| // Copyright 2023 The Dawn Authors |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| #include "dawn/native/ExecutionQueue.h" |
| |
| namespace dawn::native { |
| |
| ExecutionSerial ExecutionQueueBase::GetPendingCommandSerial() const { |
| return mLastSubmittedSerial + ExecutionSerial(1); |
| } |
| |
| ExecutionSerial ExecutionQueueBase::GetLastSubmittedCommandSerial() const { |
| return mLastSubmittedSerial; |
| } |
| |
| ExecutionSerial ExecutionQueueBase::GetCompletedCommandSerial() const { |
| return mCompletedSerial; |
| } |
| |
| MaybeError ExecutionQueueBase::CheckPassedSerials() { |
| ExecutionSerial completedSerial; |
| DAWN_TRY_ASSIGN(completedSerial, CheckAndUpdateCompletedSerials()); |
| |
| ASSERT(completedSerial <= mLastSubmittedSerial); |
| // completedSerial should not be less than mCompletedSerial unless it is 0. |
| // It can be 0 when there's no fences to check. |
| ASSERT(completedSerial >= mCompletedSerial || completedSerial == ExecutionSerial(0)); |
| |
| if (completedSerial > mCompletedSerial) { |
| mCompletedSerial = completedSerial; |
| } |
| |
| return {}; |
| } |
| |
| void ExecutionQueueBase::AssumeCommandsComplete() { |
| // Bump serials so any pending callbacks can be fired. |
| mLastSubmittedSerial++; |
| mCompletedSerial = mLastSubmittedSerial; |
| } |
| |
| void ExecutionQueueBase::IncrementLastSubmittedCommandSerial() { |
| mLastSubmittedSerial++; |
| } |
| |
| bool ExecutionQueueBase::HasScheduledCommands() const { |
| return mLastSubmittedSerial > mCompletedSerial || HasPendingCommands(); |
| } |
| |
| // All prevously submitted works at the moment will supposedly complete at this serial. |
| // Internally the serial is computed according to whether frontend and backend have pending |
| // commands. There are 4 cases of combination: |
| // 1) Frontend(No), Backend(No) |
| // 2) Frontend(No), Backend(Yes) |
| // 3) Frontend(Yes), Backend(No) |
| // 4) Frontend(Yes), Backend(Yes) |
| // For case 1, we don't need the serial to track the task as we can ack it right now. |
| // For case 2 and 4, there will be at least an eventual submission, so we can use |
| // 'GetPendingCommandSerial' as the serial. |
| // For case 3, we can't use 'GetPendingCommandSerial' as it won't be submitted surely. Instead we |
| // use 'GetLastSubmittedCommandSerial', which must be fired eventually. |
| ExecutionSerial ExecutionQueueBase::GetScheduledWorkDoneSerial() const { |
| return HasPendingCommands() ? GetPendingCommandSerial() : GetLastSubmittedCommandSerial(); |
| } |
| |
| } // namespace dawn::native |