{"action":"created","issue":{"url":"https://api.github.com/repos/pandegroup/openmm/issues/969","labels_url":"https://api.github.com/repos/pandegroup/openmm/issues/969/labels{/name}","comments_url":"https://api.github.com/repos/pandegroup/openmm/issues/969/comments","events_url":"https://api.github.com/repos/pandegroup/openmm/issues/969/events","html_url":"https://github.com/pandegroup/openmm/issues/969","id":88808253,"number":969,"title":"6.3 Beta performance regression on windows?","user":{"login":"mpharrigan","id":4967059,"avatar_url":"https://avatars.githubusercontent.com/u/4967059?v=3","gravatar_id":"","url":"https://api.github.com/users/mpharrigan","html_url":"https://github.com/mpharrigan","followers_url":"https://api.github.com/users/mpharrigan/followers","following_url":"https://api.github.com/users/mpharrigan/following{/other_user}","gists_url":"https://api.github.com/users/mpharrigan/gists{/gist_id}","starred_url":"https://api.github.com/users/mpharrigan/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/mpharrigan/subscriptions","organizations_url":"https://api.github.com/users/mpharrigan/orgs","repos_url":"https://api.github.com/users/mpharrigan/repos","events_url":"https://api.github.com/users/mpharrigan/events{/privacy}","received_events_url":"https://api.github.com/users/mpharrigan/received_events","type":"User","site_admin":false},"labels":[{"url":"https://api.github.com/repos/pandegroup/openmm/labels/bug","name":"bug","color":"fc2929"}],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":10,"created_at":"2015-06-16T18:50:22Z","updated_at":"2015-06-26T23:40:05Z","closed_at":null,"body":"I built openmm 6.2 and 6.3-beta1 on windows (x64, release, msvc2013, cuda 6.5) and built fahbench (https://github.com/pandegroup/fahbench) against each of them. This runs dhfr for a couple thousand steps and reports performance.\r\n\r\nThese are my numbers on a gtx 570 on the opencl platform\r\n\r\nprecision | 6.2 | 6.3\r\n-----------|-----|------\r\nsingle | 23.4 | 2.0\r\ndouble | 7.18 | error\r\n"},"comment":{"url":"https://api.github.com/repos/pandegroup/openmm/issues/comments/115918944","html_url":"https://github.com/pandegroup/openmm/issues/969#issuecomment-115918944","issue_url":"https://api.github.com/repos/pandegroup/openmm/issues/969","id":115918944,"user":{"login":"peastman","id":4379786,"avatar_url":"https://avatars.githubusercontent.com/u/4379786?v=3","gravatar_id":"","url":"https://api.github.com/users/peastman","html_url":"https://github.com/peastman","followers_url":"https://api.github.com/users/peastman/followers","following_url":"https://api.github.com/users/peastman/following{/other_user}","gists_url":"https://api.github.com/users/peastman/gists{/gist_id}","starred_url":"https://api.github.com/users/peastman/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/peastman/subscriptions","organizations_url":"https://api.github.com/users/peastman/orgs","repos_url":"https://api.github.com/users/peastman/repos","events_url":"https://api.github.com/users/peastman/events{/privacy}","received_events_url":"https://api.github.com/users/peastman/received_events","type":"User","site_admin":false},"created_at":"2015-06-26T23:40:05Z","updated_at":"2015-06-26T23:40:05Z","body":"> Could this be because of the new threading library on windows?\r\n\r\nNo.  The only case where the CUDA and OpenCL platforms use multiple threads is when running on multiple GPUs.\r\n\r\n> Why don't we see the performance regression on @rmcgibbo 's airspeed velocity thing\r\n\r\nDoes he have benchmarks on identical hardware under Linux and Windows?  If so, what do they show?  (I can't check, because the page seems to be broken right now.)\r\n\r\n> Did you try upgrading nvidia drivers (it worked for amd, lol)\r\n\r\nI'm using very recent drivers.\r\n\r\n> I should try upgrading my nvidia drivers\r\n\r\nGo for it!"}}