CPU usage peak after RkLunch.sh

• nulon443

  Posts: 2

  Joined: 2026-04-04 15:45

  2026-04-04 16:23

  Hi,
  
  I am using pico ultra w with buildroot. After boot CPU usage is around 7%.
  
  top - 00:18:07 up 21 min, 1 user, load average: 10.19, 9.97, 7.55
  Tasks: 93 total, 1 running, 92 sleeping, 0 stopped, 0 zombie
  %Cpu0 : 2.9/2.9 6[|||| ]
  GiB Mem : 20.6/0.2 [ ]
  GiB Swap: 0.0/0.0 [ ]
  
  PID USER PR NI VIRT RES %CPU %MEM TIME+ S COMMAND
  473 root 20 0 74.5m 13.1m 7.2 7.6 1:31.48 S rkipc -a /oem/usr/share/iqfiles
  262 root -91 0 0.0m 0.0m 2.6 0.0 0:32.02 S [vcodec_thread_0]
  3870 root 20 0 3.1m 1.2m 2.0 0.7 0:00.34 R top
  259 root -96 0 0.0m 0.0m 0.7 0.0 0:08.72 S [queue_work0]
  276 root 20 0 0.0m 0.0m 0.7 0.0 0:01.22 D [rkisp-vir0]
  5 root 20 0 0.0m 0.0m 0.0 0.0 0:00.02 I [kworker/u2:0-events_unbound]
  1 root 20 0 1.6m 0.8m 0.0 0.5 0:00.56 S init
  2 root 20 0 0.0m 0.0m 0.0 0.0 0:00.00 S [kthreadd]
  
  
  when I execute RkLunch-stop.sh - it drops to 4-5, or stays the same (7%).
  
  top - 00:19:13 up 22 min, 2 users, load average: 10.06, 9.97, 7.72
  Tasks: 94 total, 1 running, 93 sleeping, 0 stopped, 0 zombie
  %Cpu0 : 2.6/1.3 4[|| ]
  GiB Mem : 16.8/0.2 [ ]
  GiB Swap: 0.0/0.0 [ ]
  
  PID USER PR NI VIRT RES %CPU %MEM TIME+ S COMMAND
  488 root 20 0 3.1m 1.3m 1.3 0.7 0:00.14 R top
  1 root 20 0 1.6m 0.8m 0.0 0.5 0:00.56 S init
  2 root 20 0 0.0m 0.0m 0.0 0.0 0:00.00 S [kthreadd]
  5 root 20 0 0.0m 0.0m 0.0 0.0 0:00.03 I [kworker/u2:0-events_unbound]
  7 root 20 0 0.0m 0.0m 0.0 0.0 0:00.76 S [ksoftirqd/0]
  8 root 20 0 0.0m 0.0m 0.0 0.0 0:00.00 S [kdevtmpfs]
  9 root 20 0 0.0m 0.0m 0.0 0.0 0:00.00 S [oom_reaper]
  6 root 0 -20 0.0m 0.0m 0.0 0.0 0:00.00 I [mm_percpu_wq]
  
  Then after around 20s I run RkLunch.sh. And in most majority of time I am getting CPU usage around 30%
  
  top - 00:20:33 up 23 min, 2 users, load average: 10.39, 10.08, 7.94
  Tasks: 97 total, 1 running, 96 sleeping, 0 stopped, 0 zombie
  %Cpu0 : 23.8/4.2 28[||||||||||||||| ]
  GiB Mem : 21.0/0.2 [ ]
  GiB Swap: 0.0/0.0 [ ]
  
  PID USER PR NI VIRT RES %CPU %MEM TIME+ S COMMAND
  929 root 20 0 74.5m 12.7m 7.2 7.4 0:02.58 S rkipc -a /oem/usr/share/iqfiles
  262 root -91 0 0.0m 0.0m 2.6 0.0 0:34.18 S [vcodec_thread_0]
  1146 root 20 0 3.1m 1.2m 2.0 0.7 0:00.36 R top
  259 root -96 0 0.0m 0.0m 1.3 0.0 0:09.28 S [queue_work0]
  3923 root 20 0 0.0m 0.0m 0.7 0.0 0:00.04 I [kworker/0:0-events_freezable]
  1 root 20 0 1.6m 0.8m 0.0 0.5 0:00.56 S init
  5 root 20 0 0.0m 0.0m 0.0 0.0 0:00.03 I [kworker/u2:0-events_unbound]
  10 root 0 -20 0.0m 0.0m 0.0 0.0 0:00.00 I [writeback]
  
  Why is it happening? Is there any explanation?
  
  Maybe I should use pkill to stop rkipc and start it manually, not via RkLunch.sh script?

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