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SubjectRe: Differences between FreeBSD and Linux system call mechanism
On Thu, 3 Sep 1998, MOLNAR Ingo wrote:

>
> On Thu, 3 Sep 1998, Richard B. Johnson wrote:
>
> > There is work being done on a new "SysCall" method. Time will
> > tell if it is really faster. [...]
>
> ?? I have posted a patch a few weeks ago that implements SYSENTER/SYSLEAVE
> based system call support, and have posted detailed (cycles accuracy)
> timings too. (and sample code that does a getpid() based on the new system
> entry point)
>
> > My guess is that it will be 6 of one-kind and 1/2 dozen of another.
>
> no need to guess, null syscall latency is twice as fast on a PII with
> SYSENTER, 150 cycles vs. 300+ cycles with INT.
>

Good.

Cheers,
Dick Johnson
***** FILE SYSTEM WAS MODIFIED *****
Penguin : Linux version 2.1.118 on an i586 machine (66.15 BogoMips).
Warning : It's hard to remain at the trailing edge of technology.


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