Re: [Gems-users] Tracing TLB Misses

[nikolaos@xxxxxxxxxx]

Thanks Luke,

I will try the C code solution as I need both modules loaded.

Regards,
Nikolas

Quoting Luke Yen <lyen@xxxxxxxxxxx>:

> Hi Nikolas,
> 
>   The way to do this is to register an exception callback so that Simics
> can inform you whenever it is about to take an exception, and when
> the exception completes:
> 
>     SIM_hap_register_callback("Core_Exception", (cb_func_no_t)
> ctrl_exception_start, (void *) NULL);
>   SIM_hap_register_callback("Core_Exception_Return", (cb_func_no_t)
> ctrl_exception_done, (void *) NULL);
> 
>    You can do this using a Python script (independent of Opal or Ruby,
> useful if you just want to profile without loading those modules). or do
> this using C code in Ruby or Opal.
> 
>   Then Simics will call ctrl_exception_start() before each exception
> (including TLB),
> and ctrl_exception_done() after each exception completes.  Arguments for
> the callback functions are:
> 
>   void ctrl_exception_start(void* desc, void* cpu, integer_t val)
> 
>   where val is the exception number.  Again you can implement the callback
> functions in python or C code.
> 
>   Regards,
>   Luke
> 
> On Mon, 20 Nov 2006 nikolaos@xxxxxxxxxx wrote:
> 
> >
> >
> > Hi all,
> >
> > I need to trace TLB misses (both D-TLB and I-TLB), and searching through
> the
> > source code I found the pseq_t::postException function. Would it be correct
> to
> > use this function to trace when the Fast_Data_Access_MMU_Miss (0x68) and
> > Fast_Instruction_Access_MMU_Miss (0x64) exceptions happen? Is
> postException
> > called for all exceptions that happen in Opal-Ruby?
> >
> > Thanks a lot,
> >
> > Nikolas Galanis
> > _______________________________________________
> > Gems-users mailing list
> > Gems-users@xxxxxxxxxxx
> > https://lists.cs.wisc.edu/mailman/listinfo/gems-users
> > Use Google to search the GEMS Users mailing list by adding
> "site:https://lists.cs.wisc.edu/archive/gems-users/"; to your search.
> >
> _______________________________________________
> Gems-users mailing list
> Gems-users@xxxxxxxxxxx
> https://lists.cs.wisc.edu/mailman/listinfo/gems-users
> Use Google to search the GEMS Users mailing list by adding
> "site:https://lists.cs.wisc.edu/archive/gems-users/"; to your search.
>