Re: [Gems-users] defining new actions in *.sm file

["Dave Z." <zhu_dave@xxxxxxxxx>]

In commands.C where magic instruction callbacks are
defined, I couldn't see how the following functions
interact with the cache controller. 

g_system_ptr->getProfiler()->startTransaction(SIMICS_current_processor_number());

or

 XACT_MGR-beginTransaction(id);

These functions seem to call the profiler or do some
operations related with the profiler, not the cache
controller. I couldn't see any calls to the cache
controller. Am I looking at the wrong place?

Thanks,

Dave


--- Mike Marty <mikem@xxxxxxxxxxx> wrote:

> Yes, its doable.  The LogTM code uses magic
> instructions to tell the cache
> controllers when a transaction starts and ends.  
> 
> Your magic instruction will call the Sequencer which
> then enqueues a special
> CacheMsg to the mandatory queue of the L1
> controller.  
> 
> > -----Original Message-----
> > From: gems-users-bounces@xxxxxxxxxxx
> [mailto:gems-users-
> > bounces@xxxxxxxxxxx] On Behalf Of Dave Z.
> > Sent: Wednesday, October 11, 2006 9:24 PM
> > To: Gems Users
> > Subject: Re: [Gems-users] defining new actions in
> *.sm file
> > 
> > Thanks for your reply, Mike. I can make a
> transition that only executes my
> > action but the problem is I want that transition
> to take place when a
> > certain point (e.g. magic instruction) has been
> reached in the program. Is
> > this not doable? Basically the idea is to inform
> the cache controller that
> > it's time to prefetch some data. Thanks for your
> help.
> > 
> > ----- Original Message ----
> > From: Mike Marty <mikem@xxxxxxxxxxx>
> > To: Gems Users <gems-users@xxxxxxxxxxx>
> > Sent: Wednesday, October 11, 2006 5:34:31 PM
> > Subject: Re: [Gems-users] defining new actions in
> *.sm file
> > 
> > Make a transition that only executes your action
> and nothing else.
> > 
> > > -----Original Message-----
> > > From: gems-users-bounces@xxxxxxxxxxx
> [mailto:gems-users-
> > > bounces@xxxxxxxxxxx] On Behalf Of Dave Z.
> > > Sent: Wednesday, October 11, 2006 6:30 PM
> > > To: Gems Users
> > > Subject: Re: [Gems-users] defining new actions
> in *.sm file
> > >
> > > I see what you mean. But I just want some action
> to
> > > get executed by the cache controller when a
> particular
> > > magic instruction is called in the program, not
> when a
> > > transition takes place. Is there a way to work
> around
> > > this problem? Any ideas? Thanks.
> > >
> > > DZ
> > >
> > > --- Greg Byrd <gbyrd@xxxxxxxx> wrote:
> > >
> > > >
> > > > You can't "call" an action.  Actions happen as
> a
> > > > result of a
> > > > transition.  And transitions happen
> > > > as a result of an event.  To cause your cache
> > > > component to wake up and
> > > > do something,
> > > > you need to schedule an event.
> > > >
> > > > ...gb
> > > >
> > > >
> > > > Dave Z. wrote:
> > > > > Hello,
> > > > >
> > > > > Here is what I'm planning to do to send
> requests
> > > > from
> > > > > a program to Ruby cache controller. Please
> correct
> > > > me
> > > > > if I'm wrong.
> > > > >
> > > > > - I'll define a magic instruction in
> commands.C.
> > > > This
> > > > > instruction will be called in the program.
> > > > > - I'll define an action in *.sm file This
> action
> > > > will
> > > > > be handled when the magic instruction is
> called.
> > > > >
> > > > > My question is: how should I define the
> action in
> > > > > commands.C so that it's get called when the
> magic
> > > > > instruction is called? For example, if my
> action's
> > > > > name is aa_myAction, would it work if I do
> the
> > > > > following in commands.C?
> > > > >
> > > > > else if (val == 61) { // my magic number
> > > > >   printf("My magic instruction\n");
> > > > >   L1Cache_Controller::aa_myAction;
> > > > > }
> > > > >
> > > > >
> > > > >
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