Re: [myhdl-list] Module uses globals

[Christopher F. <chr...@gm...>]

<snip>
>>>
>>> This totally defeats the beauty of object orientation in Python. For
>>> example you cannot have two instances of a Simulation() at the same time.
>>
>> What is the rationale for more than one simulation
>> running at a time?  Why have two simulators running?
>>
>
> What is great about having a HDL simulation within a full blown language
> like Python is the possibility of doing unconventional things. Some that I
> can think of are, first, running a same model in delayed and asynchronous
> versions, with a controlled, time varying delay and comparing states.

Sure, folks have experiment with aysnc simulations before
but did not require two simulation instances.

> Another is bifurcation, this is, generating a copy of a model and
> simulation at some time instant and comparing the two based on some
> asymmetry, potentially generating copies throughout the simulation and
> discarding them when not needed. Things like this are useful in stability
> analysis of non-linear mixed-signal circuits.
>

You can still break up the design, typically the testbench
and models have a lot going on independent of the design.
I still don't see the need for two simulation instances?

I can simulate two complete unrelated designs at the same
time but in the same Simulation instance.  I am not
understanding the need for multiple simulation instances.

Regards,
Chris