Hi Haris, On Thu, 28 Jun 2018, Haris Okanovic wrote: > Collect expired timers in interrupt context to avoid overhead of waking > ktimersoftd on every scheduler tick. > > This is implemented by storing lists of expired timers in the timer_base > struct, which is updated by the interrupt routing on each tick in > run_local_timers(). TIMER softirq (ktimersoftd) is then raised only when > one or more expired timers are collected. > > Performance impact on a 2core Intel Atom E3825 system: > * reduction in small latency spikes measured by cyclictest > * ~30% fewer context-switches measured by perf > * run_local_timers() execution time increases by 0.2 measured by TSC > I'm also working on timer improvements at the moment. When I fixed all my bugs in my implementation (there is a last horrible one), I'm very interested in integrating your patches into my testing to be able to give you a tested-by. Thanks, Anna-Maria -- To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
