ATTN Litecoin GPU Miners - Scrypt support for cgminer

[Greedi]

I'm working on an idiots guide to setting up cgminer. Stay tuned.

+1

[tacotime]

Please do, my 7770 pulls 20kh/s max on cgminer.  I tried playing with it for an hour and gave up.  Reaper gets 140kh/s, which also kind of sucks.  Mining BTC I get 200MH/s easy.

[Tittiez]

Please do, my 7770 pulls 20kh/s max on cgminer.  I tried playing with it for an hour and gave up.  Reaper gets 140kh/s, which also kind of sucks.  Mining BTC I get 200MH/s easy.

I don't know individual settings, I'm just simply using the --shaders command in the example and telling people how to use it (mostly hoping it is updated with more witchcraft).

Maybe I'll set up a spreadsheet so people can submit to me settings to add by a google docs/drive form.

See, me hoping for witchcraft:

--shaders ####
- This tries to choose the best settings for mining scrypt on your graphics cards. It does mathy witchcraft stuff to chooses the best settings for your gpu based on your shaders.
To find the best number for this, look at the table in this post, find your gpu and set this setting as the number of shaders your card has.

[ThiagoCMC]

I'm working on an idiots guide to setting up cgminer. Stay tuned.

Lets improve this: https://bitcointalk.org/index.php?topic=95718.0 

To 5XXX and 6XXX cards?!

Cheers!
Thiago

[Tittiez]

I'm working on an idiots guide to setting up cgminer. Stay tuned.

Lets improve this: https://bitcointalk.org/index.php?topic=95718.0  

To 5XXX and 6XXX cards?!

Cheers!
Thiago

Its a windows guide, I might make a linux one later on but I've been working my ass off to get this pool up and running.
I'm out for the night. The guide is pretty much done, but the pool isn't exactly ready yet so I'm not releasing the link. Should be done sometime late tomorrow.

Actually I got 30 more minutes in me, if anyone would like to hop onto my pool (its still a beta) for the night and help me make sure everything is working (if things don't work I promise you will still get your coins), PM me.

[ThiagoCMC]

Windows... uuurgh... Never mind... I'll try it tomorrow with my 5XXX cards... Tks anyway!

[Tittiez]

Windows... uuurgh... Never mind... I'll try it tomorrow with my 5XXX cards... Tks anyway!

What cards? And the guide, when it comes down to configurating the cards, works the same way. I'm just explaining how to use --shaders.

The guide won't have sureset settings for every card guys. Wow if I had that kinda time... no it explains how to set up cgminer, and it gives some insight as to finding the best settings.

[Tittiez]

Nobody going to help me test my pool for tonight? I know at least payouts are working, I have already found two blocks. I just need to make sure pushpool will run fine under some load and make sure nothing fucks up in one night. Its PPLNS.

Edit:
Oh well, I'm out.

[-ck]

Don't forget people do:
export GPU_MAX_ALLOC_PERCENT=100
before starting in any linux guide.

[ThiagoCMC]

Don't forget people do:
export GPU_MAX_ALLOC_PERCENT=100
before starting in any linux guide.

Okay! Thanks!

[ThiagoCMC]

Windows... uuurgh... Never mind... I'll try it tomorrow with my 5XXX cards... Tks anyway!

What cards? And the guide, when it comes down to configurating the cards, works the same way. I'm just explaining how to use --shaders.

The guide won't have sureset settings for every card guys. Wow if I had that kinda time... no it explains how to set up cgminer, and it gives some insight as to finding the best settings.

5850
5870
5970

[-ck]

Don't forget people do:
export GPU_MAX_ALLOC_PERCENT=100
before starting in any linux guide.

Okay! Thanks!

Actually you probably should add this also:
export GPU_USE_SYNC_OBJECTS=0
EDIT: export GPU_USE_SYNC_OBJECTS=1

I might add that the first percentage is not set in stone yet, perhaps something like 40% would actually be better... we're still working out the witchcraft brew.

[Dargo]

Actually 40% you probably should add this also:
export GPU_USE_SYNC_OBJECTS=0

What does that command do exactly? I know that setting this variable to 1 solved the 100% CPU bug for some, but I've never found any explanation of it.

[-ck]

export GPU_USE_SYNC_OBJECTS=0

What does that command do exactly? I know that setting this variable to 1 solved the 100% CPU bug for some, but I've never found any explanation of it.

Beats me 

[dostortugas]

So guys, ckolivas asked me some hours ago to report back with a "windows lost again" setup!

MSI 6970 Lightning @945c/1375m

Code:

export GPU_USE_SYNC_OBJECTS=0

was set to 1 for bitcoins cpu hogging

Code:

export GPU_MAX_ALLOC_PERCENT=40

you need to get the value specific for your card set! 100 crashes kernel for me 30 drops hashrate to 70kh/s

Code:

./cgminer --scrypt --shaders 1538 -I 16

Yes, exactly! I did not set anything else..
Results in

Code:

GPU 0:                |  428.2/ 434.0Kh/s | A:11354 R:140 HW:0 U:24.57/m I:16

for windows it was some like 390Kh/s with U averaging at <22/m

[Tittiez]

Has anyone got more then 207kh/s out of a 5770?

[rav3n_pl]

My 6770 is spiking up to 200kh on reaper, so it looks like a limit.

[Schleicher]

When I start cgminer (pointing to p2pool) I get hundreds of shares in the first seconds:

After that it slows down to a normal level.
Any idea why?

[Zoiner]

If you had used p2pool before and switched off the system will have accumulated partial shares and when you restart it catches up again.

[dellech]

export GPU_USE_SYNC_OBJECTS=0

What does that command do exactly? I know that setting this variable to 1 solved the 100% CPU bug for some, but I've never found any explanation of it.

Beats me  

I just tried to mine with GPU_USE_SYNC_OBJECTS=0 ... got 247 Kh/s and cgminer used 66% CPU
without it I have 259 Kh/s and CPU usage is at 1%


and let me add: on my 5850 exporting GPU_MAX_ALLOC_PERCENT=50 lets me start 2 GPU threads and increases rate to 274 Kh/s
(40% abut the same hash rate) ... it uses TC 2880 instead of TC 7200 with 100% ...

up from 60% I must use -g 1