[singa] branch master updated (75a66b2 -> 695d9da)

[wa...@apache.org]

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wangwei pushed a change to branch master
in repository https://gitbox.apache.org/repos/asf/singa.git.


    from 75a66b2  Merge pull request #545 from joddiy/SINGA-494
     new 69b5750  SINGA-487 Add Sparsification Algorithms
     new e719900  SINGA-487 Update gradient accumulation
     new 8384035  SINGA-487 Update sparsification schemes
     new 695d9da  Merge pull request #566 from chrishkchris/SINGA-487_6

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Summary of changes:
 cmake/Cuda.cmake                                   |   4 +-
 examples/autograd/mnist_cnn.py                     |   8 +-
 ...ist_multiprocess.py => sparsification_mnist.py} |  12 +-
 include/singa/io/communicator.h                    |  63 ++++-
 python/singa/opt.py                                |  90 +++++++
 src/api/dist_communicator.i                        |   4 +
 src/core/tensor/math_kernel.cu                     |  61 +++++
 src/core/tensor/math_kernel.h                      |  18 +-
 src/io/communicator.cc                             | 297 ++++++++++++++++++++-
 9 files changed, 532 insertions(+), 25 deletions(-)
 copy examples/autograd/{mnist_multiprocess.py => sparsification_mnist.py} (71%)