CPU versus GPU

Author	Message
Weattherx6 Send message Joined: 22 Dec 10 Posts: 1 Credit: 33,454,138 RAC: 0	Message 45417 - Posted: 7 Jan 2011, 2:57:00 UTC I have AMD X6 and a NVIDA GPU. Only Milkway running, it only uses the GPU and not the CPU...well it states, "Running 0.05 CPUs + 1.00 NVIDIA GPU". Why not run all 6 cpu and the gpu? THE GPU tasks are 17 min each, and there is a pile awaiting. As one finshes it sends it off and gets more. Is this an issue over number of tasks?? ID: 45417 · Rating: 0 · rate: / Reply Quote

arkayn Send message Joined: 14 Feb 09 Posts: 999 Credit: 74,932,619 RAC: 0	Message 45420 - Posted: 7 Jan 2011, 5:42:53 UTC While the GPU takes 17 minutes, the CPU will take about 4-10 hours to do the same task. ID: 45420 · Rating: 0 · rate: / Reply Quote

Werkstatt Send message Joined: 19 Feb 08 Posts: 350 Credit: 141,284,369 RAC: 0	Message 45421 - Posted: 7 Jan 2011, 7:50:55 UTC - in response to Message 45417. Why not run all 6 cpu and the gpu? If you like your cpu's crunching MW go to your personal settings and check 'Use CPU'. Since the n-body tasks are not available for GPU's, it might be of interest to run only these on CPU's. But therefore you need an app_info.xml. ID: 45421 · Rating: 0 · rate: / Reply Quote

Chris Send message Joined: 3 Oct 10 Posts: 42 Credit: 320,242 RAC: 0	Message 46906 - Posted: 2 Apr 2011, 2:24:16 UTC - in response to Message 45421. Mine seems to switch off. It will run the GPU for a while. Then do an N_body for CPU. Then sometimes a GPU and CPU tasks concurrently. But sometimes it does indeed leave the CPU not doing anything apparently. Not sure why. It could be working on something since its the only one of the two that does N_body. ID: 46906 · Rating: 0 · rate: / Reply Quote