Topic: ATTN Litecoin GPU Miners - Scrypt support for cgminer - page 15. (Read 175855 times)

Great. I guess I can put in a database into the software to lookup the best values after querying the device... maybe soon.

OH. I read wrong, thank you for clarifying.

And those actually pull better numbers.

Now I can give my friend (and anyone else) better number to try too. Awesome.

6850 is 960
5770 is 800

Therefore you should try tc of
6850: 7680
5770: 8000

No it wont pick the best. Read again. It will pick the largest. Then find the multiple of your shaders less than or equal to that and YOU set that manually. That's why I put that list of shader counts below...

5850 at 775 core / 1000 mem

I have some 6570 recommended settings that's all I tested out last night , testing 1 card at a time

AMD Radeon HD 6570 Recommended Settings:

--scrypt --worksize 256 --lookup-gap 2 --thread-concurrency 4096 -g 2 -I 17

Anyone using cgminer on a 6770, 5830, or 6950 have any recommended settings? My friend wants to mine and we got about 150kh/s from his 6770, 228kh/s from the 5830, and 356kh/s from the 6950. But I'm wondering if any more is possible.

I know there is room for improvement for the 5830.

How to understand that:
cgminer with Nvidia GF 560 OC (--scrypt --lookup-gap 2 --thread-concurrency 8192 -w 256 -g 1 -I 20) say
 [2012-07-23 21:48:33] Maximum buffer memory device 0 supports says 268353536, your scrypt settings come to 536870912
but continues work

but with ATI 6930 and 6870 (--scrypt -I 10 -w 256 --lookup-gap 2 --thread-concurrency 4096 -g 2) with the same message
 [2012-07-23 21:58:43] Maximum buffer memory device 0 supports says 134217728, your scrypt settings come to 268435456
says the following
 [2012-07-23 21:58:43] Error -61: clCreateBuffer (padbuffer8), decrease CT or increase LG
 [2012-07-23 21:58:43] Failed to init GPU thread 0, disabling device 0

the best to ATI was: --scrypt -I 10 -w 128 (worse 64) --lookup-gap 2 --thread-concurrency 1280,1120 -g 2
if intensivity >10 -- only rejects (target-miss)...

Great! I'll rebuild it all, I just woke up.

Edit:

Well I started it up with no settings like you said, my result?

Top is 6850 and bottom is 5770. Am I misunderstanding, I thought it was supposed to select the best values? It selected 8192 for both of them.

Yeah, I'll stick with my settings that are supposed to produce invalids but aren't. My 6850 runs at 6144 and I can take it up 15+ in intensity. My 5770 running at 3584 and I push intensity 18 on it without any invalids.


And the win32 build that includes the latest 4 commits:
http://www.mediafire.com/?7yg352cu8mxwnuw

I'm receiving reports that cgminer doesn't work fine with Coinotron. I checked it out myself and indeed there seems to be some kind of incompatibility. I'm wondering what could be source of the issue. Does cgminer support getworks with lower than base share targets ? Does it support LP messages from different port than mining port?

Below is command to start cgminer and 4 min long log. I'm using geforce 560ti . Its hashrate is 75KH/s according to reaper. Cgminer says 7.9 Kh/s. And during 4 minutes pool didn't receive single share.

cgminer --scrypt --url coinotron.com:9322 --lookup-gap 2  --thread-concurrency 6144 --userpass xxx:xxx


--------------------------------------------------------------------------------
 (5s):7.9 (avg):7.8 Kh/s | Q:12  A:0  R:0  HW:0  E:0%  U:0.0/m
 TQ: 1  ST: 1  SS: 0  DW: 2  NB: 2  LW: 0  GF: 0  RF: 0
 Connected to http://coinotron.com:9322 with LP as user
 Block: c821b82a7c18e903d6653132c62663d7...  Started: [18:39:32]
--------------------------------------------------------------------------------
 [P]ool management [G]PU management ettings [D]isplay options [Q]uit
 GPU 0:   7.9/  7.8Kh/s | A:0 R:0 HW:0 U:0.00/m I:-10
--------------------------------------------------------------------------------

 [2012-07-23 18:35:22] Started cgminer 2.5.0
 [2012-07-23 18:35:22] Probing for an alive pool
 [2012-07-23 18:35:23] Long-polling activated for http://coinotron.com:8344
 [2012-07-23 18:35:23] Pool 0 http://coinotron.com:9322 alive
 [2012-07-23 18:35:23] Disabling extra threads due to dynamic mode.
 [2012-07-23 18:35:23] Tune dynamic intensity with --gpu-dyninterval
 [2012-07-23 18:35:25] Thread 1 being disabled
 [2012-07-23 18:39:32] LONGPOLL from pool 0 detected new block
 [2012-07-23 18:41:13] New block detected on network before longpoll
 [2012-07-23 18:41:54] New block detected on network before longpoll

I thought the -D -T commands applied to the latest git version, not the compiled exe?

Seeing as it is cgminer you might want to try:


--url and --userpass are not cgminer options afik

Running this

gives me continuously running text, which i cant able to read in windows 7, 64 bit

EDIT: "i used win32, includes commits 94c94d6 and 1711b4e: http://www.mediafire.com/?18wth7mby8evcbb"

this miner from tittiez

look to post 306 (Summary:...)
maybe debug mode help you

sorry to ask, i cant able to correctly find I & concurrency for 5870
can anyone help me?

Thanks again, So I don't need to rebuild rigs if I use a comma.

Note that you WILL get better hashrates from using cgminer because of massively improved behaviour with respect to getting work, submitting shares and managing longpolls. So no, I don't believe the results are equivalent overall.

Check the help...
--lookup-gap   Set GPU lookup gap for scrypt mining, comma separated
--thread-concurrency Set GPU thread concurrency for scrypt mining, comma separated                                                               

Finally, the word is out. Now I don't need to post that long post I was telling about on BTC-e.com chat. Thanks developer, hopefully Graet will understand that he just didn't tweak his Reaper enough...  

Back on-topic, thanks for the development. Although my results are lower with CGMiner than with Reaper, I like the program.
The reason why it is running slower... I have 2 6950's, one with 1536 shaders and one with 1408 shader. I set reaper to use 4*1536 = 6144 concurrency and when I do this with CGMiner and add some intensity (say 18, just like reaper), the 1536 will produce a good hashrate (the same as reaper), but the 1408 shader counting card will throttle itself somewhere between 80 and 100% load. It's worse with a higher intensity.
Is it possible to separate the concurrency per GPU? Can I simply enter 6144,5632 ? Maybe that will work around the problem. Reaper is showing 100% load on both cards with a combined hashing rate of 873.7KH/s, 1.2% stales on a slight overclock (30+MHz core on 1536-shader and 50+MHz core on 1408-shader). CGMiner maxes out at 840 because of this problem.

This weird load-thing was my only concern.

P.s. it's not the temperature... it would throttle all the way back to 0% if it is overheating.
P.p.s. you need an LTC addy. Think it would fill up pretty fast.

Excellent !! Thank you ckolivas

You just forced me to rebuild some rigs