forked from vthoang/cgminer
-
Notifications
You must be signed in to change notification settings - Fork 0
/
README
1129 lines (897 loc) · 51.2 KB
/
README
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
This is a multi-threaded multi-pool FPGA and ASIC miner for bitcoin.
This code is provided entirely free of charge by the programmer in his spare
time so donations would be greatly appreciated. Please consider donating to the
address below.
Con Kolivas <[email protected]>
15qSxP1SQcUX3o4nhkfdbgyoWEFMomJ4rZ
NOTE: This code is licensed under the GPLv3. This means that the source to any
modifications you make to this code MUST be provided by law if you distribute
modified binaries. See COPYING for details.
DOWNLOADS:
http://ck.kolivas.org/apps/cgminer
GIT TREE:
https://github.com/ckolivas/cgminer
Support thread:
http://bitcointalk.org/index.php?topic=28402.0
IRC Channel:
irc://irc.freenode.net/cgminer
SEE ALSO API-README, ASIC-README and FGPA-README FOR MORE INFORMATION ON EACH.
---
EXECUTIVE SUMMARY ON USAGE:
Single pool:
cgminer -o http://pool:port -u username -p password
Multiple pools:
cgminer -o http://pool1:port -u pool1username -p pool1password -o http://pool2:port -u pool2usernmae -p pool2password
Single pool with a standard http proxy:
cgminer -o "http:proxy:port|http://pool:port" -u username -p password
Single pool with a socks5 proxy:
cgminer -o "socks5:proxy:port|http://pool:port" -u username -p password
Single pool with stratum protocol support:
cgminer -o stratum+tcp://pool:port -u username -p password
Solo mining to local bitcoind:
cgminer -o http://localhost:8332 -u username -p password --btc-address 15qSxP1SQcUX3o4nhkfdbgyoWEFMomJ4rZ
The list of proxy types are:
http: standard http 1.1 proxy
http0: http 1.0 proxy
socks4: socks4 proxy
socks5: socks5 proxy
socks4a: socks4a proxy
socks5h: socks5 proxy using a hostname
If you compile cgminer with a version of CURL before 7.19.4 then some of the above will
not be available. All are available since CURL version 7.19.4
If you specify the --socks-proxy option to cgminer, it will only be applied to all pools
that don't specify their own proxy setting like above
After saving configuration from the menu, you do not need to give cgminer any
arguments and it will load your configuration.
Any configuration file may also contain a single
"include" : "filename"
to recursively include another configuration file.
Writing the configuration will save all settings from all files in the output.
---
BUILDING CGMINER FOR YOURSELF
DEPENDENCIES:
Mandatory:
pkg-config http://www.freedesktop.org/wiki/Software/pkg-config
libtool http://www.gnu.org/software/libtool/
Optional:
curl dev library http://curl.haxx.se/libcurl/
(libcurl4-openssl-dev - Must tell configure --disable-libcurl otherwise
it will attempt to compile it in)
curses dev library
(libncurses5-dev or libpdcurses on WIN32 for text user interface)
libusb-1 dev library (libusb-1.0-0-dev)
(This is only required for USB device support)
libudev dev library (libudev-dev)
(This is only required for USB device support and is linux only)
If building from git:
autoconf
automake
If building on Ubuntu:
sudo apt-get install build-essential autoconf automake libtool pkg-config \
libcurl4-openssl-dev libudev-dev libusb-1.0-0-dev \
libncurses5-dev
CGMiner specific configuration options:
--enable-ants1 Compile support for Antminer S1 Bitmain (default
disabled)
--enable-ants2 Compile support for Antminer S2 Bitmain (default
disabled)
--enable-avalon Compile support for Avalon (default disabled)
--enable-avalon2 Compile support for Avalon2/3 (default disabled)
--enable-avalon4 Compile support for Avalon4/4.1/6 (default disabled)
--enable-avalon7 Compile support for Avalon7 (default disabled)
--enable-bab Compile support for BlackArrow Bitfury (default
disabled)
--enable-bflsc Compile support for BFL ASICs (default disabled)
--enable-bitforce Compile support for BitForce FPGAs (default
disabled)
--enable-bitfury Compile support for BitFury ASICs (default disabled)
--enable-bitmine_A1 Compile support for Bitmine.ch A1 ASICs (default
disabled)
--enable-blockerupter Compile support for ASICMINER BlockErupter Tube/Prisma
(default disabled)
--enable-cointerra Compile support for Cointerra ASICs (default disabled)
--enable-drillbit Compile support for Drillbit BitFury ASICs (default
disabled)
--enable-gekko Compile support for GekkoScience (default disabled)
--enable-hashfast Compile support for Hashfast (default disabled)
--enable-icarus Compile support for Icarus (default disabled)
--enable-klondike Compile support for Klondike (default disabled)
--enable-knc Compile support for KnC miners (default disabled)
--enable-minion Compile support for Minion BlackArrow ASIC (default
disabled)
--enable-modminer Compile support for ModMiner FPGAs(default disabled)
--enable-sp10 Compile support for Spondoolies SP10 (default
disabled)
--enable-sp30 Compile support for Spondoolies SP30 (default
disabled)
--disable-libcurl Disable building with libcurl for GBT support
--enable-libsystemd Compile support for system watchdog and status
notifications (default disabled)
--without-curses Compile support for curses TUI (default enabled)
--with-system-jansson Compile against dynamic system jansson (default use
included static jansson)
Basic *nix build instructions:
To actually build:
./autogen.sh # only needed if building from git repo
CFLAGS="-O2 -Wall -march=native" ./configure <options>
make
No installation is necessary. You may run cgminer from the build
directory directly, but you may do make install if you wish to install
cgminer to a system location or location you specified.
