 100% of 1 cpu when idleing,
>>>> but that is another minor challenge.
>>>
>>> Fixed in r267305
>>
>> Ack.
>>
>> There is still a small difference in behaviour between Linux and
>> FreeBSD. But I'd call that negectable...
>>
>>
>> PID SIZE STATE C TIME WCPU COMMAND
>> 70250 2075M vmidle 5 0:17 2.69% bhyve: ubuntu-14.04 (bhyve){vcpu 1}
>> 70250 2075M vmidle 2 0:22 1.37% bhyve: ubuntu-14.04 (bhyve){vcpu 0}
>
> Thanks - saw similar behaviour on my tiny Sempron but wasn't sure if
> it was the slow CPU/clock aliasing etc. Time to bring out KTR and see
> what's going on.
I've got KTR compiled in, but last time I switched it on.
I got swamped in traffic, and I sort of got locked out of the server... :(
Could also be because I was writing it to a file as well.
So you'll have to help/tell me what to do.
--WjW
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