Hi, I hope that someone can help me, Steve said that to change the policy I
have to extend the cache and put multiple CPU-side ports and then put the
arbitration logic in the cache between those ports. I have seen that this
file /src/mem/cache/BaseCache.py is the configuration file for the cache, so
to add more ports, Do I just need to add a code like this?,
#Before
cpu_side = Port("Port on side closer to CPU")
#After
cpu_side = Port("Port on side closer to CPU")
cpu_side_new = Port("New port")
And another question, where is the source code associated to the cpu_side
port?. Thanks.
On Tue, Oct 14, 2008 at 2:04 PM, Eduardo Olmedo Sanchez
<[EMAIL PROTECTED]>wrote:
> Hello Steve thanks for your answer, yes I have to do something fancier for
> an assignment, can you tell me where is the source code for the policy?,
> I've been looking in the cache code and in the cpu code, but I can't still
> find it. And another one question is it possible to change the policy or do
> that is a complex task?. Thank you.
>
>
> On Fri, Oct 10, 2008 at 5:42 PM, Steve Reinhardt <[EMAIL PROTECTED]> wrote:
>
>> If you want multiple cores to access a single cache, you'll need to put a
>> bus in between them, and the bus arbitration logic will determine the access
>> pattern. Basically it'll be round robin (if they all access at the same
>> time), or FCFS if not.
>>
>> If you want to do something fancier then you could extend the cache to
>> have multiple CPU-side ports and put the arbitration logic in the cache
>> between those ports.
>>
>> Steve
>>
>> On Fri, Oct 10, 2008 at 9:42 AM, Eduardo Olmedo Sanchez <
>> [EMAIL PROTECTED]> wrote:
>>
>>> Hi:
>>>
>>> I have to change the policy that the simulator uses to access to the
>>> cache. And I got several questions for example if there are three cores that
>>> want to acces to the shared cache, what policy is used?, hit first, round
>>> robin..., where is the code of that policy?, and finally is it possible do
>>> this or it's a very complex task?.
>>>
>>> Thank you so much for answer to all my questions, you guys do an
>>> excellent job with this mail list, thanks.
>>>
>>> _______________________________________________
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>>> http://m5sim.org/cgi-bin/mailman/listinfo/m5-users
>>>
>>
>>
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>
>
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