Re: [LAD] a *simple* ring buffer, comments pls?

yes and no: it is perfectly fine to use locks to use multiple real-time threads, but the thread A fails to acquire a lock, it will be suspended and woken up once thread B releases the lock. the time between `B releases the lock' and `A resumes its execution' is the scheduling latency, which is both os and hardware related. 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). however one can avoid the scheduling latency by using spinlocks if one can ensure that none of the synchronized threads can be preempted. personally i achieve this by (a) using real-time scheduling, (b) using not more real-time threads than physical cores and (c) pinning the rt threads to separate cores. tim