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Title: small gpu load (poclbm.py, 3x6950 under ubuntu 11.04) Post by: Laminator on June 03, 2011, 01:31:17 PM Hi
I have a problem with gpu load under ubuntu 11.04 with catalyst 11.5 and ati stream 2.3 The problem is when I start mining with first gpu I got ~350 mh/s and around 95% gpu load But when I start second and third gpus I've got this: Code: Adapter 0 - AMD Radeon HD 6900 Series Can anyone help me? Title: Re: small gpu load (poclbm.py, 3x6950 under ubuntu 11.04) Post by: colorprint on June 03, 2011, 08:07:48 PM I have a similar problem with radeon 6990 card... it has 2 GPUs...
With mining with 1 GPU I get 99% GPU load and 400MH/s. With both GPUs load is 80% and total 620-660MH/s Title: Re: small gpu load (poclbm.py, 3x6950 under ubuntu 11.04) Post by: dc_lose on June 04, 2011, 12:33:20 PM i have the same problem! 10 btc if you help me to solve it
Title: Re: small gpu load (poclbm.py, 3x6950 under ubuntu 11.04) Post by: Meatball on June 04, 2011, 12:36:23 PM Do you have enough power on your PSU for the three cards? You probably need at minimum a 750W or so to handle that, preferably with a single rail or you'll overload the rails. I've seen GPU's throttle if they aren't getting enough power.
Title: Re: small gpu load (poclbm.py, 3x6950 under ubuntu 11.04) Post by: Laminator on June 04, 2011, 12:42:44 PM Do you have enough power on your PSU for the three cards? You probably need at minimum a 750W or so to handle that, preferably with a single rail or you'll overload the rails. I've seen GPU's throttle if they aren't getting enough power. I have 1200W PSU and everything works fine in win7Title: Re: small gpu load (poclbm.py, 3x6950 under ubuntu 11.04) Post by: dc_lose on June 04, 2011, 12:46:31 PM Do you have enough power on your PSU for the three cards? You probably need at minimum a 750W or so to handle that, preferably with a single rail or you'll overload the rails. I've seen GPU's throttle if they aren't getting enough power. I have 1200W PSU and everything works fine in win7Title: Re: small gpu load (poclbm.py, 3x6950 under ubuntu 11.04) Post by: dc_lose on June 04, 2011, 12:49:10 PM What are your miner command line settings? Also, is your power supply large enough? If possible, try downclocking the memory to 300 MHz, that might lift some strain on the PSU. miner settings -v -w128 How to downcloack the memory in ubuntu 1104? Title: Re: small gpu load (poclbm.py, 3x6950 under ubuntu 11.04) Post by: Inaba on June 04, 2011, 01:23:34 PM Do you have the crossfire bridges connected? If so, disconnect.
Have you disabled CF with aticonfig? If not, aticonfig --crossfire=off Title: Re: small gpu load (poclbm.py, 3x6950 under ubuntu 11.04) Post by: Laminator on June 04, 2011, 01:43:40 PM Do you have the crossfire bridges connected? If so, disconnect. Have you disabled CF with aticonfig? If not, aticonfig --crossfire=off CF is disabled bridges are disconnected Title: Re: small gpu load (poclbm.py, 3x6950 under ubuntu 11.04) Post by: fasti on June 04, 2011, 01:49:07 PM I had this problem with my 2x 6950, I majorly fixed by you just leaving it alone. Unplug screen or log off or something.
Setting the miner very aggressive (-f 0) for secondary cards will fix it slightly also. It doesn't bother desktop responsiviness, only settings on the primary card effects it. Stacking up more miners per GPU also should make it use the GPU more, but I didn't need to do it. So if it's headless computer, this should fix it. If problem is CPU related with multiple cards, this might help: "export GPU_USE_SYNC_OBJECTS=1" in terminal. Title: Re: small gpu load (poclbm.py, 3x6950 under ubuntu 11.04) Post by: fasti on June 04, 2011, 02:03:28 PM Ye using AMDOverdriveCtrl aswell. 880core 760memory(same temps as ~300-400, left it high for more stableness perhaps)
For multiple instances of the software for each GPU you need to start it with "-i = number" flag. You can get the info from "AMDOverdriveCtrl -h". For me the first card was "0", second "6". I run it with: -v -w 64 -f 10(primary)/0(secondary) Title: Re: small gpu load (poclbm.py, 3x6950 under ubuntu 11.04) Post by: dc_lose on June 04, 2011, 04:32:38 PM What are your miner command line settings? Also, is your power supply large enough? If possible, try downclocking the memory to 300 MHz, that might lift some strain on the PSU. miner settings -v -w128 How to downcloack the memory in ubuntu 1104? Looks like your cards are highly restricted in over/underclocking range, aticonfig won't do. AMDOverdriveCtrl, on the other hand, might just do that. Get it here: http://sourceforge.net/projects/amdovdrvctrl/files/C%2B%2B%20sources/AMDOverdriveCtrl.1.2.0.tar.bz2/download If you don't run headless, just start it and adjust the values. If you do, post, and I'll be back ;) with 3 x 6970 Title: Re: small gpu load (poclbm.py, 3x6950 under ubuntu 11.04) Post by: Atroxes on June 04, 2011, 04:36:46 PM Didn't the Hardware Mining comparison wiki page state that SDK's 2.2 and 2.3 had a bug causing them to hog CPU resources?
