Just found out: Even a "moderatly" sized (600MB) .ghw file uses almost 8GB of RAM when loaded into gtkwave. Super weird. No wonder that I couldn't load my earlier .ghw file that was 6GB. If that scales linear it would've taken 80GB of RAM!
2016-04-24 14:27 GMT+02:00 Lehmann, Patrick <patrick.lehm...@tu-dresden.de>: > 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 > > _______________________________________________ > 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
