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Author Topic: [ANN][RIC] Riecoin: constellations POW *CPU* HARD FORK successful, world record  (Read 657513 times)
chryspano
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March 26, 2014, 01:42:20 PM
 #2581

Is a gpu miner posible for riecoin or its difficult as it was for primecoin ?

I believe that a gpu miner could help this coin, especially now that scrypt asics will move lots of miners to non scrypt coins
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March 26, 2014, 01:46:48 PM
 #2582

If I recall correctly, there was a GPU miner for primecoin that somebody claimed to be developing, and took donations for it, but never delivered.

As far as I know there still is no GPU miner for primecoin, mostly because the CPU is still needed to do certain things efficiently, but the communication time between the CPU and GPU killed any performance gains from the GPU running any part of the code. Or it was something to that effect, AFAIK.

If it would be possible to make a GPU miner I think that would be better long-term for this coin. CPU coins get dominated by botnets, drowning out potential profits from people running it legitimately, since botnet operators don't care about electricity costs. That kind of kills a lot of potential enthusiasm for it. There's only so many people in the world willing to lose money calculating prime numbers for fun.

Yeah - that was an infamous one.

Barring advances in the algorithmic techniques for RIC, the basics of RIC mining in the context of the GPU look like this.

Given a target number T determined by the diff and the blockchain hash:

  (a)  Round T up to T' where T' is a multiple of the primorial being used.  (easy - do once on CPU for every block).
  (b)  Compute T%p for every prime p being used to sieve
        Less easy:  Requires bigint math in various forms.
        Potentially optimizable:  Because the p's are all known in advance and never change, you can optimize this by computing on the CPU once per difficulty 1/p, and then use this to compute T%p using multiplication.
        Requires:  Decently fast bigint multiplication on GPU
        http://www.hpcs.cs.tsukuba.ac.jp/~nakayama/cump/index.php?CUMP%20Performance%20Evaluation
 
        Note the 1000 decimal digit number results:  Slower than a dual proc opteron.  (!)
        But perhaps there's some speedup hiding in there if you do many of them in parallel.

  (c)  Sieve - write zeros to the sieve at the locations indicated by T%p.
        Easy:  Optimizing this is standard GPGPU programming.  It's not trivial, but there are a lot of people who could do it.

  (d)  Test candidates:
        Potentially painful:  Requires modular exponentiation  on the GPU   (2^(n-1) % n).
        Algorithmic competitiveness with GMP probably requires using montgomery reduction.

This is quite a bit of work.  There's nothing in this list that is impossible, but it's a substantial engineering challenge to make it worthwhile.  Otherwise, even though the GPU has more horsepower, the algorithmic and engineering advantages of GMP will dominate.

There are some fun possibilities for doing this - i.e., because a lot of the pain in the bigint is handling variable-length things, you could just synthesize the kernel when a new block arrives (or a new diff arrives).  But it's the kind of stuff that an expert at could go get a lot more money from security applications than hacking for a cryptocurrency. :-)

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March 26, 2014, 02:32:36 PM
 #2583

Sigh I never thought it would hit below 20, idk what people are thinking
northranger79510
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March 26, 2014, 03:46:30 PM
 #2584

I wanted to whole hardheartedly support this coin, but a lack of posts from the dev, the utterly crazy diff, and the lack of pool software has killed this coin before it got started.

GL with it, but I doubt it will go anywhere now


Yeah, I'm about to give up too. It's just MaxCoin v2.o -- Why release something when you've yet to have it all prepared. People much rather wait an additional week to have the coin prepared, fair, and the devs not as busy.

we call this pre-mine  Grin


You guys got to realize that the dev. has a life too. It's not like he is getting paid for developing this. Nor does he have a professional team hired like Maxcoin..you should just appreciate the fact that this coin isn't another shitcoin cloned and changed the name. The dev. does post things..I really don't understand where you get the lack of posts from. He has a life and work. If you'd like to pay 100k a year for him to quit him job and work on this full time, I'm sure he'll have time and devote himself to this. If not, then please don't criticize him from lack of posts because that isn't true. He replies on here when it comes to difficult technical question but leaves it to the community members when questions are general. Plus, (sorry if you didn't know), he said he would update once a week on every Thursdays. Crazy difficulty is normal. It's better with a crazy difficulty coin like Riecoin. Makes it last longer. You don't want a coin like Quark where you can mine almost everything in half a year.. You want a sustainable coin like Datacoin (takes hundreds of year to mine everything), Riecoin (decades), and other various coins that takes a long time so that when the public is notified of cryptocurrency and is accepted by the masses, it will have enough supply.

