commit 5dd493b3daa06091c0f85829f32d0629b31fe447
author Sergey Silkin <ssilkin@webrtc.org> Fri Feb 03 15:23:41 2023
committer WebRTC LUCI CQ <webrtc-scoped@luci-project-accounts.iam.gserviceaccount.com> Mon Feb 13 15:07:16 2023
tree 6ad93bf5aa6cd5bcc4a8bbe2559bed954258aedb
parent 5f246cb2bf3a867ea8abd5dbe07632ef57889b4b

Do not use PostDelayedTask in video codec tester's pacer

PostDelayedTask doesn't guarantee task execution order. For example,
if you post two tasks, A and B, back-to-back using the same delay
there is no guarantee that A will be executed before B.

Re-implemented pacing using sleep(). Changed pacer to compute task
scheduled time instead of delay. Sleep time is calculated right before
task start. This provides better accuracy by accounting for any delays
that may happen after pacing time is computed and before task queue is
ready to run the task.

It is tricky to implement pacer tests using simulated clocks. The test
use system time which make them flacky on low performance bots. Keep
the test disabled by default.

Bug: b/261160916, webrtc:14852
Change-Id: I88e1a2001e6d33cf3bb7fe16730ec28abf90acc8
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/291804
Reviewed-by: Rasmus Brandt <brandtr@webrtc.org>
Commit-Queue: Sergey Silkin <ssilkin@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#39302}