{"action":"created","issue":{"url":"https://api.github.com/repos/tensorflow/tensorflow/issues/583","repository_url":"https://api.github.com/repos/tensorflow/tensorflow","labels_url":"https://api.github.com/repos/tensorflow/tensorflow/issues/583/labels{/name}","comments_url":"https://api.github.com/repos/tensorflow/tensorflow/issues/583/comments","events_url":"https://api.github.com/repos/tensorflow/tensorflow/issues/583/events","html_url":"https://github.com/tensorflow/tensorflow/issues/583","id":123342140,"number":583,"title":"Multiple CPU usage ineffective","user":{"login":"alantus","id":16088205,"avatar_url":"https://avatars.githubusercontent.com/u/16088205?v=3","gravatar_id":"","url":"https://api.github.com/users/alantus","html_url":"https://github.com/alantus","followers_url":"https://api.github.com/users/alantus/followers","following_url":"https://api.github.com/users/alantus/following{/other_user}","gists_url":"https://api.github.com/users/alantus/gists{/gist_id}","starred_url":"https://api.github.com/users/alantus/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/alantus/subscriptions","organizations_url":"https://api.github.com/users/alantus/orgs","repos_url":"https://api.github.com/users/alantus/repos","events_url":"https://api.github.com/users/alantus/events{/privacy}","received_events_url":"https://api.github.com/users/alantus/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":{"login":"benoitsteiner","id":6969686,"avatar_url":"https://avatars.githubusercontent.com/u/6969686?v=3","gravatar_id":"","url":"https://api.github.com/users/benoitsteiner","html_url":"https://github.com/benoitsteiner","followers_url":"https://api.github.com/users/benoitsteiner/followers","following_url":"https://api.github.com/users/benoitsteiner/following{/other_user}","gists_url":"https://api.github.com/users/benoitsteiner/gists{/gist_id}","starred_url":"https://api.github.com/users/benoitsteiner/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/benoitsteiner/subscriptions","organizations_url":"https://api.github.com/users/benoitsteiner/orgs","repos_url":"https://api.github.com/users/benoitsteiner/repos","events_url":"https://api.github.com/users/benoitsteiner/events{/privacy}","received_events_url":"https://api.github.com/users/benoitsteiner/received_events","type":"User","site_admin":false},"milestone":null,"comments":23,"created_at":"2015-12-21T19:26:35Z","updated_at":"2016-05-18T18:57:48Z","closed_at":null,"body":"I'm running tensorflow on a machine with 64 CPUs and no GPUs. I noticed that although tf detects the number of CPU's correctly (\r\nI tensorflow/core/common_runtime/local_device.cc:40] Local device intra op parallelism threads: 64\r\nI tensorflow/core/common_runtime/direct_session.cc:58] Direct session inter op parallelism threads: 64\r\n), the total CPU usage is less than 16 most of the time. It increases to 20-30 occasionally but for a very short period of time. And even that is much lower than 64. "},"comment":{"url":"https://api.github.com/repos/tensorflow/tensorflow/issues/comments/220124684","html_url":"https://github.com/tensorflow/tensorflow/issues/583#issuecomment-220124684","issue_url":"https://api.github.com/repos/tensorflow/tensorflow/issues/583","id":220124684,"user":{"login":"benoitsteiner","id":6969686,"avatar_url":"https://avatars.githubusercontent.com/u/6969686?v=3","gravatar_id":"","url":"https://api.github.com/users/benoitsteiner","html_url":"https://github.com/benoitsteiner","followers_url":"https://api.github.com/users/benoitsteiner/followers","following_url":"https://api.github.com/users/benoitsteiner/following{/other_user}","gists_url":"https://api.github.com/users/benoitsteiner/gists{/gist_id}","starred_url":"https://api.github.com/users/benoitsteiner/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/benoitsteiner/subscriptions","organizations_url":"https://api.github.com/users/benoitsteiner/orgs","repos_url":"https://api.github.com/users/benoitsteiner/repos","events_url":"https://api.github.com/users/benoitsteiner/events{/privacy}","received_events_url":"https://api.github.com/users/benoitsteiner/received_events","type":"User","site_admin":false},"created_at":"2016-05-18T18:57:48Z","updated_at":"2016-05-18T18:57:48Z","body":"@songgc https://github.com/tensorflow/tensorflow/commit/ab02c5ab2f1f10bc9e51f02f5125abed449cae87 combined with a few other changes to make sure all the TensorFlow operations are multithreaded resulted in a 1.5x to 3x improvement on most benchmarks. Is that what you're seeing?"}}