Building for windows:
It is actually easiest to build a windows binary using cross compilation tools
provided by "mxe" available at http://mxe.cc/ (use the 32 bit one!)
Once you have followed the instructions for building mxe:
export PATH=(path/to/mxe)/usr/bin/:$PATH
CFLAGS="-O2 -Wall -W -march=i686" ./configure --host=i686-pc-mingw32 <options>
make
Native WIN32 build instructions: see windows-build.txt but these instructions
are now hopelessly out of date.
---
Usage instructions: Run "cgminer --help" to see options:
Usage: cgminer [-DdElmpPQqUsTouOchnV]
Options for both config file and command line:
--anu-freq <arg> Set AntminerU1/2 frequency in MHz, range 125-500 (default: 250.0)
--api-allow <arg> Allow API access only to the given list of [G:]IP[/Prefix] addresses[/subnets]
--api-description <arg> Description placed in the API status header, default: cgminer version
--api-groups <arg> API one letter groups G:cmd:cmd[,P:cmd:*...] defining the cmds a groups can use
--api-listen Enable API, default: disabled
--api-mcast Enable API Multicast listener, default: disabled
--api-mcast-addr <arg> API Multicast listen address
--api-mcast-code <arg> Code expected in the API Multicast message, don't use '-'
--api-mcast-des <arg> Description appended to the API Multicast reply, default: ''
--api-mcast-port <arg> API Multicast listen port (default: 4028)
--api-network Allow API (if enabled) to listen on/for any address, default: only 127.0.0.1
--api-port <arg> Port number of miner API (default: 4028)
--au3-freq <arg> Set AntminerU3 frequency in MHz, range 100-250 (default: 225.0)
--au3-volt <arg> Set AntminerU3 voltage in mv, range 725-850, 0 to not set (default: 775)
--avalon-auto Adjust avalon overclock frequency dynamically for best hashrate
--avalon-cutoff <arg> Set avalon overheat cut off temperature (default: 60)
--avalon-fan <arg> Set fanspeed percentage for avalon, single value or range (default: 20-100)
--avalon-freq <arg> Set frequency range for avalon-auto, single value or range
--avalon-options <arg> Set avalon options baud:miners:asic:timeout:freq:tech
--avalon-temp <arg> Set avalon target temperature (default: 50)
--avalon2-freq Set frequency range for Avalon2, single value or range
--avalon2-voltage Set Avalon2 core voltage, in millivolts
--avalon2-fan Set Avalon2 target fan speed
--avalon2-cutoff <arg> Set Avalon2 overheat cut off temperature (default: 88)
--avalon2-fixed-speed Set Avalon2 fan to fixed speed
--avalon4-automatic-voltage Automatic adjust voltage base on module DH
--avalon4-voltage Set Avalon4 core voltage, in millivolts, step: 125
--avalon4-freq Set frequency for Avalon4, 1 to 3 values, example: 445:385:370
--avalon4-fan Set Avalon4 target fan speed range
--avalon4-temp <arg> Set Avalon4 target temperature (default: 42)
--avalon4-cutoff <arg> Set Avalon4 overheat cut off temperature (default: 65)
--avalon4-polling-delay <arg> Set Avalon4 polling delay value (ms) (default: 20)
--avalon4-ntime-offset <arg> Set Avalon4 MM ntime rolling max offset (default: 4)
--avalon4-aucspeed <arg> Set Avalon4 AUC IIC bus speed (default: 400000)
--avalon4-aucxdelay <arg> Set Avalon4 AUC IIC xfer read delay, 4800 ~= 1ms (default: 9600)
--avalon4-miningmode <arg> Set Avalon4 mining mode(0:custom, 1:eco, 2:normal, 3:turbo (default: 0)
--avalon4-freezesafe Make Avalon4 running as a radiator when stratum server failed
--avalon4-ntcb <arg> Set Avalon4 MM NTC B value (default: 3450)
--avalon4-freq-min <arg> Set minimum frequency for Avalon4 (default: 100)
--avalon4-freq-max <arg> Set maximum frequency for Avalon4 (default: 1000)
--avalon4-noncecheck-off Disable A3218 inside nonce check function
--avalon4-smart-speed <arg> Set smart speed, range 0-3. 0 means Disable (default: 2)
--avalon4-speed-bingo <arg> Set A3218 speed bingo for smart speed mode 1 (default: 255)
--avalon4-speed-error <arg> Set A3218 speed error for smart speed mode 1 (default: 3)
--avalon4-least-pll <arg> Set least pll check threshold for smart speed mode 2 (default: 768)
--avalon4-most-pll <arg> Set most pll check threshold for smart speed mode 2 (default: 256)
--avalon7-voltage Set Avalon7 default core voltage, in millivolts, step: 78
--avalon7-voltage-level Set Avalon7 default level of core voltage, range:[0, 15], step: 1
--avalon7-voltage-offset Set Avalon7 default offset of core voltage, range:[-2, 1], step: 1
--avalon7-freq Set Avalon7 default frequency, range:[24, 1404], step: 12, example: 500
