{"action":"created","issue":{"url":"https://api.github.com/repos/uber/horovod/issues/570","repository_url":"https://api.github.com/repos/uber/horovod","labels_url":"https://api.github.com/repos/uber/horovod/issues/570/labels{/name}","comments_url":"https://api.github.com/repos/uber/horovod/issues/570/comments","events_url":"https://api.github.com/repos/uber/horovod/issues/570/events","html_url":"https://github.com/uber/horovod/pull/570","id":371332100,"node_id":"MDExOlB1bGxSZXF1ZXN0MjIzODAzNjA0","number":570,"title":"Added option to treat sparse gradients as dense tensors","user":{"login":"alsrgv","id":16640218,"node_id":"MDQ6VXNlcjE2NjQwMjE4","avatar_url":"https://avatars2.githubusercontent.com/u/16640218?v=4","gravatar_id":"","url":"https://api.github.com/users/alsrgv","html_url":"https://github.com/alsrgv","followers_url":"https://api.github.com/users/alsrgv/followers","following_url":"https://api.github.com/users/alsrgv/following{/other_user}","gists_url":"https://api.github.com/users/alsrgv/gists{/gist_id}","starred_url":"https://api.github.com/users/alsrgv/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/alsrgv/subscriptions","organizations_url":"https://api.github.com/users/alsrgv/orgs","repos_url":"https://api.github.com/users/alsrgv/repos","events_url":"https://api.github.com/users/alsrgv/events{/privacy}","received_events_url":"https://api.github.com/users/alsrgv/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":{"login":"alsrgv","id":16640218,"node_id":"MDQ6VXNlcjE2NjQwMjE4","avatar_url":"https://avatars2.githubusercontent.com/u/16640218?v=4","gravatar_id":"","url":"https://api.github.com/users/alsrgv","html_url":"https://github.com/alsrgv","followers_url":"https://api.github.com/users/alsrgv/followers","following_url":"https://api.github.com/users/alsrgv/following{/other_user}","gists_url":"https://api.github.com/users/alsrgv/gists{/gist_id}","starred_url":"https://api.github.com/users/alsrgv/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/alsrgv/subscriptions","organizations_url":"https://api.github.com/users/alsrgv/orgs","repos_url":"https://api.github.com/users/alsrgv/repos","events_url":"https://api.github.com/users/alsrgv/events{/privacy}","received_events_url":"https://api.github.com/users/alsrgv/received_events","type":"User","site_admin":false},"assignees":[{"login":"alsrgv","id":16640218,"node_id":"MDQ6VXNlcjE2NjQwMjE4","avatar_url":"https://avatars2.githubusercontent.com/u/16640218?v=4","gravatar_id":"","url":"https://api.github.com/users/alsrgv","html_url":"https://github.com/alsrgv","followers_url":"https://api.github.com/users/alsrgv/followers","following_url":"https://api.github.com/users/alsrgv/following{/other_user}","gists_url":"https://api.github.com/users/alsrgv/gists{/gist_id}","starred_url":"https://api.github.com/users/alsrgv/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/alsrgv/subscriptions","organizations_url":"https://api.github.com/users/alsrgv/orgs","repos_url":"https://api.github.com/users/alsrgv/repos","events_url":"https://api.github.com/users/alsrgv/events{/privacy}","received_events_url":"https://api.github.com/users/alsrgv/received_events","type":"User","site_admin":false}],"milestone":null,"comments":0,"created_at":"2018-10-18T02:03:26Z","updated_at":"2018-10-18T02:05:22Z","closed_at":null,"author_association":"COLLABORATOR","pull_request":{"url":"https://api.github.com/repos/uber/horovod/pulls/570","html_url":"https://github.com/uber/horovod/pull/570","diff_url":"https://github.com/uber/horovod/pull/570.diff","patch_url":"https://github.com/uber/horovod/pull/570.patch"},"body":"As shown in #554, #566, #430, and potentially other issues, sometimes sparse gradients are not so sparse.  This can cause bad performance and OOMs.\r\n\r\nThis change introduces option `hvd.DistributedOptimizer(..., sparse_as_dense=False)` that, if set to true, will force all sparse gradients to be densified."},"comment":{"url":"https://api.github.com/repos/uber/horovod/issues/comments/430849940","html_url":"https://github.com/uber/horovod/pull/570#issuecomment-430849940","issue_url":"https://api.github.com/repos/uber/horovod/issues/570","id":430849940,"node_id":"MDEyOklzc3VlQ29tbWVudDQzMDg0OTk0MA==","user":{"login":"alsrgv","id":16640218,"node_id":"MDQ6VXNlcjE2NjQwMjE4","avatar_url":"https://avatars2.githubusercontent.com/u/16640218?v=4","gravatar_id":"","url":"https://api.github.com/users/alsrgv","html_url":"https://github.com/alsrgv","followers_url":"https://api.github.com/users/alsrgv/followers","following_url":"https://api.github.com/users/alsrgv/following{/other_user}","gists_url":"https://api.github.com/users/alsrgv/gists{/gist_id}","starred_url":"https://api.github.com/users/alsrgv/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/alsrgv/subscriptions","organizations_url":"https://api.github.com/users/alsrgv/orgs","repos_url":"https://api.github.com/users/alsrgv/repos","events_url":"https://api.github.com/users/alsrgv/events{/privacy}","received_events_url":"https://api.github.com/users/alsrgv/received_events","type":"User","site_admin":false},"created_at":"2018-10-18T02:05:22Z","updated_at":"2018-10-18T02:05:22Z","author_association":"COLLABORATOR","body":"Note to self: after usability is confirmed, add tests."}}
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