Re: [Gems-users] GEMS: how to find out the frequency of GEMS

[Edward Lee <edwl202@xxxxxxxxx>]

A side but related question for clarification:

If Simics target is set to run for 2GHz and SIMICS_RUBY_MULTIPLIER is
set to 4. Doesn't this mean RUBY will run 0.5 GHz? I am using
latencies for system parameters but when it comes to "x" bytes/cycle
values I was referring to above calculation to come up with the
bytes/second values.

Thanks,

Ed

On Sun, Oct 25, 2009 at 7:38 PM, Philip Garcia <pcgarcia@xxxxxxxx> wrote:
> To dynamically change the latencies, you'll need to redefine a lot of
> the latency parameters.  This can be done, but it would be tricky.
> For instance you'd want to adjust the cache latencies based on what
> speed the CPU is running at.  You'd have to modify different latency
> parameters depending on which protocol you're using.  Things will be
> even trickier if you are using a memory controller model.  I think
> there might be some parameters for clock ratio that you could adjust
> which would make things easier.  Basically, to do what you want it'll
> require some non-insignificant hacks into ruby.
>
> Phil
> On Oct 25, 2009, at 4:58 PM, Sowmyalatha Srinivasmurthy wrote:
>
>> I intend to dynamically change frequency in GEMS.
>> Is it possible? In case it is how do we do that?
>>
>> Thank you
>> Regards
>> Sowmya
>>
>>> Frequency is set in Simics. I'm not sure what you're asking here:
>>> "n case
>>> it
>>> does then can we see the change in the frequency scaled by a
>>> factor in GEMS?", please clarify.
>>>
>>> Polina
>>>
>>> On Fri, Oct 23, 2009 at 3:26 PM, Sowmyalatha Srinivasmurthy <
>>> sowmya@xxxxxxxxxxx> wrote:
>>>
>>>> Hi,
>>>>
>>>> A few questions related to the frequency at GEMS operates.
>>>>
>>>> How do we find the frequency at which GEMS is running?
>>>> Does it depend on the frequency set in SIMICS via the check point?
>>>> In case it does then can we see the change in the frequency scaled
>>>> by a
>>>> factor in GEMS?
>>>> Otherwise how do we change the frequncy of GEMS to a particular
>>>> frequency
>>>> we need to operate at?
>>>>
>>>>
>>>> Regards,
>>>> Sowmya
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>>>>
>>>>
>>>
>>
>>
>> Regards,
>> Sowmya
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>
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