[Starpu-devel] StarPU CUDA out of memory

[Usman Dastgeer <usman.dastgeer@liu.se>]

Hello,

I am getting "out of memory" error with CUDA fermi GPU when using StarPU.

I am executing a "call" 15 times in a loop and I do it in the following way:

for(i=1...15)
{
    starpu_data_register(...) calls
    function_call(...)
    starpu-data_unregister() calls
}


When executing call directly with CUDA (i.e. without starpu) the call 
works fine and the memory consumption is at max 1085MB for my problem 
size while the available GPU memory is around 2687MB (checked using 
nvidia-smi).

With StarPU it seems that CUDA memory is not actually freed on 
"data_unregister" and that creates problem as memory consumption reaches 
2109MB already on 2nd execution and after that all remaining 13 
executions fail with "out of memory" error.

What do you think?

--
regards,
Usman.