I am trying various tests using ffts on a 3gb hd 7950. The speeds I seem to get are impressive - if the use
of gettimeofday() can be relied upon to measure elapsed times.
When I try to make 100000 x 1536 double precision in-place r2c transforms, my pc seizes up.
The half case (50000 x 1536) is fine. I am running this of a 8gb pc with ubuntu 14.04 and using
the gui with 4 windows open. Before I post any code etc, is there anything I should be checking