This is a multi-threaded multi-pool CPU and GPU miner for bitcoin and
derivative coins.
GIT TREE:
https://github.com/ckolivas/cgminer
Support thread:
http://forum.bitcoin.org/index.php?topic=28402.0
IRC Channel:
irc://irc.freenode.net/cgminer
License: GPLv2. See COPYING for details.
Dependencies:
libcurl http://curl.haxx.se/libcurl/
libncurses5-dev (or libpdcurses on WIN32)
pkg-config http://www.freedesktop.org/wiki/Software/pkg-config
jansson http://www.digip.org/jansson/
(jansson is included in-tree and not necessary)
Basic *nix build instructions:
To build with GPU mining support:
Install AMD APP sdk, latest version - there is no official place to
install it so just keep track of where it is if you're not installing
the include files and library files into the system directory.
(Do NOT install the ati amd sdk if you are on nvidia)
The easiest way to install the ATI AMD SPP sdk on linux is to actually put it
into a system location. Then building will be simpler. Download the correct
version for either 32 bit or 64 bit from here:
http://developer.amd.com/sdks/AMDAPPSDK/downloads/Pages/default.aspx
This will give you a file with a name like AMD-APP-SDK-v2.4-lnx64.tgz
Then:
sudo su
cd /opt
tar xf /path/to/AMD-APP-SDK-v2.4-lnx64.tgz
cd /
tar xf /opt/AMD-APP-SDK-v2.4-lnx64/icd-registration.tgz
ln -s /opt/AMD-APP-SDK-v2.4-lnx64/include/CL /usr/include
ln -s /opt/AMD-APP-SDK-v2.4-lnx64/lib/x86_64/* /usr/lib/
ldconfig
If you are on 32 bit, x86_64 in the 2nd last line should be x86
To actually build:
./autogen.sh # only needed if building from git repo
CFLAGS="-O2 -Wall -march=native" ./configure
or if you haven't installed the ati files in system locations:
CFLAGS="-O2 -Wall -march=native -I<path to AMD APP include>" LDFLAGS="-L<path to AMD APP lib/x86_64> ./configure
make
If it finds the opencl files it will inform you with
"OpenCL: FOUND. GPU mining support enabled."
Basic WIN32 build instructions (on Fedora 13; requires mingw32):
./autogen.sh # only needed if building from git repo
rm -f mingw32-config.cache
MINGW32_CFLAGS="-O2 -Wall -msse2" mingw32-configure
make
./mknsis.sh
Native WIN32 build instructions (on mingw32, on windows):
Install the Microsoft platform SDK
Install AMD APP sdk, latest version (only if you want GPU mining)
(Do NOT install the ati amd sdk if you are on nvidia)
Install mingw32
Install libcurl, copy libcurl.m4 into /mingw/share/aclocal
Install pkg-config, copy pkg.m4 into /mingw/share/aclocal
Run:
autoreconf -fvi
CFLAGS="-O2 -msse2" ./configure
make
Usage instructions: Run "cgminer --help" to see options.
---
EXECUTIVE SUMMARY ON USAGE:
Single pool, regular desktop:
cgminer -o http://pool:port -u username -p password
Single pool, dedicated miner:
cgminer -o http://pool:port -u username -p password -I 8
Multiple pool, dedicated miner:
cgminer -o http://pool1:port -u pool1username -p pool1password -o http://pool2:port -u pool2usernmae -p pool2password -I 8
---
WHILE RUNNING:
The following options are available while running with a single keypress:
[P]ool management [S]ettings [D]isplay options [Q]uit
P gives you:
Current pool management strategy: Failover
[A]dd pool [R]emove pool [D]isable pool [E]nable pool
[C]hange management strategy [S]witch pool [I]nformation
S gives you:
[D]ynamic mode: On
[L]ongpoll: On
[I]ntensity: Dynamic
[Q]ueue: 0
[S]cantime: 60
[R]etries: -1
[P]ause: 5
D gives you:
Toggle: [D]ebug [N]ormal [S]ilent [V]erbose [R]PC debug
[L]og interval [C]lear
and Q quits the application.
