linux-kernel - Re: clockevent questions

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Date:	Wed, 16 May 2007 09:42:02 +0200
From:	"Francis Moreau" <francis.moro@...il.com>
To:	"Thomas Gleixner" <tglx@...utronix.de>
Cc:	linux-kernel@...r.kernel.org, "Ingo Molnar" <mingo@...e.hu>
Subject: Re: clockevent questions

Hi Thomas,

On 5/16/07, Thomas Gleixner <tglx@...utronix.de> wrote:
> Francis,
>
> On Tue, 2007-05-15 at 10:47 +0200, Francis Moreau wrote:
> > My question is about the clock resolution field which is equal to 1ns.
> > How is this possible since my timer's frequency is only 100Mhz ?
>
> you are right. It is a bit strange. The resolution info is not really
> reflecting the clock event source capability. I look if there is a sane
> solution for that.
>

Doesn't that make hrtimer_get_res() and its callers buggy since they
return this 1ns value which is not reflecting the correct clock event
capability ?

Another question about the output of '/proc/timer_list':

[...]
active timers:
 #0: <c03fde10>, tick_sched_timer, S:01
 # expires at 64696546875000 nsecs [in 2514469 nsecs]
 .expires_next   : 64696546875000 nsecs
[...]

Doesn't the 2 expire time lines give the same information ? If so,
couldn't we merge them into : ".expires_next   : 64696546875000 nsecs
[in 2514469 nsecs]" ?

Thanks
-- 
Francis
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