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Julia receives DARPA award to accelerate electronics simulation

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Re: Julia receives DARPA award to accelerate electronics simulation

#171

Post by ViralBShah »

choeger wrote: post #87

Maybe of interest in that context: https://github.com/ModiaSim/Modia.jl The authors of that tool have a strong background in modeling and simulation of differential algebraic equations. Not so much in designing DSLs, though, so there maybe some technical oddities. But I expect the simulation aspect to be quite decent.

Modia.jl is built by Hilding Elmquist, Martin Otter and their collaborators. These are some of the best folks in the world - Hilding's thesis in 1978 described equation oriented modeling. It had to wait until computers became powerful enough in the 90s to become broadly usable.

https://people.inf.ethz.ch/fcellier/Res/Soft/Dymola_engl.htm...

We've had the benefit of learning from them and their presentations at JuliaCon and collaborating. More is coming. In the meanwhile - do see this JuliaCon talk by Hilding:

https://www.youtube.com/watch?v=hVg1eL1Qkws

Re: Julia receives DARPA award to accelerate electronics simulation

#172

Post by stjohnswarts »

toomuchtodo wrote: post #150
stjohnswarts wrote: post #149

Earlier quoted context omitted.

I had to leave a company over that. I had made a personal fpga construct generator for various easily parameterizable modules. It worked pretty well but it was a mess and needed to be redone pretty badly, but it was good enough. I shared it upon request with a couple of engineers and before I knew it there were probably 25 EEs using it. They wanted "more" and I told them it was a personal tool and they were more than…

If they didn't lay claim to the IP, you should polish it and offer it for sale, or use it as interview material at someplace developing similar technology.

Oh the creation of modules has gotten much better with languages like SystemVerilog and SystemC :) . What I did was a very rudimentary effort in perl (later ported it to python). Kind of like people look like "excel gods" at some company when they take some mundane manual tasks and do some excel scripting and take a 3 day job down to 15 minutes. I just happened to be the only EE with the soul of a coder while I was there. I was under very heavy NDA at the time, I'm sure others were doing the same at their companies. tldr; it wasn't anything special and is much more common these days. Basically it eliminated a ton of copy-pasta and manual editing.

Re: Julia receives DARPA award to accelerate electronics simulation

#173

Post by kbr2000 »

multiply wrote: post #127
kayson wrote: post #115

Earlier quoted context omitted.

It's an absolute nightmare. Cadence added support for Matlab calculations on simulator outputs, but its clunky and inconsistent. Don't even get me started on how long it takes to do basic calculations on numbers that should already be in memory...

My worst experience was doing a simple min/max of each signal took 7x longer than the simulation. I'd be so happy to toss TCL in the trash. I spent a long time debugging because TCL expr doesn't do -2^2 correctly. The error messages don't tell you the line number and I found no good way to debug. Things like that are just the tip of the iceberg of time wasted fighting with arcane tools. I suppose others have their ow…

In Tcl's expr:

^ stands for bitwise XOR: so [expr {-2^2}] results in -4

* stands for exponentiation: so [expr {-2*2}] results in 4

Both seem correct to me, taking into account how integers are represented in binary (two's complement for the negative ones).

With regards to debugging dynamic programming languages, it is different as compared to their static counterparts, since much is delayed to happen at runtime (as opposed to at compilation time). But it also opens up possibilities (like introspection, ability to intervene in the scripts while they run, ...). It requires a different mindset.

Re: Julia receives DARPA award to accelerate electronics simulation

#174

Post by kbr2000 »

kbr2000 wrote: post #173
multiply wrote: post #127

Earlier quoted context omitted.

My worst experience was doing a simple min/max of each signal took 7x longer than the simulation. I'd be so happy to toss TCL in the trash. I spent a long time debugging because TCL expr doesn't do -2^2 correctly. The error messages don't tell you the line number and I found no good way to debug. Things like that are just the tip of the iceberg of time wasted fighting with arcane tools. I suppose others have their ow…

In Tcl's expr: ^ stands for bitwise XOR: so [expr {-2^2}] results in -4 * stands for exponentiation: so [expr {-2*2}] results in 4 Both seem correct to me, taking into account how integers are represented in binary (two's complement for the negative ones). With regards to debugging dynamic programming languages, it is different as compared to their static counterparts, since much is delayed to happen at runtime (as o…

Mmmn, HN stripped out the half of the double asterisks, now I made it confusing myself... Too late to edit my comment above, but it needs to be like this:

** stands for exponentiation: so [expr {-2**2}] results in 4

Re: Julia receives DARPA award to accelerate electronics simulation

#175

Post by blacksqr »

kbr2000 wrote: post #173
multiply wrote: post #127

Earlier quoted context omitted.

My worst experience was doing a simple min/max of each signal took 7x longer than the simulation. I'd be so happy to toss TCL in the trash. I spent a long time debugging because TCL expr doesn't do -2^2 correctly. The error messages don't tell you the line number and I found no good way to debug. Things like that are just the tip of the iceberg of time wasted fighting with arcane tools. I suppose others have their ow…

In Tcl's expr: ^ stands for bitwise XOR: so [expr {-2^2}] results in -4 * stands for exponentiation: so [expr {-2*2}] results in 4 Both seem correct to me, taking into account how integers are represented in binary (two's complement for the negative ones). With regards to debugging dynamic programming languages, it is different as compared to their static counterparts, since much is delayed to happen at runtime (as o…

I've always been astounded that much of the rage against Tcl seems to stem from the fact that it works as documented, rather than according to the rules of other languages.
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