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SubjectRe: [PATCH 08/57] microblaze_v7: Interrupt handling, timer support, selfmod code
On Fri, 20 Mar 2009, Michal Simek wrote:
> > 2) a clock event device which has CLOCK_EVT_FEAT_PERIODIC flag set.
>
> You meant ONESHOT feature, right?

Sure :)

> # cat /proc/timer_list
> Timer List Version: v0.4
> HRTIMER_MAX_CLOCK_BASES: 2
> now at 17205889582 nsecs
>
> cpu: 0
> clock 0:
> .base: 9027a4d0
> .index: 0
> .resolution: 1 nsecs
> .get_time: ktime_get_real
> .offset: 0 nsecs
> active timers:
> clock 1:
> .base: 9027a4fc
> .index: 1
> .resolution: 1 nsecs
> .get_time: ktime_get
> .offset: 0 nsecs
> active timers:
> #0: per_cpu__tick_cpu_sched, tick_sched_timer, S:01, <800005a6>, swapper/1
> # expires at 17210000000-17210000000 nsecs [in 4110418 to 4110418 nsecs]
> #1: <9f2d3a48>, hrtimer_wakeup, S:01, <9f2d3a48>, inetd/54
> # expires at 17430563969-17431563926 nsecs [in 224674387 to 225674344 nsecs]
> #2: <9e127a48>, hrtimer_wakeup, S:01, <9e127a48>, thttpd/50
> # expires at 129748538823-129848538823 nsecs [in 112542649241 to 112642649241
> nsecs]
> .expires_next : 17210000000 nsecs
> .hres_active : 1

Looks good. Now you can enable CONFIG_NOHZ as well. :) That needs just
the following extras in your idle loop:

--> tick_nohz_stop_sched_tick(1);
while (!need_resched())
idle();
--> tick_nohz_restart_sched_tick();

Thanks,

tglx


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