Re: PROBLEM: no cpu MHz in /proc/cpuinfo on 2.6.25.4-rt6

[Arjan van de Ven <arjan@infradead.org>]

On Wed, 11 Jun 2008 16:37:38 -0400
> > Mark 
> > 
> 
> Ok, what would one use besides the tsc to take a fast high-res time
> stamp in a kernel module that could also be used in user land (same
> time source) to for instance calculate  the the time between an event
> in the kernel to an event in user land?
> 
> do_gettimeofday / gettimeofday are not really acceptable.


why not? both of these (they're teh same) are the best the kernel can
do. If there was a better way to do it, gettimeofday() would use it.
It's not even a system call if we can get away with it
(although system calls are pretty cheap)

really, think about it. if there was a better way, gettimeofday() would
use it.


-- 
If you want to reach me at my work email, use arjan@linux.intel.com
For development, discussion and tips for power savings, 
visit http://www.lesswatts.org