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Title: Poclbm/Phatk speedup! Post by: LOG123 on September 01, 2011, 04:02:31 PM I've heard some people are getting quite a few coins from hacks like this, so, here goes.
I've found that if you go into your poclbm kernel.cl (only tested on mine ;D) and change Code: #define Ma2(x, y, z) ((y & z) | (x & (y | z))) Code: #define Ma2(x, y, z) amd_bytealign((z^y), (x), (y)) all of my hashes are getting accepted, so I don't know if there are any problems :P My bitcoin address is Code: 1M8Av4rzfyMMMrP5nqUmmhKHhZKB1U7Zux Feel free to donate if this works for you ;D Title: Re: Poclbm/Phatk speedup! Post by: LOG123 on September 02, 2011, 03:29:20 PM bump so people can see this ;D
Title: Re: Poclbm/Phatk speedup! Post by: LOG123 on September 02, 2011, 04:33:04 PM I just want to point out that the poster did not find this, rethaw did, and detailed it in his post here: If you actually looked at what I did, it's different from that other modification. I'm not even sure if it really increases speed, or if I'm just having a lucky day with my miner :Phttp://bitcointalk.org/index.php?topic=23067.0 So if you are going to donate to anyone, I'd say let it go to the person that originally discovered this. I might be wrong about this, but I'm pretty sure a lot of updated miner's have already incorporated this as well, but check for yourself, rethaw's instructions are pretty detailed. I have been running with the modification myself for about a month, no different in stales but a slight bump in MH/S --------------EDIT----------------- So I might be wrong about who originally came up with this, because the post referenced to in the one I linked is by someone else again, but anyway, this has been documented before. I changed Code: #define Ma2(x, y, z) ((y & z) | (x & (y | z))) Code: #define Ma2(x, y, z) amd_bytealign((z^y), (x), (y)) The other modification is Code: #define Ma(x, y, z) amd_bytealign((y), (x | z), (z & x)) Code: #define Ma(x, y, z) amd_bytealign( (z^x), (y), (x) ) Title: Re: Poclbm/Phatk speedup! Post by: echris1 on September 02, 2011, 06:17:21 PM Oops, sorry about that, yeah I do feel a bit foolish now, guess that is why I never got into any kind of coding, lack of attention to detail =)
Anyway, I deleted my post, sorry again. Title: Re: Poclbm/Phatk speedup! Post by: LOG123 on September 02, 2011, 06:28:06 PM That's alright ;D
Also, have you tried this tweak? And has it improved your mhash rate at all? Title: Re: Poclbm/Phatk speedup! Post by: echris1 on September 02, 2011, 07:06:45 PM I am using phatk2, which doesn't seem to have that line in it.
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