Hi John Thanks for your reply. > Are you using the RT patchset [1] and CONFIG_PREEMPT_RT_FULL? I'm able > to run at 44100Hz with 128 sample buffers on RK3288 with appropriate > thread priorities (although that is on a 4.4 series kernel, I haven't > tested audio performance on more recent versions). I can't find that setting in my kernel config. I saw those patch sets, but did not apply them yet since I am not sure how relevant they still are for a 4.10 kernel? Has anyone applied these patches to more recent kernels than 4.4 and is it possible to do so? When I grep for PREEMPT, I get this CONFIG_PREEMPT_RCU=y # CONFIG_PREEMPT_NONE is not set # CONFIG_PREEMPT_VOLUNTARY is not set CONFIG_PREEMPT=y CONFIG_PREEMPT_COUNT=y CONFIG_DEBUG_PREEMPT=y # CONFIG_PREEMPT_TRACER is not set > You may also want the pinctrl patchset I posted recently [2] to avoid > locking issues when using full RT preemption. > > [1] https://rt.wiki.kernel.org/index.php/Main_Page > [2] https://lkml.org/lkml/2017/3/23/208 Thanks, I'll check out your patch. Bert
