Date: Thu, 17 May 2012 17:52:50 +0800 From: myrice <qqlddg@...il.com> To: john-dev@...ts.openwall.com Subject: Re: Myrice: Weekly Report #5 Solar, Samuele - On Thu, May 17, 2012 at 8:24 AM, Solar Designer <solar@...nwall.com> wrote: > What has happened to your plans to implement storage of loaded > hashes and/or salts on the GPU end, though? And to support occasional > long passwords while not hurting performance for short passwords? > Also, you wanted to comment on "Password Generation on GPU", but I think > you never did (I exchanged a few messages with Frank, and that's all). > I understand that you can't work on too many sub-tasks at once; I am > merely asking, recalling that this stuff was previously among your > Priorities, and seeing that now it just disappeared. > Loaded hashes+salts: I remember from my previous post, I said the performance does not improve a lot. I forgot to post my experiment. I will make another post now. Long password: Oh, I forgot to add to the priority list. I am currently working on that. Password Generation on GPU: I want to put it after I implement SHA512 format. Now SHA512 format only reach 22M c/s. When I comment out set_key and password transfer from CPU to GPU, the performance reach to 35M c/s. Though this test is not that accurate, there is a space for improvement. I hopefully start this the next week. >> I am stuck at my xsha512-opencl on 7970. It seems that bitwise >> operation is strange on 64bit variable. This slows my progress, > > That's nasty. Do you have access to any other ATI/AMD GPU (no older > than 4xxx series)? If not, would providing you with remote access to > one be of help (to see if the issue is with code generation for 7970 > specifically or with AMD APP SDK or driver in general)? Oh, I recall > that Samuele reported that your code failed on his 6970 as well, right? 6970 seems not lost high 32bit from Samuele's experiment. I just asked Samuele to test. It failed on both CPU and GPU. Thanks myrice
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