[mythtv-users] Kernel options, Preemption model and Timer frequency

[Rajil Saraswat]

I am chasing Audio/Video sync problems, and was wondering what are the
best kernel options for the BE server. Amongst the three preemption
models (CONFIG_PREEMPT_NONE, CONFIG_PREEMPT_VOLUNTARY, CONFIG_PREEMPT)
which is the best choice. Likewise for Timer Frequency ( CONFIG_HZ_100,
CONFIG_HZ_250, CONFIG_HZ_300 and CONFIG_HZ_1000), which is the best choice.

At the moment on the FE i am seeing errors like so during LiveTV,

2018-05-12 15:44:39.163391 N  Player(0): Waited 4177ms for video buffers
AAAAAAAAAAAUUUUUUUUUUUuLAAAAAAAP
2018-05-12 15:44:39.180607 I  Player(0): Video is 11438.3 frames behind
audio (too slow), dropping frame to catch up.
2018-05-12 15:44:39.180639 I  Player(0): Video is 20016.2 frames behind
audio (too slow), dropping frame to catch up.
2018-05-12 15:44:39.180649 I  Player(0): Waiting for video buffers...
2018-05-12 15:44:39.281204 N  Player(0): Waited 101ms for video buffers
AAAAAAAAAAAAAAUUUUUUUUUUuAAAAAAP
2018-05-12 15:44:39.321036 I  Player(0): Video is 26449.5 frames behind
audio (too slow), dropping frame to catch up.
2018-05-12 15:44:39.321056 I  Player(0): Waiting for video buffers...
2018-05-12 15:44:39.325482 I  Player(0): Video is 31274.3 frames behind
audio (too slow), dropping frame to catch up.
2018-05-12 15:44:39.325501 I  Player(0): Waiting for video buffers...
2018-05-12 15:44:39.344897 I  Player(0): Video is 29468.8 frames ahead
of audio,
                        doubling video frame interval to slow down.

Thanks