Re: Intel P6 vs P7 system call performance

From: H. Peter Anvin (hpa@transmeta.com)
Date: Thu Dec 19 2002 - 17:17:11 EST


Pavel Machek wrote:
>>
>>Different thing - int 0x80 syscall not i/o port 80. I've done I/O port
>>80 (its very easy), but requires we set up some udelay constants with an
>>initial safety value right at boot (which we should do - we udelay
>>before it is initialised)
>
> Actually that would be nice -- I have leds on 0x80 too ;-).
> Pavel

We have tried before, and failed. Phoenix uses something like 0xe2, but
apparently some machines with non-Phoenix BIOSes actually use that port.

        -hpa

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



This archive was generated by hypermail 2b29 : Mon Dec 23 2002 - 22:00:24 EST