This coin is an experiment. To have something "perfect" and prepared is asking too much and having too much expectation. Bitcoin wasn't fair, why aren't you complaining about that. Dozens of coin weren't "prepared", but they still made it to the top. Delaying a coin for a week doesn't really help make the coin more "fair" because the problem isn't as simple as you think and could be fixed in a week.

Overall, give the developer time. It hasn't even been 2-3 days since he posted about the updates. Being a developer is tiring and demanding work. If you aren't a full time dev., you can't really understand how overloaded he is right now.

Life is not fair. Deal with it. What's fair to one cannot be fair to another group. This coin is far from pre-mined because the first day output 0 coins.

Huntercoin: H9kttkrQidiQMG9NibmTgjgCKqWJMAkAXD
Riecoin: Like us on https://www.facebook.com/TheRiecoinCommunity
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March 26, 2014, 03:56:30 PM
 #2585

Those quotes were from February  Wink

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March 26, 2014, 04:18:33 PM
 #2586

Bringing up quotes from February hardly seems relevant now... Anyway we'll keep pushing ahead, moving on the foundation, getting advertising and PR going and break some freaking records!
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March 26, 2014, 04:23:03 PM
 #2587

Those quotes were from February  Wink

Lol. So they were trolls...didn't notice.

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March 26, 2014, 04:43:56 PM
 #2588

I wish I could support =[ idk how I got no technical skills=[
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March 26, 2014, 04:52:43 PM
 #2589

I wish I could support =[ idk how I got no technical skills=[

What kind of skills do you have? At Riecoin Foundation, we are always looking for new talents.

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March 26, 2014, 05:22:24 PM
 #2590

B.S Finance, M.S Computer Science (new), & M.S Chemical Biology pick one lmao
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March 26, 2014, 05:30:11 PM
 #2591

B.S Finance, M.S Computer Science (new), & M.S Chemical Biology pick one lmao

Impressive. I'd rather see skill-sets than degrees though. Nevertheless, if you'd like, the Riecoin Foundation welcomes you with open arms.

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March 26, 2014, 06:34:33 PM
 #2592

If I recall correctly, there was a GPU miner for primecoin that somebody claimed to be developing, and took donations for it, but never delivered.

As far as I know there still is no GPU miner for primecoin, mostly because the CPU is still needed to do certain things efficiently, but the communication time between the CPU and GPU killed any performance gains from the GPU running any part of the code. Or it was something to that effect, AFAIK.

If it would be possible to make a GPU miner I think that would be better long-term for this coin. CPU coins get dominated by botnets, drowning out potential profits from people running it legitimately, since botnet operators don't care about electricity costs. That kind of kills a lot of potential enthusiasm for it. There's only so many people in the world willing to lose money calculating prime numbers for fun.

Yeah - that was an infamous one.

Barring advances in the algorithmic techniques for RIC, the basics of RIC mining in the context of the GPU look like this.

Given a target number T determined by the diff and the blockchain hash:

  (a)  Round T up to T' where T' is a multiple of the primorial being used.  (easy - do once on CPU for every block).
  (b)  Compute T%p for every prime p being used to sieve
        Less easy:  Requires bigint math in various forms.
        Potentially optimizable:  Because the p's are all known in advance and never change, you can optimize this by computing on the CPU once per difficulty 1/p, and then use this to compute T%p using multiplication.
        Requires:  Decently fast bigint multiplication on GPU
        http://www.hpcs.cs.tsukuba.ac.jp/~nakayama/cump/index.php?CUMP%20Performance%20Evaluation
 
        Note the 1000 decimal digit number results:  Slower than a dual proc opteron.  (!)
        But perhaps there's some speedup hiding in there if you do many of them in parallel.

  (c)  Sieve - write zeros to the sieve at the locations indicated by T%p.
        Easy:  Optimizing this is standard GPGPU programming.  It's not trivial, but there are a lot of people who could do it.

  (d)  Test candidates:
        Potentially painful:  Requires modular exponentiation  on the GPU   (2^(n-1) % n).
        Algorithmic competitiveness with GMP probably requires using montgomery reduction.

This is quite a bit of work.  There's nothing in this list that is impossible, but it's a substantial engineering challenge to make it worthwhile.  Otherwise, even though the GPU has more horsepower, the algorithmic and engineering advantages of GMP will dominate.

