http://www.k-wave.org/forum/topic/gpu-performence Support for the k-Wave MATLAB toolbox en-US Tue, 12 May 2026 22:00:12 +0000 http://bbpress.org/?v=1.0.2 q http://www.k-wave.org/forum/search.php http://www.k-wave.org/forum/topic/gpu-performence#post-78 Mon, 25 Oct 2010 14:24:28 +0000 Bradley Treeby 78@http://www.k-wave.org/forum/ <p>Hi Tomasz,</p> <p>The speed-up you observe when running k-Wave on the GPU will depend on two things:</p> <p><strong>(1) The specifications of the GPU.</strong> Notebook GPUs in particular tend to have only a small number of cores (48 in your case) with a relatively low clock speed and often only modest amounts of memory. This will reduce the achievable performance. </p> <p><strong>(2) The size of the simulation grid.</strong> Because of the additional computational overhead associated with setting up the computation on the GPU, you will likely only see performance increases when using larger grid sizes.</p> <p>For some published benchmarking comparisons, see Fig. 7 in <a href="http://www.k-wave.org/papers/2010-Treeby-JBO.pdf">k-Wave: MATLAB toolbox for the simulation and reconstruction of photoacoustic wave-fields</a>. In this example, using the GPU only becomes faster when the grid size reaches 2^18 elements. You could try increasing the size of the grid in the example you are running to see if you observe any speed-up as the grid size increases.</p> <p>We are currently working on collating performance comparisons using a much bigger range of PCs and GPUs. I haven't had much experience with notebook GPUs so I would definitely be interested in hearing how you get on.</p> <p>Brad. </p> http://www.k-wave.org/forum/topic/gpu-performence#post-77 Mon, 25 Oct 2010 13:13:29 +0000 Tomluk 77@http://www.k-wave.org/forum/ <p>Hi.<br /> Did you do some tests on how much faster the simulations should work?<br /> I used one of yours example (example_us_snells_law.m) for tests. When using GPUmat, calculations were much slower. It took 19 seconds for normal calculations, and 33 sec. using GPUmat. So my question is: is it my computer (specification below) or maybe something wrong with the script or is it a GPUmat problem?<br /> I am using notebook with Windows 7 32bit, Intel I5-M430 2.27Ghz, nvidia 330M 1GB, 3GB RAM, Matlab 2010a.<br /> Regards<br /> Tomasz </p>