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[Vulkan][Runtime] Added dummy implementations for TVMStreamHandle operations #7969

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May 4, 2021
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[Vulkan][Runtime] Added dummy implementations for TVMStreamHandle operations #7969

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27 changes: 15 additions & 12 deletions src/runtime/vulkan/vulkan.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -373,29 +373,32 @@ class VulkanDeviceAPI final : public DeviceAPI {
}

public:
// Always use the default stream
TVMStreamHandle CreateStream(Device dev) {
LOG(FATAL) << "Not implemented";
return nullptr;
}

void FreeStream(Device dev, TVMStreamHandle stream) {
LOG(FATAL) << "Not implemented";
// Current vulkan implementation has one "stream" per CPU thread,
// with all commands writing into a single command buffer that is
// submitted on a call to StreamSync. Therefore, for now, these are
// mostly no-ops. If needed in the future, could have multiple
// command buffers to act as multiple streams.
TVMStreamHandle CreateStream(Device dev) final { return nullptr; }

void FreeStream(Device dev, TVMStreamHandle stream) final {
ICHECK_EQ(stream, static_cast<void*>(nullptr));
return;
}

void SyncStreamFromTo(Device dev, TVMStreamHandle event_src, TVMStreamHandle event_dst) {
LOG(FATAL) << "Not implemented";
// Syncing two streams is a nop, since there is only one stream.
void SyncStreamFromTo(Device dev, TVMStreamHandle event_src, TVMStreamHandle event_dst) final {
ICHECK_EQ(event_src, static_cast<void*>(nullptr));
ICHECK_EQ(event_dst, static_cast<void*>(nullptr));
return;
}

void StreamSync(Device dev, TVMStreamHandle stream) final {
ICHECK(stream == nullptr);
ICHECK_EQ(stream, static_cast<void*>(nullptr));
VulkanThreadEntry::ThreadLocal()->Stream(dev.device_id)->Synchronize();
}

void SetStream(Device dev, TVMStreamHandle stream) final {
LOG(FATAL) << "Not implemented";
ICHECK_EQ(stream, static_cast<void*>(nullptr));
return;
}

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