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[CODEGEN] Reverted to old way to query current stream

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This commit is contained in:
Philippe Tillet
2021-11-16 00:17:27 -08:00
parent b908095872
commit 791b953b21
1 changed files with 9 additions and 9 deletions
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18
python/triton/code_gen.py
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@@ -657,15 +657,15 @@ class Kernel:
torch.cuda.set_device(device)
cc = torch.cuda.get_device_capability(device)
cc = str(cc[0]) + '-' + str(cc[1])
# query stream
# this is hacky but much faster than `torch.cuda.current_stream(device).cuda_stream`
# https://github.com/pytorch/pytorch/blob/master/c10/core/Stream.h#L154
# building a C wrapper to re-use the unpack function would add a build-time torch dependency
# and require different wheels for different torch versions -- undesirable!
bits = torch._C._cuda_getCurrentStream(device)
mask = 1 << 47
stream = ((bits & 0xFFFFFFFFFFFF) ^ mask) - mask
# stream = torch.cuda.current_stream(device).cuda_stream
# # query stream
# # this is hacky but much faster than `torch.cuda.current_stream(device).cuda_stream`
# # https://github.com/pytorch/pytorch/blob/master/c10/core/Stream.h#L154
# # building a C wrapper to re-use the unpack function would add a build-time torch dependency
# # and require different wheels for different torch versions -- undesirable!
# bits = torch._C._cuda_getCurrentStream(device)
# mask = 1 << 47
# stream = ((bits & 0xFFFFFFFFFFFF) ^ mask) - mask
stream = torch.cuda.current_stream(device).cuda_stream
# make key for cache
return _triton.runtime.launch(wargs, self.fn.do_not_specialize, self.fn.cache_key + cc, self.fn.arg_names, device, stream,
self.fn.bin_cache, num_warps, num_stages, self.add_to_cache, grid)