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Processes work in either userspace US, or system (kernel space)SY. Actually I believe
kernel spaces is only device driver calls and other kernel processes. NI referces to
niceness. There are commands nice and renice which can change the base priority of a
process. I.e. a nice process runs at a lower priority. ID is idle, WA is wait state,
waiting for some physical device RAM, harddrive, etc. Not sure about the HI and SI
Yes, you're correct. By default on a multiprocessor system, if you just run top straight up, it's supposed to be the total of all four.
Check the man pages for your distro if you want to see less generic numbers, even with the 106% cpus. You just need to pass the flag so that top will show what cpu the process is running on and it should be under or equal to 100%
In the original post, you see one number in red that is obviously the average of contributions from four cores and one number in red that is obviously the sum of contributions from four cores.
I look at a lot of different performance data from top and other tools. Usually it is just a minor annoyance that I can't remember which numbers represent average of cores vs. sum of cores. Sometimes it leads to real confusion.