Date: Thu, 1 Jun 2006 05:34:45 +0200 From: "Otheus (aka Timothy J. Shelling)" <otheus@...il.com> To: john-users@...ts.openwall.com Subject: beta MPI john patch against 1.7.2. 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 Content of type "text/html" skipped
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