Created by: gongweibao

[10:08:19]	[Step 1/1] /paddle/paddle/fluid/operators/nccl_op_test.cu.cc:237: Failure
[10:08:19]	[Step 1/1] The difference between ct[j] and expected_result is 85, which exceeds 1e-5, where
[10:08:19]	[Step 1/1] ct[j] evaluates to 0,
[10:08:19]	[Step 1/1] expected_result evaluates to 85, and
[10:08:19]	[Step 1/1] 1e-5 evaluates to 1.0000000000000001e-05.
[10:08:19]	[Step 1/1] [  FAILED  ] NCCLTester.ncclReduceOp (9 ms)