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Spectre distributed simulation using ssh

rsashwinkumar

I have a netlist (with parasitics extracted using calibre)  for an ADC and I need to run a long transient simulation. In order to reduce the simulation time, I am trying to run a distributed simulation using ssh.  I have the netlist in a network location. And I am running the command from a machine (sys1) with the simulation running in sys2 and sys3. I have done the following : 

1. Added the hostnames  and  disabled firewall in all the three machines.

2. Installed openssh in all three, synced their times to a NTP server

3. I run the following command in the terminal from sys1

    spectre -64 /home/input.scs +escchars +log /home/psf/spectre.out -format psfxl -raw /home/psf +aps +mt=8 +cktpreset=sampled +postlayout +lqtimeout 900 -maxw 5 -maxn 5 +dp=ssh +hosts "sys2:8 sys3:8"

It loads all the model files, compiles them and when the simulation is about to start I get the following error

DC simulation time: CPU = 35.1084 s, elapsed = 10.9721 s.

Opening the PSFXL file /home/psf/tran.tran.tran ...
Important parameter values:
    start = 0 s
    outputstart = 0 s
    stop = 820 us
    step = 820 ns
    maxstep = 500 ps
    ic = all
    useprevic = no
    skipdc = no
    reltol = 1e-06
    abstol(V) = 1 uV
    abstol(I) = 1 pA
    temp = 40 C
    tnom = 27 C
    tempeffects = all
    errpreset = conservative
    method = gear2only
    lteratio = 10
    relref = alllocal
    cmin = 0 F
    gmin = 1 pS
    rabsshort = 1 mOhm


===================================================================================
=   BAD TERMINATION OF ONE OF YOUR APPLICATION PROCESSES
=   EXIT CODE: 139
=   CLEANING UP REMAINING PROCESSES
=   YOU CAN IGNORE THE BELOW CLEANUP MESSAGES
===================================================================================
[proxy:0:0@sys2] HYD_pmcd_pmip_control_cmd_cb (./pm/pmiserv/pmip_cb.c:883): assert (!closed) failed
[proxy:0:0@sys2] HYDT_dmxu_poll_wait_for_event (./tools/demux/demux_poll.c:77): callback returned error status
[proxy:0:0@sys2] main (./pm/pmiserv/pmip.c:210): demux engine error waiting for event

However when I use the same command to run it only in one sys2 with this command

spectre -64 /home/input.scs +escchars +log /home/psf/spectre.out -format psfxl -raw /home/psf +aps +mt=8 +cktpreset=sampled +postlayout +lqtimeout 900 -maxw 5 -maxn 5 +dp=ssh +hosts "sys2:8"

the simulation runs without any problem.

Kindly help me out with this problem.

  • I tried an example using +dp=ssh and it worked fine - didn't hit this error (I was using multiple hosts, and with or without +mt=8).

    You didn't give any info on the spectre version being used, but either way I didn't see this reported (quite) before - there were some similar messages but not always from APS. The error is coming from within the OPENMPI code. The best thing would be to talk to customer support about this - there's potentially some debugging options that could be added (I don't want to advertise it in a public forum) to help understand this.

    Regards.

    Andrew.

  • in reply to Andrew Beckett

    Thank you Andrew. I will contact the customer support.

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