---
Also many issues and FAQs are covered in the forum thread
dedicated to this program,
http://forum.bitcoin.org/index.php?topic=28402.0
The output line shows the following:
[(5s):204.4 (avg):203.1 Mh/s] [Q:56 A:51 R:4 HW:0 E:91% U:2.47/m]
Each column is as follows:
A 5 second exponentially decaying average hash rate
An all time average hash rate
The number of requested work items
The number of accepted shares
The number of rejected shares
The number of hardware erorrs
The efficiency defined as the accepted shares / requested work
The utility defines as the number of shares / minute
The cgminer status line shows:
TQ: 1 ST: 1 SS: 0 DW: 0 NB: 1 LW: 8 LO: 1 RF: 1 I: 2
TQ is Total Queued work items.
ST is STaged work items (ready to use).
SS is Stale Shares discarded (detected and not submitted so don't count as rejects)
DW is Discarded Work items (work from block no longer valid to work on)
NB is New Blocks detected on the network
LW is Locally generated Work items (during slow server providing work)
LO is Local generation Occasions (server slow to provide work)
RF is Remote Fail occasions (server slow to accept work)
I is current Intensity (changes in dynamic mode).
NOTE: Running intensities above 9 with current hardware is likely to only
diminish return performance even if the hash rate might appear better. A good
starting baseline intensity to try on dedicated miners is 8. Higher values are
there to cope with future improvements in hardware.
FAILOVER STRATEGIES WITH MULTIPOOL:
A number of different strategies for dealing with multipool setups are
available. Each has their advantages and disadvantages so multiple strategies
are available by user choice, as per the following list:
FAILOVER:
The default strategy is failover. This means that if you input a number of
pools, it will try to use them as a priority list, moving away from the 1st
to the 2nd, 2nd to 3rd and so on. If any of the earlier pools recover, it will
move back to the higher priority ones.
ROUND ROBIN:
This strategy only moves from one pool to the next when the current one falls
idle and makes no attempt to move otherwise.
ROTATE:
This strategy moves at user-defined intervals from one active pool to the next,
skipping pools that are idle.
LOAD BALANCE:
This strategy sends work in equal amounts to all the pools specified. If any
pool falls idle, the rest will take up the slack keeping the miner busy.
---
LOGGING
cgminer will log to stderr if it detects stderr is being redirected to a file.
To enable logging simply add 2>logfile.txt to your command line and logfile.txt
will contain the logged output at the log level you specify (normal, verbose,
debug etc.)
In other words if you would normally use:
./cgminer -o xxx -u yyy -p zzz
if you use
./cgminer -o xxx -u yyy -p zzz 2>logfile.txt
it will log to a file called logfile.txt and otherwise work the same.
There is also the -m option on linux which will spawn a command of your choice
and pipe the output directly to that command.
---
FAQ
Q: cgminer segfaults when I change my shell window size.
A: Older versions of libncurses have a bug to do with refreshing a window
after a size change. Upgrading to a new version of curses will fix it.
Q: Can I mine on servers from different networks (eg smartcoin and bitcoin) at
the same time?
A: No, cgminer keeps a database of the block it's working on to ensure it does
not work on stale blocks, and having different blocks from two networks would
make it invalidate the work from each other.
Q: Can I change the settings individually for each GPU?
A: Not currently.
Q: Can I put multiple pools in the json config file?
A: Not currently, but you can use multiple config files and specify each with
successive -c. e.g.: cgminer -c cfg1.json -c cfg2.json
Q: The build fails with gcc is unable to build a binary.
A: Remove the "-march=native" component of your CFLAGS as your version of gcc
does not support it.
Q: The CPU usage is high.
A: If you're on linux, the ATI drivers after 11.6 have a bug that makes them
consume 100% of one CPU core unnecessarily so downgrade to 11.6. If you're on
windows, you may be out of luck because the pthread library used consumes a
lot of CPU.
Q: Can you implement feature X?
A: I can, but time is limited, and people who donate are more likely to get
their feature requests implemented.
Q: My GPU hangs and I have to reboot it to get it going again?
A: The more aggressively the mining software uses your GPU, the less overclock
you will be able to run. You are more likely to hit your limits with cgminer
and you will find you may need to overclock your GPU less aggressively. The
software cannot be responsible and make your GPU hang directly.
---
This code is provided entirely free of charge by the programmer in his spare
time so donations would be greatly appreciated.
Con Kolivas <kernel@kolivas.org>
15qSxP1SQcUX3o4nhkfdbgyoWEFMomJ4rZ
