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fix comment in graph_helper.cc #76340

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fix comment in graph_helper.cc #76340

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6 changes: 3 additions & 3 deletions paddle/fluid/framework/ir/graph_helper.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -547,12 +547,12 @@ void ReplaceAllReduceOp(const Node &node,
// ### v1 = op1(grad1)
// It is converted to:
// ### fused_grad = check_memory_continue(grad0, grad1, grad2, ...)
// ### fused_grad = c_sum_allreduce(fused_grad)
// ### fused_grad = all_reduce(fused_grad)
// ### v0 = op0(grad0)
// ### v1 = op1(grad1)
// We should add the following dependency to ensure that op0 and op1 both run
// after c_sum_allreduce:
// ### grad0 = depend(grad0, fused_grad)
// after all_reduce(sum):
// ### grad0 = depend(grad0, fused_grad)
// ### grad1 = depend(grad1, fused_grad)
if (is_fused) {
for (const auto &in : in_var_handles) {
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