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Author Topic: ATTN Litecoin GPU Miners - Scrypt support for cgminer  (Read 169338 times)
dishwara
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July 24, 2012, 06:17:25 PM
 #361

i used shaders option with this release http://www.mediafire.com/?0ue7860yv89o05y on windows 7 64 bit & getting this error

Code:
[2012-07-24 23:43:53] cgminer.exe: --shaders: unrecognized option

My bat file is cgminer.exe --scrypt --url http://lc.ozco.in:9332 --userpass xxx:xxx --shaders 1600 -I 13
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ailikun
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July 24, 2012, 06:30:27 PM
 #362

ckolivas just released this new option.

but nobody have compiled a new version of cgminer yet.

Komuto budet Herovato is definitely the chief engineer of bfl)
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July 24, 2012, 07:13:56 PM
 #363

ckolivas just released this new option.

but nobody have compiled a new version of cgminer yet.

--shaders

win32: http://www.mediafire.com/?prbt07a4scihahm
Bigal
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July 24, 2012, 07:23:11 PM
 #364

Under Ubuntu 12.04 with 12.6 drivers and sdk  with the latest build of cgminer the highest you can set the thread concurrency is 2048 I'm trying to figure why I guess that is the limit in cgminer and not reaper if the kernels are similar?

four 5850s

"intensity" : "11,11,11,11",
"vectors" : "1,1,1,1",
"worksize" : "128,128,128,128",
"kernel" : "scrypt,scrypt,scrypt,scrypt",
"gpu-engine" : "0-750,0-700,0-700,0-700",
"gpu-memclock" : "1000,1000,1000,1000",
"gpu-vddc" : "1.000,0.950,0.950,0.950",
"gpu-threads" : "2",
"scrypt" : true,

this works perfectly at -I 11  ~675 kh
at -I 12 start errors miss-target

I get the same exact results under reaper

worksize 128
aggression 11
threads_per_gpu 2
sharethreads 18
lookup_gap 2
gpu_thread_concurrency 2048

aggression 11 works great no errors  ~ 675 kh
aggression 12 throws errors


Ok the best results for reaper for me seems to be

worksize 128
aggression 12
threads_per_gpu 2
sharethreads 18
lookup_gap 2
gpu_thread_concurrency 5760

this works great no errors ~1030kh pool reports roughly same

I don't have any 5850s running under windows to seem if the results are the same. The same settings that work on both give nearly identical khs in both programs, but the difference is the thread concurrency maximum of 2048 in cgminer vs. 5760 in reaper? this even make sense lol?

I have a couple 5870s I'm need to test this out on but I'm thinking 4 x shader count is the optimum?

I just noticed that reaper builds the buffer at 360mb @ 5760tc   4 x 360 = 1440

The Small Time Miner Pools   CryptoCoin Ticker   BTC 1EHV2BY8JcvpBqnMqq5BSkbZvFHT7ndpnz    LTC  LaBigaLvm7L8XT5urnwJW5MpoArBAjsk2X
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July 24, 2012, 07:25:25 PM
 #365

ckolivas just released this new option.

but nobody have compiled a new version of cgminer yet.

--shaders

win32: http://www.mediafire.com/?prbt07a4scihahm

Sweet. Works on 7970 - gets the optimum values automatically.
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July 24, 2012, 07:50:06 PM
 #366

doesnt seem to work right for me..
Each time i try to launch it, my fourth 7970 crashes..

But it works well, with an earlier version

Komuto budet Herovato is definitely the chief engineer of bfl)
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July 24, 2012, 08:00:48 PM
 #367

ckolivas just released this new option.

but nobody have compiled a new version of cgminer yet.

--shaders

win32: http://www.mediafire.com/?prbt07a4scihahm

thnx bud.
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July 24, 2012, 08:01:20 PM
 #368

Does CGminer-Scrypt support 1400 x Tesla M2050, the card BX use to launch the attack against litecoin network ?
How many kH/s you can get with that NVIDIA card ?
Is it bigger than 90 kH/s ?

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July 24, 2012, 08:14:40 PM
 #369

Tesla M2050    79.8          1550    448    DiabloMiner
Tesla M2050    94.5          1550       poclbm

https://en.bitcoin.it/wiki/Mining_hardware_comparison#Nvidia

¤¿¤

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July 24, 2012, 08:16:51 PM
 #370

Added the --shaders option now
- Make the thread concurrency and lookup gap options hidden on the command line and autotune parameters with a newly parsed --shaders option.

So you should only need to try --shaders and -I now. Note that any intensity above 13 is a gamble and highly dependent on hardware/software combination as to whether it's better, so -I 13 is a good start.

