PGI User Forum

[Tuan]

I want to generate random numbers using ACML library. I have a loop to be a kernel, each iteration generate N random numbers. My question is whether DRANDUNIFORM can be used to generate random number directly on the device memory or not? If not, is there a way to do that.

I hope someone can tell me how to avoid copy these random numbers from host to device every iteration of the loop.

Thank you,
Tuan

[mkcolg]

Hi Tuan,

If you're using ACML, then you would need to copy the data to the device. Though, since you're using CUDA Fortran, you should be able to find a CUDA C version (there's one in the CUDA sdk example code) and call it's kernel from your host code.

For an example on how to call Cuda C from Cuda Fortran, please take a look at the example "$PGI/linux86-64/10.1/etc/samples/test_cublasSgemm.F90". This example show how to create the interface block with iso_c_binding to the kernel you're calling.

Hope this helps,
Mat

[Tuan]