Why command execution takes more time than usual ?

Issue

• Commands usually taking almost no time take several seconds to complete

  # time free
                total        used        free      shared  buff/cache   available
  Mem:       32775252      819592    30595968       22844     1359692    31625924
  Swap:      50331644      510672    49820972
  
  real    0m9.505s
  user    0m0.000s
  sys     0m0.008s
  

• McAfee hipus process consumes all the available CPUs

  # top | head 
  top - 15:04:07 up 18 days, 10:35,  2 users,  load average: 6.88, 5.78, 4.88
  Tasks: 329 total,   1 running, 327 sleeping,   0 stopped,   1 zombie
  %Cpu(s):  2.5 us,  3.9 sy,  0.0 ni, 93.3 id,  0.2 wa,  0.0 hi,  0.1 si,  0.0 st
  KiB Mem : 32775252 total, 31484164 free,   686148 used,   604940 buff/cache
  KiB Swap: 50331644 total, 49653200 free,   678444 used. 31799028 avail Mem 
  
    PID USER      PR  NI    VIRT    RES    SHR S  %CPU %MEM     TIME+ COMMAND
   1108 root      20   0  212408   4524    312 S 400.0  0.0  12321:01 hipus
  47555 root      20   0   42716   1976   1288 R   0.4  0.0   0:00.03 top
     73 root      20   0       0      0      0 S   0.2  0.0  89:48.43 rcu_sched