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Diffstat (limited to 'sway/sway-output.5.scd')
| -rw-r--r-- | sway/sway-output.5.scd | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/sway/sway-output.5.scd b/sway/sway-output.5.scd index ae6ced24..01496f19 100644 --- a/sway/sway-output.5.scd +++ b/sway/sway-output.5.scd @@ -107,6 +107,30 @@ must be separated by one space. For example: Enables or disables the specified output via DPMS. To turn an output off (ie. blank the screen but keep workspaces as-is), one can set DPMS to off. +*output* <name> max_render_time off|<msec> + When set to a positive number of milliseconds, enables delaying output + rendering to reduce latency. The rendering is delayed in such a way as + to leave the specified number of milliseconds before the next + presentation for rendering. + + The output rendering normally takes place immediately after a + presentation (vblank, buffer flip, etc.) and the frame callbacks are + sent to surfaces immediately after the rendering to give surfaces the + most time to draw their next frame. This results in slightly below 2 + frames of latency between the surface rendering and committing new + contents, and the contents being shown on screen, on average. When the + output rendering is delayed, the frame callbacks are sent immediately + after presentation, and the surfaces have a small timespan (1 / + (refresh rate) - max_render_time) to render and commit new contents to + be shown on the next presentation, resulting in below 1 frame of + latency. + + To set this up for optimal latency: + . Launch some _full-screen_ application that renders continuously, like + *glxgears*. + . Start with *max_render_time 1*. Increment by *1* if you see frame + drops. + # SEE ALSO *sway*(5) *sway-input*(5) |