Hi everyone,
I am quite new at gem5 (I've barely run some simulations) and I have to
implement a full system which requires some parametrization of the CPU, caches
and so on. I will sum up very shortly what I intend to do:
- CPU: I want to simulate a superscalar processor (I am already aware of
o3) which is able to run 2 threads in each core, with a total of 2 cores.
- Memory Hierarchy: There are 3 cache levels; 1st level is shared among
threads within one core (2 threads as mentioned before); same with L2. L3 is
shared between the two cores.
- I am trying not to use fs.py, i rather have one custom file than using
an already existing script with a large amount of comandline options and flags.
So far, I have decided to use Ruby with MESI_Three_Level in order to simulate
the memory hierarchy, and as I said, I am using o3 since it is the only
superscalar cpu model in gem5. However, I am not sure how to configure these
objects... I have basically two questions:
1. Is SMT "enabled" (implemented) by default on O3? How do I specify the
number of threads per core?
2. Using Ruby, do I need to bind the L1 caches to the cores first, or are
all the caches described in the MESI_Three_Level.* (and two level) files?
I have searched through the mail files, but all the posts I've found regarding
this subject are either not replied or too old (between 5 or 9 years), so...
could someone help me with this?
Thank you in advance,
Ferran O.
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