{"action":"created","issue":{"url":"https://api.github.com/repos/ucb-bar/uncore/issues/23","repository_url":"https://api.github.com/repos/ucb-bar/uncore","labels_url":"https://api.github.com/repos/ucb-bar/uncore/issues/23/labels{/name}","comments_url":"https://api.github.com/repos/ucb-bar/uncore/issues/23/comments","events_url":"https://api.github.com/repos/ucb-bar/uncore/issues/23/events","html_url":"https://github.com/ucb-bar/uncore/issues/23","id":140066953,"number":23,"title":"L2HellaCacheBank AcquireTracker fails to handle voluntary Release","user":{"login":"kenmcmil","id":8010069,"avatar_url":"https://avatars.githubusercontent.com/u/8010069?v=3","gravatar_id":"","url":"https://api.github.com/users/kenmcmil","html_url":"https://github.com/kenmcmil","followers_url":"https://api.github.com/users/kenmcmil/followers","following_url":"https://api.github.com/users/kenmcmil/following{/other_user}","gists_url":"https://api.github.com/users/kenmcmil/gists{/gist_id}","starred_url":"https://api.github.com/users/kenmcmil/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/kenmcmil/subscriptions","organizations_url":"https://api.github.com/users/kenmcmil/orgs","repos_url":"https://api.github.com/users/kenmcmil/repos","events_url":"https://api.github.com/users/kenmcmil/events{/privacy}","received_events_url":"https://api.github.com/users/kenmcmil/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":1,"created_at":"2016-03-11T02:24:31Z","updated_at":"2016-03-11T20:25:15Z","closed_at":null,"body":"[dump5.txt](https://github.com/ucb-bar/uncore/files/168363/dump5.txt)\r\n\r\nIn the above vcd, we have:\r\n\r\n104ps:  First beat of a voluntary release is received by Acquire tracker zero before the acquire is finished.\r\n\r\n116ps: Acquire tracker terminates without waiting for second beat of write-back.\r\n\r\n118ps: Second beat of write-back arrives and is handled as first beat by ReleaseTracker.\r\n\r\n140ps: First beat of following unrelated write-back is handled by ReleaseTracker as second beat, and so on."},"comment":{"url":"https://api.github.com/repos/ucb-bar/uncore/issues/comments/195535034","html_url":"https://github.com/ucb-bar/uncore/issues/23#issuecomment-195535034","issue_url":"https://api.github.com/repos/ucb-bar/uncore/issues/23","id":195535034,"user":{"login":"kenmcmil","id":8010069,"avatar_url":"https://avatars.githubusercontent.com/u/8010069?v=3","gravatar_id":"","url":"https://api.github.com/users/kenmcmil","html_url":"https://github.com/kenmcmil","followers_url":"https://api.github.com/users/kenmcmil/followers","following_url":"https://api.github.com/users/kenmcmil/following{/other_user}","gists_url":"https://api.github.com/users/kenmcmil/gists{/gist_id}","starred_url":"https://api.github.com/users/kenmcmil/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/kenmcmil/subscriptions","organizations_url":"https://api.github.com/users/kenmcmil/orgs","repos_url":"https://api.github.com/users/kenmcmil/repos","events_url":"https://api.github.com/users/kenmcmil/events{/privacy}","received_events_url":"https://api.github.com/users/kenmcmil/received_events","type":"User","site_admin":false},"created_at":"2016-03-11T20:25:15Z","updated_at":"2016-03-11T20:25:15Z","body":"The problem seems to be that at 106ps, pending_vol_ignt is being set, which then causes the second beat of the vol release to be blocked at 108ps and a vol Grant to be erroneously issued at 112ps. Problem is at cache.scala:660 where pending_vol_ignt is set by a single release beat. The tracker needs to count vol release beats, and to block exit from busy state while vol release beats are pending."}}