Re: [Gems-users] Regd using externally declared enumerations in the slicc files

[Brinda Ganesh <brinda_ganesh@xxxxxxxxx>]

Thanks Mike... 
Brinda

--- Mike Marty <mikem@xxxxxxxxxxx> wrote:

> > Thanks!! I noticed that there is a way to specify
> the
> > ratio of the speed at which RUBY runs wrt OPAL. Is
> > there any way to find out what the absolute
> frequency
> > at which OPAL runs?
> >
> 
> You can set a multiplier for the OPAL/SIMICS clock. 
> It is in
> $GEMS_ROOT/ruby/config/rubyconfig.defaults
> 
> Here is a quote from an answer to a similar
> question:
> 
> "The OPAL_RUBY_MULTIPLIER is simply a frequency
> multiplier between Ruby's
> and Opal's frequencies. If you set it to 1, Opal and
> Ruby have the same
> frequency, higher Opal will have a faster frequency.
> The multiplier was
> added as a performance enhancement. The assumption
> is Opal needs a high
> frequency to model a fast out-of-order processor,
> but Ruby can use a lower
> frequency because it models the relatively slow
> memory system. Since Ruby
> is an eventqueue driven simulator, having a slower
> frequency in Ruby
> results in less 'wakeup' cycles and thus reduces
> simulation time. However,
> when using a non-unit multiplier, you need to
> remember the relation when
> analyzing the stats. "
> 
> Now Simics has a notion of clock frequency as well
> to determine things
> like real-time interrupts and such.
> 
> --Mike
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