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List:       opensuse
Subject:    Re: [opensuse] switch from 32bit opensuse to 64bit
From:       Per Jessen <per () computer ! org>
Date:       2014-03-14 7:30:07
Message-ID: lfub6b$fuo$1 () saturn ! local ! net
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Carlos E. R. wrote:

> On 2014-03-13 15:29, Per Jessen wrote:
>> Carlos E. R. wrote:
> 
> 
>>> But if this happens, it is bad coding. Programs do not need to use
>>> 64 bit variables just because they are available. They can just as
>>> well keep using as small a variable as they really need.
>> 
>> I can assure you it happens.  As Andrey said already, it's about
>> pointers.
> 
> But surely pointers can not be the larger part of the needed storage,
> is it?

I agree it seems unlikely, but because everything has to accomodate a
64bit address, the stack is also suddenly twice as big, for instance. 

>> With a few processes it's no big deal, but 32bit I can run a lot more
>> processes per system than with 64bit. 
> 
> Well, if you have tried the experiment both ways, and the memory
> footprint is bigger, then obviously I believe you :-)

You can also observe it yourself if you have two systems to compare. 


-- 
Per Jessen, Zürich (6.4 °C)
http://www.dns24.ch/ - free dynamic DNS, made in Switzerland.

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