New demonstration CPU miner available

[jgarzik]

Just pushed out v0.2.1 to cpuminer.git, and updated the Windows installer:
http://yyz.us/bitcoin/cpuminer-installer-0.2.1.zip

SHA1: d85390e1bb4da94b84f0968d0c98590f4be22f39  cpuminer-installer-0.2.1.zip
MD5: 02bcd0b22fa62499e96244ebd86efcd5  cpuminer-installer-0.2.1.zip

Windows users should see a slight increase in khash/sec, due to improved optimization.

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[Cdecker]

I wonder what this might mean:

checking for json_loads in -ljansson... no
checking for pthread_create in -lpthread... yes
./configure: line 4305: syntax error near unexpected token `LIBCURL_CHECK_CONFIG'
./configure: line 4305: `LIBCURL_CHECK_CONFIG(, 7.10.1, ,'

Any ideas?

[jgarzik]

I wonder what this might mean:

checking for json_loads in -ljansson... no
checking for pthread_create in -lpthread... yes
./configure: line 4305: syntax error near unexpected token `LIBCURL_CHECK_CONFIG'
./configure: line 4305: `LIBCURL_CHECK_CONFIG(, 7.10.1, ,'

Any ideas?

autogen.sh did not find the necessary libcurl autoconf magic to build your configure script.  Thus, instead of transforming the macro LIBCURL_CHECK_CONFIG into something useful, it left it as-is.

So, your libcurl install is missing some pieces (or autogen.sh cannot find them).

[prometheus]

Fantastic work.  Are you able to get the 4way algorithm into the main client?  It performs twice as well as the main client's algorithm on intel hardware, and seems to be working terrific on the AMD hardware.

[jgarzik]

Fantastic work.  Are you able to get the 4way algorithm into the main client?  It performs twice as well as the main client's algorithm on intel hardware, and seems to be working terrific on the AMD hardware.

4way is in the main client already -- albeit Linux-only, if I understand correctly.  That's an open project for someone to tackle, if they're interested.

[jgarzik]

Version 0.2.2 released:
- VIA padlock works (lfm)
- minor bug fixes (lfm)

SHA1: b7ffda89f3b76302b948a715905105b4cf0c080f  cpuminer-installer-0.2.2.zip
MD5: 716f883b92e93082e2dfa9a3130972cb  cpuminer-installer-0.2.2.zip

See top of thread for URLs.

[lfm]

note if you wanted to do a full difficulty test rather than returning the preliminary "proof of work" to the server, its not hard, I think this would work:

Code:

/* do full difficulty test of hash */

#define OFF 75

int fulltest(void * block, void *hash)
{
  unsigned char *blk = block;  // 80 bytes
  unsigned char *hsh = hash;   // 32 bytes
  int i;
  int shift = blk[OFF] - 2;

  for (i = 31; i > shift && i >= 0; i--)
    if (hsh[i] != 0)
      return 0;

  if (shift < 32)
    for (i = 0; i < 3 && shift >= i; i++) {
      if (hsh[shift - i] > blk[OFF - 1 - i])
        return 0;
      if (hsh[shift - i] < blk[OFF - 1 - i])
        return 1;
    }

  return 1;
}

[jgarzik]

A test version of cpuminer, with crypto++ 32-bit assembly implementation, has been pushed out to git, and a test installer for Windows uploaded at http://yyz.us/bitcoin/cpuminer-installer-0.2.2test.zip

SHA1: c105454954b63c4f846ced958b553c87182b88e5  cpuminer-installer-0.2.2test.zip
MD5: ce5fd9d17167080892b8d9c06f582660  cpuminer-installer-0.2.2test.zip

I'm interested if this works at all.  Should be faster for Windows users than the current Crypto++ implementation, I'm guessing.

[BitLex]

I'm interested if this works at all.

it does, installs and runs nice as usual,
on my PhenomII X3 it's
slightly faster using 'c' 1070khash/s (+50)
but slower using '4way' 1440khash/s (-960), which is also the case in version 0.2.2, haven't tested that one before.

so, with 0.2.1 '4way' i get 2400,
0.2.2-0.2.2test '4way' i get 1440.

you broke it.      
    
and yes, it's all single threads.

