Re: [Gems-users] GEMS performance and hardware configuration

[Dan Gibson <degibson@xxxxxxxx>]

Thomas,

The short answer is: We all pull our hair out waiting for simulations to finish. Others have reported relative slowdowns in the neighborhood of 30,000x.

The longer answer is:
* We do everything possible to start Ruby at the last possible moment. I.e. run through thread startup, warmups, etc., in 'Simics-only', then load Ruby once meaningful computation actually begins.
* We run a lot of simulations concurrently, aiming for throughput
* We don't try to do I/O operations under timing mode (at least not I/O with realistic timing)

Regards,
Dan

On Fri, Jan 30, 2009 at 5:27 AM, Thomas Canhao Xu <canxu@xxxxxx> wrote:

Hi all!

 I am running GEMS/Simics in Linux(AMD Turion TL-58 Dual-Core 1.9Ghz,
2GB memory) and I find the performance is really intolerable(even a
"ls" in Solaris could take 30 seconds!), I wonder how your guys deal
with it? Do I need a powerful machine or some specific configuration?

 Thanks!

Respectfully yours,

Thomas Canhao Xu

B5045, 5th floor, ICT-Building,
Department of Information Technology,
Joukahaisenkatu 3-5 B,
20520 University of Turku
Turku, Finland

CV: http://users.utu.fi/canxu
Tel: +358-2-3336442
Fax: +358-2-3336950
Mob: +358-2-466694380
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