3x for your response, I am a software developer in field of industrial
control system. These systems require hard real-time support, even
exact temporal behavior. The cache is a major source of uncertainty,
is it necessary to disable cache for some critical hard real-time
tasks? I am looking forward to your professional adivce.
3x
regards arethe
2011/3/6 Philippe Gerum :
> On Sun, 2011-03-06 at 14:05 +0800, arethe rtai wrote:
>> Hello:
>> As known, cache can accelerate the memory access, but
>> unfortunately, it would decrease the predictability of real-time tasks'
>> temporal behaviour. Many tasks of our application prefer
>> predictability to the speed of execution. Intel's processors after P6
>> include MTRR and PAT, both the two units can be used to bypass the
>> cache.
>> I wonder whether Xenomai can bypass the cache, and whether Xenomai
>> can manage the MTRR or PAT?
>
>
> No.
>
>> If the answers are true, how to use the
>> function?
>> 3x
>> arethe
>>
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>
> --
> Philippe.
>
>
>
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