Kern: 99% from "show process top", is something wrong on VME SBC?

Hi folks,

 

I have set up two VME SBC running on Supermicro servers as geo-redundant. I notice that “Kern: 99%" on both systems all the time, e.g. 

 

Procs:  64 Int: 2  CPUs: 2 Mem:  1874M Swap:   0M  Kern: 99%  CPU:  5% IO:  0%
-------------------------------------------------------------------------------
  PID  Process Name      CPU %  Memory  Resident  Locked  Threads   Files
-------------------------------------------------------------------------------
 1990  usbc               1.9%   2030M      467M      0K      163     454
 1989  manager            0.4%     78M       20M      0K       12      17
 2273  kworker/u:4        0.2%      0K        0K      0K        1       0
  990  kworker/u:3        0.2%      0K        0K      0K        1       0
  738  kworker/1:1        0.2%      0K        0K      0K        1       0
   12  kworker/u:1        0.2%      0K        0K      0K        1       0
   10  kworker/0:1        0.2%      0K        0K      0K        1       0
    5  kworker/u:0        0.2%      0K        0K      0K        1       0
 2085  kjournald          0.0%      0K        0K      0K        1       0
 2081  kjournald          0.0%      0K        0K      0K        1       0
 1992  media              0.0%     80M       15M      0K       14      14
 1977  monitor            0.0%     78M       14M      0K       11      14