How Can I get modelsim to run faster for simulation rather than something in the Pico second range (time interval)? Are there any other methods for speeding up simulation? It takes 45 minuts to get to 1ms as of now. I want the simulation to run for 20 ms to check on certain counters, timer modules and events. The System Clock runs on 50MHz. And if there is an option will there be any drawbacks. For example missing events etc.? Thanks
Andy wrote: > STARTER EDITION Found a part of the problem... And now of interest: how much lines of code has your design? https://www.altera.com/products/design-software/model---simulation/modelsim-altera-software.html
Yes. That could be a problem. Around 5000 lines as an entire system. I did try simulating as a separate module which is comparatively faster. But there are events which are triggered during the period which needs to be tested. This depends on the other modules in the system.
Would be interesting how Mentor counts the lines. It may be possible to write a script that just replaces the \n\r by whitespaces in source code. For my (unlimited) ModelSim version, sim works significantly slower when logging all signals to the wlf file vs. logging only the relevant signals. Also, when the wlf file is on network storage, this decreases sim speed. Also check the vsim -t option, it determines the resolution of sim (but I don't know if it is speed relevant).
> Also check the vsim -t option, it determines the resolution of sim (but > I don't know if it is speed relevant). But do you have any idea by using vsim -t 10ns would not ignore any events or skip counts during the simulation?
Of course you should use a timing resolution that is suitable for your design. I use -t 1ps for "usual" (50-250 MHz) FPGA designs. You could only check if, by accident, it is set to e.g. fs which may decrease your sim speed.
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