linux-kernel - Re: [PATCH v2 2/5] tick/broadcast: Split __tick_broadcast_oneshot

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Message-ID: <c3573cd8-a4c8-43c2-be66-8b74d688a406@linux.alibaba.com>
Date:   Thu, 27 May 2021 15:23:06 +0800
From:   Xin Hao <xhao@...ux.alibaba.com>
To:     will@...nel.org
Cc:     fweisbec@...il.com, john.stultz@...aro.org,
        kernel-team@...roid.com, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, lorenzo@...gle.com, maz@...nel.org,
        mika.penttila@...tfour.com, sboyd@...nel.org, tglx@...utronix.de
Subject: Re: [PATCH v2 2/5] tick/broadcast: Split
 __tick_broadcast_oneshot_control() into a helper

Hi  will:

      I  had backport you  tick/broadcast: Prefer per-cpu relatives 
patches,

but i did not get the true result,  the Wakeup Devices are all null, why?

my machine is armv8-a arm64

#cat current_clocksource
arch_sys_counter

my local clock event is

Tick Device: mode:     1
Per CPU device: 95
Clock Event Device: arch_sys_timer
  max_delta_ns:   21474836451
  min_delta_ns:   1000
  mult:           429496730
  shift:          32
  mode:           3
  next_event:     14951080000000 nsecs
  set_next_event: arch_timer_set_next_event_phys
  shutdown: arch_timer_shutdown_phys
  oneshot stopped: arch_timer_shutdown_phys
  event_handler:  hrtimer_interrupt
  retries:        70
Wakeup Device: <NULL>

cat /proc/timer_list  | grep "Wakeup Device:"

Wakeup Device: <NULL>
Wakeup Device: <NULL>
Wakeup Device: <NULL>
Wakeup Device: <NULL>
Wakeup Device: <NULL>
Wakeup Device: <NULL>
Wakeup Device: <NULL>
Wakeup Device: <NULL>
Wakeup Device: <NULL>
Wakeup Device: <NULL>
Wakeup Device: <NULL>
Wakeup Device: <NULL>
Wakeup Device: <NULL>
Wakeup Device: <NULL>
Wakeup Device: <NULL>
Wakeup Device: <NULL>
Wakeup Device: <NULL>

Wakeup Device: <NULL>

-- 
Best Regards!
Xin Hao