Amph
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April 09, 2014, 06:43:13 AM |
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i'm talking about groestlcoin , so not myriad
same problem even with --difficulty-multiplier 0.0039062500, share is above target
Did you try 1 and 256? yeah, both give me the same thing, also isn't 1 the default setting?
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pallas
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April 09, 2014, 08:07:32 AM |
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My 290(X)s don't like this /un/optimization. sometimes small hashrate gains are just bogus: I had proof that recompiling the exact same .cl file can yield a small performance gain or loose.
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AlexGR
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April 09, 2014, 01:11:50 PM |
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Yes, I've seen bogus fluctuations of 1%, but the 4.25% for #pragma unroll 1 on the 8th "for i" is repeatable.
939kh is the baseline, I did #pragma unroll 1 in all "for" loops. I only gained with the 4th and 8th, but interestingly when doing them both I went <939. So I kept the 8th #pragma unroll 1 which is the fastest of all.
1: 939 2: 896 3: 921 4: 947! 5: 880 6: 877 7: 895 8: 979! 9: 879 10: 939 11: 939 12: 877 13: 938 14: 888 15: 892
I had previously tried #pragma unroll but didn't find any speed. I also hardcoded easily computed values in simd.cl instead of having then been computed, and still didn't get any speedup.
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pallas
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April 09, 2014, 01:27:23 PM |
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Yes, I've seen bogus fluctuations of 1%, but the 4.25% for #pragma unroll 1 on the 8th "for i" is repeatable.
939kh is the baseline, I did #pragma unroll 1 in all "for" loops. I only gained with the 4th and 8th, but interestingly when doing them both I went <939. So I kept the 8th #pragma unroll 1 which is the fastest of all.
I had previously tried #pragma unroll but didn't find any speed. I also hardcoded easily computed values in simd.cl instead of having then been computed, and still didn't get any speedup.
I believe all this has to do with compiler optimizations, which usually can figure out how to best unroll or pre-compute values automatically, but sometimes it's better to do them manually. And results may vary by card, for example a simple optimization may work for a 7950 but lead to worse results on a r9 290.
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restless
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April 09, 2014, 01:43:03 PM |
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The real optimisation is possible for Groestl, atm its implementation is at least 10x slower than whats possible
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AlexGR
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April 09, 2014, 02:08:43 PM |
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Hmm... but how much time is spent in Groestl?
Theoretically if one disables hash-by-hash, one can get a breakdown of how much time is consumed in each in order to see where the potential for speedup is.
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xfelinho
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April 09, 2014, 05:19:48 PM |
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Optimization for Groestl is possible Quote from: cbuchner1 on April 05, 2014, 04:55:02 PM we're working on a KILLER groestl, requiring a deeper understanding of the hash algo. When done, everything else will be toast.
This would turn quark, X11, groestl, myriad-groestl into CUDA coins.
open sourcing it would be a problem. Last time we did this (heavycoin) the AMD guys caught up within a few days... Christian
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Orrechorre
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April 09, 2014, 09:38:51 PM |
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how do I raise the diff so i can mine quark on a pool with gpu?
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cgminer-o
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1$ =1 MEC 2013 (2,56 $) 5$ =1MEC 2014 ?
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April 09, 2014, 10:08:16 PM |
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istvandv
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April 10, 2014, 03:37:02 AM |
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Maybe someone will add support for Aiden coin? https://bitcointalk.org/index.php?topic=558414.0Its supposed to be scrypt with nfactor 6, but the sgminer build they offer doesn't work for me on 5850 and 6970 And my attempts to use it badman builds are unsuccessful PS: -k zuikkis --nfactor 6 doesn't work, maybe i'm missing something? It seems there are hundreds of sgminer builds and all use slightly different syntax and/or features ![Sad](https://bitcointalk.org/Smileys/default/sad.gif) try that on the build from my github i have the exact same problem, im running 7850 on linux and ive tried fresh compilations of: veox 4.1.242 - gpu 0 kh/s and after quitting sgminer goes defuct and using 100% cpu zuikkis 4.1.153 - segmentation fault core dumped troky 4.1.153 - gpu 0 kh/s and after quitting sgminer goes defuct and using 100% cpu badman74 4.1.153 - gpu 0 kh/s and after quitting sgminer goes defuct and using 100% cpu yacminer 3.5.0-yac2 - share above target it doesnt seem to like older AMD cards running them all with nfactor 6
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restless
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April 10, 2014, 09:16:11 AM |
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Judaz49
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April 10, 2014, 01:50:11 PM |
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did anyone find a solution to 10% hashrate drop after 10mins of mining darkcoin with r9 290s?
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loonb
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April 10, 2014, 03:13:25 PM |
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Any working url to last ver?
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restless
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April 11, 2014, 07:56:49 AM |
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xfelinho
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April 11, 2014, 12:33:03 PM |
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Groestl is useless atm, cause Cuda Miner is 2-3x faster ![Undecided](https://bitcointalk.org/Smileys/default/undecided.gif)
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djm34
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April 11, 2014, 12:46:04 PM |
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Groestl is useless atm, cause Cuda Miner is 2-3x faster ![Undecided](https://bitcointalk.org/Smileys/default/undecided.gif) yep useless... ![Roll Eyes](https://bitcointalk.org/Smileys/default/rolleyes.gif) you should try to mine ~bcx~ instead, very rare coin and nvidia can't even get any....
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djm34 facebook pageBTC: 1NENYmxwZGHsKFmyjTc5WferTn5VTFb7Ze Pledge for neoscrypt ccminer to that address: 16UoC4DmTz2pvhFvcfTQrzkPTrXkWijzXw
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ol92
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April 11, 2014, 12:50:21 PM |
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Groestl is useless atm, cause Cuda Miner is 2-3x faster ![Undecided](https://bitcointalk.org/Smileys/default/undecided.gif) no : 780ti : 11Mh/s (don't know if oc or not) R9 290 : 9Mh/s (gpu@1100) R9 290 9.9 Mh/s (gpu @1100) amd sph miner beaten but not so much
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gpuminer
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April 11, 2014, 12:55:00 PM |
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Groestl is useless atm, cause Cuda Miner is 2-3x faster ![Undecided](https://bitcointalk.org/Smileys/default/undecided.gif) how about x11 ? Does Cuda Miner perform better than sph miner ?
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gpuminer
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April 11, 2014, 12:56:11 PM |
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Groestl is useless atm, cause Cuda Miner is 2-3x faster ![Undecided](https://bitcointalk.org/Smileys/default/undecided.gif) no : 780ti : 11Mh/s (don't know if oc or not) R9 290 : 9Mh/s (gpu@1100) R9 290 9.9 Mh/s (gpu @1100) amd sph miner beaten but not so much how about power consumption ? If put that into consideration , which is better ?
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