Commit 1b2febb9b7f726a113c80e40b9729a9350ab70df
2021-08-23T12:39:16
Trace Tests: Refactor calibration logic. Instead of calling glFinish every step we now run a few warmup loops to try and figure out the right step interval. On each run we refine the step interval until we reach a number that completes in the specific time after a single glFinish call. This method will use the specified test time much more consistenty. Also a couple other improvements. Will use more test time on the bots because previously they were using a calibration/warmup time of 1 second per run loop, and this bumps it up to 3 per run loop. Long explanation below. What we did before: step() glFinish() step() glFinish() .. repeat for "gCalibrationTime" seconds then take the number of steps, the actual time ran, and compute an estimate for "mStepsToRun". When we run for real, we go: step() step() step() .. repeat for "mStepsToRun" steps. glFinish() this has an obvious performance difference, because after each step() (one frame in a trace) you had a complete stall. The new code first does the above to compute a tentative mStepsToRun, then uses the results of the second run to compute a much more accurate mStepsToRun by using the "actual" time it took to run the estimate. Bug: angleproject:6090 Change-Id: I0ff19873580e13f2af5a145a21f5b1c59fb15795 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/3114606 Commit-Queue: Jamie Madill <jmadill@chromium.org> Reviewed-by: Cody Northrop <cnorthrop@google.com> Reviewed-by: Tim Van Patten <timvp@google.com>