I forot to mention he clusters on either side of bridge have a single physical memory. So essentially there is no communication on the bridge. The purpose is that if the two clusters are running independent two-threaed applications,then coherence and snooping overheads are assumed to be that resulting from two cores rather than four cores.
---- Original message ---- >Date: Fri, 14 Dec 2007 21:35:23 -0600 (CST) >From: Shoaib Akram <[EMAIL PROTECTED]> >Subject: Re: [m5-users] Clustering/Interconnection Related >To: M5 users mailing list <m5-users@m5sim.org> > >Thanks Steve for the reply. Infact, I dont want coherence across the bus >bridge. It is assumed that clusters either side of bridge are running >independent applcations. So, I want coherence to work accurately on the pair >of two cores rather than across all four cores. This will work right? > >---- Original message ---- >>Date: Fri, 14 Dec 2007 18:50:31 -0800 >>From: "Steve Reinhardt" <[EMAIL PROTECTED]> >>Subject: Re: [m5-users] Clustering/Interconnection Related >>To: "M5 users mailing list" <m5-users@m5sim.org> >> >>You could certainly build this configuration, but the coherence >>protocol will not work transparently across the bus bridge. You'd >>have to adapt the coherence protocol and/or the bridge to make it work >>(just like in the real world). >> >>Steve >> >>On Dec 14, 2007 1:19 PM, Shoaib Akram <[EMAIL PROTECTED]> wrote: >>> I want to simulate the following system: >>> >>> A total of four cores each with L1 private L1 caches. Two cores connected >>> by a shared bus. The other two cores also connected by a shared bus. The >>> two clusters connected together by a point to point link or something. >>> >>> In essence, the goal is to have two separate shared bus fabrics in the >>> system. >>> >>> Any idea how to model this in m5. I know m5 has this bridge mechanism but >>> has anybody used it successfully? >>> >>> Regards, >>> Shoaib >>> _______________________________________________ >>> m5-users mailing list >>> m5-users@m5sim.org >>> http://m5sim.org/cgi-bin/mailman/listinfo/m5-users >>> >>_______________________________________________ >>m5-users mailing list >>m5-users@m5sim.org >>http://m5sim.org/cgi-bin/mailman/listinfo/m5-users >_______________________________________________ >m5-users mailing list >m5-users@m5sim.org >http://m5sim.org/cgi-bin/mailman/listinfo/m5-users _______________________________________________ m5-users mailing list m5-users@m5sim.org http://m5sim.org/cgi-bin/mailman/listinfo/m5-users
