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Message-ID: <20150824093803.GA23177@openwall.com>
Date: Mon, 24 Aug 2015 12:38:03 +0300
From: Solar Designer <solar@...nwall.com>
To: john-dev@...ts.openwall.com
Subject: md5crypt-opencl
magnum, all -
I've experimented with optimizing our md5crypt-opencl in various ways -
patch attached.
Before:
Device 1: Tahiti [AMD Radeon HD 7900 Series]
Benchmarking: md5crypt-opencl, crypt(3) $1$ [MD5 OpenCL]... DONE
Raw: 1966K c/s real, 28086K c/s virtual
0g 0:00:00:37 0.00% (ETA: 2030-08-03 18:33) 0g/s 435.9p/s 2839Kc/s 2839KC/s egyaaaaa..hmwbaaaa
Device 5: GeForce GTX TITAN
Benchmarking: md5crypt-opencl, crypt(3) $1$ [MD5 OpenCL]... DONE
Raw: 1512K c/s real, 1527K c/s virtual
0g 0:00:00:37 0g/s 0p/s 1876Kc/s 1876KC/s GPU:61б╟C util:94% fan:39% aaaaaaaa..xovdbaaa
After:
Device 1: Tahiti [AMD Radeon HD 7900 Series]
Benchmarking: md5crypt-opencl, crypt(3) $1$ [MD5 OpenCL]... DONE
Raw: 2146K c/s real, 23847K c/s virtual
0g 0:00:00:37 0.00% (ETA: 2030-08-03 18:40) 0g/s 434.8p/s 2988Kc/s 2988KC/s egyaaaaa..hmwbaaaa
or sometimes:
Raw: 2162K c/s real, 24029K c/s virtual
0g 0:00:00:37 0.00% (ETA: 2030-08-03 18:44) 0g/s 434.8p/s 2992Kc/s 2992KC/s egyaaaaa..hmwbaaaa
and sometimes it gets up to ~3005K.
Device 5: GeForce GTX TITAN
Benchmarking: md5crypt-opencl, crypt(3) $1$ [MD5 OpenCL]... DONE
Raw: 1638K c/s real, 1638K c/s virtual
0g 0:00:00:37 0g/s 0p/s 1861Kc/s 1861KC/s GPU:62б╟C util:99% fan:39% aaaaaaaa..xovdbaaa
With the inline ptx asm enabled (need proper compile-time check for it):
Raw: 1664K c/s real, 1664K c/s virtual
0g 0:00:00:37 0g/s 0p/s 1875Kc/s 1875KC/s GPU:62б╟C util:86% fan:39% aaaaaaaa..xovdbaaa
The actual cracking benchmarks here are for length 8 - possible changes
in handling of odd lengths are not seen there. I also ran length 7 and
9 benchmarks to see those.
The --test benchmarks run our usual mix of lengths, which is why they
are much worse.
As discussed in another thread, we probably need to try uint2 for this
kernel on Kepler.
Alexander
View attachment "john-md5crypt-opencl-opt1.diff" of type "text/plain" (10251 bytes)
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