[Starpu-devel] Moving Workers from One Context To Another in Real Time

[Gabriel Gazolla <gabrielgazolla@gmail.com>]

Hello StarPU Team,

I have an interesting question, I hope you can help me...

Imagine this situation:

I have two contexts: Context 1 (CPU1, CPU2, CPU3) and Context 2 (GPU1)

With starPU paused i submit 900 tasks to Context 1 and 100 tasks to Context 2.

After I submit all of them, I resume, so all the tasks can start to execute.

i put the function starpu_task_wait_for_all(); to wait for all the tasks to finish.

Now comes the tricky part:

I already know that Context 2 is going to finish light years faster than Context 1, I would like to move all workers from Context 2 to the Context 1, so the workers on Context 2 can help Context 1 finish faster. Is it possible to do it ? or do I need to wait for the barrier starpu_task_wait_for_all(); ?

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I tried to do this with starpu_sched_ctx_set_inheritor, starpu_sched_ctx_finished_submit() and starpu_sched_ctx_delete().....but I think it doesnt work on the described situation, since I need to wait for the barrier starpu_task_wait_for_all() to one context inherit the workers of another context, am I right? or is there a way how to do it like on the described situation in real time?

Thanks for any help or commentaries!

Best,

Joao