i have started a thread at amd dev forum - opencl section about the 100% cpu usage bug with >1 gpu installed. feel free to jump over there and post your support for this issue being addressed...
http://forums.amd.com/devforum/messageview.cfm?catid=390&threadid=153211&enterthread=y
Topic: dual 5850 causing nearly 100% cpu use?!?!? (Read 1713 times)
This problem is generally driver based. Try a different version of Catalyst (avoid 11.2 and 11.3) or a different version of Stream SKD and it is likely to solve the problem. You do want some CPU usage though (25% or so) to stabilize your computer in case your GFX cards try to do more than 100% occasionally. This is fairly frequent; fortunately the software most commonly used takes this potential problem into account and runs the CPU at a reasonable rate to keep everything in line.
I'm using Catalyst 11.1 and Stream SKD 2.1 and I'm using 20% CPU on my Intel i7.
I'm using Catalyst 11.1 and Stream SKD 2.1 and I'm using 20% CPU on my Intel i7.
I'm too lazy to dig up the thread, but this is apparently a driver bug. Just keep the affinity to 1 core. There is a work around here somewhere for it....
This.
I tried very hard to fix this problem on my one windows rig.
I ended up unlocking the second core of my Sempron processor so the rig would be usable as a desktop.
If you have multiple cores/processors:
1. start the miners
2. go to the task manager (ctrl+shift+esc)
3. in the processes tab right click each miner process and click "Set Affinity..."
4. put all of the miner processes on the same cpu
I'm too lazy to dig up the thread, but this is apparently a driver bug. Just keep the affinity to 1 core. There is a work around here somewhere for it....
Got the same problem, got with 2 5850s and a 6850
with 1 5850 and 1 6850 I didnt have this problem on phoenix, only on poclbm
after adding 2nd 5850 1st core has got 100% load. :/
with 1 5850 and 1 6850 I didnt have this problem on phoenix, only on poclbm
after adding 2nd 5850 1st core has got 100% load. :/
I couldn't find any specific solution for this issue, I'm using GUIMiner, and running two 5850 cards, and I'm getting nearly 100% cpu core usage on core 1, if I uncheck cpu affinity on both, then I get nearly 50% usage across all four cpu cores!
Help!
Help!
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