On Fri, 20 Jan 2012 09:28:05 -0800 (PST), ggeo <[email protected]> wrote: > Hello , i am a bit confused about measuring time,so i need a little help. > > I have a code like : > > .... > Rs_gpu=gpuarray.to_gpu(np.random.rand(numPointsRs*3).astype(np.float32)) > Rp_gpu=gpuarray.to_gpu(np.random.rand(3).astype(np.float32)) > .... > start = drv.Event() > end = drv.Event() > > mod =SourceModule(""" > __global__ void compute(float *Rs_mat, ...., float *Rp,.) > """) > > #call the function(kernel) > func = mod.get_function("compute") > > start.record() # start timing > > func(Rs_gpu,..Rp_gpu...) > > end.record() # end timing > > # calculate the run length > end.synchronize() > secs = start.time_till(end)*1e-3 > > #----- get data back from GPU----- > Rs=Rs_gpu.get() > Rp=Rp_gpu.get() > > > print "%s, %fsec, %s" % ('Time for Rs = ',secs,str(Rs)) > print "%s, %fsec, %s" % ('Time for Rp = ',secs,str(Rp)) //here i am > computing the same thing! > > > My questions are: > > 1) Is this right correct for measuring the gpu time?
Yes. > 2) How can i distinguish the results for Rs and for Rp (if it can be > done) Not easily, unfortunately. HTH, Andreas
pgpqRvIwSVEWL.pgp
Description: PGP signature
_______________________________________________ PyCUDA mailing list [email protected] http://lists.tiker.net/listinfo/pycuda
