12 Jul
2011
12 Jul
'11
11:59 a.m.
On 07/12/2011 11:15 AM, Tim Blechmann wrote:
btw, i have discussed this briefly in my master thesis, section 4.1 [1]. the
effect of the scheduling latency can also be observed in the benchmarks given in
section 5.
Wow, that's pretty exhaustive..
using preempt_rt, the scheduling latency can be very
low (like 10
microseconds), if cpu frequency scaling is applied or smt/hyperthreading is
enabled it can be as high as 250 microseconds (which is already quite
significant, if one is using small signal vector sizes).
That's interesting.
We're actually benchmarking scheduling latency at the
moment. and it would be great, if you can share your results,
i'd be curious to see
them!
I'll setup something when we're done. The tests can actually be found in:
http://code.google.com/p/andraudio/source/browse/experiments/scheduling
Beware though this is about non-RT. We're trying to see if running multiple
inter-connected audio clients is feasible on Android without adding latency.
--
Olivier