cpuhotplug from ubuntu_ltp failed for cpuhotplug02 cpuhotplug03 cpuhotplug04 cpuhotplug06

cpuhotplug02:

    Name: cpuhotplug02
    Date: Tue Mar 30 13:32:56 UTC 2021
    Desc: What happens to a process when its CPU is offlined?

    CPU is 1
    sh: echo: I/O error
    cpuhotplug02 1 TFAIL: process did not change from CPU 1
    tag=cpuhotplug02 stime=1617111176 dur=5 exit=exited stat=1 core=no cu=2 cs=2
    startup='Tue Mar 30 13:33:06 2021'

cpuhotplug03:

    Name: cpuhotplug03
    Date: Tue Mar 30 13:33:06 UTC 2021
    Desc: Do tasks get scheduled to a newly on-lined CPU?

    CPU is 1
    sh: echo: I/O error
    cpuhotplug03 1 TBROK: CPU1 cannot be offlined
    USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
    root 20613 0.0 0.0 4636 864 ? R 13:33 0:00 /bin/sh /opt/ltp/testcases/bin/cpuhotplug_do_spin_loop
    root 20614 0.0 0.0 4636 812 ? R 13:33 0:00 /bin/sh /opt/ltp/testcases/bin/cpuhotplug_do_spin_loop
    root 20615 0.0 0.0 4636 812 ? R 13:33 0:00 /bin/sh /opt/ltp/testcases/bin/cpuhotplug_do_spin_loop
    root 20616 0.0 0.0 4636 880 ? R 13:33 0:00 /bin/sh /opt/ltp/testcases/bin/cpuhotplug_do_spin_loop
    root 20620 0.0 0.0 14864 1092 ? S 13:33 0:00 grep cpuhotplug_do_spin_loop
    cpuhotplug03 1 TINFO: Onlining CPU 1
    1 /bin/sh /opt/ltp/testcases/bin/cpuhotplug_do_spin_loop
    1 /bin/sh /opt/ltp/testcases/bin/cpuhotplug_do_spin_loop
    0 /bin/sh /opt/ltp/testcases/bin/cpuhotplug_do_spin_loop
    0 /bin/sh /opt/ltp/testcases/bin/cpuhotplug_do_spin_loop
    cpuhotplug03 1 TPASS: 2 cpuhotplug_do_spin_loop processes found on CPU1
    tag=cpuhotplug03 stime=1617111186 dur=2 exit=exited stat=2 core=no cu=242 cs=38
    startup='Tue Mar 30 13:33:08 2021'

cpuhotplug04:

    Name: cpuhotplug04
    Date: Tue Mar 30 13:33:08 UTC 2021
    Desc: Does it prevent us from offlining the last CPU?

    sh: echo: I/O error
    cpuhotplug04 1 TFAIL: Could not offline cpu1
    tag=cpuhotplug04 stime=1617111188 dur=0 exit=exited stat=1 core=no cu=4 cs=4
    startup='Tue Mar 30 13:33:08 2021'

cpuhotplug06

    Name: cpuhotplug06
    Date: Tue Mar 30 13:33:08 UTC 2021
    Desc: Does top work properly when CPU hotplug events occur?

    CPU is 1
    sh: echo: I/O error
    cpuhotplug06 1 TBROK: CPU1 cannot be offlined
    20913 ? 00:00:00 top
    tag=cpuhotplug06 stime=1617111188 dur=1 exit=exited stat=2 core=no cu=2 cs=3
    startup='Tue Mar 30 13:33:15 2021'

http://10.246.72.46/4.15.0-1112.125-azure/bionic-linux-azure-4.15-azure-amd64-4.15.0-Basic_A2-ubuntu_ltp/ubuntu_ltp/results/ubuntu_ltp.cpuhotplug/debug/ubuntu_ltp.cpuhotplug.DEBUG.html