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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

  • Kabal said:
    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

     

    I believe that you've selected the "processor affinity" option (-proc 2) and not number of threads (+mt=2).  See the relevant output of spectre -h for info on multithreading.

        +multithread  Turns on multithread capability.  Virtuoso(R) Spectre will automatically detect the number of processors and select the proper number of threads to use.  (See note on the 'options' help page about using multithreading.) You may use `+mt' as an abbreviation of `+multithread'.
        +multithread=N Turns on multithread capability. N is the specified number of threads. For baseline mode, at most 4 threads are allowed. For Turbo mode, at most 8 threads are allowed. You may use `+mt' as an abbreviation of `+multithread'.
        -multithread  Turns off multithread capability.  By default, multithreading is turned off for spectre but turn on for Turbo and APS. You may use `-mt' as an abbreviation of `-multithread'.
        -processor    Sets the CPU affinity of a process similar to Linux 'taskset' command. It specifies a numerical list of processors that may contain multiple items, separated by comma, e.g. '-processor 0-3,5,7'. Specification of numerical value out of range for current system results in the process termination with 'Invalid argument' error message You may use `-proc' as an abbreviation of `-processor'.
     

     

Reply

  • Kabal said:
    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

     

    I believe that you've selected the "processor affinity" option (-proc 2) and not number of threads (+mt=2).  See the relevant output of spectre -h for info on multithreading.

        +multithread  Turns on multithread capability.  Virtuoso(R) Spectre will automatically detect the number of processors and select the proper number of threads to use.  (See note on the 'options' help page about using multithreading.) You may use `+mt' as an abbreviation of `+multithread'.
        +multithread=N Turns on multithread capability. N is the specified number of threads. For baseline mode, at most 4 threads are allowed. For Turbo mode, at most 8 threads are allowed. You may use `+mt' as an abbreviation of `+multithread'.
        -multithread  Turns off multithread capability.  By default, multithreading is turned off for spectre but turn on for Turbo and APS. You may use `-mt' as an abbreviation of `-multithread'.
        -processor    Sets the CPU affinity of a process similar to Linux 'taskset' command. It specifies a numerical list of processors that may contain multiple items, separated by comma, e.g. '-processor 0-3,5,7'. Specification of numerical value out of range for current system results in the process termination with 'Invalid argument' error message You may use `-proc' as an abbreviation of `-processor'.
     

     

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