[PTLsim-devel] Tuning PTLsim to fit certain microarchitecture

Mon Nov 5 16:03:58 EST 2007

Hi again,
   I was wondering how the PTLsim team did tune PTLsim to closely 
match the performance of a K8 core. After all there are fairly big 
differences in the exact pipeline layout and tweakable parameters 
between the architectures.

I'm asking because I would like to model a Family 10h 
microarchitecture in PTLsim, or at least something that comes 
reasonably close.

With my slightly tweaked K8-based model I still get performance about 
40% worse, more or less correctly resembling a K8 architecture. (At 
least for the given workload!)

I understand that I should have a more detailed view at the 
micro-architecture, but I'm wondering in general about the process of 
fitting a given micro-architecture to PTLsim from the publically 
known data (Software Optimisation Guide and other public K10 
microarchitecture overviews).

Many thanks for pointers!

Yours, 
  Stephan
-- 
Stephan Diestelhorst, AMD Operating System Research Center
stephan.diestelhorst at amd.com, Tel. 