Re: [Starpu-devel] StarPu: performance model doesn't work

[Cedric Augonnet <cedric.augonnet@inria.fr>]

Hello Lu Li,

It looks like you only have obtained one measurement for each task? The 
heft/dmda policies try to have some minimum number of samples before 
considering that the model is calibrated...

Are you still running with the STARPU_CALIBRATE flag set to 1 when you 
observe this weird behaviour?

Perhaps you can give us your test-case and specify the different environment  
in case it is simple enough to be shared?

Thanks for your report!

Cedric
Le 13 juin 2011 à 10:44, Leo Li a écrit :

> Hi, Everybody
> 
> My name is Lu Li. I am a master student at Linkoping University, Sweden.
> 
> I currently do my master thesis based on StarPU under professor
> Christoph W. Kessler. And I got a problem, could someone help me.
> Thanks.
> 
> My problem is the performance model doesn't help the scheduling. After
> calibration, I get data shown in attachment1. From the data we can see
> the scheduler should pick CPU platform to run. Actually what I
> observed was that the schedulers always picked CUDA. I have tried
> heft, dmda, dm schedulers, and they all pick CUDA. It seems they don't
> take performance data into account. Anybody who can help me?
> 
> Thanks in advance.
> 
> -- 
> Faithful
> Lu Li
> 
> 
> Contact: +46704759692
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