ATTN Litecoin GPU Miners - Scrypt support for cgminer - page 22.

dishwara

legendary

Activity: 1855

Merit: 1016

Funny, anything above 6144 reduces hash rate, while anything below 6144 increases hash rate, but all r stales only, nothing is valid.

Always using aggression 16 only

abbeytim

sr. member

Activity: 438

Merit: 250

oh with reaper i run 18 aggression you can run up to 20 i see your only running 13 with reaper so up that to 18 and see what happens

-ck

legendary

Activity: 4088

Merit: 1631

Ruu \o/

BTW don't try to use this git tree code for regular bitcoin mining as it's likely broken for now.

abbeytim

sr. member

Activity: 438

Merit: 250

try 8192 with reaper see if it gets better plus a lot of them were oc core and mem clocks

dishwara

legendary

Activity: 1855

Merit: 1016

Quote from: foggyb on July 20, 2012, 06:47:02 PM

Quote from: -ck on July 20, 2012, 06:44:46 PM

What were your settings?

litecoin.conf:

Code:

worksize 256
aggression 13
threads_per_gpu 5
cpu_mining_threads 0
sharethreads 18
lookup_gap 2
gpu_thread_concurrency 10240

reaper.conf:

Code:

kernel reaper.cl
save_binaries yes
enable_graceful_shutdown yes
long_polling yes

platform 1
device 0

mine litecoin

Using reaper my 5870(cypress) with 1GB in windows 7, 64 any gpu_thread_concurrency over 6144 , just reduces hash speed to ~20.
@ gpu_thread_concurrency 6144, it gives me 368kH/s

I dont know how others able to get 400+ on 5000 series with 12.6 driver.

LTC buffer size : 384MB shown in reaper seems controlling hash rate.
Increasing gpu_thread_concurrency , increases LTC buffer size

Mobius

hero member

Activity: 988

Merit: 1000

Quote from: abbeytim on July 21, 2012, 07:29:01 AM

excuse the solidcoin icon too thats from way back Wink

Ummm, sure it is.

-ck

legendary

Activity: 4088

Merit: 1631

Ruu \o/

Quote from: abbeytim on July 21, 2012, 07:29:01 AM

excuse the solidcoin icon too thats from way back Wink

one question do you have share threads 18 default i know thats what i have in reaper

im not a programer so was just wondering

Share threads have nothing to do with cgminer's functioning.

abbeytim

sr. member

Activity: 438

Merit: 250

heres reaper for comparison

abbeytim

sr. member

Activity: 438

Merit: 250

excuse the solidcoin icon too thats from way back Wink

one question do you have share threads 18 default i know thats what i have in reaper

im not a programer so was just wondering

abbeytim

sr. member

Activity: 438

Merit: 250

doing about 430kh/s now

heres a screenshot

http://i.imgur.com/JBBoK.jpg

excuse my messy desktop Grin

abbeytim

sr. member

Activity: 438

Merit: 250

thx for releasing ckolivas

played around a little max i could get was

420 total kh/s on a 5830 and 5850 in a pc

where as reaper gets 563 kh/s total

i will play around with it later thx again for releasing it

thx for compiling a windows build Tittiez

--thread-concurrency 8192 -I 13 -g 1 were my settings if i set - g any higher it would slow to 16kh/s and i also tried 6144 and 3200 for concurrency

hope this helps others

Tittiez

hero member

Activity: 686

Merit: 500

Quote from: -ck on July 21, 2012, 06:02:34 AM

I'm not taking any "bug reports", only what works. Try lower threads for higher concurrencies and vice versa and so on. All combinations that worked on raper consider irrelevant on this code.

Nice to know, I will try that.

-ck

legendary

Activity: 4088

Merit: 1631

Ruu \o/

I'm not taking any "bug reports", only what works. Try lower threads for higher concurrencies and vice versa and so on. All combinations that worked on raper consider irrelevant on this code.

Tittiez

hero member

Activity: 686

Merit: 500

Well have my bug report, it seems setting the concurrency too high gives a:

Code:

Error: clSetKernelArg of all params failed.

I can't go any higher then 3200 for the concurrency.

My 5770 pulls 130kh/s
My 6850 pulls 170kh/s

(The above is also without overclocks)

Code:

cgminer --scrypt -o x -u x -p x --lookup-gap 2 --thread-concurrency 3200 -I 13 -g 4

Its a start! Cheesy

Edit:

With some small overclocks:

Seeing cgminer mine scrypt, its like a dream.

