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emailweixu 2378679a9e Fix a dead lock bug for dyload/nccl.h when nccl lib cannot be loaded (#5533) ... It caused by a bug of std::call_once described in https://stackoverflow.com/questions/41717579/stdcall-once-hangs-on-second-call-after-callable-threw-on-first-call. It is likely caused by a deeper bug of pthread_once, which is discussed in https://patchwork.ozlabs.org/patch/482350/		7 years ago
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CMakeLists.txt	write nccl c++ test case	7 years ago
nccl_gpu_common.cc	"move nccl to another directory"	7 years ago
nccl_gpu_common.h	Fix a dead lock bug for dyload/nccl.h when nccl lib cannot be loaded (#5533)	7 years ago