Here's the table again:
Code:
GPU  Processing Elements
7750 512
7770 640
7850 1024
7870 1280
7950 1792
7970 2048

6850 960
6870 1120
6950 1408
6970 1536
6990 (6970x2)

6570 480
6670 480
6790 800

6450 160

5670 400
5750 720
5770 800
5830 1120
5850 1440
5870 1600
5970 (5870x2)

And for those who need me to spell it out, let's say you have a 5830, try this first:
--shaders 1120 -I 13


This is horrible for me. 2 5850's.

Code:
[P]ool management [G]PU management [S]ettings [D]isplay options [Q]uit
 GPU 0:  43.0C 3581RPM |  13.4/ 15.1Kh/s | A:1 R:0 HW:0 U:1.73/m I:13
 GPU 1:  46.0C 3410RPM |  50.4/ 53.6Kh/s | A:1 R:0 HW:0 U:1.73/m I:13

cgminer --scrypt -o http://site:port -u username -p password --shaders 1440 --intensity 13

vs

809 khash/s


cgminer --scrypt -o http://site:port -u username -p password --worksize 256 --lookup-gap 2 --thread-concurrency 7200 -g 1 --intensity 19
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July 24, 2012, 08:55:55 PM
 #371

Okay, maybe I am being painfully slow today but...

1) Litecoin is intended to be a CPU coin, right ?

2) So, from this thread it appears that GPU mining it in a manner that is more economically effective than CPU mining is possible, right ?

But, if both 1 and 2 is true, doesn't that mean that litecoin is kinda...pointless?
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July 24, 2012, 09:13:23 PM
 #372

Okay, maybe I am being painfully slow today but...

1) Litecoin is intended to be a CPU coin, right ?

2) So, from this thread it appears that GPU mining it in a manner that is more economically effective than CPU mining is possible, right ?

But, if both 1 and 2 is true, doesn't that mean that litecoin is kinda...pointless?
Litecoin is a scam - there is no such thing as a "CPU coin" and never can be. I think Con is only doing this because he's being paid - in Bitcoins Wink

https://en.bitcoin.it/wiki/Litecoin#Criticism

bitcoiners
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July 24, 2012, 09:18:04 PM
 #373

Okay, maybe I am being painfully slow today but...

1) Litecoin is intended to be a CPU coin, right ?

2) So, from this thread it appears that GPU mining it in a manner that is more economically effective than CPU mining is possible, right ?

But, if both 1 and 2 is true, doesn't that mean that litecoin is kinda...pointless?
Litecoin is a scam - there is no such thing as a "CPU coin" and never can be. I think Con is only doing this because he's being paid - in Bitcoins Wink

https://en.bitcoin.it/wiki/Litecoin#Criticism

Well considering you wrote that.  It's totally believable! lol.
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July 24, 2012, 09:32:14 PM
 #374

Litecoin is a scam - there is no such thing as a "CPU coin" and never can be. 

Could you go into more details on this one ?
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July 24, 2012, 09:35:29 PM
 #375

Litecoin is a scam - there is no such thing as a "CPU coin" and never can be. 

Could you go into more details on this one ?
It is impossible to design a proof-of-work that cannot be specialized (eg, ASICs). Designing them to be resistent to existing technologies increases the security risk such specialization presents. Simple proofs like SHA256 (in Bitcoin) have proven to work well, since it scales up in tiers (CPU -> GPU -> FPGA -> ASIC).

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July 24, 2012, 09:37:10 PM
 #376

This thread is not the forum for that discussion.

Primary developer/maintainer for cgminer and ckpool/ckproxy.
Pooled mine at kano.is, solo mine at solo.ckpool.org
-ck
bitcoiners
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July 24, 2012, 09:42:00 PM
 #377

Litecoin is a scam - there is no such thing as a "CPU coin" and never can be. 

Could you go into more details on this one ?
It is impossible to design a proof-of-work that cannot be specialized (eg, ASICs). Designing them to be resistent to existing technologies increases the security risk such specialization presents. Simple proofs like SHA256 (in Bitcoin) have proven to work well, since it scales up in tiers (CPU -> GPU -> FPGA -> ASIC).