--avalon7-freq-sel <arg> Set Avalon7 default frequency select, range:[0, 5], step: 1, example: 3 (default: 0)
--avalon7-fan Set Avalon7 target fan speed, range:[0, 100], step: 1, example: 0-100
--avalon7-temp <arg> Set Avalon7 target temperature, range:[0, 100] (default: 99)
--avalon7-polling-delay <arg> Set Avalon7 polling delay value (ms) (default: 20)
--avalon7-aucspeed <arg> Set AUC3 IIC bus speed (default: 400000)
--avalon7-aucxdelay <arg> Set AUC3 IIC xfer read delay, 4800 ~= 1ms (default: 19200)
--avalon7-smart-speed <arg> Set Avalon7 smart speed, range 0-1. 0 means Disable (default: 1)
--avalon7-th-pass <arg> Set A3212 th pass value (default: 162)
--avalon7-th-fail <arg> Set A3212 th fail value (default: 10921)
--avalon7-th-init <arg> Set A3212 th init value (default: 32767)
--avalon7-th-ms <arg> Set A3212 th ms value (default: 1)
--avalon7-th-timeout <arg> Set A3212 th timeout value (default: 0)
--avalon7-iic-detect Enable Avalon7 detect through iic controller
--avalon7-freqadj-time <arg> Set Avalon7 check interval when run in AVA7_FREQ_TEMPADJ_MODE (default: 60)
--avalon7-delta-temp <arg> Set Avalon7 delta temperature when reset freq in AVA7_FREQ_TEMPADJ_MODE (default: 0)
--avalon7-delta-freq <arg> Set Avalon7 delta freq when adjust freq in AVA7_FREQ_TEMPADJ_MODE (default: 100)
--avalon7-freqadj-temp <arg> Set Avalon7 check temperature when run into AVA7_FREQ_TEMPADJ_MODE (default: 104)
--avalon7-nonce-mask <arg> Set A3212 nonce mask, range 24-32. (default: 31)
--no-avalon7-asic-debug Disable A3212 debug.
--bab-options <arg> Set BaB options max:def:min:up:down:hz:delay:trf
--balance Change multipool strategy from failover to even share balance
--benchfile <arg> Run cgminer in benchmark mode using a work file - produces no shares
--benchfile-display Display each benchfile nonce found
--benchmark Run cgminer in benchmark mode - produces no shares
--bet-clk <arg> Set clockspeed of ASICMINER Tube/Prisma to (arg+1)*10MHz (default: 23)
--bfl-range Use nonce range on bitforce devices if supported
--bflsc-overheat <arg> Set overheat temperature where BFLSC devices throttle, 0 to disable (default: 85)
--bitburner-fury-voltage <arg> Set BitBurner Fury core voltage, in millivolts
--bitburner-fury-options <arg> Override avalon-options for BitBurner Fury boards baud:miners:asic:timeout:freq
--bitburner-voltage <arg> Set BitBurner (Avalon) core voltage, in millivolts
--bitmain-auto Adjust bitmain overclock frequency dynamically for best hashrate
--bitmain-cutoff <arg> Set bitmain overheat cut off temperature
--bitmain-fan <arg> Set fanspeed percentage for bitmain, single value or range (default: 20-100)
--bitmain-freq <arg> Set bitmain freq options timeout:freq:regdata
--bitmain-hwerror Set bitmain device detect hardware error
--bitmain-options <arg> Set bitmain options baud:miners:asic:timeout:freq:regdata
--bitmain-temp <arg> Set bitmain target temperature
--bitmain-workdelay <arg> Set bitmain work delay (ms) 0-100
--bitmain-voltage <arg> Set bitmain voltage - S2/S3 only
--bitmain-dev <arg> Set bitmain device - S2 only
--bitmainbeeper Set bitmain beeper ringing
--bitmaintempoverctrl Set bitmain stop runing when temprerature is over 80 degree Celsius
--bxf-bits <arg> Set max BXF/HXF bits for overclocking (default: 54)
--bxf-temp-target <arg> Set target temperature for BXF/HXF devices (default: 82)
--bxm-bits <arg> Set BXM bits for overclocking (default: 54)
--btc-address <arg> Set bitcoin target address when solo mining to bitcoind
--btc-sig <arg> Set signature to add to coinbase when solo mining (optional)
--compac-freq <arg> Set GekkoScience Compac frequency in MHz, range 100-500 (default: 150.0)
--compact Use compact display without per device statistics
--debug|-D Enable debug output
--disable-rejecting Automatically disable pools that continually reject shares
--drillbit-options <arg> Set drillbit options <int|ext>:clock[:clock_divider][:voltage]
--expiry|-E <arg> Upper bound on how many seconds after getting work we consider a share from it stale (default: 120)
--failover-only Don't leak work to backup pools when primary pool is lagging
--fix-protocol Do not redirect to stratum protocol from GBT
--gekko-2pac-freq <arg> Set GekkoScience 2Pac BM1384 frequency in MHz, range 6.25-500 (default 100.0)
--gekko-compac-freq <arg> Set GekkoScience Compac BM1384 frequency in MHz, range 6.25-500 (default 150.0)
--gekko-terminus-freq <arg> Set GekkoScience Terminus BM1384 frequency in MHz, range 6.25-500 (default 150.0)
--hfa-hash-clock <arg> Set hashfast clock speed (default: 550)
