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Multiprocessor execution issue, MMSIM10, IC6.14

Kabal

I have read that one needs to have minimum 256 BSIM elements. And enable multiprocessor simulation in:

1. ADE XL->Options->Job Setup, and put Local, and number of jobs set to number of processors. Also in ADE XL->Options-Run Options, check Parallel, and share resources equally.

2.  In ADE XL itself go to Setup->Turbo/Parasitic extraction, and set processor affinity to number of processors, and check Turbo.

 

The machines we are running tools on are just Dual Core Pentium, 32bit. The tools run in 32bit mode too of course. 

I was just wondering would that help somehow? i.e. would it effectively utilize both of the processors? Because normally when we run things, i see that only one processor is loaded 100% not the other.

 Anyhow, once i do that and run simulation, here is what i get:

 Simulating `input.scs' on ee208-08 at 9:43:05 AM, Mon Apr 16, 2012 (process id: 19906).
Environment variable:
    SPECTRE_DEFAULTS=-E
Command line:
    /opt/cadence/MMSIM101/tools.lnx86/spectre/bin/32bit/spectre  \
        input.scs +escchars +log ../psf/spectre.out -format sst2 -raw  \
        ../psf +turbo -proc 2 +lqtimeout 900 -maxw 5 -maxn 5

Loading /opt/cadence/MMSIM101/tools.lnx86/cmi/lib/5.0/libinfineon_sh.so ...
Loading /opt/cadence/MMSIM101/tools.lnx86/cmi/lib/5.0/libphilips_sh.so ...
Loading /opt/cadence/MMSIM101/tools.lnx86/cmi/lib/5.0/libsparam_sh.so ...
Loading /opt/cadence/MMSIM101/tools.lnx86/cmi/lib/5.0/libstmodels_sh.so ...

Time for NDB Parsing: CPU = 457.929 ms, elapsed = 557.481 ms.
Time accumulated: CPU = 457.929 ms, elapsed = 557.481 ms.
Peak resident memory used = 28.5 Mbytes.


Time for parsing: CPU = 0 s, elapsed = 66.9956 us.
Time accumulated: CPU = 457.929 ms, elapsed = 558.369 ms.
Peak resident memory used = 28.5 Mbytes.


Aggregate audit (9:43:06 AM, Mon Apr 16, 2012):
Time used: CPU = 473 ms, elapsed = 573 ms, util. = 82.5%.
Time spent in licensing: elapsed = 155 ms, percentage of total = 27%.
Peak memory used = 28.5 Mbytes.
Simulation started at: 9:43:05 AM, Mon Apr 16, 2012, ended at: 9:43:06 AM, Mon Apr 16, 2012, with elapsed time (wall clock): 573 ms.
spectre completes with 1 error, 0 warnings, and 0 notices.

 I browsed for logs in simulation folder, didnt find anything related to error. Which file would give more information?

Any ideas how to actually make it utilize successfully both cores of our dual core PC?

Parents

  •  Thanks for the explanation Andrew.

     

     So best to just let the OS figure it out.

     Ok, so not it turns out that i *do not* have the ability to run single task utilizing all cores. Because eventually the tool cant figure that out, even when i do not messwith settings, my free cores sitting almost idle and the Cadence using only one.

Reply

  •  Thanks for the explanation Andrew.

     

     So best to just let the OS figure it out.

     Ok, so not it turns out that i *do not* have the ability to run single task utilizing all cores. Because eventually the tool cant figure that out, even when i do not messwith settings, my free cores sitting almost idle and the Cadence using only one.

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