An (even more) optimized version of cpuminer (pooler's cpuminer, CPU-only)

[Meizirkki]

Wow!

My prevous minerd did 1.8Kh/s per core. This new one does 3.9Kh/s per core!

Thanks

P.S. Core2duo SU7300

[Tittiez]

Phenom ii x4 955 @ 3.6GHz

[pooler]

Alright folks, time for a version bump.

Version 2.1.3

• Support for extensions "midstate" (reduces network bandwidth usage) and "submitold" (used by p2pool).
• Smart handling of long polling failures: switch to short scantime if long polling fails.
• It is now possible to specify username and password in the URL, like this: --url http://username:password@host:port/.
• Added a --version option, and (finally) cleaned up the output of the --help option.
• The miner will now complain about non-option arguments, instead of simply ignoring them.
• Minor bug fixes.

The source code is, as always, available at GitHub. No binaries yet, sorry, I couldn't find diki on IRC. Windows binaries here.

Brief note on the -s/--scantime option
I have seen people suggest various values for this option in order to reduce stales when mining in pools.
The funny thing is that, to my knowledge, all Litecoin pools have long polling permanently enabled (which is good), and when long polling is enabled the scantime parameter is completely ignored.
For this reason, the use of this parameter only makes sense when you are mining solo.

[MCWey8]

2.1.3 Linux - Intel(R) Pentium(R) Dual  CPU  E2180  @ 2.00GHz - 5.7 KHs

2.1.2 Windows - Intel(R) Pentium(R) Dual  CPU  T6400  @ 2.00GHz - 6.0 KHs

2.1.2 Windows - AMD C-50 Dual @ 1.00GHz - 1.36 KHs

2.1.3 Linux - AMD Athlon @ 700MHz - 0.4 KHs

[pooler]

Binaries of version 2.1.3 for Windows are now available.
https://github.com/pooler/cpuminer/downloads

UPDATE: A 64-bit binary for Mac OS X is now also available.

[stcupp]

this took my AMD AM2+ phenemon from 4 kh/s to 16 kh/s!

[hangover]

hangover: this version should build correctly with binutils 2.15. Let me know if the assembler still complains.

pooler, everything builds correctly, thank you!

[cabin]

I notice at 100% CPU it does cut into the GPU hash rate for bitcoin a little (on the same machine). I wonder if an option for 'intensity' could be added so it could be configured to use only 95% CPU?

[heinz]

use 1 less thread. Works good on my i7's

[cabin]

that's what I've been doing.. but it's a little harsh when there's only 2 cores

[ZedZedNova]

If you are running linux or Mac OS X you can use the "nice" command to alter how the process is scheduled.

Windows has something similar, but I don't recall what it is. Probably accessible from Perfmon or Resource Monitor.

- Zed

[Remember remember the 5th of November]

Yes, in Task Manager, there is something called Priority, you can set it to whatever you like, but NEVER to real-time.

[LoWang]

or you can use command start to launch a program with a set priority
start "title" /low command

[cabin]

This is on windows and the process priority is already as low as it can go. Anyways not a big deal overall.

[pooler]

This is on windows and the process priority is already as low as it can go. Anyways not a big deal overall.

You may want to try out one of these free utilities, that allow you to limit the maximum CPU usage of a process:
http://deztec.jp/x/05/faireal/BES-index.html
http://threadmaster.tripod.com/

[Syke]

(Just looked into this "LiteCoin" thing today) Followed the instructions on pool-x for my i7-2600k, got 8.8 khash total for 4 cores.

Just replaced the default files with your ones, now getting 10.5 khash, PER CORE, for a total of 42.0 khash

Wow   

How in the world are you getting 10.5 KH/s per core?

[shakti]

(Just looked into this "LiteCoin" thing today) Followed the instructions on pool-x for my i7-2600k, got 8.8 khash total for 4 cores.

Just replaced the default files with your ones, now getting 10.5 khash, PER CORE, for a total of 42.0 khash

Wow   

How in the world are you getting 10.5 KH/s per core?

4 threads on i7 2600k can give 10.5 kh/s pro thread

[dishwara]

(Just looked into this "LiteCoin" thing today) Followed the instructions on pool-x for my i7-2600k, got 8.8 khash total for 4 cores.

Just replaced the default files with your ones, now getting 10.5 khash, PER CORE, for a total of 42.0 khash

Wow   

How in the world are you getting 10.5 KH/s per core?

4 threads on i7 2600k can give 10.5 kh/s pro thread

?

[LoWang]

(Just looked into this "LiteCoin" thing today) Followed the instructions on pool-x for my i7-2600k, got 8.8 khash total for 4 cores.

Just replaced the default files with your ones, now getting 10.5 khash, PER CORE, for a total of 42.0 khash

Wow  

I just installed 64bit Linux on core i5 2400 @3.1GHz and it runs up to 30kh/s! So I think this is possible to achieve with i7. Fuzzy did you notice if turboboost activates or not? According to Intel it can go up to 3.8GHz
http://ark.intel.com/products/52214/Intel-Core-i7-2600K-Processor-(8M-Cache-3_40-GHz)
Unfortunatelly I was not able to run lm-sensors on that Linux so I cannot check.

[tacotime]

I got 46kh/s on a 2600K @ 4.5GHz after compiling the miner on ubuntu (which was a pain in the ass).