bfgminer/README

This is a multi-threaded multi-pool CPU and GPU miner with ATI GPU monitoring,
(over)clocking and fanspeed support for bitcoin and derivative coins.

GIT TREE:

https://github.com/ckolivas/cgminer

Support thread:

http://bitcointalk.org/index.php?topic=28402.0

IRC Channel:

irc://irc.freenode.net/cgminer

License: GPLv2.  See COPYING for details.

Dependencies:
	curl dev library 	http://curl.haxx.se/libcurl/
	(libcurl4-openssl-dev)
	curses dev library
	(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)
	yasm 1.0.1+ http://yasm.tortall.net/
	(yasm is optional, gives assembly routines for CPU mining)
	AMD APP SDK		http://developer.amd.com/sdks/AMDAPPSDK
	(This sdk is optional and gives support for GPU mining)
	AMD ADL SDK		http://developer.amd.com/sdks/ADLSDK
	(This sdk is optional and gives support for ATI GPU monitoring & clocking)

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.)
	To build with GPU monitoring & clocking support:
	Extract the AMD ADL SDK, latest version - there is also no official
	place for these files. Copy all the *.h files in the "include"
	directory into cgminer's ADL_SDK directory.

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 (LIKELY OUTDATED INFO. 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)
	Install AMD ADL sdk, latest version (only if you want GPU monitoring)
	(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:

Usage: . [-atDdGCgIKklmpPQqrRsTouvwOchnV] 
Options for both config file and command line:
--algo|-a <arg>     Specify sha256 implementation for CPU mining:
        auto            Benchmark at startup and pick fastest algorithm
        c               Linux kernel sha256, implemented in C
        4way            tcatm's 4-way SSE2 implementation
        via             VIA padlock implementation
        cryptopp        Crypto++ C/C++ implementation
        sse2_64         SSE2 64 bit implementation for x86_64 machines
        sse4_64         SSE4.1 64 bit implementation for x86_64 machines (default: sse2_64)
--auto-fan          Automatically adjust all GPU fan speeds to maintain a target temperature
--auto-gpu          Automatically adjust all GPU engine clock speeds to maintain a target temperature
--cpu-threads|-t <arg> Number of miner CPU threads (default: 4)
--debug|-D          Enable debug output
--device|-d <arg>   Select device to use, (Use repeat -d for multiple devices, default: all)
--disable-gpu|-G    Disable GPU mining even if suitable devices exist
--enable-cpu|-C     Enable CPU mining with GPU mining (default: no CPU mining if suitable GPUs exist)
--failover-only     Don't leak work to backup pools when primary pool is lagging
--gpu-threads|-g <arg> Number of threads per GPU (1 - 10) (default: 2)
--gpu-engine <arg>  Set the GPU engine (over)clock in Mhz - one value for all or separate by commas for per card.
--gpu-fan <arg>     Set the GPU fan percentage - one value for all or separate by commas for per card.
--gpu-memclock <arg> Set the GPU memory (over)clock in Mhz - one value for all or separate by commas for per card.
--gpu-powertune <arg> Set the GPU powertune percentage - one value for all or separate by commas for per card.
--gpu-vddc <arg>    Set the GPU voltage in Volts - one value for all or separate by commas for per card.
--intensity|-I <arg> Intensity of GPU scanning (-10 -> 10, default: dynamic to maintain desktop interactivity)
--kernel-path|-K <arg> Specify a path to where the kernel .cl files are (default: "/usr/local/bin")
--kernel|-k <arg>   Select kernel to use (poclbm or phatk - default: auto)
--load-balance      Change multipool strategy from failover to even load balance
--log|-l <arg>      Interval in seconds between log output (default: 5)
--monitor|-m <arg>  Use custom pipe cmd for output messages
--no-longpoll       Disable X-Long-Polling support
--no-restart        Do not attempt to restart GPUs that hang
--pass|-p <arg>     Password for bitcoin JSON-RPC server
--per-device-stats  Force verbose mode and output per-device statistics
--protocol-dump|-P  Verbose dump of protocol-level activities
--queue|-Q <arg>    Minimum number of work items to have queued (0 - 10) (default: 1)
--quiet|-q          Disable logging output, display status and errors
--real-quiet        Disable all output
--retries|-r <arg>  Number of times to retry before giving up, if JSON-RPC call fails (-1 means never) (default: -1)
--retry-pause|-R <arg> Number of seconds to pause, between retries (default: 5)
--rotate <arg>      Change multipool strategy from failover to regularly rotate at N minutes (default: 0)
--round-robin       Change multipool strategy from failover to round robin on failure
--scan-time|-s <arg> Upper bound on time spent scanning current work, in seconds (default: 60)
--sched-start <arg> Set a time of day in HH:MM to start mining (a once off without a stop time)
--sched-stop <arg>  Set a time of day in HH:MM to stop mining (will quit without a start time)
--shares <arg>      Quit after mining N shares (default: unlimited)
--submit-stale      Submit shares even if they would normally be considered stale
--syslog            Use system log for output messages (default: standard error)
--temp-hysteresis <arg> Set how much the temperature can fluctuate outside limits when automanaging speeds (default: 3)
--temp-overheat <arg> Set the overheat temperature when automatically managing fan and GPU speeds (default: 85)
--temp-target <arg> Set the target temperature when automatically managing fan and GPU speeds (default: 75)
--text-only|-T      Disable ncurses formatted screen output
--url|-o <arg>      URL for bitcoin JSON-RPC server
--user|-u <arg>     Username for bitcoin JSON-RPC server
--vectors|-v <arg>  Override detected optimal vector width (1, 2 or 4)
--verbose           Log verbose output to stderr as well as status output
--worksize|-w <arg> Override detected optimal worksize (default: 0)
--userpass|-O <arg> Username:Password pair for bitcoin JSON-RPC server
Options for command line only:
--config|-c <arg>   Load a JSON-format configuration file
See example-cfg.json for an example configuration.
--help|-h           Print this message
--ndevs|-n          Enumerate number of detected GPUs and exit
--version|-V        Display version and exit

