From: Avi Kivity <avi@qumranet.com>
To: "David S. Ahern" <daahern@cisco.com>
Cc: Terry <terry.cchang@gmail.com>, kvm@vger.kernel.org
Subject: Re: time command in vm
Date: Wed, 03 Sep 2008 12:37:50 +0300 [thread overview]
Message-ID: <48BE5AEE.6080204@qumranet.com> (raw)
In-Reply-To: <48BD6F43.4090107@cisco.com>
David S. Ahern wrote:
> Terry wrote:
>
>> Hi All,
>>
>> When we use time command in vm, we can get 'elapsed time', 'user time'
>> and 'system time'. How to explain these three times in detail? For
>> example, when we have a shadow page fault, we exit from guest to host
>> for handling the fault. So, this handling time should be considered in??
>>
>>
>
> I believe the time spent within kvm handling faults and such for the
> guest shows up as system time to the guest.
>
It depends. If the fault happens in guest userspace, it would be
accounted as guest user time. From the guest's point of view, it's just
a slow memory access.
--
error compiling committee.c: too many arguments to function
prev parent reply other threads:[~2008-09-03 9:37 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-08-30 2:53 time command in vm Terry
2008-09-02 16:52 ` David S. Ahern
2008-09-03 7:43 ` Christian Borntraeger
2008-09-03 9:37 ` Avi Kivity [this message]
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