--hfa-fail-drop <arg> Set how many MHz to drop clockspeed each failure on an overlocked hashfast device (default: 10)
--hfa-fan <arg> Set fanspeed percentage for hashfast, single value or range (default: 10-85)
--hfa-name <arg> Set a unique name for a single hashfast device specified with --usb or the first device found
--hfa-noshed Disable hashfast dynamic core disabling feature
--hfa-options <arg> Set hashfast options name:clock (comma separated)
--hfa-temp-overheat <arg> Set the hashfast overheat throttling temperature (default: 95)
--hfa-temp-target <arg> Set the hashfast target temperature (0 to disable) (default: 88)
--hro-freq Set the hashratio clock frequency (default: 280)
--hotplug <arg> Seconds between hotplug checks (0 means never check)
--klondike-options <arg> Set klondike options clock:temptarget
--load-balance Change multipool strategy from failover to quota based balance
--log|-l <arg> Interval in seconds between log output (default: 5)
--lowmem Minimise caching of shares for low memory applications
--minion-chipreport <arg> Seconds to report chip 5min hashrate, range 0-100 (default: 0=disabled)
--minion-freq <arg> Set minion chip frequencies in MHz, single value or comma list, range 100-1400 (default: 1200)
--minion-freqchange Millisecond total time to do frequency changes (default: 1000)
--minion-freqpercent Percentage to use when starting up a chip (default: 70%)
--minion-idlecount Report when IdleCount is >0 or changes
--minion-ledcount Turn off led when more than this many chips below the ledlimit (default: 0)
--minion-ledlimit Turn off led when chips GHs are below this (default: 90)
--minion-noautofreq Disable automatic frequency adjustment
--minion-overheat Enable directly halting any chip when the status exceeds 100C
--minion-spidelay Add a delay in microseconds after each SPI I/O
--minion-spireset SPI regular reset: iNNN for I/O count or sNNN for seconds - 0 means none
--minion-spisleep Sleep time in milliseconds when doing an SPI reset
--minion-temp <arg> Set minion chip temperature threshold, single value or comma list, range 120-160 (default: 135C)
--monitor|-m <arg> Use custom pipe cmd for output messages
--nfu-bits <arg> Set nanofury bits for overclocking, range 32-63 (default: 50)
--net-delay Impose small delays in networking to not overload slow routers
--no-submit-stale Don't submit shares if they are detected as stale
--osm-led-mode <arg> Set LED mode for OneStringMiner devices (default: 4)
--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+) (default: 1)
--quiet|-q Disable logging output, display status and errors
--quota|-U <arg> quota;URL combination for server with load-balance strategy quotas
--real-quiet Disable all output
--rock-freq <arg> Set RockMiner frequency in MHz, range 200-400 (default: 270)
--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: -1)
--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)
--sharelog <arg> Append share log to file
--shares <arg> Quit after mining N shares (default: unlimited)
--socks-proxy <arg> Set socks4 proxy (host:port)
--suggest-diff <arg> Suggest miner difficulty for pool to user (default: none)
--syslog Use system log for output messages (default: standard error)
--temp-cutoff <arg> Temperature where a device will be automatically disabled, one value or comma separated list (default: 95)
--text-only|-T Disable ncurses formatted screen output
--url|-o <arg> URL for bitcoin JSON-RPC server
--usb <arg> USB device selection
--user|-u <arg> Username for bitcoin JSON-RPC server
--userpass|-O <arg> Username:Password pair for bitcoin JSON-RPC server
--verbose Log verbose output to stderr as well as status output
--widescreen Use extra wide display without toggling
--worktime Display extra work time debug information
Options for command line only:
--config|-c <arg> Load a JSON-format configuration file
See example.conf for an example configuration.
--default-config <arg> Specify the filename of the default config file
Loaded at start and used when saving without a name.
--help|-h Print this message
--ndevs|-n Display all USB devices and exit
--version|-V Display version and exit
Silent USB device (ASIC and FPGA) options:
--icarus-options <arg> Set specific FPGA board configurations - one set of values for all or comma separated
--icarus-timing <arg> Set how the Icarus timing is calculated - one setting/value for all or comma separated
--usb-dump (See FPGA-README)
See FGPA-README or ASIC-README for more information regarding these.
