{"action":"created","issue":{"url":"https://api.github.com/repos/dmlc/mxnet/issues/5119","repository_url":"https://api.github.com/repos/dmlc/mxnet","labels_url":"https://api.github.com/repos/dmlc/mxnet/issues/5119/labels{/name}","comments_url":"https://api.github.com/repos/dmlc/mxnet/issues/5119/comments","events_url":"https://api.github.com/repos/dmlc/mxnet/issues/5119/events","html_url":"https://github.com/dmlc/mxnet/issues/5119","id":209692650,"number":5119,"title":"subgraph in mxnet","user":{"login":"feiyulv","id":18651286,"avatar_url":"https://avatars.githubusercontent.com/u/18651286?v=3","gravatar_id":"","url":"https://api.github.com/users/feiyulv","html_url":"https://github.com/feiyulv","followers_url":"https://api.github.com/users/feiyulv/followers","following_url":"https://api.github.com/users/feiyulv/following{/other_user}","gists_url":"https://api.github.com/users/feiyulv/gists{/gist_id}","starred_url":"https://api.github.com/users/feiyulv/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/feiyulv/subscriptions","organizations_url":"https://api.github.com/users/feiyulv/orgs","repos_url":"https://api.github.com/users/feiyulv/repos","events_url":"https://api.github.com/users/feiyulv/events{/privacy}","received_events_url":"https://api.github.com/users/feiyulv/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":0,"created_at":"2017-02-23T08:16:35Z","updated_at":"2017-02-23T18:40:57Z","closed_at":null,"body":"I need to construct a symbol with several subgraphs,  some of them only need to do forward computation.  For the consideration of gpu memory cost, is there any way to forbid a subgraph generating the gradient memory for backward? Creating multiple executors for each graph, and only do forward pass will be a solution but not very convenient. @piiswrong "},"comment":{"url":"https://api.github.com/repos/dmlc/mxnet/issues/comments/282081360","html_url":"https://github.com/dmlc/mxnet/issues/5119#issuecomment-282081360","issue_url":"https://api.github.com/repos/dmlc/mxnet/issues/5119","id":282081360,"user":{"login":"piiswrong","id":568948,"avatar_url":"https://avatars.githubusercontent.com/u/568948?v=3","gravatar_id":"","url":"https://api.github.com/users/piiswrong","html_url":"https://github.com/piiswrong","followers_url":"https://api.github.com/users/piiswrong/followers","following_url":"https://api.github.com/users/piiswrong/following{/other_user}","gists_url":"https://api.github.com/users/piiswrong/gists{/gist_id}","starred_url":"https://api.github.com/users/piiswrong/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/piiswrong/subscriptions","organizations_url":"https://api.github.com/users/piiswrong/orgs","repos_url":"https://api.github.com/users/piiswrong/repos","events_url":"https://api.github.com/users/piiswrong/events{/privacy}","received_events_url":"https://api.github.com/users/piiswrong/received_events","type":"User","site_admin":false},"created_at":"2017-02-23T18:40:57Z","updated_at":"2017-02-23T18:40:57Z","body":"if you don't bind gradient for arguments paths leading to them own't be computed.\r\nyou can do this with fixed_param_names for module"}}
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