Questions and Answers : Unix/Linux : possible bug in Computing preferences -> use at most X% of CPU time.
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vince Send message Joined: 4 May 20 Posts: 8 Credit: 319,779 RAC: 0 |
I am currently having to throttle CPU usage to keep temperatures down. (I have another thread open on the temp problem and wont bore you with that). So, I have been tinkering for days with max CPU frequency at the hardware level, number of cores, percentage, etc. For reference CPU is FX8350 8 cores, 1 thread per core, 4 ghz. Since this is my work desktop, I want to try and keep the max frequency at 4ghz so I while working it's nice and responsive. A while ago I found that running 6 cores at 45% of the time was a sweet spot. Everything was at most points, and lowest overall temp. Today I found that when I specify 45%, the average CPU that it was actually using was around 6%. If I changed it to 35% then usage was a steady 35% If I changed it to 50% then usage was a steady 50% change it to 45% and it's back down to a steady 6% Very odd. Has anyone else reported this? My current workaround is to run 2 cores at full tilt. |
Grant (SSSF) Send message Joined: 28 Mar 20 Posts: 1682 Credit: 17,854,150 RAC: 18,215 |
My current workaround is to run 2 cores at full tilt.It's generally best to run less cores at full sped than to set "Use at most 100 % of CPU time" to anything other than 100% The smaller you set that percentage, the longer it will take to actually process a Task. Grant Darwin NT |
Mod.Sense Volunteer moderator Send message Joined: 22 Aug 06 Posts: 4018 Credit: 0 RAC: 0 |
I agree, seems a very odd and unexpected result. Is it possible that you found a sweet spot on a power saver setting or something? I also agree that running less CPUs at 100% is a better way to achieve the result. Helps improve your memory and L2/L3 cache utilization. Sort of helps the machine concentrate on a smaller number of things. Rosetta Moderator: Mod.Sense |
Questions and Answers :
Unix/Linux :
possible bug in Computing preferences -> use at most X% of CPU time.
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