[CUDA graphs] Error if attempting to capture uncapturable nccl (#64440)
Summary:
NCCL < 2.9.6 is not capturable. Attempting to capture it can cause nasty behavior (for example, ive seen capture succeed, but replay silently hang). Pytorch should preempt this with a friendlier error.
cc pietern mrshenli pritamdamania87 zhaojuanmao satgera rohan-varma gqchen aazzolini osalpekar jiayisuse agolynski SciPioneer H-Huang mrzzd cbalioglu gcramer23
Pull Request resolved: https://github.com/pytorch/pytorch/pull/64440
Reviewed By: mruberry
Differential Revision: D30733884
Pulled By: ngimel
fbshipit-source-id: 5f2df3cf5cc0e5e68f49bf22a80d9f58064dc7ec