ASIC only options:
--anu-freq <arg> Set AntminerU1/2 frequency in MHz, range 125-500 (default: 250.0)
--au3-freq <arg> Set AntminerU3 frequency in MHz, range 100-250 (default: 225.0)
--au3-volt <arg> Set AntminerU3 voltage in mv, range 725-850, 0 to not set (default: 750)
--avalon-auto Adjust avalon overclock frequency dynamically for best hashrate
--avalon-cutoff <arg> Set avalon overheat cut off temperature (default: 60)
--avalon-fan <arg> Set fanspeed percentage for avalon, single value or range (default: 20-100)
--avalon-freq <arg> Set frequency range for avalon-auto, single value or range
--avalon-options <arg> Set avalon options baud:miners:asic:timeout:freq:tech
--avalon-temp <arg> Set avalon target temperature (default: 50)
--avalon2-freq Set frequency range for Avalon2, single value or range
--avalon2-voltage Set Avalon2 core voltage, in millivolts
--avalon2-fan Set Avalon2 target fan speed
--avalon2-cutoff <arg> Set Avalon2 overheat cut off temperature (default: 88)
--avalon2-fixed-speed Set Avalon2 fan to fixed speed
--avalon4-automatic-voltage Automatic adjust voltage base on module DH
--avalon4-voltage Set Avalon4 core voltage, in millivolts, step: 125
--avalon4-freq Set frequency for Avalon4, 1 to 3 values, example: 445:385:370
--avalon4-fan Set Avalon4 target fan speed range
--avalon4-temp <arg> Set Avalon4 target temperature (default: 42)
--avalon4-cutoff <arg> Set Avalon4 overheat cut off temperature (default: 65)
--avalon4-polling-delay <arg> Set Avalon4 polling delay value (ms) (default: 20)
--avalon4-ntime-offset <arg> Set Avalon4 MM ntime rolling max offset (default: 4)
--avalon4-aucspeed <arg> Set Avalon4 AUC IIC bus speed (default: 400000)
--avalon4-aucxdelay <arg> Set Avalon4 AUC IIC xfer read delay, 4800 ~= 1ms (default: 9600)
--avalon7-voltage Set Avalon7 default core voltage, in millivolts, step: 78
--avalon7-voltage-level Set Avalon7 default level of core voltage, range:[0, 15], step: 1
--avalon7-voltage-offset Set Avalon7 default offset of core voltage, range:[-2, 1], step: 1
--avalon7-freq Set Avalon7 default frequency, range:[24, 1404], step: 12, example: 500
--avalon7-freq-sel <arg> Set Avalon7 default frequency select, range:[0, 5], step: 1, example: 3 (default: 0)
--avalon7-fan Set Avalon7 target fan speed, range:[0, 100], step: 1, example: 0-100
--avalon7-temp <arg> Set Avalon7 target temperature, range:[0, 100] (default: 99)
--avalon7-polling-delay <arg> Set Avalon7 polling delay value (ms) (default: 20)
--avalon7-aucspeed <arg> Set AUC3 IIC bus speed (default: 400000)
--avalon7-aucxdelay <arg> Set AUC3 IIC xfer read delay, 4800 ~= 1ms (default: 19200)
--avalon7-smart-speed <arg> Set Avalon7 smart speed, range 0-1. 0 means Disable (default: 1)
--avalon7-th-pass <arg> Set A3212 th pass value (default: 162)
--avalon7-th-fail <arg> Set A3212 th fail value (default: 10921)
--avalon7-th-init <arg> Set A3212 th init value (default: 32767)
--avalon7-th-ms <arg> Set A3212 th ms value (default: 1)
--avalon7-th-timeout <arg> Set A3212 th timeout value (default: 0)
--avalon7-iic-detect Enable Avalon7 detect through iic controller
--avalon7-freqadj-time <arg> Set Avalon7 check interval when run in AVA7_FREQ_TEMPADJ_MODE (default: 60)
--avalon7-delta-temp <arg> Set Avalon7 delta temperature when reset freq in AVA7_FREQ_TEMPADJ_MODE (default: 0)
--avalon7-delta-freq <arg> Set Avalon7 delta freq when adjust freq in AVA7_FREQ_TEMPADJ_MODE (default: 100)
--avalon7-freqadj-temp <arg> Set Avalon7 check temperature when run into AVA7_FREQ_TEMPADJ_MODE (default: 104)
--avalon7-nonce-mask <arg> Set A3212 nonce mask, range 24-32. (default: 31)
--no-avalon7-asic-debug Disable A3212 debug.
--bab-options <arg> Set BaB options max:def:min:up:down:hz:delay:trf
--bflsc-overheat <arg> Set overheat temperature where BFLSC devices throttle, 0 to disable (default: 90)
--bitburner-fury-options <arg> Override avalon-options for BitBurner Fury boards baud:miners:asic:timeout:freq
--bitburner-fury-voltage <arg> Set BitBurner Fury core voltage, in millivolts
--bitburner-voltage <arg> Set BitBurner (Avalon) core voltage, in millivolts
--bitmine-a1-options <ref_clk>:<sys_clk>:<spi_clk>:<max_chip>
--bxf-temp-target <arg> Set target temperature for BXF devices (default: 82)
--bxm-bits <arg> Set BXM bits for overclocking (default: 50)
--hfa-hash-clock <arg> Set hashfast clock speed (default: 550)
--hfa-fail-drop <arg> Set how many MHz to drop clockspeed each failure on an overlocked hashfast device (default: 10)
--hfa-fan <arg> Set fanspeed percentage for hashfast, single value or range (default: 10-85)
--hfa-name <arg> Set a unique name for a single hashfast device specified with --usb or the first device found
--hfa-noshed Disable hashfast dynamic core disabling feature
--hfa-temp-overheat <arg> Set the hashfast overheat throttling temperature (default: 95)
--hfa-temp-target <arg> Set the hashfast target temperature (0 to disable) (default: 88)
--hro-freq Set the hashratio clock frequency (default: 280)
--klondike-options <arg> Set klondike options clock:temptarget
--rock-freq <arg> Set RockMiner frequency in MHz, range 125-500 (default: 270)
See ASIC-README for more information regarding these.
FPGA only options:
--bfl-range Use nonce range on bitforce devices if supported
See FGPA-README for more information regarding this.
Cgminer should automatically find all of your Avalon ASIC, BFL ASIC, BitForce
FPGAs, Icarus bitstream FPGAs, Klondike ASIC, ASICMINER usb block erupters,
KnC ASICs, BaB ASICs, Hashfast ASICs, ModMiner FPGAs, BPMC/BGMC BF1 USB ASICs,
Bi*fury USB ASICs, Onestring miner USB ASICs, Hexfury USB ASICs, Nanofury USB
ASICs, Antminer U1/U2/U2+ U3 USB ASICs, Cointerra devices, BFx2 USB ASICs,
Rockminer R-Box/RK-Box/T1 USB ASICs, Avalon2/3/4 USB ASICs and Hashratio USB
ASICs.
