{"action":"created","issue":{"url":"https://api.github.com/repos/JuliaParallel/MPI.jl/issues/38","labels_url":"https://api.github.com/repos/JuliaParallel/MPI.jl/issues/38/labels{/name}","comments_url":"https://api.github.com/repos/JuliaParallel/MPI.jl/issues/38/comments","events_url":"https://api.github.com/repos/JuliaParallel/MPI.jl/issues/38/events","html_url":"https://github.com/JuliaParallel/MPI.jl/pull/38","id":59391524,"number":38,"title":"WIP/RFC: Using mpirun's MPMD mode of execution....","user":{"login":"amitmurthy","id":117461,"avatar_url":"https://avatars.githubusercontent.com/u/117461?v=3","gravatar_id":"","url":"https://api.github.com/users/amitmurthy","html_url":"https://github.com/amitmurthy","followers_url":"https://api.github.com/users/amitmurthy/followers","following_url":"https://api.github.com/users/amitmurthy/following{/other_user}","gists_url":"https://api.github.com/users/amitmurthy/gists{/gist_id}","starred_url":"https://api.github.com/users/amitmurthy/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/amitmurthy/subscriptions","organizations_url":"https://api.github.com/users/amitmurthy/orgs","repos_url":"https://api.github.com/users/amitmurthy/repos","events_url":"https://api.github.com/users/amitmurthy/events{/privacy}","received_events_url":"https://api.github.com/users/amitmurthy/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":10,"created_at":"2015-03-01T10:50:01Z","updated_at":"2015-03-02T16:46:13Z","closed_at":null,"pull_request":{"url":"https://api.github.com/repos/JuliaParallel/MPI.jl/pulls/38","html_url":"https://github.com/JuliaParallel/MPI.jl/pull/38","diff_url":"https://github.com/JuliaParallel/MPI.jl/pull/38.diff","patch_url":"https://github.com/JuliaParallel/MPI.jl/pull/38.patch"},"body":"....to have all processes part of both the MPI as well as Julia clusters."},"comment":{"url":"https://api.github.com/repos/JuliaParallel/MPI.jl/issues/comments/76748254","html_url":"https://github.com/JuliaParallel/MPI.jl/pull/38#issuecomment-76748254","issue_url":"https://api.github.com/repos/JuliaParallel/MPI.jl/issues/38","id":76748254,"user":{"login":"psanan","id":8024239,"avatar_url":"https://avatars.githubusercontent.com/u/8024239?v=3","gravatar_id":"","url":"https://api.github.com/users/psanan","html_url":"https://github.com/psanan","followers_url":"https://api.github.com/users/psanan/followers","following_url":"https://api.github.com/users/psanan/following{/other_user}","gists_url":"https://api.github.com/users/psanan/gists{/gist_id}","starred_url":"https://api.github.com/users/psanan/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/psanan/subscriptions","organizations_url":"https://api.github.com/users/psanan/orgs","repos_url":"https://api.github.com/users/psanan/repos","events_url":"https://api.github.com/users/psanan/events{/privacy}","received_events_url":"https://api.github.com/users/psanan/received_events","type":"User","site_admin":false},"created_at":"2015-03-02T16:46:13Z","updated_at":"2015-03-02T16:46:13Z","body":"In that example you would need to request 5 cores from the queuing system. On the system we happen to be interested in, which supports hyperthreading, it is possible for these to be virtual cores (two per physical core), so with enough work I think it probably be possible to double up the master process with a worker on one of the physical cores. That would probably be premature optimization in many cases, of course."}}