---

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 9

Multiple pool, dedicated miner:

cgminer -o http://pool1:port -u pool1username -p pool1password -o http://pool2:port -u pool2usernmae -p pool2password -I 9

Add overclocking settings, GPU and fan control for all cards:

cgminer -o http://pool:port -u username -p password -I 9 --auto-fan --auto-gpu --gpu-engine 950 --gpu-memclock 300

Add overclocking settings, GPU and fan control with different engine settings for 4 cards:

cgminer -o http://pool:port -u username -p password -I 9 --auto-fan --auto-gpu --gpu-engine 950,945,930,960 --gpu-memclock 300

READ WARNINGS AND DOCUMENTATION BELOW ABOUT OVERCLOCKING

---

WHILE RUNNING:

The following options are available while running with a single keypress:

[P]ool management [G]PU 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


Q quits the application.


G gives you something like:

GPU 0: [124.2 / 191.3 Mh/s] [Q:212  A:77  R:33  HW:0  E:36%  U:1.73/m]
Temp: 67.0 C
Fan Speed: 35% (2500 RPM)
Engine Clock: 960 MHz
Memory Clock: 480 Mhz
Vddc: 1.200 V
Activity: 93%
Powertune: 0%
Last initialised: [2011-09-06 12:03:56]
Thread 0: 62.4 Mh/s Enabled ALIVE
Thread 1: 60.2 Mh/s Enabled ALIVE

[E]nable [D]isable [R]estart GPU [C]hange settings
Or press any other key to continue


---
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 and can be >100
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  GF: 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
GF is Getwork Fail 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 9. Higher values are
there to cope with future improvements in hardware.

---
MULTIPOOL

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.

---
OVERCLOCKING WARNING AND INFORMATION

AS WITH ALL OVERCLOCKING TOOLS YOU ARE ENTIRELY RESPONSIBLE FOR ANY HARM YOU
MAY CAUSE TO YOUR HARDWARE. OVERCLOCKING CAN INVALIDATE WARRANTIES, DAMAGE
HARDWARE AND EVEN CAUSE FIRES. THE AUTHOR ASSUMES NO RESPONSIBILITY FOR ANY
DAMAGE YOU MAY CAUSE OR UNPLANNED CHILDREN THAT MAY OCCUR AS A RESULT.