There are some fun possibilities for doing this - i.e., because a lot of the pain in the bigint is handling variable-length things, you could just synthesize the kernel when a new block arrives (or a new diff arrives).  But it's the kind of stuff that an expert at could go get a lot more money from security applications than hacking for a cryptocurrency. :-)

Nvidia GTX 780 Ti Classified + Intel i7-4770k

(initialization) Single static array of primes and modular multiplicative inverses stored on the GPU (16,777,216 x 2 items interleaved)

(a) Done on the CPU 173#  (check)
(b) Only the first offsets for (p) are calculated on the CPU (p+4, p+6, p+10, p+12, and p+16 are calculated on the GPU with 64-bit integers only)
(c) Done on the GPU using shared memory, slightly faster than the CPU implementation. (check)
(d) Done on the GPU. Modular multiplication code (Montgomery Reduction - CIOS) is generated using my Python script for various fixed precision - dynamically loaded at run-time during difficulty changes. See sample output below for 320-bit precision.
      Modular exponentiation uses square-and-double because I am using a base of 2, otherwise I would have been forced to use square-and-multiply which is much slower.

Benchmarking the modular multiplication by itself is 12x faster than using GMP with 8 threads on the i7-4770k. However, because of some compiler issues resulting in low occupancy, the entire application is currently only 3x faster on the GPU, but the target goal is 6x. I will have some time to resolve this issue in May.

__device__ void
nvidia_gfn_multiply(nvidia_word_t *rop, const int rop_interleaved,
               const nvidia_word_t *op1, const int op1_interleaved,
               const nvidia_word_t *op2, const int op2_interleaved,
               nvidia_word_t *nvidia_gfn_n)
{
   nvidia_gfn_t r;
   nvidia_word_t q;
   nvidia_word_t c0=0, c1;
   nvidia_word_t tasm=0;
     
   r[0]=0;
   r[1]=0;
   r[2]=0;
   r[3]=0;
   r[4]=0;
   r[5]=0;
   r[6]=0;
   r[7]=0;
   r[8]=0;
   r[9]=0;

