[XPM] Working on a GPU miner for Primecoin, new thread :)

[ivanlabrie]

It seems like memory corruption, the most annoying kind of bug. Might take some time to fix, I haven't been able to reproduce it on my computer.

This is a serious problem that may not have a fix.  I have a GPU that I still have running on SHA256 because it starts throwing massive errors if I try to use the same intensity on scrypt coins.

I don't think this is a GPU error, but rather an error in the CPU code somewhere.

Agreed.happens at stock clocks too and it's too much of a coincidence that all our cards are faulty.

[wyldfire]

Can this be used to mine in ypool?

I don't think so.  Ypool uses XPT exclusively, IIRC.  I think primecoin-reaper uses getwork, so someone would need to port XPT to it.

[Pt0x]

I just finished to read all the thread, I'm so happy that I didn't "donate".

I'm better without a GPU miner since CPU it's what I'm most using right now, however XPM needs the GPU miner to gain popularity otherwise it will remain as the botnet coin.

cheers!

[pyromaniac]

Please help me compile a file libblkmaker, so that I could use address different than mu1DxMiRUgzjNrVyVeHeRhqDm3XVK12SK2 in my config. I'm not a programmer.

[BazkieBumpercar]

Please help me compile a file libblkmaker, so that I could use address different than mu1DxMiRUgzjNrVyVeHeRhqDm3XVK12SK2 in my config. I'm not a programmer.

edit base58.c in the libblkmaker dir and add these middle lines:

      case   0:  // Bitcoin pubkey hash
      case  23:  // Primecoin pubkey hash
      case 111:  // Testnet pubkey hash

and

      case   5:  // Bitcoin script hash
      case  83:  // Primecoin script hash
      case 196:  // Testnet script hash

So, look up those bitcoin/testnet lines and add the primecoin one. Then compile (don't forget autogen.sh)

[mtrlt]

Please help me compile a file libblkmaker, so that I could use address different than mu1DxMiRUgzjNrVyVeHeRhqDm3XVK12SK2 in my config. I'm not a programmer.

edit base58.c in the libblkmaker dir and add these middle lines:

      case   0:  // Bitcoin pubkey hash
      case  23:  // Primecoin pubkey hash
      case 111:  // Testnet pubkey hash

and

      case   5:  // Bitcoin script hash
      case  83:  // Primecoin script hash
      case 196:  // Testnet script hash

So, look up those bitcoin/testnet lines and add the primecoin one. Then compile (don't forget autogen.sh)

You can also just redownload the library sources (from https://dl.dropboxusercontent.com/u/55025350/bitcoin-libblkmaker.zip). I have updated the source.

[pyromaniac]

Please help me compile a file libblkmaker, so that I could use address different than mu1DxMiRUgzjNrVyVeHeRhqDm3XVK12SK2 in my config. I'm not a programmer.

edit base58.c in the libblkmaker dir and add these middle lines:

      case   0:  // Bitcoin pubkey hash
      case  23:  // Primecoin pubkey hash
      case 111:  // Testnet pubkey hash

and

      case   5:  // Bitcoin script hash
      case  83:  // Primecoin script hash
      case 196:  // Testnet script hash

So, look up those bitcoin/testnet lines and add the primecoin one. Then compile (don't forget autogen.sh)

You can also just redownload the library sources (from https://dl.dropboxusercontent.com/u/55025350/bitcoin-libblkmaker.zip). I have updated the source.

Thanks! Now next problem is GPU is not used. How can I fix it?

Share thread started
GeneratePrimeTable() : prime table [1, 262144] generated with 23000 primes
Available CPU mining algorithms: hp7
Using default: hp7
Creating 2 CPU threads.
1...Warning: can't set thread priority
2...done
List of platforms:
        0       AMD Accelerated Parallel Processing
Using platform number 0
2013-09-05 19:08:29 Error: Error getting OpenCL device IDs

[balanghai]

Any successful blocks?

[wyldfire]

The TOTAL counts aren't comparable between use_gpu_fermat_test true/false, should look at 2-chains. I'll remove the TOTAL count in the next version.

Good to know, thanks! Looking at 2/3 chains then the gpu_fermat_test is faster by ~ 1.4x (I do have a weak CPU in there).  Is the candidate difference a red herring (1/9 as many) or just the way it is reported?

I'm just not seeing stats anything like this.

With the fermat test done on the GPU I get...
0 fermats/s, 6.73269 gandalfs/s.
70.2502k TOTAL     1.79828k 2-chains     39.093 3-chains     39.093 4-chains

With the fermat done on the CPU I get ...
60338.8 fermats/s, 3523.21 gandalfs/s.
350.383M TOTAL     1.01852M 2-chains     64.7127k 3-chains     3.58685k 4-chains     298.904 5-chains

Ignoring the total, the fermat test on the GPU gives 1000x fewer 2-chains,  and 100x fewer 4-chains.  This is with 2 x 7950, a AMD FX(tm)-4130 Quad-Core Processor, and ubunutu 13.

Am I missing something somewhere?

I got similar results enabling/disabling the fermat test on the GPU.

[mtrlt]

I've made the primality tester 4-5x faster, but I haven't managed to fix the "fractional assert" problem. Should I just release the faster version (many people won't be able to use it) or try to fix the bug first (will take time)?

