john-users - Re: Hyperthreading / fork versus mpi / instruction sets?

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Date: Mon, 11 Sep 2017 12:54:20 +0200
From: "Jeroen" <spam@...lab.nl>
To: <john-users@...ts.openwall.com>
Subject: Re: Hyperthreading / fork versus mpi / instruction sets?

magnum wrote:

>I'm only answering the Fork/MPI part here.

Thanks magum, this make the fork versus MPI part clear!

<SNAP>
>MPI is never run by default. You usually run a wrapper called mpirun or
>mpiexec.

Aaah, I see that I've misread a part of the console output:

bofh@dev:/opt/JohnTheRipper/run$ ./john /tmp/bcrypt.example
Using default input encoding: UTF-8
Loaded 1 password hash (bcrypt [Blowfish 32/64 X2])
Will run 8 OpenMP threads
^^^^^^^^^^^^^^^^^^^^^^^^^

I my mind it said OpenMPI :)

Any thoughts about OpenMP versus fork? Or is it doing the same, except starting 1 process?

Thanks,

Jeroen

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