x86-64 on i386 (was Re: Promoting i386 version over x86_64?)

Paul Jakma paul at dishone.st
Mon Dec 14 18:17:10 UTC 2009


On Mon, 14 Dec 2009, Adam Williamson wrote:

> On Mon, 2009-12-14 at 12:33 +0000, Paul Jakma wrote:
>
>> You're missing the point.
>>
>> If I put you in front of 2 identical machines, one running 32bit and
>> one 64bit software, would you be able to tell which one was which,
>> from the interactive performance of common applications? I'd be
>> willing to bet that for the vast majority of applications you
>> wouldn't be.

> That's a silly argument, because it simply relies on the fact that most
> uses of computers aren't CPU-bound at all. In the same way I could
> probably steal half the RAM from your system and clock the CPU down 50%
> (the BOFH's favourite revenue-generating technique!) and from 'the
> interactive performance of common applications' you wouldn't be able to
> tell the difference. I don't think that _means_ very much, though.

It's quite meaningful, e.g. for power conservation. As you no doubt 
are aware of, modern system regularly clock down the CPU.

regards,
-- 
Paul Jakma	paul at jakma.org	Key ID: 64A2FF6A
Fortune:
It occurred to me lately that nothing has occurred to me lately.




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