Date: Tue, 2 Aug 2011 09:11:08 +0200 From: Lukas Odzioba <lukas.odzioba@...il.com> To: john-dev@...ts.openwall.com Subject: Re: cryptmd5cuda > This is puzzling. As far as I'm aware, they're supposed to be faster on > NVidia as well. How did this change affect code size? Did the code > size reduce with the fewer-ops F and G functions? Yes, there is reduction in ptx code (http://ideone.com/X6RsH) > Perhaps you have some other bottleneck that you're hitting. I tried to test speed only F and G, and the difference in speed was even bigger. > That's OK, but it's 3 times slower than the benchmark you have posted on > the wiki, right? So is there a 3x performance hit for actual cracking > as compared to --test? Yes, and I need to find why. > 100k c/s is probably achievable on your i3-2100 CPU if you do a more > optimal build (see above) and use all CPU cores at once. I am not > asking you to do that; I merely point out that the speedup with a GPU is > still questionable, unfortunately. Agree Lukas
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