Re: [Gems-users] regd ruby results and magic instruction

[Dan Gibson <degibson@xxxxxxxx>]

Dave Z. wrote:
> --- Dan Gibson <degibson@xxxxxxxx> wrote:
>
>   
> > Dave Z. wrote:
> >     
> > > Hello All,
> > >
> > > I have a few questions regarding Ruby results and
> > > magic instruction. In my configuration, there are
> > >       
> > two
> >     
> > > processors. For example, total_misses is shown as
> > > follows: total_misses: 39269 [39269 0]. Does each
> > > number in brackets refer to a processor? 
> > >       
> > Yes, each bracket refers to a processor. In your
> > example above, 
> > processor 0 had 39,269 L2 misses, processor 1 had
> > zero.
> >     
> > > If so, does
> > > it mean the benchmark ran only on one of the
> > > processors? 
> > >       
> > Not necessarily -- it means that Ruby didn't find
> > any misses from that 
> > processor...which probably means that Ruby isn't
> > fully installed. Are 
> > you using the "sarek" target? 
> >     
> Yes, I'm using the sarek target w/ solaris 10.
>
>   
Good.
> > Using non-sarek
> > targets or even sarek 
> > targets with some configuration options set can
> > result in more than on 
> > physical memory object (often one per processor).
> > Ruby installs itself 
> > of "phys_mem0", which can manifest as only showing
> > accesses from cpu0. 
> > Find out if a "phys_mem0" object exists in your
> > simulation, and also a 
> > "phys_mem1", "phys_mem2", etc.
> >     
> There exists only phys_mem0 object. What do I need to
> do to have phys_mem1? Perhaps private L1 cache and
> shared L2 cache? I would like to see memory accesses
> from each processor. 
>
>   
You DON'T want separate phys_mems...it just complicates things.
> > Otherwise, have you set the cpu-switch-time in
> > Simics to 1? 
> >     
> No, I haven't. The current CPU switch time is 1000000
> cycles.
>
>   
THAT is the problem then. Simics is running for very few instructions 
and isn't even running processor 1 at all during your benchmark. Use 
cpu-switch-time 1 (and simulate for at least 1000000 cycles to allow the 
switch to occur) and your problem will go away.
> > You might 
> > have a very large cpu-switch-time and/or cpu1 might
> > be in a disabled state.
> >     
> How do I enable cpu1? Isn't it done automatically when
> I set g_NUM_PROCESSORS to 2?
>   
IF cpu1 was disabled for some reason, you could enable it with:
cpu1.enable-processor. However, your problem is the cpu-switch-time (see 
above)
> Thank you for your help.
>
> __________________________________________________
> Do You Yahoo!?
> Tired of spam?  Yahoo! Mail has the best spam protection around 
> http://mail.yahoo.com 
> _______________________________________________
> 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.
>
>   
--
http://www.cs.wisc.edu/~gibson [esc]:wq!