I noticed sometime my CPU is running above 100%, does that mean it is operating in a small black hole, how does information get back to my screen? Is Hawking radiation dangerous?
Report on system jobs using top command - MATLAB is using 121% of a cpu core.
Filed under: Computers
Where did it say 121%? I thought it was exactly 100%?
Just below where it says %CPU on first line of text.
Sorry should have highlighted it! Actually I thought it said 140% when I pressed button for screenshot.
But if you add up all the % about CPU is 100. How did it get this 121%?
100% when using “top” means 100% of 1 core. You have a multicore (or multithread in the case of HT) machine, so that 121% is spread over 2 or more cores, so no single core is operating at above 100%.
Yeah what is weird is that the job doesn’t parallelize over more cores, so it doesn’t use 200, 300 or 400 percent. Instead sometimes the job jumps to 120 or 140 for a while. Maybe this is switching the job between cores, or using 1 core to move data or between memory or write to disk/screen.