On 3/15/2023 11:11 PM, yuxuan-z via gem5-users wrote:
To: Whom it may concern
I have been using this simulator for some processor related educational projects. I noticed a
drastically slower performance in simulation as compared to the real thing. To my knowledge, there
are no parallelization features included in the simulator as mentioned in this issue
https://github.com/cirosantilli2/gem5-issues/issues/15
<https://github.com/cirosantilli2/gem5-issues/issues/15> . I am writing to enquire are there any
such features that I am not aware of or are there any plans to include parallelization features into
future versions. Hope to hear from you soon.
Dear Harry -
It's extremely difficult to parallelize code of this kind. I
believe one would essentially have to undertake a total rewrite
based on a somewhat different approach. It would also introduce
(more) non-determinism.
I am reminded of failed efforts to replace the global lock in the
most widely used version of python (the one written in C). And
that code base is much smaller than gem5.
The useful parallelism I *have* achieved is doing different runs
(varying parameters, workloads, etc.) concurrently in different
Linux processes.
Regards - Eliot Moss
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