Folding speed decreases

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Re: Folding speed decreases

Postby bruce » Thu May 05, 2011 7:05 pm

No, nothing is wrong. The default behavior is to use a full CPU doing spin-waits to maximize the responsiveness of the GPU at the expense of CPU time. That's why you have to optimize the ATI Environment Variables.
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Re: Folding speed decreases

Postby MtM » Thu May 05, 2011 7:12 pm

Edit:

bruce wrote:No, nothing is wrong. The default behavior is to use a full CPU doing spin-waits to maximize the responsiveness of the GPU at the expense of CPU time. That's why you have to optimize the ATI Environment Variables.


I said something is wrong when he said he's seeing only 7% cpu usage from the gpu client, not that something is wrong with my core getting saturated by the gpu client.

viewtopic.php?p=94584#p94584

Only his brook-yield 2 could be a significant issue here ( as it will yield cpu to any other process as you just said ).

I had a flush interval in the same range as his once it seemed ok, but in the thread much lower values are recommended at times.
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Re: Folding speed decreases

Postby ultimatebuster » Wed May 25, 2011 8:45 pm

There was no other process. At night everything was shutdown except for F@H and windows services.
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Re: Folding speed decreases

Postby bruce » Wed May 25, 2011 9:13 pm

Windows services are other processes.

Virus scans take time. Screensavers take time. Indexing takes time. Windowsupdate checks on-line and may download bug fixes. etc. etc. Many non-widows add-ons also wake up periodically to check for updates or whatever they want to do.

You may have turned some of these off, but very few people know exactly what each process does and whether they need it or not and what it costs to run each of them.

Generally they don't add up to a lot (except for things like chkdisk or scandisk or virus-scan or cleanmgr or defrag or other things that read every file on disk which you probably have scheduled periodically).

I'm not saying this is necessarily the issue, but it might be.
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Re: Folding speed decreases

Postby Grandpa_01 » Thu May 26, 2011 1:23 am

The 8% to 10% per core is about right for a FahCore_11 using the variables listed at least it is for my 3870X2, 3850 and my 4870X2. My 5870 running core 16 will use 1 full core of the CPU.
Image
2 - SM H8QGi-F AMD 6xxx=112 cores @ 3.2 & 3.9Ghz
5 - SM X9QRI-f+ Intel 4650 = 320 cores @ 3.15Ghz
2 - I7 980X 4.4Ghz 2-GTX680
1 - 2700k 4.4Ghz GTX680
Total = 464 cores folding
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