[immortality]

Hi
is it possible to use postProcessing commands like "Mach" on the files in processors withot reconstructing?

[wyldckat]

Quick question: have you tried asking the application for help?

Mach -help

And no, I'm not kidding

[immortality]

Hi Bruno
the application is tired now and doesn't answer!
do you know anything?

ehsan@Ehsan-com:~/Desktop/WR_4$ Mach -help

Usage: Mach [OPTIONS]
options:
  -case <dir>       specify alternate case directory, default is the cwd
  -constant         include the 'constant/' dir in the times list
  -dict <file>      read control dictionary from specified location
  -latestTime       select the latest time
  -noFlow           suppress creating flow models (execFlowFunctionObjects only)
  -noFunctionObjects
                    do not execute functionObjects
  -noWrite          suppress writing results
  -noZero           exclude the '0/' dir from the times list, has precedence
                    over the -zeroTime option
  -parallel         run in parallel
  -region <name>    specify alternative mesh region
  -roots <(dir1 .. dirN)>
                    slave root directories for distributed running
  -time <ranges>    comma-separated time ranges - eg, ':10,20,40:70,1000:'
  -srcDoc           display source code in browser
  -doc              display application documentation in browser
  -help             print the usage

[ngj]

I suppose that the option "-parallel" is what you are looking for.

Kind regards

Niels

[immortality]

thanks,I used it in a case with one time folder in processor folders and this error occurred:

--> FOAM FATAL ERROR: 
bool IPstream::init(int& argc, char**& argv) : attempt to run parallel on 1 processor

    From function UPstream::init(int& argc, char**& argv)
    in file UPstream.C at line 79.

FOAM aborting

#0  Foam::error::printStack(Foam::Ostream&) in "/opt/openfoam220/platforms/linux64GccDPOpt/lib/libOpenFOAM.so"
#1  Foam::error::abort() in "/opt/openfoam220/platforms/linux64GccDPOpt/lib/libOpenFOAM.so"
#2  Foam::UPstream::init(int&, char**&) in "/opt/openfoam220/platforms/linux64GccDPOpt/lib/openmpi-system/libPstream.so"
#3  Foam::argList::argList(int&, char**&, bool, bool) in "/opt/openfoam220/platforms/linux64GccDPOpt/lib/libOpenFOAM.so"
#4  
 in "/opt/openfoam220/platforms/linux64GccDPOpt/bin/Mach"
#5  __libc_start_main in "/lib/x86_64-linux-gnu/libc.so.6"
#6  
 in "/opt/openfoam220/platforms/linux64GccDPOpt/bin/Mach"
[Ehsan-com:23454] *** Process received signal ***
[Ehsan-com:23454] Signal: Aborted (6)
[Ehsan-com:23454] Signal code:  (-6)
[Ehsan-com:23454] [ 0] /lib/x86_64-linux-gnu/libc.so.6(+0x36460) [0x7f4e67e64460]
[Ehsan-com:23454] [ 1] /lib/x86_64-linux-gnu/libc.so.6(gsignal+0x35) [0x7f4e67e643e5]
[Ehsan-com:23454] [ 2] /lib/x86_64-linux-gnu/libc.so.6(abort+0x17b) [0x7f4e67e67b4b]
[Ehsan-com:23454] [ 3] /opt/openfoam220/platforms/linux64GccDPOpt/lib/libOpenFOAM.so(_ZN4Foam5error5abortEv+0x166) [0x7f4e68d69046]
[Ehsan-com:23454] [ 4] /opt/openfoam220/platforms/linux64GccDPOpt/lib/openmpi-system/libPstream.so(_ZN4Foam8UPstream4initERiRPPc+0x48f) [0x7f4e67c27c5f]
[Ehsan-com:23454] [ 5] /opt/openfoam220/platforms/linux64GccDPOpt/lib/libOpenFOAM.so(_ZN4Foam7argListC1ERiRPPcbb+0x23ce) [0x7f4e68d8a84e]
[Ehsan-com:23454] [ 6] Mach() [0x40c3d8]
[Ehsan-com:23454] [ 7] /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xed) [0x7f4e67e4f30d]
[Ehsan-com:23454] [ 8] Mach() [0x40cb7d]
[Ehsan-com:23454] *** End of error message ***
Aborted

I tried it in another case with several time folders in processor folders with the same error,could you please have a look into a case to see why this happens?

[wyldckat]

Hi Niels and Ehsan.

@Ehsan: I'm trying to get you to think for yourself, which is why I didn't give the straight answer. And I still won't. I'll give you only a few clues

Starting with this quote:

Originally Posted by immortality

--> FOAM FATAL ERROR: 
bool IPstream::init(int& argc, char**& argv) : attempt to run parallel on 1 processor

In addition, I'll ask you back: how do you launch solvers in parallel?
And have you tried using the "-help" command with the solvers you usually use?

Best regards,
Bruno

[immortality]

Hi Bruno
I'm using pyFoamPlotRunner.py for a while and had forgot about mpirun,
I used

mpirun -np 4 Mach -parallel

but it makes another trouble now,how can add this option to totalPressureComp that we made before?

[wyldckat]

Originally Posted by immortality

but it makes another trouble now,how can add this option to totalPressureComp that we made before?

Mmm... there have been so many things I've done so far, that I can't remember which one is the "totalPressureComp" one. There are a few possibilities:

1. It might now be possible, depending on how the calculation is done.
2. Or it might be simple to do, by simply comparing the content of each ".C" file.
3. Or it's already implemented, depending on what "-help" tells you.

[immortality]

I sent it to you,it can use the -parallel option,it's interesting a lot!