Check your CPU load while mining, and change to 2.4 if possible. Title: Re: small gpu load (poclbm.py, 3x6950 under ubuntu 11.04) Post by: dc_lose on June 04, 2011, 04:42:17 PM Didn't the Hardware Mining comparison wiki page state that SDK's 2.2 and 2.3 had a bug causing them to hog CPU resources? Ok I'll check it laterCheck your CPU load while mining, and change to 2.4 if possible. Title: Re: small gpu load (poclbm.py, 3x6950 under ubuntu 11.04) Post by: dc_lose on June 04, 2011, 05:53:49 PM CPU usage is about 50%
I'm trying to install SDK 2.4 Code: wget http://download2-developer.amd.com/amd/APPSDK/AMD-APP-SDK-v2.4-lnx64.tgz Code: /poclbm$ ./poclbm.py What am I doing wrong? Title: Re: small gpu load (poclbm.py, 3x6950 under ubuntu 11.04) Post by: fasti on June 04, 2011, 05:59:32 PM http://forum.bitcoin.org/index.php?topic=7514.msg110334#msg110334
try that one for installing 2.4 Title: Re: small gpu load (poclbm.py, 3x6950 under ubuntu 11.04) Post by: mikegogulski on June 04, 2011, 06:14:09 PM This is the fix for the high CPU utilization issue (assuming you don't have something else really wacky going on):
Code: echo "export GPU_USE_SYNC_OBJECTS=1" >> ~/.bashrc Then restart your miners. Title: Re: small gpu load (poclbm.py, 3x6950 under ubuntu 11.04) Post by: dc_lose on June 04, 2011, 06:26:32 PM http://forum.bitcoin.org/index.php?topic=7514.msg110334#msg110334 thanks matetry that one for installing 2.4 I've installed SDK 2.4 but gpu usage is still ~50% :( Title: Re: small gpu load (poclbm.py, 3x6950 under ubuntu 11.04) Post by: fasti on June 04, 2011, 08:35:52 PM Did you try leaving it alone(logoff or unplugmonitor or..) and calculate from "2^32 * share/s = hash/s" from your pool site(~3hours to get most accurate). I know there's some variance, but should clearly see if they are still running 50% or 99%.
Title: Re: small gpu load (poclbm.py, 3x6950 under ubuntu 11.04) Post by: Laminator on June 04, 2011, 08:41:05 PM http://forum.bitcoin.org/index.php?topic=7514.msg110334#msg110334 thanks matetry that one for installing 2.4 I've installed SDK 2.4 but gpu usage is still ~50% :( Crap. Now try underclocking your memory to 300 MHz, maybe that helps... Did you try leaving it alone(logoff or unplugmonitor or..) and calculate from "2^32 * share/s = hash/s" from your pool site(~3hours to get most accurate). I know there's some variance, but should clearly see if they are still running 50% or 99%. yep, I've tried that, hashrate is 490mh/s instead of ~1200mh/sTitle: Re: small gpu load (poclbm.py, 3x6950 under ubuntu 11.04) Post by: dc_lose on June 04, 2011, 08:59:04 PM http://forum.bitcoin.org/index.php?topic=7514.msg110334#msg110334 thanks matetry that one for installing 2.4 I've installed SDK 2.4 but gpu usage is still ~50% :( Crap. Now try underclocking your memory to 300 MHz, maybe that helps... Did you try leaving it alone(logoff or unplugmonitor or..) and calculate from "2^32 * share/s = hash/s" from your pool site(~3hours to get most accurate). I know there's some variance, but should clearly see if they are still running 50% or 99%. and this tooAnother idea, burn a LinuxCoin cd and try mining in their live environment. If it still stays low, we'll know it's probably hardware related. ok, I will try, thankshttp://forum.bitcoin.org/?topic=7374.0 Title: Re: small gpu load (poclbm.py, 3x6950 under ubuntu 11.04) Post by: fasti on June 05, 2011, 09:02:46 AM 50% cpu.. do you have dualcore? as 50% would be 100% usage on one core, meaning you are capping out on cpu.
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