| // Copyright 2023 The Dawn & Tint Authors |
| // |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are met: |
| // |
| // 1. Redistributions of source code must retain the above copyright notice, this |
| // list of conditions and the following disclaimer. |
| // |
| // 2. Redistributions in binary form must reproduce the above copyright notice, |
| // this list of conditions and the following disclaimer in the documentation |
| // and/or other materials provided with the distribution. |
| // |
| // 3. Neither the name of the copyright holder nor the names of its |
| // contributors may be used to endorse or promote products derived from |
| // this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| // AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| // IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| // DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE |
| // FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| // DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
| // SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
| // CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| // OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| #include "dawn/native/ExecutionQueue.h" |
| |
| namespace dawn::native { |
| |
| ExecutionSerial ExecutionQueueBase::GetPendingCommandSerial() const { |
| return ExecutionSerial(mLastSubmittedSerial.load(std::memory_order_acquire) + 1); |
| } |
| |
| ExecutionSerial ExecutionQueueBase::GetLastSubmittedCommandSerial() const { |
| return ExecutionSerial(mLastSubmittedSerial.load(std::memory_order_acquire)); |
| } |
| |
| ExecutionSerial ExecutionQueueBase::GetCompletedCommandSerial() const { |
| return mCompletedSerial; |
| } |
| |
| MaybeError ExecutionQueueBase::CheckPassedSerials() { |
| ExecutionSerial completedSerial; |
| DAWN_TRY_ASSIGN(completedSerial, CheckAndUpdateCompletedSerials()); |
| |
| DAWN_ASSERT(completedSerial <= |
| ExecutionSerial(mLastSubmittedSerial.load(std::memory_order_acquire))); |
| // completedSerial should not be less than mCompletedSerial unless it is 0. |
| // It can be 0 when there's no fences to check. |
| DAWN_ASSERT(completedSerial >= mCompletedSerial || completedSerial == ExecutionSerial(0)); |
| |
| if (completedSerial > mCompletedSerial) { |
| mCompletedSerial = completedSerial; |
| } |
| |
| return {}; |
| } |
| |
| void ExecutionQueueBase::AssumeCommandsComplete() { |
| // Bump serials so any pending callbacks can be fired. |
| uint64_t prev = mLastSubmittedSerial.fetch_add(1u, std::memory_order_release); |
| mCompletedSerial = ExecutionSerial(prev + 1); |
| } |
| |
| void ExecutionQueueBase::IncrementLastSubmittedCommandSerial() { |
| mLastSubmittedSerial.fetch_add(1u, std::memory_order_release); |
| } |
| |
| bool ExecutionQueueBase::HasScheduledCommands() const { |
| return ExecutionSerial(mLastSubmittedSerial.load(std::memory_order_acquire)) > |
| 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 |