Re: [Gems-users] LxCACHE_TRANSITIONS_PER_RUBY_CYCLE

[Mike Marty <mikem@xxxxxxxxxxx>]

Well it determines how many transitions the L1 Controller will process 
in a cycle.  For certain protocols, it can be used to approximate bank 
contention.  However for any protocol that uses recycle, it is pretty 
much meaningless and should probably be set to a high value.
It is specifically used in L1Cache_Controller::wakeup() in the generated 
L1Cache_Wakeup.C file.
--Mike


Juyoung Jung wrote:
> Dear Gems-Users,
>
>
> Could anyone explain about what the variable 
> "L1CACHE_TRANSITIONS_PER_RUBY_CYCLE" in 
> ruby/config/rubyconfig.defaults means?
> The comment in rubyconfig file says the below:
>
> // Number of transitions each controller state machines can complete 
> per cycle
> // i.e. the number of ports to each controller
> // L1cache is the sum of the L1I and L1D cache ports
>
> The default value is set to 32 for each type of machines such as L1, 
> L2, and Directory. Shoud I set the exact same number as the defined 
> ports for this variable?
> I am worrying about this variable's role because I could ran 
> simulation without modifying this variable.
> Thank you.
>
> Regards,
>
> Young
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