On 2016-12-22 14:36:03 [+0100], Federico Reghenzani wrote: > I found this very old topic > > https://www.spinics.net/lists/linux-rt-users/msg05422.html > > is there any update on this? I want to disable the APIC timer in order > to increase the determinism of my system, but I'm not sure if this is > possible without editing the kernel source code. > > On my machine smp_apic_timer_interrupt takes 2-3 us, I know this is > already low, but it's actually the only "frequent" latency that I have > on the isolated cpu. You need a timer for each active CPU that participates in the system. The timer interrupt which comes each tick can't be disabled. You can look at NO_HZ_FULL where you can have an isolated CPU and as long as you don't go into kernel, you shouldn't see the timer interrupt very often. > Thank you, > Federico Reghenzani Sebastian -- 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
