Hey Rick,
you need the set the parameters for the O3CPU inside the se.py file or
whatever file you are using to configure the simulation.
But say you are using se.py, then you need to configure the O3CPU once
the O3CPU is instantiated.
Around line 63 in se.py there is a line that sets up the CPU model:
(CPUClass, test_mem_mode, FutureClass) = Simulation.setCPUClass(options)
The O3CPU is only valid if you selected the 'detailed' option on the
command line so after that line 63, you could edit the file with
something like this:
if options.detailed:
CPUclass.smtNumFetchingThreads = 2
CPUclass.smtFetchPolicy = "branch"
....
The different options for fetch policy, lsq policy, and commit policy
can be found in those implementation files (e.g. fetch_impl.hh,
lsq_impl.hh, commit_impl.hh, etc.), although they should probably be
outlined somewhere in the O3CPU.py for easy use.
Hope that helps!
Korey.
On Oct 29, 2007 2:37 PM, Rick Strong <[EMAIL PROTECTED]> wrote:
> Hi,
>
> I am wondering how to set the parameters in O3CPU.py:
>
> smtNumFetchingThreads = Param.Unsigned("SMT Number of Fetching Threads")
> smtFetchPolicy = Param.String("SMT Fetch policy")
> smtLSQPolicy = Param.String("SMT LSQ Sharing Policy")
> smtLSQThreshold = Param.String("SMT LSQ Threshold Sharing Parameter")
> smtIQPolicy = Param.String("SMT IQ Sharing Policy")
> smtIQThreshold = Param.String("SMT IQ Threshold Sharing Parameter")
> smtROBPolicy = Param.String("SMT ROB Sharing Policy")
> smtROBThreshold = Param.String("SMT ROB Threshold Sharing Parameter")
> smtCommitPolicy = Param.String("SMT Commit Policy")
>
> I want to increase the number of fetching threads, but the parameter
> smtNumFetchingThreads is not accessible in se.py for the DerivO3CPU
> class object. Also, I noticed in the script se.py that if
> options.detailed is set, it checks for ':' in the workload and then
> makes a SMT workload by putting the LiveProcess() elements into a list.
> Is the fact that the cpu process is a list mean the execution model used
> for O3CPU is SMT? Some info on how to set smt parameters, how to know
> when I am actually running SMT, or a script that plays with these
> settings would be great.
>
> -Richard
> _______________________________________________
> m5-users mailing list
> [email protected]
> http://m5sim.org/cgi-bin/mailman/listinfo/m5-users
>
--
----------
Korey L Sewell
Graduate Student - PhD Candidate
Computer Science & Engineering
University of Michigan
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