Selecting from Multiple GPUS

Accelerated Computing HPC Compilers Legacy PGI Compilers
1

I have multiple GPU’s and I don’t understand how I can tell the compiler which GPU to use when using OPENACC.

2

Compiler is not responsible for selecting GPU.

By default the first GPU is selected.
You can select required GPU by hands:
acc_set_device_num(GPU_number)
or
export ACC_DEVICE_NUM=GPU_number

3

How do I know which one is which. I have a Tesla 2075 and Quadro 5000, and would like to use the Tesla for computations. Is there a way to set which one is the first one and see details…

4

Run the command “pgaccelinfo” to see which is which and the detail of each.

  • Mat