Thread (6 messages) 6 messages, 3 authors, 2008-04-28

Re: get_cycles()

From: Kevin Diggs <hidden>
Date: 2008-04-27 09:51:03

David Miller wrote:
From: Kevin Diggs <redacted>
Date: Sat, 26 Apr 2008 19:39:07 -0700

quoted
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
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