Mentor speeds up Eldo with a new version called Eldo Premier
- Thread starter Daniel Payne
- Start date
Here are my comments on eldo premier since I am using it to death these days ...
a) It is about ~16% faster than the normal eldo simulator on a single core run.
b) When multi-cores are engaged, it is ~30% faster than a normal eldo run. This is mainly because it is better at utilizing the cpu cores.
accuracy is pretty good I would say ... though I have yet to dig into the differences between the 2 sims I did.
One thing that I am missing in eldo premier is the noise transient simulation. This differenting feature of eldo is not available.
I can only compare within eldo as I don't have access to the other simulators. I would be intrigued to see how it compares to BDA.
a) It is about ~16% faster than the normal eldo simulator on a single core run.
b) When multi-cores are engaged, it is ~30% faster than a normal eldo run. This is mainly because it is better at utilizing the cpu cores.
accuracy is pretty good I would say ... though I have yet to dig into the differences between the 2 sims I did.
One thing that I am missing in eldo premier is the noise transient simulation. This differenting feature of eldo is not available.
I can only compare within eldo as I don't have access to the other simulators. I would be intrigued to see how it compares to BDA.
Daniel Payne
Moderator
Thanks for the real feedback on your experience with Eldo Premier.
I'm wondering how the 2.5X to 20X faster reported by Mentor isn't what you see at only 16% faster.
I'm wondering how the 2.5X to 20X faster reported by Mentor isn't what you see at only 16% faster.
I was simulating a delta sigma ADC ... one of the blocks not listed in the graphics. However, it is listed in the "target applications" section. I guess if they placed it in the graphics, the speedup will be very minimal ... in my case only 16% faster ! Another marketing gimmick !
However ... realistically, I will be running it on a multi-core machine ... hence the speedup is ~30% ... which is still significant.
One major drawback is that the licence usage is 2x !
However ... realistically, I will be running it on a multi-core machine ... hence the speedup is ~30% ... which is still significant.
One major drawback is that the licence usage is 2x !
Daniel Payne
Moderator
Ouch, a 2X license increase for only 30% speed up sounds a bit steep to me.
Ian Getreu
New member
Perspective: I have not used Eldo or Eldo Premier, nor do I have any axe to grind in this discussion.
Comment: In fairness to Mentor marketing (and marketing in general). simulation speed-ups are not the same for all circuits. Some will be sped up more, some less. The proper thing to do is to take a "representative set of circuits" (difficult to define) and look at the speed-up you get from them. This gives you a range of results. Marketing usually takes the higher end of those results.
It does look like you have achieved some speed-up, though not the expected amount - for this circuit.
To put that in perspective, it is very difficult to achieve large speed-ups for SPICE-type accuracy because of the near optimization originally done with SPICE.
Pricing is not usually proportional to speed-up - more related to the increased opportunity customers can obtain.
Comment: In fairness to Mentor marketing (and marketing in general). simulation speed-ups are not the same for all circuits. Some will be sped up more, some less. The proper thing to do is to take a "representative set of circuits" (difficult to define) and look at the speed-up you get from them. This gives you a range of results. Marketing usually takes the higher end of those results.
It does look like you have achieved some speed-up, though not the expected amount - for this circuit.
To put that in perspective, it is very difficult to achieve large speed-ups for SPICE-type accuracy because of the near optimization originally done with SPICE.
Pricing is not usually proportional to speed-up - more related to the increased opportunity customers can obtain.