[jgarzik]

I'm interested if this works at all.

it does, installs and runs nice as usual,

Did you test 'cryptopp_asm32' algorithm?

so, with 0.2.1 '4way' i get 2400,
0.2.2-0.2.2test '4way' i get 1440.

hmmm.  On my side, I upgraded Fedora 13 to Fedora 14, and changed -O2 to -O3 in compile flags.  Gotta wonder what changed

I should also look into a better CPU architecture setting than the default.

[BitLex]

Did you test 'cryptopp_asm32' algorithm?

sorry, the slow 4way-algo confused me a bit, so i totally missed to post those,
yes i did.

cryptopp = 890khash/s
cryptopp_asm32 = 1350khash/s

[jgarzik]

cryptopp_asm32 = 1350khash/s

This is faster than standard bitcoin client, yes?

Anyway, how much patience do you have for testing?    Other readers.. your help in comparing 0.2 versus 0.2.2test* speed is welcomed.  Here is a matrix of options, to see if 4way can be improved:

Compiler flags	URL
-O2 -msse2	http://yyz.us/bitcoin/cpuminer-installer-0.2.2test-o2.zip
-O2 -march=pentium4 -msse2	http://yyz.us/bitcoin/cpuminer-installer-0.2.2test-o2-pentium4.zip
-O2 -march=k8	http://yyz.us/bitcoin/cpuminer-installer-0.2.2test-o2-k8.zip
-O3 -msse2	http://yyz.us/bitcoin/cpuminer-installer-0.2.2test-o3.zip
-O3 -march=pentium4 -msse2	http://yyz.us/bitcoin/cpuminer-installer-0.2.2test-o3-pentium4.zip
-O3 -march=k8	http://yyz.us/bitcoin/cpuminer-installer-0.2.2test-o3-k8.zip

[BitLex]

Phenom II X3 720 2.8GHz XP x64

--algo=4way --threads=1

0.2.2test-o2 = 1450
0.2.2test-o2-pentium4 = 1438
0.2.2test-o2-k8 = 1450
0.2.2test-o3 = 1450
0.2.2test-o3-pentium4 = 1438
0.2.2test-o3-k8 = 1450

 

0.2.1 = 2418.34 interesting on this one is, that it's not fluctuating,
all others go up and down by 1-few khash, 0.2.1 isnt, it's rockstable at 2418.34,
except the CPU is doing some other stuff, then it drops a bit too.

[jgarzik]

Thanks for testing.  Here's another test, integrating the 4way algorithm and removing the others:
     http://yyz.us/bitcoin/cpuminer-installer-0.2.2test-4way-only.zip

Unlikely to change anything, but it seems that we are narrowing this down to gcc 4.4 -> gcc 4.5 changes in Fedora 13 -> 14.

[slush]

Hi jgarzik, getting problem with configure on pretty old CentOS 5. Any idea, please? 

[root@virt10 jgarzik-cpuminer-080ddb6]# ./autogen.sh
[root@virt10 jgarzik-cpuminer-080ddb6]# ./configure
checking for a BSD-compatible install... /usr/bin/install -c
checking whether build environment is sane... yes
...
checking pkg-config is at least version 0.9.0... yes
./configure: line 4516: syntax error near unexpected token `,'
./configure: line 4516: `LIBCURL_CHECK_CONFIG(, 7.10.1, ,'

[jgarzik]

Hi jgarzik, getting problem with configure on pretty old CentOS 5. Any idea, please? 

./configure: line 4516: `LIBCURL_CHECK_CONFIG(, 7.10.1, ,'

Scroll up to this post, in the current thread.  Your libcurl devel pkg is missing, or your libcurl devel pkg is missing autoconf macros.

[slush]

Thanks. I tried to find solution here before post, but missed this comment 

Scroll up to this post, in the current thread.  Your libcurl devel pkg is missing, or your libcurl devel pkg is missing autoconf macros.

[tuxsoul]

Hi,

I created a debian/ubuntu package from this app, if somebody will like test or support this package, give feedbacks here:
http://bitcointalk.org/index.php?topic=2207.0

Sorry my english is bad.
Greeting's.

[pc]

I've compiled a binary for 64-bit Intel Mac and have it posted at http://dl.dropbox.com/u/16187822/minerd

It gives better performance than the native Bitcoin client on CPU generation, and even better with 4way on my system that has a processor that supports it. I couldn't get 4way to work in the native Bitcoin client, so I'm glad that I've got a chance to use it. It's not enough to compete with some of those GPU monsters, but every hash counts, right?

[Azetab]

hey, can someone upload a binary zip version of the cpu miner?