Hello Stefan,
can you give an example of such a file?
Is it slow because of the signal count or because of the runtime / event count.
Currently GHDL dumps every signal. Maybe it's possible to reduce the signal count by specifing the signals for dumping in the future. Could this help?
Regards
Patrick
Wissenschaftliche Hilfskraft
Technische Universität Dresden
Fakultät Informatik
Institut für Technische Informatik
Lehrstuhl VLSI-Entwurfssysteme, Diagnostik und Architektur
01062 Dresden, GERMANY
Tel.: +49 351 463-38451 Fax: +49 351 463-38324
E-Mail: patrick.lehm...@tu-dresden.de
WWW: http://vlsi-eda.inf.tu-dresden.de
-------- Ursprüngliche Nachricht --------
Von: Stefan Dröge
Datum:24.04.2016 04:43 (GMT+01:00)
An: GHDL discuss list
Betreff: Re: [Ghdl-discuss] Improved '.fst' file format for VHDL
Yes, I know of the .ghw format. (That is what I am using at the moment).
However, for large waveform dumps, the .ghw format is terribly slow to
the point were it is unusable.
2016-04-24 1:10 GMT+02:00 Lehmann, Patrick <patrick.lehm...@tu-dresden.de>:
> Hello Stefan,
>
> if you need more features in the exported waveform database files, there is
> also the *.ghw (GHDL wave) format, which is also supported by GTKWave.
>
> ghdl -r ..... --wave=waveform.ghw
>
> Regards
> Patrick
>
> -----------------------------------
> Wissenschaftliche Hilfskraft
> Technische Universität Dresden
> Fakultät Informatik
> Institut für Technische Informatik
> Lehrstuhl VLSI-Entwurfssysteme, Diagnostik und Architektur
> 01062 Dresden, GERMANY
> Tel.: +49 351 463-38451 Fax: +49 351
> 463-38324
> E-Mail: patrick.lehm...@tu-dresden.de
> WWW: http://vlsi-eda.inf.tu-dresden.de
>
> -------- Ursprüngliche Nachricht --------
> Von: Stefan Dröge
> Datum:24.04.2016 00:15 (GMT+01:00)
> An: ghdl-discuss@gna.org
> Betreff: [Ghdl-discuss] Improved '.fst' file format for VHDL
>
> Some changes/additions were recently made to gtkwave's .fst file
> format, which can now also support 9 value logic, and special VHDL
> types like records, etc. (see gtkwave manual page 21).
>
> Since the .fst file format shows better performance for larger
> waveform dumps, it would be very useful if these changes could be
> included in GHDL. For the implementation it might be interesting to
> have a look at https://github.com/nickg/nvc/blob/master/thirdparty/fstapi.c
> (I could not find any information on the fst format directly from the
> gtkwave website, besides the user manual)
>
> Lastly, since I am new to the mailing list, let me say a big "thank
> you!" to the Tristan and the other contributers. I am using ghdl
> extensively for my master thesis project. I am writing a GPS receiver
> in VHDL, including a MBlite Softcore CPU (a microblaze variant), and I
> am doing my simulations exclusively in GHDL. I especially like the
> performance of ghdl and that it is very pedantic about the LRM. My
> life would be several orders of magnitudes harder without GHDL.
>
> _______________________________________________
> Ghdl-discuss mailing list
> Ghdl-discuss@gna.org
> https://mail.gna.org/listinfo/ghdl-discuss
>
> _______________________________________________
> Ghdl-discuss mailing list
> Ghdl-discuss@gna.org
> https://mail.gna.org/listinfo/ghdl-discuss
>
_______________________________________________
Ghdl-discuss mailing list
Ghdl-discuss@gna.org
https://mail.gna.org/listinfo/ghdl-discuss
However, for large waveform dumps, the .ghw format is terribly slow to
the point were it is unusable.
2016-04-24 1:10 GMT+02:00 Lehmann, Patrick <patrick.lehm...@tu-dresden.de>:
> Hello Stefan,
>
> if you need more features in the exported waveform database files, there is
> also the *.ghw (GHDL wave) format, which is also supported by GTKWave.
>
> ghdl -r ..... --wave=waveform.ghw
>
> Regards
> Patrick
>
> -----------------------------------
> Wissenschaftliche Hilfskraft
> Technische Universität Dresden
> Fakultät Informatik
> Institut für Technische Informatik
> Lehrstuhl VLSI-Entwurfssysteme, Diagnostik und Architektur
> 01062 Dresden, GERMANY
> Tel.: +49 351 463-38451 Fax: +49 351
> 463-38324
> E-Mail: patrick.lehm...@tu-dresden.de
> WWW: http://vlsi-eda.inf.tu-dresden.de
>
> -------- Ursprüngliche Nachricht --------
> Von: Stefan Dröge
> Datum:24.04.2016 00:15 (GMT+01:00)
> An: ghdl-discuss@gna.org
> Betreff: [Ghdl-discuss] Improved '.fst' file format for VHDL
>
> Some changes/additions were recently made to gtkwave's .fst file
> format, which can now also support 9 value logic, and special VHDL
> types like records, etc. (see gtkwave manual page 21).
>
> Since the .fst file format shows better performance for larger
> waveform dumps, it would be very useful if these changes could be
> included in GHDL. For the implementation it might be interesting to
> have a look at https://github.com/nickg/nvc/blob/master/thirdparty/fstapi.c
> (I could not find any information on the fst format directly from the
> gtkwave website, besides the user manual)
>
> Lastly, since I am new to the mailing list, let me say a big "thank
> you!" to the Tristan and the other contributers. I am using ghdl
> extensively for my master thesis project. I am writing a GPS receiver
> in VHDL, including a MBlite Softcore CPU (a microblaze variant), and I
> am doing my simulations exclusively in GHDL. I especially like the
> performance of ghdl and that it is very pedantic about the LRM. My
> life would be several orders of magnitudes harder without GHDL.
>
> _______________________________________________
> Ghdl-discuss mailing list
> Ghdl-discuss@gna.org
> https://mail.gna.org/listinfo/ghdl-discuss
>
> _______________________________________________
> Ghdl-discuss mailing list
> Ghdl-discuss@gna.org
> https://mail.gna.org/listinfo/ghdl-discuss
>
_______________________________________________
Ghdl-discuss mailing list
Ghdl-discuss@gna.org
https://mail.gna.org/listinfo/ghdl-discuss
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