100 % cpu bug on Slush's pool

[Idzy]

Hows this for weird behavior:

Using Guiminer on Win 7 64 on 3 different machines, using 11.12 and sdk 2.5 and opencl flags in gui miner are -v -f 90 -w 128

When I mine on Slush's pool I get the 100% cpu bug uses one core full time on my fx8120 and the same on my dual core athalons for the other 2 machines

If I switch to btcGuild no cpu bug same settings.

Any ideas?

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[MrTeal]

I'm guessing that it's just continually trying to reconnect. See the slush pool thread, but the pool is down.

[Idzy]

No the 100% bug has been affecting me for a couple weeks on all my machines they were all not having the problem then one morning I checked them and they were hashing in the kh/s range until I enabled more core afinity on them.

I just noticed that it doesn't affect me when I connect to btc guild because of the problems with slush's pool tonight before that I hadn't tried another pool.

[ssateneth]

in the kilohash range indicates you were cpu mining. your settings must be wrong, double check you're mining on gpu and not cpu.

[Idzy]

no I was not cpu mining but when I am connected to slush if I don't check off all the cpu affinity checkboxes then it drops into the kh/s range mining on my GPUs on my 8120 I check off all 8 because it seems to randomly choose a core to use and if they are not all checked it drops down to the kilohash range if it doesn't have the one it picks available

[Idzy]

Heres some screen shots of this in action:

Mining on slush with all cpus selected works ok uses 100% of a core
http://imageshack.us/photo/my-images/19/btc1.jpg/


With all cpus unselected kilohash range mining on my 6870
http://imageshack.us/photo/my-images/836/btc2.jpg/


Mining on Btcguild all cpus selected almost no cpu usage
http://imageshack.us/photo/my-images/171/btc3k.jpg/

Mining on Btcguild no cpus selected almost no cpu usage no problems
http://imageshack.us/photo/my-images/580/btc4.jpg/

[eleuthria]

BTC Guild is just that cool!

That's a very interesting find...I can't imagine what's going on that would make the bug appear based on the specific pool you're pointed at.  Have you tested any others?

[Idzy]

No CPU bug on Eligius or Deepbit either

[Idzy]

It started sometime overnight between the 16th and 17th of March, I know this because I built the 8120 System on the friday evening and it was working fine with no cpu bug when I went to bed, in the morning all my Miners were doing the kilohash thing till I checked off all the cores.

Im in the GMT -6 time zone.

[slush]

(repost from pool thread)

This is very interesting, but some other people come from other pools to my pool exactly because they have no 100% cpu bug with me :-). I mean - there's probably some strange issue inside guiminer which can be triggered by something like faster/slower responses etc (I mean some strange race condition or so). I didn't changed mining part since March 16 and I even cannot imagine how can I affect this bug by any change inside the pool...

[DeathAndTaxes]

Wouldn't the simplest solution be to drop GUI Miner and use a real one?

[conspirosphere.tk]

I am mining on slush with a 3 cards rig + a 2 cards rig with no issues using aoclbf (so phoenix) with no issues at all in 2 months.

[Idzy]

Wouldn't the simplest solution be to drop GUI Miner and use a real one?

Do you have any suggestions on what a real one might be.  From my understanding guiminer is just a front end for the real miners.  And No I'm not going to be switching to linux anytime soon since I use my PCs for more than just mining.

[DeathAndTaxes]

cgminer.  (yes that is a period)

[Idzy]

cgminer does seem to be fixing the cpu bug.