Hi Edward,
1) In configs/example/se.py or fs.py, you can directly manipulate the
parameters.
Find
(CPUClass, test_mem_mode, FutureClass) = Simulation.setCPUClass(options)
And append
CPUClass.branchPred.localCtrBits = 4
Note that FutureClass should be used instead of CPUClass if you're
fast-forwarding or restoring from checkpoint.
That is, if you're switching CPU, then FutureClass is your target.
2) You can control the assigned value (in thus example, 4) using
configs/common/Options.py
Just add your option in the function addCommonOptions like this:
parser.add_option("--bpred-ctr", type="int", default=2)
And reference the command-line passed value like this:
CPUClass.branchPred.localCtrBits = options.bpred_ctr
Best regards,
Jae-Eon
2014-09-22 9:47 GMT+09:00 Edward HUANG via gem5-users <gem5-users@gem5.org>:
> Hi there,
> I'm new to gem5, and I'm now trying to analyze the influence of number
> of bits in saturating counter for a branch predictor (for my course
> project).
> Is there any way to pass the number of bits as a parameters via command
> line? Or I will have to hard coded it inside source files like
> *src/cpu/pred/bi_mode.cc* or *src/cpu/pred/tournament.cc*?
>
> Edward ZILONG HUANG
> MS@ECE department, Carnegie Mellon University
> http://www.andrew.cmu.edu/user/zilongh/
>
> _______________________________________________
> gem5-users mailing list
> gem5-users@gem5.org
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