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Fix multi-node#70

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tsirif wants to merge 19 commits intomila-iqia:mastermila-iqia/platoon:masterfrom tsirif:fix/multi-nodetsirif/platoon:fix/multi-nodeCopy head branch name to clipboard

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Commits on Feb 21, 2017

• Remove explicit MPI init and final

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  73b63f6

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• Make log directories for workers per host

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Commits on Feb 22, 2017

• Use MPI spawn multiple in a COMM_SELF to launch workers in multi-node

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Commits on Feb 25, 2017

• Fix platoon-related bug (#1)

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• Pass only workers count per controller in launch_mpi_workers

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• Print args when failing to spawn mpi workers

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• Change rc.initialize to False in util.py

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• Split MPI conversion files from util.py

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• Maybe keep worker.Worker inside __init__ imports

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• Merge branch 'test_zmq_error' into fix/multi-node

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• Move launch_mpi_workers to mpi_util

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• Impl launch_mpi_workers with Spawn, pass all env vars

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• Make Controller a singleton

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Commits on Feb 26, 2017

• Make a worker instance upon importing Worker module

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• Multi-node compat: Make worker request its device to controller

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• Attempt to fix multi-node, methods to finilize well

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Commits on Mar 6, 2017

• Fix tests in test_util.py

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• Create numpy array from shared buff in controller

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• Change send buffer in mpi4py Allreduce to IN_PLACE

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