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spectre 32 bit or 64 bit?

upengan

Hi,

Ok, I am just an administrator. One of my users is adking me, why spectre gets invoked from 32bit directory instead of 64bit. 

 Here is the log snippet,

 Memory  available: 187.1503 MB  physical: 5.8504 GB
CPU(1 of 4):  CPU 0  Intel(R) Xeon(R) CPU           E5405  @ 2.00GHz  1995.000MHz

Simulating `input.scs' on yamdrok at 12:56:57 PM, Thur Jan 27, 2011 (process id: 32263).
Command line:
    /analog/cadence/mmsim71/tools.lnx86/spectre/bin/32bit/spectre  \
        input.scs +escchars +log ../psf/spectre.out +inter=mpsc  \
        +mpssession=spectre0_31221_4 -format sst2 -raw ../psf  \
        +lqtimeout 900 -maxw 5 -maxn 5
spectre pid = 32263

System is 4 processor,  model name    : Intel(R) Xeon(R) CPU           E5405  @ 2.00GHz

OS also is 64 bit linux,  Cadence (R) Virtuoso (R) Spectre (R) Circuit Simulator version 7.1.0.060.isr4 -- 25 Mar 2009

 

If you need any other i/p let me know. Thank you.

  • abhierao

    Sorry about the OS compatibility will make sure RedHAt from the next installation.

    I am running IC 615 &  MMSIM13.10.066_lnx86.Base on Ubuntu 13.10 on a 32bit machine.

     virtuoso -V
    @(#)$CDS: virtuoso version 6.1.5 05/04/2012 23:37 (sjfdl054) $
    abhinand@AB:~$ virtuoso -W
    sub-version  IC6.1.5.500.11

    My Kernel is   uname -a
    Linux AB 3.11.0-20-generic #35-Ubuntu SMP Fri May 2 21:31:50 UTC 2014 i686 i686 i686 GNU/Linux

    Running the cdsperl it says cannot execute, 

    abhinand@AB:~$ /home/abhinand/edatools/mmsim/tools.lnx86/perl/bin/cdsPerl

    bash: /home/abhinand/edatools/mmsim/tools.lnx86/perl/bin/cdsPerl: cannot execute binary file. 

    I was trying to simulate using a GPDK library, while GPDK 090nm simulated very fine, using GPDK 045nm shows this error. 

    I don't know if its a library issue either. 

     Thanks

    Abhinand

     

  • Andrew Beckett

    The issue is that since MMSIM11.1 we only support 64-bit OS. You can run spectre in 32-bit and 64-bit mode on a 64-bit OS (32-bit uses less memory because the pointers are single rather than double word, and there's a slight speed bonus by doing that).

    Some of the supporting utilities, for example, cdsPerl, are always 64-bit executables. So you can't run a 64-bit executable on a 32-bit OS (the other way around is possible though).

    If it's a 32-bit machine (rather than a 32-bit OS running on a 64-bit machine), then it suggests that the machine is quite old, since all hardware has been 64 bit for some time now. It seems an odd choice to run something as CPU intensive as circuit simulation on obsolete hardware...

    Regards,

    Andrew.

     

  • abhierao

    Any thoughts on the library though ?? GPDK090 is running without errors.

    Thanks

    Abhinand

  • Andrew Beckett

    Abhinand,

    It must just be the particular combination of devices you're using. This will depend upon whether you end up using any bsource devices or veriloga devices in your circuit (which may be in subckt models).

    Either way you're running on an unsupported bitness of an unsupported OS and the chances of it failing are high (particularly due to the bitness, because the OS incompatibility can typically be worked around by installing the right packages; the bitness cannot be solved without installing a 64-bit OS).

    This is precisely why we publish supported OS lists, because otherwise a lot of time gets spent trying to diagnose setup problems.

    Andrew.

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