   tasm=0;
   asm( "add.cc.u32 %0, %0, %1;" : "+r"(r[0]) : "r"(tasm));
   asm( "madc.hi.u32 %0, %1, %2, 0;" : "=r"(tasm) : "r"(op1[0*op1_interleaved]), "r"(op2[0*op2_interleaved]));
   asm( "mad.lo.cc.u32 %0, %1, %2, %0;" : "+r"(r[0]) : "r"(op1[0*op1_interleaved]), "r"(op2[0*op2_interleaved]));
   asm( "addc.u32 %0, %0, 0;" : "+r"(tasm));
   asm( "add.cc.u32 %0, %0, %1;" : "+r"(r[1]) : "r"(tasm));
   asm( "madc.hi.u32 %0, %1, %2, 0;" : "=r"(tasm) : "r"(op1[1*op1_interleaved]), "r"(op2[0*op2_interleaved]));
   asm( "mad.lo.cc.u32 %0, %1, %2, %0;" : "+r"(r[1]) : "r"(op1[1*op1_interleaved]), "r"(op2[0*op2_interleaved]));
   asm( "addc.u32 %0, %0, 0;" : "+r"(tasm));
   asm( "add.cc.u32 %0, %0, %1;" : "+r"(r[2]) : "r"(tasm));
   asm( "madc.hi.u32 %0, %1, %2, 0;" : "=r"(tasm) : "r"(op1[2*op1_interleaved]), "r"(op2[0*op2_interleaved]));
   asm( "mad.lo.cc.u32 %0, %1, %2, %0;" : "+r"(r[2]) : "r"(op1[2*op1_interleaved]), "r"(op2[0*op2_interleaved]));
   asm( "addc.u32 %0, %0, 0;" : "+r"(tasm));
   asm( "add.cc.u32 %0, %0, %1;" : "+r"(r[3]) : "r"(tasm));
   asm( "madc.hi.u32 %0, %1, %2, 0;" : "=r"(tasm) : "r"(op1[3*op1_interleaved]), "r"(op2[0*op2_interleaved]));
   asm( "mad.lo.cc.u32 %0, %1, %2, %0;" : "+r"(r[3]) : "r"(op1[3*op1_interleaved]), "r"(op2[0*op2_interleaved]));
   asm( "addc.u32 %0, %0, 0;" : "+r"(tasm));
   asm( "add.cc.u32 %0, %0, %1;" : "+r"(r[4]) : "r"(tasm));
   asm( "madc.hi.u32 %0, %1, %2, 0;" : "=r"(tasm) : "r"(op1[4*op1_interleaved]), "r"(op2[0*op2_interleaved]));
   asm( "mad.lo.cc.u32 %0, %1, %2, %0;" : "+r"(r[4]) : "r"(op1[4*op1_interleaved]), "r"(op2[0*op2_interleaved]));
   asm( "addc.u32 %0, %0, 0;" : "+r"(tasm));
   asm( "add.cc.u32 %0, %0, %1;" : "+r"(r[5]) : "r"(tasm));
   asm( "madc.hi.u32 %0, %1, %2, 0;" : "=r"(tasm) : "r"(op1[5*op1_interleaved]), "r"(op2[0*op2_interleaved]));
   asm( "mad.lo.cc.u32 %0, %1, %2, %0;" : "+r"(r[5]) : "r"(op1[5*op1_interleaved]), "r"(op2[0*op2_interleaved]));
   asm( "addc.u32 %0, %0, 0;" : "+r"(tasm));
   asm( "add.cc.u32 %0, %0, %1;" : "+r"(r[6]) : "r"(tasm));
   asm( "madc.hi.u32 %0, %1, %2, 0;" : "=r"(tasm) : "r"(op1[6*op1_interleaved]), "r"(op2[0*op2_interleaved]));
   asm( "mad.lo.cc.u32 %0, %1, %2, %0;" : "+r"(r[6]) : "r"(op1[6*op1_interleaved]), "r"(op2[0*op2_interleaved]));
   asm( "addc.u32 %0, %0, 0;" : "+r"(tasm));
   asm( "add.cc.u32 %0, %0, %1;" : "+r"(r[7]) : "r"(tasm));
   asm( "madc.hi.u32 %0, %1, %2, 0;" : "=r"(tasm) : "r"(op1[7*op1_interleaved]), "r"(op2[0*op2_interleaved]));
   asm( "mad.lo.cc.u32 %0, %1, %2, %0;" : "+r"(r[7]) : "r"(op1[7*op1_interleaved]), "r"(op2[0*op2_interleaved]));
   asm( "addc.u32 %0, %0, 0;" : "+r"(tasm));
   asm( "add.cc.u32 %0, %0, %1;" : "+r"(r[8]) : "r"(tasm));
   asm( "madc.hi.u32 %0, %1, %2, 0;" : "=r"(tasm) : "r"(op1[8*op1_interleaved]), "r"(op2[0*op2_interleaved]));
   asm( "mad.lo.cc.u32 %0, %1, %2, %0;" : "+r"(r[8]) : "r"(op1[8*op1_interleaved]), "r"(op2[0*op2_interleaved]));
   asm( "addc.u32 %0, %0, 0;" : "+r"(tasm));
   asm( "add.cc.u32 %0, %0, %1;" : "+r"(r[9]) : "r"(tasm));
   asm( "madc.hi.u32 %0, %1, %2, 0;" : "=r"(tasm) : "r"(op1[9*op1_interleaved]), "r"(op2[0*op2_interleaved]));
   asm( "mad.lo.cc.u32 %0, %1, %2, %0;" : "+r"(r[9]) : "r"(op1[9*op1_interleaved]), "r"(op2[0*op2_interleaved]));
   asm( "addc.u32 %0, %0, 0;" : "+r"(tasm));
   asm( "add.cc.u32 %0, %0, %1;" : "+r"(c0) : "r"(tasm) );
   asm( "addc.u32 %0, 0, 0;" : "=r"(c1));

             ...

nvidia_word_t overflow;
   asm ( "sub.cc.u32 %0, %0, %1;" : "+r"(r[0]) : "r"(nvidia_gfn_n[0]) );
   asm ( "subc.cc.u32 %0, %0, %1;" : "+r"(r[1]) : "r"(nvidia_gfn_n[1]) );
   asm ( "subc.cc.u32 %0, %0, %1;" : "+r"(r[2]) : "r"(nvidia_gfn_n[2]) );
   asm ( "subc.cc.u32 %0, %0, %1;" : "+r"(r[3]) : "r"(nvidia_gfn_n[3]) );
   asm ( "subc.cc.u32 %0, %0, %1;" : "+r"(r[4]) : "r"(nvidia_gfn_n[4]) );
   asm ( "subc.cc.u32 %0, %0, %1;" : "+r"(r[5]) : "r"(nvidia_gfn_n[5]) );
   asm ( "subc.cc.u32 %0, %0, %1;" : "+r"(r[6]) : "r"(nvidia_gfn_n[6]) );
   asm ( "subc.cc.u32 %0, %0, %1;" : "+r"(r[7]) : "r"(nvidia_gfn_n[7]) );
   asm ( "subc.cc.u32 %0, %0, %1;" : "+r"(r[8]) : "r"(nvidia_gfn_n[8]) );
   asm ( "subc.cc.u32 %0, %0, %1;" : "+r"(r[9]) : "r"(nvidia_gfn_n[9]) );
   asm ( "subc.u32 %0, %1, 0;" : "=r"(overflow) : "r"(c0) );
   
