Date: Tue, 10 Mar 2015 06:29:35 +0300 From: Aleksey Cherepanov <lyosha@...nwall.com> To: john-dev@...ts.openwall.com Subject: Re: john-devkit and sha512 On Tue, Mar 10, 2015 at 01:05:34AM +0300, Solar Designer wrote: > On Mon, Mar 09, 2015 at 11:49:12PM +0300, Aleksey Cherepanov wrote: > > I am happy to introduce my code generator for john. > > https://github.com/AlekseyCherepanov/john-devkit > > Thank you! > > > At the moment, it may produce raw-sha512 that works a bit faster. The > > produced code: > > https://gist.github.com/AlekseyCherepanov/75b6621d3e5abb0c19d6 > > > > I compare peak speeds of several 5s tests: > > the generated code > > Raw: 2237K c/s real, 2237K c/s virtual > > original Raw-SHA512 > > Raw: 2180K c/s real, 2180K c/s virtual > > I am seeing slight slowdown with the generated code: > > [solar@...er src]$ OMP_NUM_THREADS=1 ../run/john -te -form=raw-sha512 > Warning: OpenMP is disabled; a non-OpenMP build may be faster > Benchmarking: Raw-SHA512 [SHA512 128/128 SSE4.1 2x]... DONE > Raw: 3532K c/s real, 3568K c/s virtual > > [solar@...er src]$ OMP_NUM_THREADS=1 ../run/john -te -form=raw-sha512-my > Warning: OpenMP is disabled; a non-OpenMP build may be faster > Benchmarking: Raw-SHA512-my [SHA512 128/128 SSE4.1 (2 * 1)x]... DONE > Raw: 3491K c/s real, 3527K c/s virtual I did not test openmp. I disabled it at ./configure time with --disable-openmp. > I ran all of these tests a few times - the results are similar to the > above, with -my being slightly slower. A more important test would be > cumulative performance for --fork=32, though. Clearly, this hash is too > fast to scale well with OpenMP. > > BTW, even though I called the file raw-sha512-my_plug.c, and it got > built and linked into john, I had to manually add lines to fmt_externs.h > and fmt_registers.h to get the format registered. Perhaps there's some > bug preventing this from happening automatically. As magnum wrote, you need to run ./configure when you add a new format. Thanks! -- Regards, Aleksey Cherepanov
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