Re: [Gems-users] Change in cpu frequency - question

[Pradeep Ramachandran <pramach2@xxxxxxxx>]

I used the pointer given by Dan to reset the stick_cmpr registers from  
simics, and this masks out the Timer interrupt (thanks for the pointer  
Dan!). However, I just want to make doubly sure that there isn't  
something else that I should be doing that I'm not. If you can paste  
the snippet of code that you guys use, it would be very useful for me  
to cross-check.
Thanks,
Pradeep.

On Feb 7, 2010, at 2:19 PM, Philip Garcia wrote:

> I can look up the hack we use, however I can't really guarantee it  
> will work for you.  I'm using GEMs on a bagle target machine which  
> is based on an UltraSparc II processor, and not a III.  I'll try to  
> post some code later tonight or tomorrow.
> Phil
> On Feb 7, 2010, at 2:05 PM, Pradeep Ramachandran wrote:
>
> > On Feb 6, 2010, at 7:00 PM, Philip Garcia wrote:
> >
> > > You can get around the 75MHz clock issue by stalling the timer  
> > > interrupts  until you want them.  This can be done by manipulating  
> > > the tick and tick compare register so that it goes off at  
> > > specified times.
> > I have been digging around to find information on the tick and tick  
> > compare registers (%stick and %stick_cmpr), but I have found hardly  
> > any info (even the SPARCV9 manual doesn't list them!). Do you have  
> > any pointers on how the registers are used? As I'd mentioned  
> > before, I would like to make the timer interrupts less frequent so  
> > that I simulate a 2GHz-like balanced machine with the 75MHz simics  
> > system, for which I need to make timer interrupts far less frequent.
> > Thanks,
> > Pradeep.
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