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ADEXL Montecarlo, only netlisting

demsar

Hi!

For the reason of some preprocessing I need to separate the netlisting and the montacerlo simulation itself. Does anybody know, which skill/ocean procedure is used to trigger the netlisting (including the netlist variations in case of using multiple jobs).

Best regards!

Blaz

Parents

  • Hi Pierre,

    If you ask to run 300 monte carlo runs in ADE XL, it depends on the number of jobs (in the Options->Job Setup form) as to how the simulations will be partitioned. If for example you had a single test, and a single corner, and asked to do 300 MC points, and 15 jobs, each would have numruns=20 - so each invocation of spectre would start from a particular run number and do 20 runs sequentially - but these 15 blocks of 20 runs could potentially run in parallel (depending on the capabilities of your job distribution system if you're using that).

    In general the results should be the same if you run 300 individual runs or 15 runs with 20 in each. However, occasionally you might find that a point has a convergence difficulty, and that might be aided by the fact that starting from the previous solution might make it a little easier to converge. So that might explain why the runs from the UI converged, whereas some of the individual 300 runs did not succeed?

    BTW, the forum guidelines (at the top of the posts in each forum) ask you not to append to old threads... it makes it hard to follow. Done now, and I didn't feel like splitting it up in this case...

    Regards,

    Andrew.

Reply

  • Hi Pierre,

    If you ask to run 300 monte carlo runs in ADE XL, it depends on the number of jobs (in the Options->Job Setup form) as to how the simulations will be partitioned. If for example you had a single test, and a single corner, and asked to do 300 MC points, and 15 jobs, each would have numruns=20 - so each invocation of spectre would start from a particular run number and do 20 runs sequentially - but these 15 blocks of 20 runs could potentially run in parallel (depending on the capabilities of your job distribution system if you're using that).

    In general the results should be the same if you run 300 individual runs or 15 runs with 20 in each. However, occasionally you might find that a point has a convergence difficulty, and that might be aided by the fact that starting from the previous solution might make it a little easier to converge. So that might explain why the runs from the UI converged, whereas some of the individual 300 runs did not succeed?

    BTW, the forum guidelines (at the top of the posts in each forum) ask you not to append to old threads... it makes it hard to follow. Done now, and I didn't feel like splitting it up in this case...

    Regards,

    Andrew.

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