Some of you Bitcoin purists really are scared of LTC aren't you?  Start your own thread if you'd like to discuss this.  I'm sure some would be more than happy to talk.  Otherwise STFU.
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July 24, 2012, 11:13:16 PM
 #378

Under Ubuntu 12.04 with 12.6 drivers and sdk  with the latest build of cgminer the highest you can set the thread concurrency is 2048 I'm trying to figure why I guess that is the limit in cgminer and not reaper if the kernels are similar?

four 5850s

"intensity" : "11,11,11,11",
"vectors" : "1,1,1,1",
"worksize" : "128,128,128,128",
"kernel" : "scrypt,scrypt,scrypt,scrypt",
"gpu-engine" : "0-750,0-700,0-700,0-700",
"gpu-memclock" : "1000,1000,1000,1000",
"gpu-vddc" : "1.000,0.950,0.950,0.950",
"gpu-threads" : "2",
"scrypt" : true,

this works perfectly at -I 11  ~675 kh
at -I 12 start errors miss-target

I get the same exact results under reaper

worksize 128
aggression 11
threads_per_gpu 2
sharethreads 18
lookup_gap 2
gpu_thread_concurrency 2048

aggression 11 works great no errors  ~ 675 kh
aggression 12 throws errors


Ok the best results for reaper for me seems to be

worksize 128
aggression 12
threads_per_gpu 2
sharethreads 18
lookup_gap 2
gpu_thread_concurrency 5760

this works great no errors ~1030kh pool reports roughly same

I don't have any 5850s running under windows to seem if the results are the same. The same settings that work on both give nearly identical khs in both programs, but the difference is the thread concurrency maximum of 2048 in cgminer vs. 5760 in reaper? this even make sense lol?

I have a couple 5870s I'm need to test this out on but I'm thinking 4 x shader count is the optimum?

I just noticed that reaper builds the buffer at 360mb @ 5760tc   4 x 360 = 1440

cgminer's buffer build, thread concurrency, gap lookup and intensity/aggression work identically to raper so you will get identical buffer results, base performance etc with the same settings. The only thing I do differently is I check for errors when submitting the requests to opencl. You CAN override the upper limit for thread concurrency by just putting it in manually. However what likely happens is the error from the kernel running happens randomly. cgminer does not ignore the errors, whereas raper doesn't even check for them, it just keeps sending the kernel over and over ignoring whether it's working or not. Why linux has lower reported memory limits on this occasion to windows I don't know but I'm guessing it's just the driver differences. I could go in and make it ignore the results of failed kernel queueing, but that's so counter to good programming it's ridiculous. However it seems I have no choice...

Primary developer/maintainer for cgminer and ckpool/ckproxy.
Pooled mine at kano.is, solo mine at solo.ckpool.org
-ck
pekv2
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July 24, 2012, 11:33:54 PM
 #379

Added the --shaders option now
- Make the thread concurrency and lookup gap options hidden on the command line and autotune parameters with a newly parsed --shaders option.

So you should only need to try --shaders and -I now. Note that any intensity above 13 is a gamble and highly dependent on hardware/software combination as to whether it's better, so -I 13 is a good start.

Here's the table again:
Code:
GPU  Processing Elements
7750 512
7770 640
7850 1024
7870 1280
7950 1792
7970 2048

6850 960
6870 1120
6950 1408
6970 1536
6990 (6970x2)

6570 480
6670 480
6790 800

6450 160

5670 400
5750 720
5770 800
5830 1120
5850 1440
5870 1600
5970 (5870x2)

And for those who need me to spell it out, let's say you have a 5830, try this first:
--shaders 1120 -I 13


This is horrible for me. 2 5850's.

Code:
[P]ool management [G]PU management [S]ettings [D]isplay options [Q]uit
 GPU 0:  43.0C 3581RPM |  13.4/ 15.1Kh/s | A:1 R:0 HW:0 U:1.73/m I:13
 GPU 1:  46.0C 3410RPM |  50.4/ 53.6Kh/s | A:1 R:0 HW:0 U:1.73/m I:13

cgminer --scrypt -o http://site:port -u username -p password --shaders 1440 --intensity 13

vs

809 khash/s


cgminer --scrypt -o http://site:port -u username -p password --worksize 256 --lookup-gap 2 --thread-concurrency 7200 -g 1 --intensity 19

-ck
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July 24, 2012, 11:52:00 PM
 #380

This is horrible for me. 2 5850's.

Code:
[P]ool management [G]PU management [S]ettings [D]isplay options [Q]uit
 GPU 0:  43.0C 3581RPM |  13.4/ 15.1Kh/s | A:1 R:0 HW:0 U:1.73/m I:13
 GPU 1:  46.0C 3410RPM |  50.4/ 53.6Kh/s | A:1 R:0 HW:0 U:1.73/m I:13

cgminer --scrypt -o http://site:port -u username -p password --shaders 1440 --intensity 13

vs

809 khash/s


cgminer --scrypt -o http://site:port -u username -p password --worksize 256 --lookup-gap 2 --thread-concurrency 7200 -g 1 --intensity 19
What debugging do you get running it with -D -T and then stopping it before it starts mining about size when you start it with --shaders 1440? Look for messages about buffer, lookup gap and thread concurrency.

Primary developer/maintainer for cgminer and ckpool/ckproxy.
Pooled mine at kano.is, solo mine at solo.ckpool.org
-ck
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