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https://github.com/zebrajr/pytorch.git
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3732a0044c
Summary: TSIA Differential Revision: D4386553 fbshipit-source-id: 2c7196171be7d0af90b46b75f68c949ee3980c2e
49 lines
1.3 KiB
C++
49 lines
1.3 KiB
C++
#include <pybind11/pybind11.h>
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#include <pybind11/stl.h>
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#include "caffe2/mpi/mpi_common.h"
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namespace caffe2 {
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namespace py = pybind11;
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PYBIND11_PLUGIN(mpi) {
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py::module m("mpi_utils", "MPI helper functions");
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m.def(
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"SetupPeers",
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&MPISetupPeers,
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py::arg("replicas"),
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py::arg("role"),
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py::arg("job_path"));
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m.def("CommSize", [] {
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auto comm = GlobalMPIComm();
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return MPICommSize(comm);
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});
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m.def("CommRank", [] {
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auto comm = GlobalMPIComm();
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return MPICommRank(comm);
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});
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m.def("Finalize", [] {
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// NOTE(pietern): Doesn't seem to work when calling it
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// from Python. It ends up calling pthread_join on a
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// thread that doesn't exit. For now, running mpirun
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// with `-quiet` and skipping the finalize call.
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MPI_Finalize();
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});
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m.def("Broadcast", [](py::bytes in) -> py::bytes {
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std::string str = in;
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auto comm = GlobalMPIComm();
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auto length = str.length();
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MPI_Bcast(&length, sizeof(length), MPI_CHAR, 0, comm);
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auto ptr = caffe2::make_unique<char[]>(length);
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if (MPICommRank(comm) == 0) {
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memcpy(ptr.get(), str.data(), str.length());
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}
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MPI_Bcast(ptr.get(), length, MPI_CHAR, 0, comm);
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return std::string(ptr.get(), length);
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});
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return m.ptr();
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}
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} // namespace caffe2
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