---
SETTING UP USB DEVICES
WINDOWS:
On windows, the direct USB support requires the installation of a WinUSB
driver (NOT the ftdi_sio driver), and attach it to the chosen USB device.
When configuring your device, plug it in and wait for windows to attempt to
install a driver on its own. It may think it has succeeded or failed but wait
for it to finish regardless. This is NOT the driver you want installed. At this
point you need to associate your device with the WinUSB driver. The easiest
way to do this is to use the zadig utility which you must right click on and
run as administrator. Then once you plug in your device you can choose the
"list all devices" from the "option" menu and you should be able to see the
device as something like: "BitFORCE SHA256 SC". Choose the install or replace
driver option and select WinUSB. You can either google for zadig or download
it from the cgminer directory in the DOWNLOADS link above.
When you first switch a device over to WinUSB with zadig and it shows that
correctly on the left of the zadig window, but it still gives permission
errors, you may need to unplug the USB miner and then plug it back in. Some
users may need to reboot at this point.
LINUX:
The short version:
sudo cp 01-cgminer.rules /etc/udev/rules.d/
The long version:
On linux, the direct USB support requires no drivers at all. However due to
permissions issues, you may not be able to mine directly on the devices as a
regular user without giving the user access to the device or by mining as
root (administrator). In order to give your regular user access, you can make
him a member of the plugdev group with the following commands:
sudo usermod -G plugdev -a `whoami`
If your distribution does not have the plugdev group you can create it with:
sudo groupadd plugdev
In order for the USB devices to instantly be owned by the plugdev group and
accessible by anyone from the plugdev group you can copy the file
"01-cgminer.rules" from the cgminer archive into the /etc/udev/rules.d
directory with the following command:
sudo cp 01-cgminer.rules /etc/udev/rules.d/
After this you can either manually restart udev and re-login, or more easily
just reboot.
OSX:
On OSX, like Linux, no drivers need to be installed. However some devices
like the bitfury USB sticks automatically load a driver thinking they're a
modem and the driver needs to be unloaded for cgminer to work:
sudo kextunload -b com.apple.driver.AppleUSBCDC
sudo kextunload -b com.apple.driver.AppleUSBCDCACMData
There may be a limit to the number of USB devices that you are allowed to start.
The following set of commands, followed by a reboot will increase that:
sudo su
touch /etc/sysctl.conf
echo kern.sysv.semume=100 >> /etc/sysctl.conf
chown root:wheel /etc/sysctl.conf
chmod 0644 /etc/sysctl.conf
Some devices need superuser access to mine on them so cgminer may need to
be started with sudo
i.e.:
sudo cgminer <insert commands here>
---
Advanced USB options:
The --usb option can restrict how many USB devices are found:
--usb 1:2,1:3,1:4,1:*
or
--usb BAS:1,BFL:1,MMQ:0,ICA:0,KLN:0
or
--usb :10
You can only use one of the above 3
The first version
--usb 1:2,1:3,1:4,1:*
allows you to select which devices to mine on with a list of USB
bus_number:device_address
All other USB devices will be ignored
Hotplug will also only look at the devices matching the list specified and
find nothing new if they are all in use
You can specify just the USB bus_number to find all devices like 1:*
which means any devices on USB bus_number 1
This is useful if you unplug a device then plug it back in the same port,
it usually reappears with the same bus_number but a different device_address
You can see the list of all USB devices on linux with 'sudo lsusb'
Cgminer will list the recognised USB devices
with the '-n' option or the
'--usb-dump 0' option
The '--usb-dump N' option with a value of N greater than 0 will dump a lot
of details about each recognised USB device
If you wish to see all USB devices, include the --usb-list-all option
The second version
--usb BAS:1,BFL:1,MMQ:0,ICA:0,KLN:0
allows you to specify how many devices to choose based on each device
driver cgminer has - the current USB drivers are:
AVA, BAS, BFL, BF1, DRB, HFA, ICA, KLN and MMQ.
N.B. you can only specify which device driver to limit, not the type of
each device, e.g. with BAS:n you can limit how many BFL ASIC devices will
be checked, but you cannot limit the number of each type of BFL ASIC
Also note that the MMQ count is the number of MMQ backplanes you have
not the number of MMQ FPGAs
The third version
--usb :10
means only use a maximum of 10 devices of any supported USB devices
Once cgminer has 10 devices it will not configure any more and hotplug will
not scan for any more
If one of the 10 devices stops working, hotplug - if enabled, as is default
- will scan normally again until it has 10 devices
--usb :0 will disable all USB I/O other than to initialise libusb
---
WHILE RUNNING:
The following options are available while running with a single keypress:
[U]SB management [P]ool management [S]ettings [D]isplay options [Q]uit
U gives you:
[S]ummary of device information
[E]nable device
[D]isable device
[U]nplug to allow hotplug restart
[R]eset device USB
[L]ist all known devices
[B]lacklist current device from current instance of cgminer
[W]hitelist previously blacklisted device
[H]otplug interval (0 to disable)
P gives you:
Current pool management strategy: Failover
[F]ailover only disabled
[A]dd pool [R]emove pool [D]isable pool [E]nable pool
[C]hange management strategy [S]witch pool [I]nformation
S gives you:
[Q]ueue: 1
[S]cantime: 60
[E]xpiry: 120
[W]rite config file
[C]gminer restart
D gives you:
[N]ormal [C]lear [S]ilent mode (disable all output)
[D]ebug:off
[P]er-device:off
[Q]uiet:off
[V]erbose:off
[R]PC debug:off
[W]orkTime details:off
co[M]pact: off
[T]oggle status switching:enabled
[Z]ero statistics
[L]og interval:5
Q quits the application.