-ck

legendary

Activity: 4088

Merit: 1631

Ruu \o/

By the way I think I can improve marginally on the kernel with time, but for the moment, it is what it is...

Tittiez

hero member

Activity: 686

Merit: 500

Uploading a win32 build, give me a few.

I think we should make a thread for bug reports/best settings/etc and leave this thread for the discussion only, so its not clogged with the bug reports that are about to flow in.

Edit:

win32: http://www.mediafire.com/?8mztfftmwcl0bqc

Includes the required .dll files.

Tachikoma

hero member

Activity: 938

Merit: 1000

Forgetting about reaper settings actually helped and it boots properly now. Problem now is all my shares are rejected, I will try to mess around with them till I get some accepted shares

Edit

Got working settings on my 6800:

Code:

./cgminer --scrypt -I 11 -g 1 --url lc.ozco.in:9332 --lookup-gap 2 --thread-concurrency 2048 --userpass Someone.something:orother

Setting the thread-concurrency higher will segfault the app.
Setting intensity higher then 11 will result in more invalid shares then valid once
Setting lookup-gap of 1 will segfault the app
Setting lookup-gap over 2 will slow down the mhash

At these settings I'm mining at 145Mhash, which is 55Mhash slower then reaper for me at the moment.

Waiting to hear other members experiences.

-ck

legendary

Activity: 4088

Merit: 1631

Ruu \o/

Don't go over intensity 13. Other than that, you're all on your own to experiment. It is slightly different to raper[sic] so it will need different parameters.

Tachikoma

hero member

Activity: 938

Merit: 1000

I have been playing around with it on my 6800. The good news: No crashes just yet! The bad news, I can't get it to hash matching my reaper config as much as I can.

Code:

./cgminer --scrypt --url lc.ozco.in:9332 --lookup-gap 2 --thread-concurrency 6144 --userpass Something.other:orsomething

[2012-07-21 10:21:57] Started cgminer 2.5.0
[2012-07-21 10:21:58] Probing for an alive pool
[2012-07-21 10:21:58] Long-polling activated for http://lc.ozco.in:9332/LP
[2012-07-21 10:21:58] Pool 0 http://lc.ozco.in:9332 alive
[2012-07-21 10:21:58] Disabling extra threads due to dynamic mode.
[2012-07-21 10:21:58] Tune dynamic intensity with --gpu-dyninterval
[2012-07-21 10:21:58] Rejected 097da80a.83f4e600 GPU 0 (target-miss)
[2012-07-21 10:21:58] Rejected 3cb45b47.b230be19 GPU 0 (target-miss)
[2012-07-21 10:21:59] Pool 0 communication failure, caching submissions
[2012-07-21 10:21:59] Pool 0 communication resumed, submitting work
[2012-07-21 10:21:59] Rejected 44a60e0c.b480ab39 GPU 0 (target-miss)
[2012-07-21 10:21:59] Pool 0 communication failure, caching submissions
[2012-07-21 10:21:59] Pool 0 communication resumed, submitting work
[2012-07-21 10:21:59] Rejected 4283d0ef.0d61d08c GPU 0 (target-miss)
[2012-07-21 10:21:59] Pool 0 communication failure, caching submissionsSegmentation fault (core dumped)

If anybody can get it to work on a 6800 please let me know your settings.

ckolivas: Can I somehow get some debug information for you, or is that not necessary at this point.

-ck

legendary

Activity: 4088

Merit: 1631

Ruu \o/

GIT TREE UP FOR THE BRAVE! (This is not remotely a final release candidate)

https://github.com/ckolivas/cgminer/tree/newscrypt

Be aware that bad parameters will almost routinely crash your GPUs and there is no easy way to know what will and won't work.

--lookup-gap Set GPU lookup gap for scrypt mining, comma separated
--thread-concurrency Set GPU thread concurrency for scrypt mining, comma separated
--scrypt Use the scrypt algorithm for mining (litecoin only)

For the 7970s I used the following:

--scrypt --lookup-gap 2 --thread-concurrency 8192 -g 4 -I 13

Don't go above intensity 13.

Blow yourselves away and be prepared for many reboots....

edit: No there is no windows binary as yet...

Topic: ATTN Litecoin GPU Miners - Scrypt support for cgminer - page 22. (Read 175855 times)