Re: X15 alpha release: as fast as TUX but in user space

[Andi Kleen]

On Sat, Apr 28, 2001 at 04:30:30PM +0300, Ville Herva wrote:
> Yes, that's vaguely resembles what I had in mind. Of course I had no idea
> about the data structures Tux or X15 use internally, so I couldn't think it
> too thoroughly.

You can also just use the cycle counter directly in most modern CPUs. It can
be read with a single instruction.
In fact modern glibc will do it for you when you use 
clock_gettime(CLOCK_PROCESS_CPUTIME_ID, ...) 

-Andi
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [EMAIL PROTECTED]
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/