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Job mode control issue, LSCS v.s. ICRP

gangliurfic

I am working in a large company where there is grid to run the jobs.

I have a small simulation which takes less than 1 min simulation time, but I want to do a variable sweep, say 32 points. so I have total 32 simulations.

If I use LCSC mode, it will first launch one job, wait for the server, then get it done, and then submit 32 netlisting jobs followed by 32 simulation jobs. After I get the results, I change the variable sweep and launch the sim again. It will go through the procedure again. Overall the turn around time is much longer, especially when the grid is busy

I prefer to use ICRP mode for these small sims. Same experiment, it will submit 32 jobs once and that's it. When each job is done the results are there. If I launch another sim immediately, the grid server will be available and the new sim will start immediately. The turn around time is much shorter than LCSC mode.

However, my ICRP jobs gets killed by itself.

ERROR (ASSEMBLER-5034): While simulating run Interactive.24, point 27, xxx, received error:
Error:
------------------------------
ERROR - ICRP has stopped the Spectre process because the process consistency check has failed unexpectedly. Possible reasons could be the unavailability of the required license or an unusual delay in launching Spectre.

for the point: (22 27)

Actually the simulation itself started, but it seems something was triggerd at a certain time, maybe around 60s and then killed the sim before it finishes. 

I don't know if this is because of something set on the grid, or it is because of something set by cadence. BTW, the same simulation can finish without any problem in LCSC mode.

I was using ICRP in my old company and things worked well. Now I started in a new company and my ICRP jobs can't run. It won't be resolved through the company IT/CAD as I was told ICRP mode was not recommended.

Therefore I want to bring up the discussion here. If there are some settings I can change on the user side to disable this kind of check, then it'll be good.

Thank you.

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  • gangliurfic

    Hi Andrew,

    To continue on this topic. I have one request, please keep the ICRP mode. You can keep it as is and don't further develop, but please keep it.

    It is still very useful for quick simulations and I still prefer to use it, especially for large number of small simulations and when grid is busy, as always.

    Hopefully LCSC can improve and shorten the gap.

    Thanks.

  • Andrew Beckett
    in reply to gangliurfic

    Apologies - I meant to reply to your earlier reply but was busy with various other things. To do this kind of detailed investigation of the performance gaps, it would be best to contact customer support (use the Case menu after logging in to submit a support case).

    The ultimate plan is to fully replace ICRP with LSCS, but that won't happen until the remaining gaps have been eliminated (note, in many cases the gaps are already insignificant). There have been some flow improvements (particularly with netlisting optimization) in IC25.1 ISR6, so it would be worth checking that too, but I would advise talking to customer support so that we can fully understand your setup and what's going on and why there remains a gap.

    Andrew

Reply
  • Andrew Beckett
    in reply to gangliurfic

    Apologies - I meant to reply to your earlier reply but was busy with various other things. To do this kind of detailed investigation of the performance gaps, it would be best to contact customer support (use the Case menu after logging in to submit a support case).

    The ultimate plan is to fully replace ICRP with LSCS, but that won't happen until the remaining gaps have been eliminated (note, in many cases the gaps are already insignificant). There have been some flow improvements (particularly with netlisting optimization) in IC25.1 ISR6, so it would be worth checking that too, but I would advise talking to customer support so that we can fully understand your setup and what's going on and why there remains a gap.

    Andrew

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