Re: Intel P6 vs P7 system call performance

Dave Jones
2002-12-09T19:32:06Z

On Mon, Dec 09, 2002 at 05:48:45PM +0000, Linus Torvalds wrote:

> P4's really suck at system calls. A 2.8GHz P4 does a simple system call
> a lot _slower_ than a 500MHz PIII.
>
> The P4 has problems with some other things too, but the "int + iret"
> instruction combination is absolutely the worst I've seen. A 1.2GHz
> Athlon will be 5-10 times faster than the fastest P4 on system call
> overhead.

Time to look into an alternative like SYSCALL perhaps ?

Dave

--
| Dave Jones. http://www.codemonkey.org.uk
| SuSE Labs