From: Kevin Diggs <kevdig@hypersurf.com>
To: linuxppc-dev@ozlabs.org
Subject: Re: get_cycles()
Date: Sun, 27 Apr 2008 03:35:54 -0700 [thread overview]
Message-ID: <48145709.9020809@hypersurf.com> (raw)
In-Reply-To: <20080426.202135.145326755.davem@davemloft.net>
David Miller wrote:
> From: Kevin Diggs <kevdig@hypersurf.com>
> Date: Sat, 26 Apr 2008 19:39:07 -0700
>
>
>>This looks pretty cool ... but I don't want to create a dependency on
>>hrtimer.
>
>
> It doesn't create such a dependency.
>
> We use it unconditionally in the generic networking.
>
> Please don't use platform specific interfaces if you don't have to.
> You're be insulated from so many things.
>
I'm working on a cpufreq driver for the 750GX so I don't think I have to
worry about being to platform specific.
Would a compile time configuration be a good idea (hrtimer or
get_cycles() assisted timing)?
In the 2.4 code I just used a timer 2 ticks in the future to be certain
I did not go under the 100 us PLL lock delay. I was trying to see if I
could cut the latency down.
What about using OF? Isn't there a timebase property for the cpus?
Thoughts?
kevin
next prev parent reply other threads:[~2008-04-27 9:51 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-04-26 7:54 get_cycles() Kevin Diggs
2008-04-26 7:11 ` get_cycles() David Miller
2008-04-27 2:39 ` get_cycles() Kevin Diggs
2008-04-27 3:21 ` get_cycles() David Miller
2008-04-27 10:35 ` Kevin Diggs [this message]
2008-04-28 4:38 ` get_cycles() Tony Breeds
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