Date: Thu, 1 Jun 2006 05:24:37 -0500 From: "Randy B" <aoz.syn@...il.com> To: john-users@...ts.openwall.com Subject: Re: beta MPI john patch against 1.7.2. Any particular MPI implementation you either espouse or recommend avoiding? I personally have been using lam-mpi, but that was more of a random dart-board kind of selection than anything. RB On 5/31/06, Otheus (aka Timothy J. Shelling) <otheus@...il.com> wrote: > This is a (beta) patch for John 1.7.2 for use with MPI. All of the > MPI-specific code is encapsulated by #ifdef MPI/#endif, so in theory this > can be integrated into the main code branch. However, a few generic changes > to the code are also made. > > Please let me know of any rejects while performing the patch. (Use -l to > ignore whitespace to avoid problems with bench.c.) > > Changes: > o internalized computing the checksum for ext_word. 15% increase in speed > (at least) > o makes sure options required for MPI are present > o computes MPI performance in --test mode. > > Notes: > o benchmark computes results by summing cracks across all nodes and > dividing that by the AVERAGE of the crack-times. (in the code, cracks are > multiplied by the MPI-size, which is the same thing). > > Known bugs: > o john.pot gets littered with extraneous output, usually low integers > like "4" or "1" and a newline. Very strange. Still trying to track it down. > o successfull cracks do not get posted to the other tasks > o use of external filter with internal checksum causes a slight (1-2%) > slowdown > > > Incorporate the john.conf file into yours (or the default)... then run with: > > mpirun <mpirun-args> john <mode> --external=MPIbyInternalKeySum > --session=john%d.rec > > For a restore: > > mpirun <mpirun-args> john --restore=john%d.rec > > You can also benchmark it: > > mpirun <mpirun-args> john --test > > > -- > Otheus > otheus@...il.com > +43.650.790.2571 > -- > To unsubscribe, e-mail > john-users-unsubscribe@...ts.openwall.com and reply > to the automated confirmation request that will be sent to you. > >
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