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merge with torch #1

Merged
merged 275 commits into from
Dec 12, 2016
Merged

merge with torch #1

merged 275 commits into from
Dec 12, 2016

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elikosan
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soumith and others added 30 commits July 29, 2016 01:09
Pass CMAKE_CXX_COMPILER to new select_compute_arch.cmake
This allows to compile THC without cutorch
scatter / gather to new types
Fix sub and div for integer types
Index* and sort for new types
Use TH_INDEX_BASE in THC
Fixing bug in regex not accepting 2.1(2.0) notation
adding multiple types to squeeze
killeent and others added 29 commits November 15, 2016 13:31
Magma functions to generic
Implement fmod, remainder, equal in Cutorch
fix memory leak in (equal)
Add half support for addmv and addr.
guard random functions for half
Previously, cutorch would initialize every CUDA device and enable P2P
access between all pairs. This slows down start-up, especially with 8
devices. Now, THCudaInit does not initialize any devices and P2P access
is enabled lazily. Setting the random number generator seed also does
not initialize the device until random numbers are actually used.
* Implemented cudaMemGetInfo for caching allocator
Lazily initialize CUDA devices
Revert "Lazily initialize CUDA devices"
Previously, cutorch would initialize every CUDA device and enable P2P
access between all pairs. This slows down start-up, especially with 8
devices. Now, THCudaInit does not initialize any devices and P2P access
is enabled lazily. Setting the random number generator seed also does
not initialize the device until random numbers are actually used.
Lazily initialize CUDA devices (take 2)
use local modified select_compute_arch.cmake for msvc
Adds a CUDA "sleep" kernel which spins for the given number of
iterations. This is useful for testing correct synchronization with
streams.
Adds a caching allocator for CUDA pinned (page-locked) memory. This
avoid synchronization due to cudaFreeHost or cudaHostUnregister at the
expense of potentially higher host memory usage.

Correctness is preserved by recording CUDA events after each
cudaMemcpyAsync involving the pinned memory. The pinned memory
allocations are not reused until all events associated with it have
completed.
Add caching allocator for pinned (page-locked) memory
Without this, the cuda_events could continuously grow from calls to
cudaMemcpyAsync, but would never be processed if there were no new
pinned memory allocations.

For example:

 t1 = cutorch.createCudaHostTensor(10)
 t2 = torch.CudaTensor(10)
 while true do t2:copyAsync(t1) end
Process outstanding CUDA events in recordEvent
TensorInfo related code documentation
@elikosan elikosan merged commit ffc32fa into elikosan:master Dec 12, 2016
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