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Date: Sun, 16 Aug 2015 00:21:41 +0200
From: Agnieszka Bielec <bielecagnieszka8@...il.com>
To: john-dev@...ts.openwall.com
Subject: Re: PHC: Argon2 on GPU
I added to crypt_all() time measurement and here are results:
[a@...er run]$ ./john --test --format=argon2i-opencl --v=4
Benchmarking: argon2i-opencl [Blake2 OpenCL]...
memory per hash : 1.46 MB
Device 0: Tahiti [AMD Radeon HD 7900 Series]
Options used: -I ./kernels -cl-mad-enable -D__GPU__ -DDEVICE_INFO=138
-DDEV_VER_MAJOR=1800 -DDEV_VER_MINOR=5 -D_OPENCL_COMPILER
-DBINARY_SIZE=256 -DSALT_SIZE=64 -DPLAINTEXT_LENGTH=32
Calculating best global worksize (GWS); max. 1s single kernel invocation.
crypt all start, count=256, gws=256, lws=64
crypt all end, time: 0.702250
gws: 256 385 c/s 385 rounds/s 664.384ms per crypt_all()!
crypt all start, count=512, gws=512, lws=64
crypt all end, time: 0.738910
gws: 512 719 c/s 719 rounds/s 711.666ms per crypt_all()+
crypt all start, count=1024, gws=1024, lws=64
crypt all end, time: 0.819439
gws: 1024 1306 c/s 1306 rounds/s 783.545ms per crypt_all()+
Local worksize (LWS) 64, global worksize (GWS) 1024
crypt all start, count=1, gws=64, lws=64
crypt all end, time: 0.982416
crypt all start, count=2, gws=64, lws=64
crypt all end, time: 0.642484
crypt all start, count=3, gws=64, lws=64
crypt all end, time: 0.675356
crypt all start, count=4, gws=64, lws=64
crypt all end, time: 0.677136
crypt all start, count=5, gws=64, lws=64
crypt all end, time: 0.057678
crypt all start, count=7, gws=64, lws=64
crypt all end, time: 0.057936
crypt all start, count=10, gws=64, lws=64
crypt all end, time: 0.042161
crypt all start, count=14, gws=64, lws=64
crypt all end, time: 0.054247
crypt all start, count=1024, gws=1024, lws=64
crypt all end, time: 2.615536
using different password for benchmarking
crypt all start, count=1024, gws=1024, lws=64
crypt all end, time: 2.635043
qqqqqqqqqqqqqqqqqqqqqqqqq
real_time 263
crypt all start, count=1024, gws=1024, lws=64
crypt all end, time: 2.645786
qqqqqqqqqqqqqqqqqqqqqqqqq
real_time 265
DONE
Speed for cost 1 (t) of 3, cost 2 (m) of 1500, cost 3 (l) of 1
ten int 1024
clock : 263
aaa Many salts: 389 c/s real, 102400 c/s virtual
zzzzz Only one salt: 386 c/s real, 102400 c/s virtual
[a@...er run]$ GWS=1024 ./john --test --format=argon2i-opencl --v=4
Benchmarking: argon2i-opencl [Blake2 OpenCL]...
memory per hash : 1.46 MB
Device 0: Tahiti [AMD Radeon HD 7900 Series]
Local worksize (LWS) 64, global worksize (GWS) 1024
crypt all start, count=1, gws=64, lws=64
crypt all end, time: 0.653867
crypt all start, count=2, gws=64, lws=64
crypt all end, time: 0.578068
crypt all start, count=3, gws=64, lws=64
crypt all end, time: 0.618967
crypt all start, count=4, gws=64, lws=64
crypt all end, time: 0.621076
crypt all start, count=5, gws=64, lws=64
crypt all end, time: 0.053851
crypt all start, count=7, gws=64, lws=64
crypt all end, time: 0.054477
crypt all start, count=10, gws=64, lws=64
crypt all end, time: 0.041921
crypt all start, count=14, gws=64, lws=64
crypt all end, time: 0.052137
crypt all start, count=1024, gws=1024, lws=64
crypt all end, time: 0.788093
using different password for benchmarking
crypt all start, count=1024, gws=1024, lws=64
crypt all end, time: 0.788118
crypt all start, count=1024, gws=1024, lws=64
crypt all end, time: 0.789293
qqqqqqqqqqqqqqqqqqqqqqqqq
real_time 158
crypt all start, count=1024, gws=1024, lws=64
crypt all end, time: 0.788320
crypt all start, count=1024, gws=1024, lws=64
crypt all end, time: 0.787732
qqqqqqqqqqqqqqqqqqqqqqqqq
real_time 158
DONE
Speed for cost 1 (t) of 3, cost 2 (m) of 1500, cost 3 (l) of 1
ten int 2048
clock : 158
aaa Many salts: 1296 c/s real, 204800 c/s virtual
zzzzz Only one salt: 1296 c/s real, 102400 c/s virtual
don't know how is this possible, this bug occurs only on super AMD
(--dev=5 on super works after I cut plaintext length)
also the same problem in cracking run - works faster when GWS=1024 is
set, works slow when GWS is not set
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