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Date: Thu, 6 Jun 2013 16:49:40 +0200 From: Marc Brinkmann <marc.brinkmann@...il.com> To: john-users@...ts.openwall.com Subject: Re: Adding more "Nodes" to MPI Session Thanks magnum, for your fast answer. Could you please tell me the syntax for OpenMP? I'd like to run a OMP benchmark. If it's fast enough, I'll restart the session. Thank you very much. PS: if the CPU also supports opencl, couldn't i use it? Thank you very much =) 2013/6/6 magnum <john.magnum@...hmail.com> > On 6 Jun, 2013, at 15:32 , Marc Brinkmann <marc.brinkmann@...il.com> > wrote: > > i just stopped my john-session that was running for about 130 days on MPI > > (4 cores) to breack an office2010 password. > > > > i upgraded the VM from 4 to 6 vCPUs > > is there a way to restore my session using all 6 cores? > > because now there is no john.4.rec and no john.5.rec :( > > And it would be sad, to start from scratch. > > In general, no. You should have used OMP instead of MPI. It would do more > or less the same speed (in this case) but with OMP you can change number of > threads when restoring jobs. > > There is a way to resume MPI and *double* the number of cores though, > using OMP together with MPI: If you go eg. from 4 to 8 CPUs, you can resume > the old job after setting "MPIOMPmutex = N" in john.conf and start the job > like this: > > mpirun -x OMP_NUM_THREADS=2 -np 4 ./john -resume:name > > magnum >
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