Improve Speed of Matrix Multiplication by Taking Advantage of GPUArray
1 view (last 30 days)
Show older comments
I actually want to improve the speed of the multiplication of matrix A (m-by-n) and vector x (n-by-1) using GPUArray. Using:
gpuA = gpuArray(A);
gpux = gpuArray(x);
gpuC = gpuA * gpux
C = gather(gpuC)
didn't give me the needed improvement in speed. Any ideas on how I can achieve this?
5 Comments
Edric Ellis
on 19 Jun 2015
How large is A? What GPU device do you have? Also, note that ideally you'd compare timings for only the matrix multiplication portion - you shouldn't time the data transfers too as you shouldn't need to keep transferring data. I would compare:
timeit(@() A * x);
against
gputimeit(@() gpuA * gpux);
On my K20 GPU I see break-even when A is about 1000x1000.
Answers (0)
See Also
Categories
Find more on GPU Computing in MATLAB in Help Center and File Exchange
Products
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!