[pgbit]

I've made the primality tester 4-5x faster, but I haven't managed to fix the "fractional assert" problem. Should I just release the faster version (many people won't be able to use it) or try to fix the bug first (will take time)?

Great work! Might be fairer to fix the bug, I am one of the ones who hasnt been able to use the miner yet though.

[pgbit]

I've made the primality tester 4-5x faster, but I haven't managed to fix the "fractional assert" problem. Should I just release the faster version (many people won't be able to use it) or try to fix the bug first (will take time)?

If this is of any help, looking at the console as all the data flies by, my setup (i7 chip, win8, 64bit) reels out all the data, starting with 0 fermats/sec and 786 gandalfs/s, then as time passes, the gandalfs/s progressively drops and if the app doesnt crash earlier each time the console reports the gandalfs/s it shows a smaller and smaller number, reducing to 60 gandalfs/s then it usually gives up and passes onto windows error reporting. It always only shows 0 fermats/s - ? what is this meant to be?

[mtrlt]

What GPU?

[y0m0]

I've made the primality tester 4-5x faster, but I haven't managed to fix the "fractional assert" problem. Should I just release the faster version (many people won't be able to use it) or try to fix the bug first (will take time)?

If this is of any help, looking at the console as all the data flies by, my setup (i7 chip, win8, 64bit) reels out all the data, starting with 0 fermats/sec and 786 gandalfs/s, then as time passes, the gandalfs/s progressively drops and if the app doesnt crash earlier each time the console reports the gandalfs/s it shows a smaller and smaller number, reducing to 60 gandalfs/s then it usually gives up and passes onto windows error reporting. It always only shows 0 fermats/s - ? what is this meant to be?

I had this same issue with the gandalfs dropping and I managed to keep it at a regular average number by playing around with the "worksize" parameter in the primecoin.conf , got the best result with 64

[wyldfire]

I've made the primality tester 4-5x faster, but I haven't managed to fix the "fractional assert" problem. Should I just release the faster version (many people won't be able to use it) or try to fix the bug first (will take time)?

If this is of any help, looking at the console as all the data flies by, my setup (i7 chip, win8, 64bit) reels out all the data, starting with 0 fermats/sec and 786 gandalfs/s, then as time passes, the gandalfs/s progressively drops and if the app doesnt crash earlier each time the console reports the gandalfs/s it shows a smaller and smaller number, reducing to 60 gandalfs/s then it usually gives up and passes onto windows error reporting. It always only shows 0 fermats/s - ? what is this meant to be?

I had this same issue with the gandalfs dropping and I managed to keep it at a regular average number by playing around with the "worksize" parameter in the primecoin.conf , got the best result with 64

I can confirm worksize of 64 was optimal for me too.

[pgbit]

What GPU?

7970 same prob with catalyst 13.4 and 13.8

[pgbit]

I've made the primality tester 4-5x faster, but I haven't managed to fix the "fractional assert" problem. Should I just release the faster version (many people won't be able to use it) or try to fix the bug first (will take time)?

If this is of any help, looking at the console as all the data flies by, my setup (i7 chip, win8, 64bit) reels out all the data, starting with 0 fermats/sec and 786 gandalfs/s, then as time passes, the gandalfs/s progressively drops and if the app doesnt crash earlier each time the console reports the gandalfs/s it shows a smaller and smaller number, reducing to 60 gandalfs/s then it usually gives up and passes onto windows error reporting. It always only shows 0 fermats/s - ? what is this meant to be?

I had this same issue with the gandalfs dropping and I managed to keep it at a regular average number by playing around with the "worksize" parameter in the primecoin.conf , got the best result with 64

I can confirm worksize of 64 was optimal for me too.

This does seem a improvement - thanks - this time runs from 1 - 5 mins.

[Entz]

Ignoring the total, the fermat test on the GPU gives 1000x fewer 2-chains,  and 100x fewer 4-chains.  This is with 2 x 7950, a AMD FX(tm)-4130 Quad-Core Processor, and ubunutu 13.

Am I missing something somewhere?

Likely not it may be my settings or some other factor (mingw compiled vs native linux etc). I have a very weak CPU in there (Celeron G530 I think) that gets maxed out when the CPU test is going (against 2 GPUs).
cpu_mining_threads  2,  worksize 64,  aggression 23,  sievepercentage 10, sievesize 25165824

CPU: 350.824k 2-chains     33.2151k 3-chains     3.13091k 4-chains     318.715 5-chains     18.7479 6-chains
GPU: 502.131k 2-chains     45.7112k 3-chains     4.8202k 4-chains     392.074 5-chains     46.1263 6-chains

I have a faster quad-core laying around, I will give that a try when I get a moment.

[ReCat]

http://howmuchmoneyhasmtrltmadefromtheprimecoingpuminer.housecat.name/

I totally promise that it is bias-free this time.

(I was bored.)

[Stinky_Pete]

http://howmuchmoneyhasmtrltmadefromtheprimecoingpuminer.housecat.name/

I totally promise that it is bias-free this time.

(I was bored.)

I'd be offended if I was offered only $27/hour for a professional job.