** Changed in: mir
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/1557442
Title:
NBS causes sudden loss of performance after un-fullscreening a swap
interval zero client
Status in Mir:
Fix Released
Status in mir package in Ubuntu:
New
Bug description:
NBS causes loss of frame dropping after un-fullscreening a window.
When this occurs, the client only ever sees 2 buffers instead of 3,
and so starts getting incorrectly sync'd to the screen:
[2016-03-15 18:29:08.885810] perf: mir_demo_client_camera.bin: 186.81 FPS,
render time 5.16ms, buffer lag 9.79ms (3 buffers)
[2016-03-15 18:29:09.889336] perf: mir_demo_client_camera.bin: 187.43 FPS,
render time 5.21ms, buffer lag 10.06ms (3 buffers)
[2016-03-15 18:29:10.892904] perf: mir_demo_client_camera.bin: 187.43 FPS,
render time 5.13ms, buffer lag 9.99ms (3 buffers)
[2016-03-15 18:29:11.896299] perf: mir_demo_client_camera.bin: 187.43 FPS,
render time 5.22ms, buffer lag 9.91ms (3 buffers)
[2016-03-15 18:29:12.906866] perf: mir_demo_client_camera.bin: 170.29 FPS,
render time 4.80ms, buffer lag 11.10ms (15 buffers)
[2016-03-15 18:29:13.907306] perf: mir_demo_client_camera.bin: 60.00 FPS,
render time 0.16ms, buffer lag 33.12ms (20 buffers)
[2016-03-15 18:29:14.908295] perf: mir_demo_client_camera.bin: 60.00 FPS,
render time 0.12ms, buffer lag 33.23ms (4 buffers)
[2016-03-15 18:29:15.908972] perf: mir_demo_client_camera.bin: 60.00 FPS,
render time 0.12ms, buffer lag 33.23ms (2 buffers)
[2016-03-15 18:29:16.909945] perf: mir_demo_client_camera.bin: 60.00 FPS,
render time 0.12ms, buffer lag 33.24ms (2 buffers)
[2016-03-15 18:29:17.910827] perf: mir_demo_client_camera.bin: 60.00 FPS,
render time 0.13ms, buffer lag 33.23ms (2 buffers)
[2016-03-15 18:29:18.911693] perf: mir_demo_client_camera.bin: 60.00 FPS,
render time 0.13ms, buffer lag 33.22ms (2 buffers)
[2016-03-15 18:29:19.912521] perf: mir_demo_client_camera.bin: 60.00 FPS,
render time 0.13ms, buffer lag 33.22ms (2 buffers)
[2016-03-15 18:29:20.913369] perf: mir_demo_client_camera.bin: 60.00 FPS,
render time 0.13ms, buffer lag 33.22ms (2 buffers)
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