Wish: Variable Not Used Warning

BCS ao at pathlink.com
Fri Jul 11 10:10:50 PDT 2008


Reply to Markus,

> On Fri, 11 Jul 2008 04:17:13 +0000, Markus Koskimies wrote:
> 
>> I'll read that later.
>> 
> I read it. It's all about the well-known barrier between porcessors,
> memories (RAM) and disks, and the necessarity of
> 

The spesific effect I was talking about is not in the slides. If you havn't 
seen the video, you didn't see the part I was refering to.


int[1000] data;

thread 1:
   for(int i = 1000_000); i; i--) data[0]++;

thread 2a:
   for(int i = 1000_000); i; i--) data[1]++;

thread 2b:
   for(int i = 1000_000); i; i--) data[999]++;


On a multi core system run thread 1 and 2a and then run 1 and 2b. You will 
see a difference.





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