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Date: Sun, 14 Jul 2013 23:14:51 +0200
From: Katja Malvoni <>
Subject: Re: Parallella: bcrypt


I made mentioned changes but at the moment implementation is not reliable,
sometimes it happens that some of the cores stuck. It passes self test in
most of the cases, but it can't crack from JtrTestSuite in one
run - deadlock happens. If I limit the number of times each core is polled
than it finishes but that's not reliable because some keys are never tried
since some cores don't signal done and host skips results from that cores.
Number of remaining non cracked passwords after first run differs (for last
two runs it was 31 and 42) and than 3 for the third run (after third run
all passwords are cracked). Performance also differs, for the first run it
varies from around 630 c/s to 670 c/s.
When it passes self test this is performance:
822 c/s real, 822 c/s virtual

Tomorrow I'll try to figure out how exactly those cores stall and why it
happens occasionally.

Best regards,


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