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Message boards : Number crunching : cudaPPSsieve 1.42 high CPU usage

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_heinz
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Joined: 9 Dec 10
Posts: 70
ID: 76278
Credit: 450,445,875
RAC: 509,330
PPS LLR Ruby: Earned 2,000,000 credits (3,534,535)SR5 LLR Gold: Earned 500,000 credits (637,227)SGS LLR Amethyst: Earned 1,000,000 credits (1,456,361)Cullen/Woodall Sieve (suspended) Gold: Earned 500,000 credits (986,437)PPS Sieve Double Silver: Earned 200,000,000 credits (433,673,269)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Silver: Earned 100,000 credits (303,121)TRP Sieve (suspended) Turquoise: Earned 5,000,000 credits (6,076,908)GFN Ruby: Earned 2,000,000 credits (3,796,257)
Message 149582 - Posted: 21 Mar 2021 | 16:26:28 UTC

I run 1.42 (cudaPPSsieve) on my 3 Titans, but the app takes all my CPU cycles of 8 Cores of the XEON, it shows CPU usage=100%.
I let run 4 at once per GPU, so I got 95-98% usage of the GPU's.
The high usage of CPU=100% is not normal. With the old app 1.39 cudaPPSsieve I had never seen such values.
Please can you take a look at my machine V8-Xeon
V8-Xeon_results
What must I do to reduce CPU-Usage to max 20%

my app_config looks like this:
------------------------------
<app_config>
<app>
<name>pps_sr2sieve</name>
<fraction_done_exact/>
<max_concurrent>50</max_concurrent>
<plan_class>cudaPPSsieve</plan_class>
<gpu_versions>
<gpu_usage>0.25</gpu_usage>
<cpu_usage>0.04</cpu_usage>
</gpu_versions>
</app>
</app_config>
----------------------------------------------------
here you see usage, temps and all other important values
V8Xeon_working
-----------------------------------------------------
thanks _heinz

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Message boards : Number crunching : cudaPPSsieve 1.42 high CPU usage

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