The running log shows output like this:
[2013-11-09 11:04:41] Accepted 01b3bde7 Diff 150/128 AVA 1 pool 0
[2013-11-09 11:04:49] Accepted 015df995 Diff 187/128 AVA 1 pool 0
[2013-11-09 11:04:50] Accepted 01163b68 Diff 236/128 AVA 1 pool 0
[2013-11-09 11:04:53] Accepted 9f745840 Diff 411/128 BAS 1 pool 0
The 8 byte hex value are the 1st nonzero bytes of the share being submitted to
the pool. The 2 diff values are the actual difficulty target that share reached
followed by the difficulty target the pool is currently asking for.
---
Also many issues and FAQs are covered in the forum thread
dedicated to this program,
http://forum.bitcoin.org/index.php?topic=28402.0
DISPLAY:
The display is roughly split into two portions, the top status window and the
bottom scrolling log window.
STATUS WINDOW
The status window is split into overall status and per device status.
Overall status:
The output line shows the following:
(5s):2.469T (1m):2.677T (5m):2.040T (15m):1.014T (avg):2.733Th/s
These are exponentially decaying average hashrates over 5s/1m/5m/15m and an
average since the start.
Followed by:
A:290391 R:5101 HW:145 WU:37610.4/m
Each column is as follows:
A: The total difficulty of Accepted shares
R: The total difficulty of Rejected shares
HW: The number of HardWare errors
WU: The Work Utility defined as the number of diff1 shares work / minute
(accepted or rejected).
alternating with:
ST: 22 SS: 0 NB: 2 LW: 356090 GF: 0 RF: 0
ST is STaged work items (ready to use).
SS is Stale Shares discarded (detected and not submitted so don't count as rejects)
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)
Followed by:
Connected to pool.com diff 3.45K with stratum as user me
The diff shown is the current vardiff requested by the pool currently being
mined at.
Followed by:
Block: ca0d237f... Diff:5.01G Started: [00:14:27] Best share: 1.18M
This shows a short stretch about the current block, when the new block started,
and the all time best difficulty share you've found since starting cgminer
this time.
Per device status:
6: HFS Random : 645MHz 85C 13% 0.79V | 2.152T / 1.351Th/s
Each column is as follows:
Temperature (if supported)
Fanspeed (if supported)
Voltage (if supported)
A 5 second exponentially decaying average hash rate
An all time average hash rate
alternating with
6: HFS Random : 645MHz 86C 13% 0.80V | A:290348 R:1067 HW:88 WU:18901.8/m
The total difficulty of accepted shares
The total difficulty of rejected shares
The number of hardware erorrs
The work utility defined as the number of diff1 shares work / minute
LOG WINDOW
All running information is shown here, usually share submission results and
block update notifications, along with device messages and warnings.
[2014-03-29 00:24:09] Accepted 1397768d Diff 3.35K/2727 HFS 0 pool 0
[2014-03-29 00:24:13] Stratum from pool 0 detected new block
---
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 to all the pools on a quota basis. By default, all
pools are allocated equal quotas unless specified with --quota. This
apportioning of work is based on work handed out, not shares returned so is
independent of difficulty targets or rejected shares. While a pool is disabled
or dead, its quota is dropped until it is re-enabled. Quotas are forward
looking, so if the quota is changed on the fly, it only affects future work.
If all pools are set to zero quota or all pools with quota are dead, it will
fall back to a failover mode. See quota below for more information.
The failover-only flag has special meaning in combination with load-balance
mode and it will distribute quota back to priority pool 0 from any pools that
are unable to provide work for any reason so as to maintain quota ratios
between the rest of the pools.
BALANCE:
This strategy monitors the amount of difficulty 1 shares solved for each pool
and uses it to try to end up doing the same amount of work for all pools.
---
QUOTAS
The load-balance multipool strategy works off a quota based scheduler. The
quotas handed out by default are equal, but the user is allowed to specify any
arbitrary ratio of quotas. For example, if all the quota values add up to 100,
each quota value will be a percentage, but if 2 pools are specified and pool0
is given a quota of 1 and pool1 is given a quota of 9, pool0 will get 10% of
the work and pool1 will get 90%. Quotas can be changed on the fly by the API,
and do not act retrospectively. Setting a quota to zero will effectively
disable that pool unless all other pools are disabled or dead. In that
scenario, load-balance falls back to regular failover priority-based strategy.
While a pool is dead, it loses its quota and no attempt is made to catch up
when it comes back to life.
To specify quotas on the command line, pools should be specified with a
semicolon separated --quota(or -U) entry instead of --url. Pools specified with
--url are given a nominal quota value of 1 and entries can be mixed.
For example:
--url poola:porta -u usernamea -p passa --quota "2;poolb:portb" -u usernameb -p passb
Will give poola 1/3 of the work and poolb 2/3 of the work.
