Doubts About Cache Manager Routines

[Thomas Doerfler (nt)]

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Naufal,

Am 05.04.2011 21:35, schrieb Mohamed Naufal:
> On 6 April 2011 00:49, Thomas Doerfler (nt)
> <Thomas.Doerfler at imd-systems.de> wrote:
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>> Naufal,
>>
>> maybe using a local (stack) variable as a test target is not really a
>> good idea, because you will _always_ hit stuff in the neighbourhood.
>> Your analysis is totally to the point regarding the effects you have.
>>
>> A proper way may include:
>> - - allocate a cache-aligned chunk of memory (e.g. from the heap, using
>> malloc() ).
>> - - use this location as your test area.
>>
> 
> But wouldn't the same problem arise when I use
> invalidate_entire_data()? This is particularly relevant since i386
> doesn't support selective invalidation.

ups, yes you are right. I am not so familiar with the i386 cache
architecture. If an invalidate ist only possible for the complete data
cache, testing this will become tricky :-(

wkr,
Thomas.
> 
> Thanks
> Naufal


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