estimating workspace size

[Peter Steinbach]

Hi, how can I estimate how much space a plan will require on device. I found GetWorkSizes, but I am not sure what global and local refer to: https://bitbucket.org/multicoreware/hcfft/src/094e4e8a4c01b3563388241aa81f05a955c54b06/lib/include/hcfftlib.h?at=master&fileviewer=file-view-default#hcfftlib.h-596

do I have to add the global and local worksizes? in what units are they given?

[Neelakandan Ramachandran]

global and local worksizes define the kernel configuration settings viz the number of thread blocks and number of threads within a block respectively

I don't quite understand what you refer here as space of a plan ? Could you elaborate ?

[Peter Steinbach]

sure, I basically want to know how much memory a plan might require on device. In cufft speak, a workspace is the amount of device memory that will be used. I am totally not sure, if using GetWorkSizes is the member function to infer this (from what you say, it's not the right tool). I'd appreciate your help here.