ATTN Litecoin GPU Miners - Scrypt support for cgminer

[nitrox]

Use cgminer and these settings
--scrypt -I 19 --shaders 1792 --thread-concurrency 8960 -g 1
Should get 500+ kh/s
also try --thread-concurrency of 17920, may be a little faster
for the 7xxx series you must always use -g 1 to achieve high intensities

a lot of reject A:6 R:85 ~600kH/s

i try a low intensity 15 result :  A:30 R:73 ~370kH/s

still no good result

[penek]

Did you run
export GPU_MAX_ALLOC_PERCENT=100
before running cgminer under Ubuntu?
What are you stock clock rates? Maybe try experimenting there a little with engine and memory clocks upwards and downwards, the hash rates can vary quite a bit depending on the ratio of engine to memory

export GPU_MAX_ALLOC_PERCENT=100 - YES I RUN IT

GPU : 1045Mhz (default : 900MHz)
RAM : 1450MHz (default : 1250MHz)

also try
export GPU_USE_SYNC_OBJECTS=1
with ALLOC in script which runs cgminer

[nitrox]

also try
export GPU_USE_SYNC_OBJECTS=1
with ALLOC in script which runs cgminer

cd cgminer
rm *.bin
export DISPLAY=:0
export GPU_USE_SYNC_OBJECTS=1
export GPU_MAX_ALLOC_PERCENT=100
./cgminer ................

[penek]

also try
export GPU_USE_SYNC_OBJECTS=1
with ALLOC in script which runs cgminer

cd cgminer
rm *.bin
export DISPLAY=:0
export GPU_USE_SYNC_OBJECTS=1
export GPU_MAX_ALLOC_PERCENT=100
./cgminer ................

yes

[nitrox]

on HD7950
with cgminer 2.6 on windows 7 x64 BTC hashe rate is : ~535MHs
whit cgminer 2.6 on XUBUBTU 12.4 x46 BTC hashe rate is : ~495MHs

windows beat up linux in my case whit 40MHs on BTC digging

with cgminer 2.6 on windows 7 x64 LTC hashe rate is : ~250kHs  
whit cgminer 2.6 on XUBUBTU 12.4 x46 LTC hashe rate is : ~254kHs

no so big difference for LTC

edit:
considering that result i think windows is better decision in my case
edit:
this is with 12.4 driver

[penek]

on HD7950
with cgminer 2.6 on windows 7 x64 BTC hashe rate is : ~535MHs
whit cgminer 2.6 on XUBUBTU 12.4 x46 BTC hashe rate is : ~495MHs

windows beat up linux in my case whit 40MHs on BTC digging

with cgminer 2.6 on windows 7 x64 LTC hashe rate is : ~250kHs 
whit cgminer 2.6 on XUBUBTU 12.4 x46 LTC hashe rate is : ~254kHs

try with driver 12.6

[nitrox]

on HD7950 instal driver 12.6
with cgminer 2.6 on windows 7 x64 BTC hashe rate is : ~535MHs
whit cgminer 2.6 on XUBUBTU 12.4 x64 BTC hashe rate is : ~499MHs

windows beat up linux in my case whit 40MHs on BTC digging

with cgminer 2.6 on windows 7 x64 LTC hashe rate is : ~250kHs
whit cgminer 2.6 on XUBUBTU 12.4 x64 LTC hashe rate is : ~300kHs

with 12.6 is a little better,
but is not so good compare 6950 on LTC do ~405kH/s

[penek]

also try
export GPU_USE_SYNC_OBJECTS=1
with ALLOC in script which runs cgminer

cd cgminer
rm *.bin
export DISPLAY=:0
export GPU_USE_SYNC_OBJECTS=1
export GPU_MAX_ALLOC_PERCENT=100
./cgminer ................

with this params try more intensity.. to me this params unlock to incrase intensity and thread-concurrency (with TC not need to use shaders)

[nitrox]

when increasing intensity start rejecting ... 

[penek]

when increasing intensity start rejecting ... 

I'm at a loss

[pekv2]

when increasing intensity start rejecting ...  

I'm at a loss

I believe nitrox is stating that when you increase the intensity, cgminer is likely to have more rejected shares.

[nitrox]

I believe nitrox is stating that when you increase the intensity, cgminer is likely to have more rejected shares.

this is what i meant,
sorry for my bad english i use google translator.

[pekv2]

I believe nitrox is stating that when you increase the intensity, cgminer is likely to have more rejected shares.

this is what i meant,
sorry for my bad english i use google translator.

No biggie, glad to help.

[Luke-Jr]

Merged into BFGMiner (minus the sick bug)

[EskimoBob]

Merged into BFGMiner (minus the sick bug)

A merge and a fix from a guy who is known for is loathing of LTC? Really!

[Luke-Jr]

Merged into BFGMiner (minus the sick bug)

A merge and a fix from a guy who is known for is loathing of LTC? Really!

I didn't merge it for Litecoin. I'm pretty sure Con loathes Litecoin too, and only did it for the bounty.

[EskimoBob]

Merged into BFGMiner (minus the sick bug)

A merge and a fix from a guy who is known for is loathing of LTC? Really!

I didn't merge it for Litecoin. I'm pretty sure Con loathes Litecoin too, and only did it for the bounty.

Listen asshat, I do not see him trolling the alternate cryptocurrencies forum like you do. Go whine about your insecurities somewhere else.

[sgravina]

Help requested.

I have three 5850's

Here is my command:

Code:

export GPU_MAX_ALLOC_PERCENT=100
export GPU_USE_SYNC_OBJECTS=1
  cgminer \
    -o localhost:9332 -u ## -p ## \
    --scrypt \
    --intensity 13 \
    --shaders 1440

Here is what happens:

Code:

 [2012-07-29 19:35:36] Started cgminer 2.6.0


  #pragma unroll
          ^

/tmp/OCLBW3cii.cl(663): warning: unrecognized #pragma
  #pragma unroll
          ^

/tmp/OCLBW3cii.cl(677): warning: unrecognized #pragma
  #pragma unroll
          ^

/tmp/OCLBW3cii.cl(636): warning: variable "ySIZE" was declared but never
          referenced
        const uint ySIZE = (1024/LOOKUP_GAP+(1024%LOOKUP_GAP>0));
                   ^

/tmp/OCLBW3cii.cl(707): warning: unrecognized #pragma
  #pragma unroll
          ^

12 errors detected in the compilation of "/tmp/OCLBW3cii.cl".

 [2012-07-29 19:35:38] Failed to init GPU thread 0, disabling device 0
 [2012-07-29 19:35:38] Restarting the GPU from the menu will not fix this.
 [2012-07-29 19:35:38] Try restarting cgminer.
Press enter to continue:

[-ck]

Update your sdk, and note that cgminer 2.6.0 is broken

[iCEBREAKER]

Does this scrypt varient of cgminer support -c cgminer.conf for multiple pool failover?

I'm away from my rig or I'd experiment and find out myself.

Thx. 

PS Con, you are the best!