Thanks for the advice, Tushar.
I think deleting it is fine; its a reference counted pointer (or so it
appears to be), so it won't actually be deleted until all references have
been cleared.
At any rate, I did just go ahead and attach an extra id to the flits. Not
terrible.
Thanks!
-Mark
On Tue, Aug 7, 2012 at 5:43 PM, Tushar Krishna <tus...@csail.mit.edu> wrote:
> Hi Mark,
> No sending the same MsgPointer around can cause problems because the NI
> that receives it earlier will send it up to the cache/dir controller which
> will delete it after consuming it.
>
> You could perhaps add some extra bcast_id in the message at the source and
> identify it based on the {source, bcast_id}. Or you could identify it based
> on {source, address} if your protocol ensures that only one broadcast for a
> particular address is on the network at any point of time (guaranteed if
> the broadcast is done by the home node and it blocks all other requests to
> this address till the first broadcast completes and sends ACKs/unblock).
>
> cheers,
> Tushar
>
>
> On Aug 7, 2012, at 6:27 PM, Mark Browning wrote:
>
> > Is it generally safe to send multiple copies of the same
> MsgPointer(ref-counted) around? That is, if a message has multiple
> destinations and it arrives at one, will that destination modify the
> underlying Message in a way which will affect other destinations?
> >
> > Garnet doesn't support multi/broadcasting, so it clones and duplicates
> each multi-destination message, but I'm extending it with a network that
> does support it. Since the Message doesn't have any other unique
> identifier(that I can find), I was hoping to be able to use the pointer
> value to to determine which series of messages in various queues are unique
> and which are "copies", but if I have to .clone() them, that won't work.
> >
> > Any suggestions?
> >
> > -Mark Browning
> > _______________________________________________
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> > gem5-users@gem5.org
> > http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users
>
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