Stats

  • Locked Locked
  • Replies 11
  • Subscribers 127
  • Views 30155
  • Members are here 0
This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

APS, Multi-threading, High-Performance Simulation...

aditeman

Andrew,

 

I am a bit confused with all of the high performance simulation options in ADE-XL/GXL.

I am using IC 6.1.5.506 with  MMSIM 10.11.200

On ADE I have:

  1. "Options->Job Setup->Max Jobs"  

   2.  "Options->Run Options-> Run In"

  3.  "High-Performance Simulation->Mode, Multithreading options, Affinity"

  4. "Options->Analog->Multithreading Options"

Maybe others...

 

What is the up to date way to run my simulations as fast as possible?

The main reason I'm asking is that I've had some problems when setting things such as APS + Max Jobs=8. For example, I've had these settings and sent a small simulation with a few corners and after waiting 10 minutes it still hadn't started. In general, it seems to take minutes until simulations start running sometimes (and then they run very fast).

Any suggestions/explanations?

 

Thanks,

 

ADi 

 

Parents
  • Andrew Beckett

      1. "Options->Job Setup->Max Jobs"  

    This controls the number of parallel simulations that may be run at once in ADE XL. If you are using multiple tests in ADE XL, or corners, or sweeping variables or parameters, each one of these counts as a "job", and they can be run in parallel (on the local machine, on a remote machine, or distributed using a queueing system). Also if using Monte Carlo, it can break up the number of monte carlo points into chunks, based on the number of available parallel runs.

      2.  "Options->Run Options-> Run In"

    This is not that useful - it's more to do if you hit the "Run" button again before existing jobs have finished - maybe having changed some setup.

      3.  "High-Performance Simulation->Mode, Multithreading options, Affinity"

    This allows an individual simulation job to take advantage of multi-core technology and do things like the matrix solve in parallel - so it can speed up an individual simulation. Processor Affinity should be left alone (it allows you to get absolutely the best performance by telling the simulator which CPUs in a multi-core machine are to be used, but this is only ever useful if you have complete control over the machine you're running on, and has to be set carefully and is not normally worth the bother of setting)

      4. "Options->Analog->Multithreading Options"

    This is pretty much obsolete nowadays - it was an earlier form of (limited) multithreadhing. It controls the same thing that's on the High Performance Options setting now - but that's the preferred location (the high performance options) to set multi-threadhing.

    Regards,

    Andrew.

Reply
  • Andrew Beckett

      1. "Options->Job Setup->Max Jobs"  

    This controls the number of parallel simulations that may be run at once in ADE XL. If you are using multiple tests in ADE XL, or corners, or sweeping variables or parameters, each one of these counts as a "job", and they can be run in parallel (on the local machine, on a remote machine, or distributed using a queueing system). Also if using Monte Carlo, it can break up the number of monte carlo points into chunks, based on the number of available parallel runs.

      2.  "Options->Run Options-> Run In"

    This is not that useful - it's more to do if you hit the "Run" button again before existing jobs have finished - maybe having changed some setup.

      3.  "High-Performance Simulation->Mode, Multithreading options, Affinity"

    This allows an individual simulation job to take advantage of multi-core technology and do things like the matrix solve in parallel - so it can speed up an individual simulation. Processor Affinity should be left alone (it allows you to get absolutely the best performance by telling the simulator which CPUs in a multi-core machine are to be used, but this is only ever useful if you have complete control over the machine you're running on, and has to be set carefully and is not normally worth the bother of setting)

      4. "Options->Analog->Multithreading Options"

    This is pretty much obsolete nowadays - it was an earlier form of (limited) multithreadhing. It controls the same thing that's on the High Performance Options setting now - but that's the preferred location (the high performance options) to set multi-threadhing.

    Regards,

    Andrew.

Children
No Data

Community Guidelines

The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices to solve problems and get the most from Cadence technology. The community is open to everyone, and to provide the most value, we require participants to follow our Community Guidelines that facilitate a quality exchange of ideas and information. By accessing, contributing, using or downloading any materials from the site, you agree to be bound by the full Community Guidelines.