From: "Glauber Costa" <glommer@gmail.com>
To: qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] Re: Performance Monitoring
Date: Thu, 22 May 2008 00:46:44 -0300 [thread overview]
Message-ID: <5d6222a80805212046l5c3e6f38q381656abf7a1f613@mail.gmail.com> (raw)
In-Reply-To: <g11hhk$99u$1@ger.gmane.org>
On Wed, May 21, 2008 at 1:10 PM, Charles Duffy
<Charles_Duffy@messageone.com> wrote:
> Cheif Jones wrote:
>>
>> I'm doing a research project in which i want to run an OS under an
>> emulator for a period of time and get full CPU opcode statistics (how many
>> times every opcode was executed). As far as i understand the Qemu design, it
>> is doing "JIT" translation of terget opcode to host opcodes to improve
>> performance, and so there is no easy way to count target opcodes (e.g a loop
>> is compiled JIT and runs natively).
>
> Is an actual emulator necessary, or could you use something like an
> instrumented UML kernel? I'd think that would be a much simpler approach.
Since he claims to need opcode statistics, and UML won't trap any
instruction but the privileged ones, does not seem feasible.
--
Glauber Costa.
"Free as in Freedom"
http://glommer.net
"The less confident you are, the more serious you have to act."
next prev parent reply other threads:[~2008-05-22 3:46 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-05-20 18:56 [Qemu-devel] Performance Monitoring Cheif Jones
2008-05-20 22:06 ` Paul Brook
2008-05-21 0:09 ` Vince Weaver
2008-05-21 6:41 ` Laurent Desnogues
2008-05-20 22:44 ` Stanislav Shwartsman
2008-05-21 16:10 ` [Qemu-devel] " Charles Duffy
2008-05-22 3:46 ` Glauber Costa [this message]
2008-05-22 6:13 ` Cheif Jones
2008-05-23 3:38 ` Vince Weaver
2008-05-25 12:22 ` Cheif Jones
2008-05-28 0:21 ` Vince Weaver
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