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?
2) How can i distinguish the results for Rs and for Rp (if it can be done)
Thanks!
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