   if (overflow!=0)
   {     
      asm ( "add.cc.u32 %0, %0, %1;" : "+r"(r[0]) : "r"(nvidia_gfn_n[0]) );
      asm ( "addc.cc.u32 %0, %0, %1;" : "+r"(r[1]) : "r"(nvidia_gfn_n[1]) );
      asm ( "addc.cc.u32 %0, %0, %1;" : "+r"(r[2]) : "r"(nvidia_gfn_n[2]) );
      asm ( "addc.cc.u32 %0, %0, %1;" : "+r"(r[3]) : "r"(nvidia_gfn_n[3]) );
      asm ( "addc.cc.u32 %0, %0, %1;" : "+r"(r[4]) : "r"(nvidia_gfn_n[4]) );
      asm ( "addc.cc.u32 %0, %0, %1;" : "+r"(r[5]) : "r"(nvidia_gfn_n[5]) );
      asm ( "addc.cc.u32 %0, %0, %1;" : "+r"(r[6]) : "r"(nvidia_gfn_n[6]) );
      asm ( "addc.cc.u32 %0, %0, %1;" : "+r"(r[7]) : "r"(nvidia_gfn_n[7]) );
      asm ( "addc.cc.u32 %0, %0, %1;" : "+r"(r[8]) : "r"(nvidia_gfn_n[8]) );
      asm ( "addc.u32 %0, %0, %1;" : "+r"(r[9]) : "r"(nvidia_gfn_n[9]));
   }
   rop[0*rop_interleaved]=r[0];
   rop[1*rop_interleaved]=r[1];
   rop[2*rop_interleaved]=r[2];
   rop[3*rop_interleaved]=r[3];
   rop[4*rop_interleaved]=r[4];
   rop[5*rop_interleaved]=r[5];
   rop[6*rop_interleaved]=r[6];
   rop[7*rop_interleaved]=r[7];
   rop[8*rop_interleaved]=r[8];
   rop[9*rop_interleaved]=r[9];
}

Electrical Engineering & Computer Science
http://www.eecs.mit.edu/
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March 26, 2014, 06:49:40 PM
 #2593

B.S Finance, M.S Computer Science (new), & M.S Chemical Biology pick one lmao

Impressive. I'd rather see skill-sets than degrees though. Nevertheless, if you'd like, the Riecoin Foundation welcomes you with open arms.

Hence I wish i had "skills" idk what is considered useful 'skills"
You can determine what could be useful based on the broadness idk what is deemed useful thats the issue! Lol


Man today is a sad day, people are running the bank.
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March 26, 2014, 08:38:21 PM
 #2594

Congrats, folks - Riecoin is at record difficulty again (1615):

http://www.cs.cmu.edu/~dga/crypto/ric/diff_offset_2014_03_24.png

It looks like it should continue rising a bit - there are still some older miners left and if they get upgraded, they might be enough to push it a little higher.

1705 this morning
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March 27, 2014, 01:50:28 AM
 #2595

we need to destroy this wall
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March 27, 2014, 03:14:53 AM
 #2596

iv bought alot of coins already, i really cant keep up with this dumping-__- wish i had more BTC =[
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March 27, 2014, 03:19:18 AM
 #2597

iv bought alot of coins already, i really cant keep up with this dumping-__- wish i had more BTC =[

Same...If I had 1000 BTC..I would honestly put 500 in RIC just to massive buy wall.

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surfer43
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March 27, 2014, 03:24:29 AM
 #2598

I will be putting some more into Riecoin at this low price... Only time before the next spike in price.

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March 27, 2014, 04:54:47 AM
 #2599

my buy wall lasted only ~20 hours before cut down by heavy sellers who knows why *shrug*
northranger79510
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March 27, 2014, 05:16:56 AM
 #2600

Its ok. If prices drop below .0001, I promise I will go into my cold storage and buy 50-100k RIC

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