From: Stefan Hajnoczi <stefanha@gmail.com>
To: Yuxin Ren <ryx@gwmail.gwu.edu>
Cc: qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] how to monitor vm exit
Date: Thu, 15 Sep 2016 11:34:52 +0100 [thread overview]
Message-ID: <20160915103452.GE4214@stefanha-x1.localdomain> (raw)
In-Reply-To: <CAAKbDre787pQbFeAmF0C20vYm=ozOZxfK1+bzrrNc5YueNcJHw@mail.gmail.com>
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On Fri, Sep 02, 2016 at 12:15:57AM +0800, Yuxin Ren wrote:
> 1. How can I track how many vm exit happens during vm execution using
> KVM under Ubuntu?
$ sudo perf record -a -e kvm:kvm_exit
...^C
$ sudo perf report
Samples: 37K of event 'kvm:kvm_exit', Event count (approx.): 37736
Overhead Trace output
49.61% reason IO_INSTRUCTION rip 0x15505 info 610048 0
8.28% reason IO_INSTRUCTION rip 0xee8c9 info 4020000 0
2.32% reason CR_ACCESS rip 0x656 info 0 0
2.32% reason CR_ACCESS rip 0x66d info 0 0
2.30% reason IO_INSTRUCTION rip 0xe702 info 920048 0
2.30% reason IO_INSTRUCTION rip 0xe71c info 920040 0
There are other tools that can do similar things like trace-cmd or raw
ftrace.
The kvm_stat tool is also good but I don't know if it's packaged for
Ubuntu:
https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/html/Virtualization_Deployment_and_Administration_Guide/sect-Troubleshooting-kvm_stat.html
Stefan
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prev parent reply other threads:[~2016-09-15 10:35 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-09-01 16:15 [Qemu-devel] how to monitor vm exit Yuxin Ren
2016-09-15 10:34 ` Stefan Hajnoczi [this message]
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