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Make the first device share data with the global scope in parallel_do_op. #9398

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Mar 27, 2018
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Make the first device share data with the global scope in parallel_do_op. #9398

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7 changes: 6 additions & 1 deletion paddle/fluid/operators/parallel_do_op.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -144,7 +144,12 @@ class ParallelDoOp : public framework::OperatorBase {
PADDLE_ENFORCE(scope.FindVar(param)->IsType<LoDTensor>(),
"Only support parameter type as LoDTensor");
auto &src = scope.FindVar(param)->Get<LoDTensor>();
for (size_t i = 0; i < sub_scopes.size(); ++i) {

auto *sub_scope0 = sub_scopes[0];
auto *dst0 = sub_scope0->Var(param)->GetMutable<LoDTensor>();
dst0->ShareDataWith(src);

for (size_t i = 1; i < sub_scopes.size(); ++i) {
auto &place = places[i];
auto *sub_scope = sub_scopes[i];
auto *dst = sub_scope->Var(param)->GetMutable<LoDTensor>();
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