From: Avi Kivity <avi@redhat.com>
To: Gleb Natapov <gleb@redhat.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>, kvm@vger.kernel.org
Subject: Re: [PATCH] trace "exit to userspace" event
Date: Thu, 14 Oct 2010 14:10:04 +0200 [thread overview]
Message-ID: <4CB6F31C.9090300@redhat.com> (raw)
In-Reply-To: <4CB6F2E6.9010604@redhat.com>
On 10/14/2010 02:09 PM, Avi Kivity wrote:
> On 10/14/2010 01:47 PM, Gleb Natapov wrote:
>> >
>> > You can always filter excess information away. If you're looking
>> > for exits to userspace (a major performance issue) then you want to
>> > see both normal exits and signal exits.
>> >
>> How do I do it via /debug file system? Now I just echo name of the event
>> I am interested in set_event, how do I add filter to that?
>
> echo exit_reason==33 >
> /sys/kernel/debug/tracing/events/kvm/kvm_exit/filter
>
Or, easier,
trace-cmd record -e kvm:kvm_exit -f exit_reason==33
--
error compiling committee.c: too many arguments to function
prev parent reply other threads:[~2010-10-14 12:10 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-10-05 13:14 [PATCH] trace "exit to userspace" event Gleb Natapov
2010-10-07 16:18 ` Marcelo Tosatti
2010-10-07 17:56 ` Gleb Natapov
2010-10-08 0:49 ` Marcelo Tosatti
2010-10-08 16:44 ` Gleb Natapov
2010-10-10 8:45 ` Avi Kivity
2010-10-10 15:46 ` Gleb Natapov
2010-10-14 10:27 ` Avi Kivity
2010-10-14 10:29 ` Gleb Natapov
2010-10-14 11:11 ` Avi Kivity
2010-10-14 11:28 ` Gleb Natapov
2010-10-14 11:32 ` Avi Kivity
2010-10-14 11:41 ` Gleb Natapov
2010-10-14 11:43 ` Avi Kivity
2010-10-14 11:47 ` Gleb Natapov
2010-10-14 12:09 ` Avi Kivity
2010-10-14 12:10 ` Avi Kivity [this message]
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