The GPU monitoring, clocking and fanspeed control incorporated into cgminer
comes through use of the ATI Display Library. As such, it only supports ATI
GPUs. Even if ADL support is successfully built into cgminer, unless the card
and driver supports it, no GPU monitoring/settings will be available.

Cgminer supports initial setting of GPU engine clock speed, memory clock
speed, voltage, fanspeed, and the undocumented powertune feature of 69x0+ GPUs.
The setting passed to cgminer is used by all GPUs unless separate values are
specified. All settings can all be changed within the menu on the fly on a
per-GPU basis.

For example:
--gpu-engine 950 --gpu-memclock 825

will try to set all GPU engine clocks to 950 and all memory clocks to 825,
while:
--gpu-engine 950,945,930,960 --gpu-memclock 300

will try to set the engine clock of card 0 to 950, 1 to 945, 2 to 930, 3 to
960 and all memory clocks to 825.

AUTO MODES:
There are two "auto" modes in cgminer, --auto-fan and --auto-gpu. These can
be used independently of each other and are complementary. Both auto modes
are designed to safely change settings while trying to maintain a target
temperature. By default this is set to 75 degrees C but can be changed with:
--temp-target

AUTO FAN:
Fan control in auto fan works off the theory that the minimum possible fan
required to maintain an optimal temperature will use less power, make less
noise, and prolong the life of the fan. In auto-fan mode, the fan speed is
limited to 85% if the temperature is below "overheat" intentionally, as
higher fanspeeds on GPUs do not produce signficantly more cooling, yet
significanly shorten the lifespan of the fans. If temperature reaches the
overheat value, fanspeed will still be increased to 100%. The overheat value
is set to 85 degrees by default and can be changed with:
--temp-overheat

AUTO GPU:
GPU control in auto gpu tries to maintain as high a clock speed as possible
while not reaching overheat temperatures. As a lower clock speed limit,
the auto-gpu mode checks the GPU card's "normal" clock speed and will not go
below this unless you have manually set a lower speed at some time. Also,
unless a higher clock speed was specified at startup, it will not raise the
clockspeed. If the temperature climbs, fanspeed is adjusted and optimised
before GPU engine clockspeed is adjusted. If fan speed control is not available
or already optimal, then GPU clock speed is only decreased if it goes over
the target temperature by the hysteresis amount, which is set to 3 by default
and can be changed with:
--temp-hysteresis
If the temperature drops below the target temperature, and engine clock speed
is not at the highest level set at startup, cgminer will raise the clock speed.
If at any time you manually set an even higher clock speed successfully in
cgminer, it will record this value and use it as its new upper limit (and the
same for low clock speeds and lower limits).

CHANGING SETTINGS:
When setting values, it is important to realise that even though the driver
may report the value was changed successfully, and the new card power profile
information contains the values you set it to, that the card itself may
refuse to use those settings. As the performance profile changes dynamically,
querying the "current" value on the card can be wrong as well. So when changing
values in cgminer, after a pause of 1 second, it will report to you the current
values where you should check that your change has taken. An example is that
6970 reference cards will accept low memory values but refuse to actually run
those lower memory values unless they're within 125 of the engine clock speed.
In that scenario, they usually set their real speed back to their default.

STARTUP / SHUTDOWN:
When cgminer starts up, it tries to read off the current profile information
for clock and fan speeds and stores these values. When quitting cgminer, it
will then try to restore the original values. Changing settings outside of
cgminer while it's running may be reset to the startup cgminer values when
cgminer shuts down because of this.

---

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 intensity 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.

Q: The Queue total at the top is much more than the sum of all the Queued
values in each device.
A: The per-device queue value is only incremented when that device has
requested work over any buffered amount of work, so with fewer devices this
value may stay very small.

Q: Work keeps going to my backup pool even though my primary pool hasn't
failed?
A: Cgminer checks for conditions where the primary pool is lagging and will
pass some work to the backup servers under those conditions. The reason for
doing this is to try its absolute best to keep the GPUs working on something
useful and not risk idle periods. You can disable this behaviour with the
option --failover-only.

Q: GUI version?
A: No.

---

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