Re: [Starpu-devel] Task distribution statistics for StarPU

[Ankit Khandelwal <amkhande@umail.iu.edu>]

Hi Samuel,

I did try STARPU_WORKER_STATS but i was puzzled when i found total number of task worked by worker is more than total number of task submitted. I am using matrix multiplication as my example. Here is what i am trying to do at command line STARPU_NCUDA=-1 ./matrixmult 4 4 1024 1024 . I am using work stealing strategy. The first two command line arguments show the partition size. So i am making 4 horizontal and 4 vertical partition which should trigger 16 tasks in total for 1024X1024 size matrix. 

The output of the STARPU_WORKER_STATS is:

CUDA 0 (Tesla C1060 4.0 GiB 08:00.0) 11 task(s)

CPU 0                           1 task(s)

CPU 1                           1 task(s)

CPU 2                           1 task(s)

CPU 3                           1 task(s)

CPU 4                           1 task(s)

CPU 5                           1 task(s)

CPU 6                           1 task(s)

It shows that there are 18 tasks that are worked by worker. Does the count of task indicate task on each queue of the worker or task executed by worker? Can you help me with the understanding on how the count of tasks in STARPU_WORKER_STATS works? 

Regards,

Ankit 

On Tue, Nov 5, 2013 at 1:28 PM, Samuel Thibault <samuel.thibault@ens-lyon.org> wrote:

Ankit Khandelwal, le Tue 05 Nov 2013 18:55:46 +0100, a écrit :

> I was trying to identify the pattern in the distribution of task on CPU and GPU
> by StarPU for a given program using various schedulers and change in
> distribution after using performance models. 

Did you try

STARPU_WORKER_STATS=1

?

Samuel