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fix copy bug #7159

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merged 7 commits into from
Dec 31, 2021
Merged

fix copy bug #7159

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fbefc9c
fix copy bug
liufengwei0103 Dec 31, 2021
866dce4
add to test case
liufengwei0103 Dec 31, 2021
dd0ef77
refine
liufengwei0103 Dec 31, 2021
a7f38c1
Merge branch 'master' into fix_copy_bug
oneflow-ci-bot Dec 31, 2021
bb5e751
fix test case
liufengwei0103 Dec 31, 2021
b282d2c
Merge branch 'fix_copy_bug' of github.com:Oneflow-Inc/oneflow into fi…
liufengwei0103 Dec 31, 2021
de94b65
Merge branch 'master' into fix_copy_bug
oneflow-ci-bot Dec 31, 2021
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4 changes: 2 additions & 2 deletions oneflow/user/ops/copy_op.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -24,9 +24,9 @@ namespace {
Maybe<Symbol<Device>> MakeOpDevice(const Symbol<Device>& in_device,
const Symbol<Device>& out_device) {
if (JUST(in_device->of_type()) == "gpu" && JUST(out_device->of_type()) == "cpu") {
return Device::New("cuda_d2h");
return Device::New("cuda_d2h", in_device->device_id());
} else if (JUST(in_device->of_type()) == "cpu" && JUST(out_device->of_type()) == "gpu") {
return Device::New("cuda_h2d");
return Device::New("cuda_h2d", out_device->device_id());
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这里是修复了copy op实现上的一个bug：在new Device时如果不带上输出的device id，会走到

/* static */ Maybe<Symbol<Device>> Device::New(const std::string& type) {
  return New(type, GlobalProcessCtx::LocalRank());
}

仅通过type构造的Device，其device id默认为本进程所在rank，而不是to.("cuda:x")的目标device x

} else {
return Device::New(out_device->type(), out_device->device_id());
}
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