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

[Philip Garcia <pcgarcia@xxxxxxxx>]

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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