poclbm using CPU 100% even though using GPU?

[Wepp]

Guys...
Just set the CPU affinity...

This question gets asked a lot. Here's how to alleviate it: http://forum.bitcoin.org/index.php?topic=12292.0

[kiwiasian]

Guys...
Just set the CPU affinity...

This question gets asked a lot. Here's how to alleviate it: http://forum.bitcoin.org/index.php?topic=12292.0

Yes, that's what I was saying. I know how to do it...

[ThuggyWuggy]

I got mine to work after having this problem...maybe this will work for you guys as well. Start computer with main graphics card plugged in AND secondary graphics card plugged in. Launch miner with device set to 0, then unplug primary graphics card from monitor, switch to secondary graphics card, then run again with device set to 0. For me, it starts out with one of them using 25% CPU then it drops back down to 0% after I launch the second miner... I have no idea why this works, but this is how I fixed the problem.

[warsmith]

I am running a W7 rig with 6950x2 and I'm getting the same problem. Either it's GUIMiner's poclbm sucking 100% of CPU (divided equally between all instances) or a single instance of Java.exe for 100% CPU when using DiabloMiner.

Currently, I am using DiabloMiner, because there's only one process (java.exe) for me to set the affinity to a single core, instead of multiple instances of GUIMiner's, and I guess that's the only viable solution for now - trading off 25% for saving 75% on a quad-core CPU. :/

[allinvain]

It's the OpenCL drivers! NOT any miner application..

Please all e-mail AMD to fix it

[tonto]

hey just adding that I'm also experiencing full CPU usage.  I'm using guiminer with CPU affinity *off*.  I have my aggression right now set at 9.  My poor fans are going full bore
 
Win7 64bit.  2 HD5770s.
 
Anxiously awaiting someone to figure out something

[allinvain]

Easy way to alleviate the problem, not solve it. Set an affinity for each instance of poclbm.exe you find in task manager.

[allinvain]

Easy way to alleviate the problem, not solve it. Set an affinity for each instance of poclbm.exe you find in task manager.

Or build your mining machines with single core 15W tdp processors. 

Or get AMD to fix this issue lol

[pennytrader]

seems always related to 2+ video cards?

[Xenomorph]

It's the OpenCL drivers! NOT any miner application..

Please all e-mail AMD to fix it

This happens on NVidia cards as well (GeForce GT 330M). I don't think AMD is the cause.

[magg0t]

Hardware:
Via C7 1800Mhz http://www.biostar.com.tw/app/en/mb/content.php?S_ID=470
2GB RAM
ATI 4650 / 5850

Software:
Debian Squeeze ( ATI 10.9)
m0mchil's miner
SDK 2.2

I startet building this miner yesterday with the 4650. Didn't notice the high CPU-load until I hit htop, but the machine was still easily operated.

Then I borrowed a 5850 from a friend. CPU-load is still 100%, but now the commandline is getting a little sluggish.

I wouldn't bother about it, because this machine is a dedicated miner, but I think it would save some energy to get the CPU-load down...

[walidzohair]

I tested with dual 6970 and 6950 and both use full CPU .. AMD x250. so I downgraded teh processor poer to 800 mhz instead of 3200mhz. not using affinity as it sometimes hangs.


I guess it is related to AMD. And using ufasoft to mine using the CPU is yet not a good solution.


I am getting around 400 Mh/s from 6970, 350 mh/s from new 6950 with single fan . and 320 mh/s from old 6950 with dual fan.


not much of a problem here with low power prices but yet annoying!

[iopq]

It's the OpenCL drivers! NOT any miner application..

Please all e-mail AMD to fix it

but what about the people who have nvidia who have this issue?

[Bitcoin_Silver_Supply]

Guys...
Just set the CPU affinity...

That is a bandaid but not a fix. For a two core CPU having one running 100% 24/7 is quite a load on both power and resources.

The only solution at the moment seems to be switching to Linux, but that is either undesirable or impossible for many without dedicated rigs.

[GenTarkin]

I have this issue as well =( its very annoying. I have tried all sorts of different miners w/ my new 6950 and it still has the one core usage on my single card!

I have tried the preview 11.7 drivers which are said to fix this issue. Is it possible to individually try different OpenCL packages w/ different driver versions till find one that does not have this issue? E.G. use the 10.x drivers OpenCL (which is said to work correctly) w/ newer drivers?

[TurboK]

On my end, I never had this problem, until I upgraded to Catalyst 11.7. Now I have one core maxed out nonstop in Guiminer - using any kernel, poclbm, phatk, phoenix, anything. Aside from the power drain, it also hits the performance (so it's not just burning idle threads, but it's stuck in an infinite loop).

[Bitcoin_Silver_Supply]

It's a bitch alright. It would be nice if switching to Linux full time wasn't the only solution.

[Bitcoin_Silver_Supply]

Not a bad idea. If we all threw a quarter/half BTC in that could probably amount to a nice sum.

[n4l3hp]

Windows XP 64-bit / 11.6 and 2.5 / -f 10

Motherboard is a Gigabyte 890GPA-UD3H and I use the IGP as the primary display so I can game or watch videos without problems. Tried -f0 with both cards but the IGP seems to be affected, mouse lags and jumps sometimes when moving the pointer across the screen.

I haven't encountered this 100% cpu utilization problem you guys are talking about even with 11.2 and 11.4 and previous versions of poclbm.

[Transisto]

You got XP!,,, ohhh let me try.