impeller::GpuSubmissionTracker Class Reference

Tracks GPU completion of submitted command buffers as a monotonic watermark. More...

#include <gpu_submission_tracker.h>

Public Member Functions
uint64_t	RecordSubmission ()
	Records a command buffer submission and returns its id.
void	RecordCompletion (uint64_t id)
	Marks a previously recorded submission as completed by the GPU.
uint64_t	CompletedThrough () const
uint64_t	LatestSubmission () const
	Returns the id of the most recent submission.

Detailed Description

Tracks GPU completion of submitted command buffers as a monotonic watermark.

Backends record an id for each submitted command buffer and mark it from the command buffer's completion callback. Consumers compare ids against [CompletedThrough] to find out whether the GPU is done with all work submitted up to a point in time, regardless of the order in which individual command buffers complete.

All methods are thread safe.

Definition at line 25 of file gpu_submission_tracker.h.

Member Function Documentation

CompletedThrough()

uint64_t impeller::GpuSubmissionTracker::CompletedThrough

(

)

const

Returns the highest id such that all submissions with ids up to and including it have completed.

Definition at line 26 of file gpu_submission_tracker.cc.

                                                      {
  Lock lock(mutex_);
  if (pending_.empty()) {
    return last_id_;
  }
  return pending_.front() - 1;
}

Referenced by impeller::testing::TEST().

LatestSubmission()

uint64_t impeller::GpuSubmissionTracker::LatestSubmission

(

)

const

Returns the id of the most recent submission.

Definition at line 34 of file gpu_submission_tracker.cc.

                                                      {
  Lock lock(mutex_);
  return last_id_;
}

Referenced by impeller::testing::TEST().

RecordCompletion()

void impeller::GpuSubmissionTracker::RecordCompletion

(

uint64_t

id

)

Marks a previously recorded submission as completed by the GPU.

Definition at line 18 of file gpu_submission_tracker.cc.

                                                       {
  Lock lock(mutex_);
  auto it = std::lower_bound(pending_.begin(), pending_.end(), id);
  if (it != pending_.end() && *it == id) {
    pending_.erase(it);
  }
}

Referenced by impeller::testing::TEST().

RecordSubmission()

uint64_t impeller::GpuSubmissionTracker::RecordSubmission

(

)

Records a command buffer submission and returns its id.

Definition at line 11 of file gpu_submission_tracker.cc.

                                                {
  Lock lock(mutex_);
  uint64_t id = ++last_id_;
  pending_.push_back(id);
  return id;
}

References id.

Referenced by impeller::testing::TEST().

---

The documentation for this class was generated from the following files:

• impeller/core/gpu_submission_tracker.h
• impeller/core/gpu_submission_tracker.cc