[Gems-users] Adapting SMP directory protocol to model private L2 CMP protocol

["Niket Agarwal (niketa@xxxxxxxxxxxxx)" <niketa@xxxxxxxxxxxxx>]

Hi, 

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. 

Am I correct? How have private L2 configurations been previously evaluated inside Gems?

Cheers,
Niket