Re: [Starpu-devel] Strange behaviour using GPUs

[Samuel Thibault <samuel.thibault@ens-lyon.org>]

Xavier Lacoste, le Wed 10 Jul 2013 11:43:46 +0200, a écrit :
> I still have some things I can't explain with my traces (eg. 
> http://img46.imageshack.us/img46/7026/ojb.png)
> 
> I can see a large period where nothing is done (around 50000) and a data 
> movement performed with dates : 63306.3 - 28261 which are killing the 
> performances.

I don't understand either. The pink color is when we are waiting for a
cuda memory transfer to terminate, so I'd to think the issue is inside
CUDA...

> I also had a question about fxt, how do I set the buffer size to be sure 
> all the event will be registered without having to synchronize on disk, is 
> there a macro, a compilation option ?

This is the trace_buffer_size field of the starpu_conf structure.

Samuel