linux-kernel - Re: High-resolution timers not supported when using smp

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Date:	Thu, 30 Apr 2015 09:42:21 -0700
From:	John Stultz <john.stultz@...aro.org>
To:	Mason <slash.tmp@...e.fr>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Catalin Marinas <catalin.marinas@....com>
Subject: Re: High-resolution timers not supported when using smp_twd

On Thu, Apr 30, 2015 at 5:46 AM, Mason <slash.tmp@...e.fr> wrote:
> Hello,
>
> I wanted to enable high-resolution timers on this Cortex A9 system,
> but it seems there is more to it than just enabling
>
>   CONFIG_HIGH_RES_TIMERS=y
>
> (The system is limited to jiffy resolution.)

You might make sure you've got a HRT enabled clocksource installed?

You might check
/sys/devices/system/clocksource/clocksource0/current_clocksource ?

thanks
-john
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