Writing configuration files with quotas is likewise supported. To use the above
quotas in a configuration file they would be specified thus:
"pools" : [
{
"url" : "poola:porta",
"user" : "usernamea",
"pass" : "passa"
},
{
"quota" : "2;poolb:portb",
"user" : "usernameb",
"pass" : "passb"
}
]
---
SOLO MINING
Solo mining can be done efficiently as a single pool entry or a backup to
any other pooled mining and it is recommended everyone have solo mining set up
as their final backup in case all their other pools are DDoSed/down for the
security of the network. To enable solo mining, one must be running a local
bitcoind/bitcoin-qt or have one they have rpc access to. To do this, edit your
bitcoind configuration file (bitcoin.conf) with the following extra lines,
using your choice of username and password:
rpcuser=username
rpcpassword=password
Restart bitcoind, then start cgminer, pointing to the bitcoind and choose a
btc address with the following options, altering to suit their setup:
cgminer -o http://localhost:8332 -u username -p password --btc-address 15qSxP1SQcUX3o4nhkfdbgyoWEFMomJ4rZ
Note the http:// is mandatory for solo mining.
---
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.
The WorkTime details 'debug' option adds details on the end of each line
displayed for Accepted or Rejected work done. An example would be:
<-00000059.ed4834a3 M:X D:1.0 G:17:02:38:0.405 C:1.855 (2.995) W:3.440 (0.000) S:0.461 R:17:02:47
The first 2 hex codes are the previous block hash, the rest are reported in
seconds unless stated otherwise:
The previous hash is followed by the getwork mode used M:X where X is one of
P:Pool, T:Test Pool, L:LP or B:Benchmark,
then D:d.ddd is the difficulty required to get a share from the work,
then G:hh:mm:ss:n.nnn, which is when the getwork or LP was sent to the pool and
the n.nnn is how long it took to reply,
followed by 'O' on it's own if it is an original getwork, or 'C:n.nnn' if it was
a clone with n.nnn stating how long after the work was recieved that it was cloned,
(m.mmm) is how long from when the original work was received until work started,
W:n.nnn is how long the work took to process until it was ready to submit,
(m.mmm) is how long from ready to submit to actually doing the submit, this is
usually 0.000 unless there was a problem with submitting the work,
S:n.nnn is how long it took to submit the completed work and await the reply,
R:hh:mm:ss is the actual time the work submit reply was received
If you start cgminer with the --sharelog option, you can get detailed
information for each share found. The argument to the option may be "-" for
standard output (not advisable with the ncurses UI), any valid positive number
for that file descriptor, or a filename.
To log share data to a file named "share.log", you can use either:
./cgminer --sharelog 50 -o xxx -u yyy -p zzz 50>share.log
./cgminer --sharelog share.log -o xxx -u yyy -p zzz
For every share found, data will be logged in a CSV (Comma Separated Value)
format:
timestamp,disposition,target,pool,dev,thr,sharehash,sharedata
For example (this is wrapped, but it's all on one line for real):
1335313090,reject,
ffffffffffffffffffffffffffffffffffffffffffffffffffffffff00000000,
http://localhost:8337,ASC0,0,
6f983c918f3299b58febf95ec4d0c7094ed634bc13754553ec34fc3800000000,
00000001a0980aff4ce4a96d53f4b89a2d5f0e765c978640fe24372a000001c5
000000004a4366808f81d44f26df3d69d7dc4b3473385930462d9ab707b50498
f681634a4f1f63d01a0cd43fb338000000000080000000000000000000000000
0000000000000000000000000000000000000000000000000000000080020000
---
BENCHMARK
The --benchmark option hashes a single fixed work item over and over and does
not submit shares to any pools.
The --benchfile <arg> option hashes the work given in the file <arg> supplied.
The format of the work file is:
version,merkleroot,prevhash,diffbits,noncetime
Any empty line or any line starting with '#' or '/' is ignored.
When it reaches the end of the file it continues back at the top.
The format of the data items matches the byte ordering and format of the
the bitcoind getblock RPC output.
An example file containing bitcoin block #1 would be:
# Block 1
1,0e3e2357e806b6cdb1f70b54c3a3a17b6714ee1f0e68bebb44a74b1efd512098,00000000001
9d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f,1d00ffff,1231469665
However, the work data should be one line without the linebreak in the middle
If you use --benchfile <arg>, then --benchfile-display will output a log line,
for each nonce found, showing the nonce value in decimal and hex and the work
used to find it in hex.
---
RPC API
For RPC API details see the API-README file
---
FAQ
Q: Help, I've started cgminer and everything reads zero!?
A: Welcome to bitcoin mining. Your computer by itself cannot mine bitcoin no
matter how powerful it is. You have to purchase dedicated mining hardware
called ASICs to plug into your computer. See Q regarding ASICs below.
Q: I have multiple USB stick devices but I can't get them all to work at once?
A: Very few USB hubs deliver the promised power required to run as many devices
as they fit if all of them draw power from USB.
Q: I've plugged my devices into my USB hub but nothing shows up?
A: RPis and Windows have incomplete or non-standard USB3 support so they may
never work. It may be possible to get a USB3 hub to work by plugging it into
a USB2 hub. When choosing a hub, USB2 hubs are preferable whenever possible
due to better support all round.
Q: Can I mine on servers from different networks (eg xxxcoin 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 configure cgminer to mine with different login credentials or pools
for each separate device?
A: No.
Q: Can I put multiple pools in the config file?
A: Yes, check the example.conf file. Alternatively, set up everything either on
the command line or via the menu after startup and choose settings->write
config file and the file will be loaded one each startup.
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. Also -O2 is capital o 2, not zero 2.
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: 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 devices working on something
useful and not risk idle periods. You can disable this behaviour with the
option --failover-only.
Q: Is this a virus?
A: Cgminer is being packaged with other trojan scripts and some antivirus
software is falsely accusing cgminer.exe as being the actual virus, rather