ATTN Litecoin GPU Miners - Scrypt support for cgminer

[mc_lovin]

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.

pretty sure it locks the CPU usage to one core.  99% sure.

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[-ck]

The latest git version will limit the size of the thread concurrency if you only git it --shaders alone, so it might be worth doing that and setting max allocation to 100%.

[dellech]

The latest git version will limit the size of the thread concurrency if you only git it --shaders alone, so it might be worth doing that and setting max allocation to 100%.

and testing lower than maximum TC is worth checking out

I found that my best hash rate came with max allocation 80 and -g 1 on a 5850 ... cgminer sets TC 5760 instead of 7200

Now I am running with max allocation 100, --thread-concurrency 5760 -g1 and my rate is 277 Kh/s (tc 7200 gives 257 Kh/s)
p2pool's rate estimate confirms the reported speed, so I think that I found my optimum

btw my earlier report of good hash rate with max allocation 40 / 50 was erroneous: 2 GPU Threads with TC 2880 produced many invalid shares reported by p2pool but they were counted as accepted shares in cgminer
(lowering intensity eliminates the invalid shares but reduces hash rate)

time to switch my other machines to LTC mining (cards 5870, 6790 and 2 different AMD APUs to optimize *lol*)

[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.

pretty sure it locks the CPU usage to one core.  99% sure.

That at least makes sense for "export GPU_USE_SYNC_OBJECTS=1". But what about "export GPU_USE_SYNC_OBJECTS=0"?

[-ck]

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.

pretty sure it locks the CPU usage to one core.  99% sure.

That at least makes sense for "export GPU_USE_SYNC_OBJECTS=1". But what about "export GPU_USE_SYNC_OBJECTS=0"?

It does not lock it to a cpu. It affects internal function of the amd driver, but what exactly, I don't know. As for "GPU_USE_SYNC_OBJECTS=0" that was actually a typo I meant to write 1! I doubt it does anything with scrypt mining.

[Tittiez]

win32: http://www.mediafire.com/?0yxa1cf35pk5q2i

Latest Commits included!

[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.

pretty sure it locks the CPU usage to one core.  99% sure.

That at least makes sense for "export GPU_USE_SYNC_OBJECTS=1". But what about "export GPU_USE_SYNC_OBJECTS=0"?

It does not lock it to a cpu. It affects internal function of the amd driver, but what exactly, I don't know. As for "GPU_USE_SYNC_OBJECTS=0" that was actually a typo I meant to write 1! I doubt it does anything with scrypt mining.

lol, thanks for the clarification!

[tacotime]

I may code a python script sometime at the end of next week that calculates profitability with both litecoin and bitcoin and then hops between mining them based on that... is anyone interested in that?

[dostortugas]

As said before: You need to find the setting for your card means "ALL OF IT" the combination is the key, also the ratio of engine to ram clocks is important. For example I get no more than 230 KH/s if I underclock ram but above 400 KH/s with standard clocks (my card is already OCed makes me wonder what happens when I go to reference clocks).

[-ck]

I may code a python script sometime at the end of next week that calculates profitability with both litecoin and bitcoin and then hops between mining them based on that... is anyone interested in that?

Hopping between them would require a complete restart of cgminer at the moment.

Also:
http://allchains.info/calc.html

[NASDAQEnema]

I may code a python script sometime at the end of next week that calculates profitability with both litecoin and bitcoin and then hops between mining them based on that... is anyone interested in that?

LOL AWESOME
Was just contemplating that:
https://bitcointalk.org/index.php?topic=95987.0

[dishwara]

I may code a python script sometime at the end of next week that calculates profitability with both litecoin and bitcoin and then hops between mining them based on that... is anyone interested in that?

LOL AWESOME
Was just contemplating that:
https://bitcointalk.org/index.php?topic=95987.0

Coinotron pool have this feature.
Add worker & select Auto instead of BTC or LTC

[pginvest]

I've tried to set up cgminer for ltc but i can't get it to work  can you please help me? I don't know what i'm doing wrong
I have a laptop Asus M50VM, Duo P8600 @ 2.4 GHz, 4 GB Ram and nvidia GeForce 9600M GS 1GB - Windows Vista 32 bits

using this command: cgminer --scrypt --lookup-gap 2 --thread-concurrency 6144 -g 4 -I 13
then: url = litecoinpool.org:9332
user:
password
here i'm using my worker user and pass.
After a few minutes i got this error: http://imageshack.us/photo/my-images/39/cgminererror.jpg/

and this one (the same i got when trying to get reaper to work):
http://imageshack.us/photo/my-images/33/reaper2c.jpg/

i've updated my graphic drivers to the latest version (296.10)
Can i have your help to set it up and if its not asking too much, what the optimization code i can use for my gpu.
Thanks

[rav3n_pl]

win32: http://www.mediafire.com/?0yxa1cf35pk5q2i

Latest Commits included!

Can you please complie it w/enabled CPU mining?

[kano]

win32: http://www.mediafire.com/?0yxa1cf35pk5q2i

Latest Commits included!

Can you please complie it w/enabled CPU mining?

Please do not ...

[rav3n_pl]

win32: http://www.mediafire.com/?0yxa1cf35pk5q2i

Latest Commits included!

Can you please complie it w/enabled CPU mining?

Please do not ...

Uh? Why? I`m using 2 miners now, I found cgminer better than diablo on this 5450
--shaders 80 --verctors 4 --worksize 64 --intesity 9 gives me almost 15kH and it is not laggy at all
I just want add 3 CPU threads to it.

[kano]

People distributing CPU miners should be shot - they are used mostly by botnets

Every so often someone comes into the #cgminer IRC channel and asks about help with CPU mining.
They always fall into one of the following categories:
1) Want to run a botnet
2) Want to use other peoples computers to pay for electricity
3) Want to use work computers to pay for electricity
They always make up some story about it but in the end they are one of the 3 above
i.e. I say no support - bye bye

CPU mining is a loss - on BTC and LTC
It will cost you more in electricity to CPU mine than you will get back.

Don't do it.

[abbeytim]

tell that to pooler

[rav3n_pl]

People distributing CPU miners should be shot - they are used mostly by botnets

Every so often someone comes into the #cgminer IRC channel and asks about help with CPU mining.
They always fall into one of the following categories:
1) Want to run a botnet
2) Want to use other peoples computers to pay for electricity
3) Want to use work computers to pay for electricity
They always make up some story about it but in the end they are one of the 3 above
i.e. I say no support - bye bye

CPU mining is a loss - on BTC and LTC
It will cost you more in electricity to CPU mine than you will get back.

Don't do it.

Yep, you got me. My 10000 botnet gov machines just waitin for software update. 25kh*10000? ;]
*googling for mingw for dummies*

[markm]

Electricity might be an expensive currency to use to purchase coins with, but it is locally exchange-able without trusting anonymous or pseudonymous strangers on the net, by dealing with a big brother who already does know who you are and where you live but maybe need not know in addition that you engage in cryptocoin use.

Also, which exchanges sell pristine virgin coins, and at how much more cost than used coins?

Finally, if you think the coins will never be worth the electricity paid for them, you have a pretty pessimistic outlook, why bother at all if the damn things will never be worth that much?

-MarkM-