instrumentation tools choice for detailed simulator

[hftsin]

Hi all,

I am hacking a detailed x86 simulator. I need to employ binary
instrumentation tools to obtain program running trace thus I will feed
it to the simulator engine. However, for Intel PIN and DynamoRIO, I am
not sure which one can fits my requirement. The performance of
instrumentation is important to me, then which one is better? Can you
give any suggestions?

Thanks,
Hanfeng

[Timur Iskhodzhanov]

Hi Hanfeng,

How large are the apps you want to run under the simulator?
An empty PIN client (= no valuable instrumentation) takes about a
minute to start Chrome, for example...
If app loading speed is a concern for you, personally I'd recommend to
stick with DR.

--
Timur

> Thanks,
> Hanfeng
>
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[Qin Zhao]

If you care about performance, I would say go for DR.

Qin

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[hftsin]

Hi Timur,

Thanks for your suggestions.

Specifically, I need to feed the simulator with program trace on the fly instead of offline trace generation. Dynamic trace feeding has been implemented in CMP$im which is based on PIN. Can DR meet this requirement?

To save simulation time, I would select representative code regions as program trace input. But the data set may be another problem. Can DR performs well for large data set?

Best,

Hanfeng

On Monday, April 23, 2012 10:17:00 PM UTC+8, Timur Iskhodzhanov wrote:

On Mon, Apr 23, 2012 at 7:51 AM, hftsin <hanfen...@gmail.com> wrote:
> Hi all,
>
> I am hacking a detailed x86 simulator. I need to employ binary
> instrumentation tools to obtain program running trace thus I will feed
> it to the simulator engine. However, for Intel PIN and DynamoRIO, I am
> not sure which one can fits my requirement. The performance of
> instrumentation is important to me, then which one is better? Can you
> give any suggestions?
Hi Hanfeng,

How large are the apps you want to run under the simulator?
An empty PIN client (= no valuable instrumentation) takes about a
minute to start Chrome, for example...
If app loading speed is a concern for you, personally I'd recommend to
stick with DR.

--
Timur

> Thanks,
> Hanfeng
>
> --
> You received this message because you are subscribed to the Google Groups "DynamoRIO Users" group.

> To post to this group, send email to dynamorio-users@googlegroups.com.
> To unsubscribe from this group, send email to dynamorio-users+unsubscribe@googlegroups.com.

[Reid Kleckner]

I would say that running a large *codebase* can be slow, but running an app over lots of data is typically quite fast.

For example, DR without any instrumentation can run bzip2 from SPEC2k6 at near native speeds over large files.

However, launching Chrome under plain DR (no client/tool) has a ~2x slowdown, because it has so much code, as well as the fact that it uses self-modifying code.  (Not sure if that number is quite right.)

Reid

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