CPU usage claims 100% but CPU temperature doesn't reflect this?

Message boards : Questions and problems : CPU usage claims 100% but CPU temperature doesn't reflect this?
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wolfman1360

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Joined: 5 Sep 17
Posts: 10
Canada
Message 91307 - Posted: 1 May 2019, 2:40:02 UTC
Last modified: 1 May 2019, 2:43:59 UTC

Hello,
I've been a cruncher at WCG for the last few years and just recently began branching out.
I'm on an AMD Ryzen 1800x with an RX 570. I've added Rosetta and Seti - Seti only for the GPU, however, but I seem to be running into some sort of issue.

My CPU claims to be at 100% usage, however it just doesn't seem to be using all of its resources. The temperatures hover right around 50-55 c when normally they go to 60 - the average is generally 61. I'm honestly not sure how to explain it sufficiently. It's like a car that's in gear, but half still in neutral with the pedal to the floor. I feel like I'm wasting electricity and not getting my crunchings worth. Am I making any sort of sense? I wouldn't make this an issue, but running prime 95 the CPU ramps right back up to its normal 60+, at least until I repaste and add better cooling, but still. The CPU tasks are all just Rosetta 4.07.


From what I'm seeing, Rosetta and / or Seti isn't spiking my ram to force me to use swap - I have 16 GB, for what it's worth.

Any help appreciated.

I'm running Windows 10 home, Boinc 7.14.2.
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mmonnin

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Joined: 1 Jul 16
Posts: 146
United States
Message 91363 - Posted: 3 May 2019, 18:07:08 UTC

This is all based off temps? Not every project uses the CPU the same so temps will be different even at the same % util. With lower temps the wattage probably dropped as well.
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Richard Haselgrove
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Joined: 5 Oct 06
Posts: 5077
United Kingdom
Message 91364 - Posted: 3 May 2019, 18:30:29 UTC - in response to Message 91363.  

You could be using 100% of a tiny integer NOP loop, and no memory, while waiting for something to happen. Or you might be using 100% of the AVX SIMD power of the floating point unit, while shovelling 64-bit floats in and out of RAM. They both show as 100%.
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Message boards : Questions and problems : CPU usage claims 100% but CPU temperature doesn't reflect this?

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