diff options
Diffstat (limited to 'chromium/cc/output/begin_frame_args.cc')
| -rw-r--r-- | chromium/cc/output/begin_frame_args.cc | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/chromium/cc/output/begin_frame_args.cc b/chromium/cc/output/begin_frame_args.cc index cefb22bdc13..d7da76c3bcb 100644 --- a/chromium/cc/output/begin_frame_args.cc +++ b/chromium/cc/output/begin_frame_args.cc @@ -48,10 +48,14 @@ BeginFrameArgs BeginFrameArgs::CreateExpiredForTesting() { DefaultInterval()); } +// This is a hard-coded deadline adjustment that assumes 60Hz, to be used in +// cases where a good estimated draw time is not known. Using 1/3 of the vsync +// as the default adjustment gives the Browser the last 1/3 of a frame to +// produce output, the Renderer Impl thread the middle 1/3 of a frame to produce +// ouput, and the Renderer Main thread the first 1/3 of a frame to produce +// output. base::TimeDelta BeginFrameArgs::DefaultDeadlineAdjustment() { - // Using a large deadline adjustment will effectively revert BeginFrame - // scheduling to the hard vsync scheduling we used to have. - return base::TimeDelta::FromSeconds(-1); + return base::TimeDelta::FromMicroseconds(-16666 / 3); } base::TimeDelta BeginFrameArgs::DefaultInterval() { @@ -62,5 +66,4 @@ base::TimeDelta BeginFrameArgs::DefaultRetroactiveBeginFramePeriod() { return base::TimeDelta::FromMicroseconds(4444); } - } // namespace cc |