Re: [myhdl-list] myhdl with cython?

[David B. <da...@be...>]

Just checked

and it seems that it improves performance by roughly 8 times! That is indeed massive and I think I'm around the times I get with modelsim.

belohrad@beesknees:~/git/didt/MyHDL/FIR$ time pypy ./FIR_tb.py 
Working
Loaded  891  coefficients
Done

real    0m19.081s
user    0m16.208s
sys     0m0.640s
belohrad@beesknees:~/git/didt/MyHDL/FIR$ time python ./FIR_tb.py                                                                                                            
Working
Loaded  891  coefficients
Done

real    2m21.629s
user    2m17.020s
sys     0m1.476s
belohrad@beesknees:~/git/didt/MyHDL/FIR$



.d.


Christopher Felton <chr...@gm...> writes:

> On 1/26/2016 2:13 AM, David Belohrad wrote:
>> i've been fiddling with myhdl for about a week or so. I've tried to
>> do some real stuff I do at work using myhdl. As a part of the project
>> involves FIR filtering, I have used the example found on Christopher
>> Felton's page (https://bitbucket.org/cfelton/examples) and hacked
>> away m_firfilt entity using my own coefficients. Now, my filter has
>> 891 taps and I've tried to simulate using a testbench how it reacts
>> on unit-amplitude (it is a bandpass) input signal.
>>
>> It works great, at the same time it takes 'ages'. Simulation of such
>> filter with roughly 5000 clock cycles takes almost 2 minutes. 4 times
>> longer than I do with modelsim (from mentor).
>
> If you haven't seen this page it has some useful information:
> http://www.myhdl.org/docs/performance.html
>
>
>>
>> So I wanted to check, whether it is feasible to use cython for these
>> things. Following
>> http://docs.cython.org/src/tutorial/cython_tutorial.html I hae
>> created the setup and compiled in-the module using build_ext
>> --inplace.
>>
>
> I have not tried cython but I won't be surprised that
> it would fail.  It seems reasonable that you could
> maybe compile only the function
>
> As far as the error posted, it seems the cython changed
> the function somehow but that is just a guess.
>
> Regards,
> Chris
>
>
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