That works.
Thanks,
Niket
----- Original Message ----- From: Mike Marty <mike.marty@xxxxxxxxx> Date: Friday, July 4, 2008 10:15 am Subject: Re: [Gems-users] Adapting SMP directory protocol to model private L2 CMP protocol To: Gems Users <gems-users@xxxxxxxxxxx>
> > I want to evaluate a private L2 CMP directory protocol in GEMS. > Looking at > > some of the previous discussion it seems that lowering the > network latencies > > and using an SMP protocol could mimic a private L2 CMP protocol. > > > > My concern is that this would not model an on-chip directory > cache. If I > > specify the directory link latency to be 200 cycles (to model > off-chip > > memory), every check of the sharing vectors would incur an off- > chip 200 > > cycle access. > > >
> You can add a directory cache to MOESI_SMP_directory-dir.sm. Just > modifythe actions to check for a directory cache hit and use a > different latency > value if you hit. > > > > > > Am I correct? How have private L2 configurations been previously > evaluated> inside Gems? > > > > Yes they have. > > With private L2s, you can't really store directory state in the L2 > tags. > --Mike >
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