From: Avi Kivity <avi@redhat.com>
To: sheng qiu <herbert1984106@gmail.com>
Cc: kvm <kvm@vger.kernel.org>, linux-kernel@vger.kernel.org
Subject: Re: lots of APIC_TMICT exit on VM with assigned NIC
Date: Thu, 12 Jul 2012 11:50:51 +0300 [thread overview]
Message-ID: <4FFE8FEB.2020606@redhat.com> (raw)
In-Reply-To: <CAB7xdinLSMBFtNa2sLBvNKE0H7cmfOr05+jVStd63MS5maP9VQ@mail.gmail.com>
On 07/12/2012 02:54 AM, sheng qiu wrote:
> Hi all,
>
> i saw lots of APIC_TMICT exits while running a linux guest with
> assigned NIC. The APIC_TMICT exits is only a little fewer than the
> number of injected interrupts while handling network traffic on the
> assigned NIC.
> The network traffic was generated by running netperf on another
> machine targeted at the VM.
>
> Is this normal? if not, what kind of problem may cause it?
I'm guessing the driver sets a timer on every interrupt.
What is the value written? If it's large, perhaps we can set some slack
on the timer so it's not re-set every time.
--
error compiling committee.c: too many arguments to function
next prev parent reply other threads:[~2012-07-12 8:50 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-07-11 23:54 lots of APIC_TMICT exit on VM with assigned NIC sheng qiu
2012-07-12 8:50 ` Avi Kivity [this message]
2012-07-12 17:32 ` sheng qiu
2012-07-15 8:03 ` Avi Kivity
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