{"action":"created","issue":{"url":"https://api.github.com/repos/CNugteren/CLBlast/issues/83","repository_url":"https://api.github.com/repos/CNugteren/CLBlast","labels_url":"https://api.github.com/repos/CNugteren/CLBlast/issues/83/labels{/name}","comments_url":"https://api.github.com/repos/CNugteren/CLBlast/issues/83/comments","events_url":"https://api.github.com/repos/CNugteren/CLBlast/issues/83/events","html_url":"https://github.com/CNugteren/CLBlast/issues/83","id":166303681,"number":83,"title":"Performance gemv vs gemm","user":{"login":"JanAbbing","id":20371712,"avatar_url":"https://avatars.githubusercontent.com/u/20371712?v=3","gravatar_id":"","url":"https://api.github.com/users/JanAbbing","html_url":"https://github.com/JanAbbing","followers_url":"https://api.github.com/users/JanAbbing/followers","following_url":"https://api.github.com/users/JanAbbing/following{/other_user}","gists_url":"https://api.github.com/users/JanAbbing/gists{/gist_id}","starred_url":"https://api.github.com/users/JanAbbing/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/JanAbbing/subscriptions","organizations_url":"https://api.github.com/users/JanAbbing/orgs","repos_url":"https://api.github.com/users/JanAbbing/repos","events_url":"https://api.github.com/users/JanAbbing/events{/privacy}","received_events_url":"https://api.github.com/users/JanAbbing/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":5,"created_at":"2016-07-19T10:59:44Z","updated_at":"2016-07-26T18:51:03Z","closed_at":null,"body":"Hello,\r\n\r\nI encountered a weird runtime difference between the gemv and the gemm routine. \r\nWhen I run both with the Input: M=4096, N=1, K=4096 on my GTX480 the runtime of the gemm routine is 3.04ms and the runtime of the gemv routine is 5.51ms. I would have expected that gemv would be faster than the gemm routine because it is made for such an input. Could it be that gemv isn't yet optimized for a GTX480 or is it normal that it is slower? The cuBLASSgemm is slower than cuBLASSgemv (almost 2 times faster).\r\n\r\nI call the gemv routine like this:\r\n./clblast_client_xgemv -m 4096 -n 4096 -alpha 1 -beta 0 -warm_up true -runs 100\r\n\r\nGreetings,\r\nJan"},"comment":{"url":"https://api.github.com/repos/CNugteren/CLBlast/issues/comments/235367273","html_url":"https://github.com/CNugteren/CLBlast/issues/83#issuecomment-235367273","issue_url":"https://api.github.com/repos/CNugteren/CLBlast/issues/83","id":235367273,"user":{"login":"JanAbbing","id":20371712,"avatar_url":"https://avatars.githubusercontent.com/u/20371712?v=3","gravatar_id":"","url":"https://api.github.com/users/JanAbbing","html_url":"https://github.com/JanAbbing","followers_url":"https://api.github.com/users/JanAbbing/followers","following_url":"https://api.github.com/users/JanAbbing/following{/other_user}","gists_url":"https://api.github.com/users/JanAbbing/gists{/gist_id}","starred_url":"https://api.github.com/users/JanAbbing/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/JanAbbing/subscriptions","organizations_url":"https://api.github.com/users/JanAbbing/orgs","repos_url":"https://api.github.com/users/JanAbbing/repos","events_url":"https://api.github.com/users/JanAbbing/events{/privacy}","received_events_url":"https://api.github.com/users/JanAbbing/received_events","type":"User","site_admin":false},"created_at":"2016-07-26T18:51:03Z","updated_at":"2016-07-26T18:51:03Z","body":"It improved quite a bit to 2,17 ms. \r\n\r\nThanks for the help!"}}
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