{"action":"created","issue":{"url":"https://api.github.com/repos/mesosphere/serenity/issues/89","labels_url":"https://api.github.com/repos/mesosphere/serenity/issues/89/labels{/name}","comments_url":"https://api.github.com/repos/mesosphere/serenity/issues/89/comments","events_url":"https://api.github.com/repos/mesosphere/serenity/issues/89/events","html_url":"https://github.com/mesosphere/serenity/issues/89","id":105357703,"number":89,"title":"Throttling BE tasks (under CPU stress) could be not enough.","user":{"login":"Bplotka","id":6950331,"avatar_url":"https://avatars.githubusercontent.com/u/6950331?v=3","gravatar_id":"","url":"https://api.github.com/users/Bplotka","html_url":"https://github.com/Bplotka","followers_url":"https://api.github.com/users/Bplotka/followers","following_url":"https://api.github.com/users/Bplotka/following{/other_user}","gists_url":"https://api.github.com/users/Bplotka/gists{/gist_id}","starred_url":"https://api.github.com/users/Bplotka/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/Bplotka/subscriptions","organizations_url":"https://api.github.com/users/Bplotka/orgs","repos_url":"https://api.github.com/users/Bplotka/repos","events_url":"https://api.github.com/users/Bplotka/events{/privacy}","received_events_url":"https://api.github.com/users/Bplotka/received_events","type":"User","site_admin":false},"labels":[{"url":"https://api.github.com/repos/mesosphere/serenity/labels/discussion","name":"discussion","color":"5319e7"},{"url":"https://api.github.com/repos/mesosphere/serenity/labels/mesos%20upstream","name":"mesos upstream","color":"3399FF"},{"url":"https://api.github.com/repos/mesosphere/serenity/labels/status/open","name":"status/open","color":"0052cc"}],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":0,"created_at":"2015-09-08T11:24:38Z","updated_at":"2015-09-08T13:45:34Z","closed_at":null,"body":"Our throttled BE tasks can still interfere with LC PR task because they still can be scheduled for a short while by Linux Scheduler. They could create ctx switching and interfere with PR. (There could be no IPC drop, however interference appears)\r\nMitigations:\r\n- We should try to find a way to remove BE tasks when too many of them are on our node (even throttled)\r\n- Move BE jobs into Freezer cgroup?\r\n\r\nWe should make some experiments on how does BE task cntx switches affects LC task on different levels of PR utilization and amount of CPU-stress BE tasks."},"comment":{"url":"https://api.github.com/repos/mesosphere/serenity/issues/comments/138563839","html_url":"https://github.com/mesosphere/serenity/issues/89#issuecomment-138563839","issue_url":"https://api.github.com/repos/mesosphere/serenity/issues/89","id":138563839,"user":{"login":"skonefal","id":10141081,"avatar_url":"https://avatars.githubusercontent.com/u/10141081?v=3","gravatar_id":"","url":"https://api.github.com/users/skonefal","html_url":"https://github.com/skonefal","followers_url":"https://api.github.com/users/skonefal/followers","following_url":"https://api.github.com/users/skonefal/following{/other_user}","gists_url":"https://api.github.com/users/skonefal/gists{/gist_id}","starred_url":"https://api.github.com/users/skonefal/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/skonefal/subscriptions","organizations_url":"https://api.github.com/users/skonefal/orgs","repos_url":"https://api.github.com/users/skonefal/repos","events_url":"https://api.github.com/users/skonefal/events{/privacy}","received_events_url":"https://api.github.com/users/skonefal/received_events","type":"User","site_admin":false},"created_at":"2015-09-08T13:45:34Z","updated_at":"2015-09-08T13:45:34Z","body":"This should be solved @ Mesos level.\r\n\r\nVinod has raised this issue on Community sync on Sept 3rd, 2015\r\nhttps://docs.google.com/document/d/153CUCj5LOJCFAVpdDZC7COJDwKh9RDjxaTA0S7lzwDA/edit "}}