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[Bug 1943627] Re: Controllers test in ubuntu_ltp fails to mount on /dev/cpuctl

To: canonical-ubuntu-qa@xxxxxxxxxxxxxxxxxxx
From: Po-Hsu Lin <1943627@xxxxxxxxxxxxxxxxxx>
Date: Wed, 20 Dec 2023 01:57:25 -0000
Reply-to: Bug 1943627 <1943627@xxxxxxxxxxxxxxxxxx>
Sender: noreply@xxxxxxxxxxxxx
** Tags removed: ubuntu-ltp
** Tags added: ubuntu-ltp-controllers

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https://bugs.launchpad.net/bugs/1943627

Title:
  Controllers test in ubuntu_ltp fails to mount on /dev/cpuctl

Status in ubuntu-kernel-tests:
  New
Status in linux-gcp package in Ubuntu:
  New

Bug description:
  Found on Focal linux-gcp 5.11.0-1019.21 on g1-small instance. 
  	
  The tests are not able to mount on /dev/cpuctl which is causing cpu controller testing, latency tests, and cpuctl_test_fj to fail, seems to be only on g1-small instances. 

  This error has been observed in previous cycles and is not a new
  regression.

  20:09:23 DEBUG| [stdout] startup='Mon Sep 13 20:07:02 2021'
  20:09:23 DEBUG| [stdout] TEST 1: CPU CONTROLLER TESTING
  20:09:23 DEBUG| [stdout] RUNNING SETUP.....
  20:09:23 DEBUG| [stdout] ERROR: Could not mount cgroup filesystem on /dev/cpuctl..Exiting test
  20:09:23 DEBUG| [stdout] Cleanup called
  20:09:23 DEBUG| [stdout] cat: /dev/cpuctl/group_def/tasks: No such file or directory
  20:09:23 DEBUG| [stdout] TEST 3: CPU CONTROLLER TESTING
  20:09:23 DEBUG| [stdout] RUNNING SETUP.....
  20:09:23 DEBUG| [stdout] ERROR: Could not mount cgroup filesystem on /dev/cpuctl..Exiting test
  20:09:23 DEBUG| [stdout] Cleanup called
  20:09:23 DEBUG| [stdout] cat: /dev/cpuctl/group_def/tasks: No such file or directory
  20:09:23 DEBUG| [stdout] TEST 4: CPU CONTROLLER TESTING
  20:09:23 DEBUG| [stdout] RUNNING SETUP.....
  20:09:23 DEBUG| [stdout] ERROR: Could not mount cgroup filesystem on /dev/cpuctl..Exiting test
  20:09:23 DEBUG| [stdout] Cleanup called
  20:09:23 DEBUG| [stdout] cat: /dev/cpuctl/group_def/tasks: No such file or directory
  20:09:23 DEBUG| [stdout] TEST 5: CPU CONTROLLER TESTING
  20:09:23 DEBUG| [stdout] RUNNING SETUP.....
  20:09:23 DEBUG| [stdout] ERROR: Could not mount cgroup filesystem on /dev/cpuctl..Exiting test
  20:09:23 DEBUG| [stdout] Cleanup called
  20:09:23 DEBUG| [stdout] cat: /dev/cpuctl/group_def/tasks: No such file or directory
  20:09:23 DEBUG| [stdout] /opt/ltp/testcases/bin/run_cpuctl_stress_test.sh: line 97: /opt/ltp/output/cpuctl_results_stress-678.txt: No such file or directory
  20:09:23 DEBUG| [stdout] TEST 6: CPU CONTROLLER STRESS TESTING
  20:09:23 DEBUG| [stdout] RUNNING SETUP.....
  20:09:23 DEBUG| [stdout] ERROR: Could not mount cgroup filesystem on /dev/cpuctl..Exiting test
  20:09:23 DEBUG| [stdout] Cleanup called
  20:09:23 DEBUG| [stdout] cat: /dev/cpuctl/group_def/tasks: No such file or directory
  20:09:23 DEBUG| [stdout] TEST 7: CPU CONTROLLER STRESS TESTING
  20:09:23 DEBUG| [stdout] RUNNING SETUP.....
  20:09:23 DEBUG| [stdout] ERROR: Could not mount cgroup filesystem on /dev/cpuctl..Exiting test
  20:09:23 DEBUG| [stdout] Cleanup called
  20:09:23 DEBUG| [stdout] cat: /dev/cpuctl/group_def/tasks: No such file or directory
  20:09:23 DEBUG| [stdout] TEST 8: CPU CONTROLLER STRESS TESTING
  20:09:23 DEBUG| [stdout] RUNNING SETUP.....
  20:09:23 DEBUG| [stdout] ERROR: Could not mount cgroup filesystem on /dev/cpuctl..Exiting test
  20:09:23 DEBUG| [stdout] Cleanup called
  20:09:23 DEBUG| [stdout] cat: /dev/cpuctl/group_def/tasks: No such file or directory
  20:09:23 DEBUG| [stdout] /opt/ltp/testcases/bin/run_cpuctl_stress_test.sh: line 120: /opt/ltp/output/cpuctl_results_stress-9.txt: No such file or directory
  20:09:23 DEBUG| [stdout] TEST 9: CPU CONTROLLER STRESS TESTING
  20:09:23 DEBUG| [stdout] RUNNING SETUP.....
  20:09:23 DEBUG| [stdout] ERROR: Could not mount cgroup filesystem on /dev/cpuctl..Exiting test
  20:09:23 DEBUG| [stdout] Cleanup called
  20:09:23 DEBUG| [stdout] cat: /dev/cpuctl/group_def/tasks: No such file or directory
  20:09:23 DEBUG| [stdout] /opt/ltp/testcases/bin/run_cpuctl_stress_test.sh: line 127: /opt/ltp/output/cpuctl_results_stress-10.txt: No such file or directory
  20:09:23 DEBUG| [stdout] TEST 10: CPU CONTROLLER STRESS TESTING
  20:09:23 DEBUG| [stdout] RUNNING SETUP.....
  20:09:23 DEBUG| [stdout] ERROR: Could not mount cgroup filesystem on /dev/cpuctl..Exiting test
  20:09:23 DEBUG| [stdout] Cleanup called
  20:09:23 DEBUG| [stdout] cat: /dev/cpuctl/group_def/tasks: No such file or directory
  20:09:23 DEBUG| [stdout] TINFO Running cpuctl Latency Test 1
  20:09:23 DEBUG| [stdout] TINFO 	The latency check task started
  20:09:23 DEBUG| [stdout] FAIL 	The Latency test 1 failed
  20:09:23 DEBUG| [stdout] Max latency observed = 123838 in Iteration 0
  20:09:23 DEBUG| [stdout] The results FAIL is just intuitive and not exact failure. Please look at cpuctl_testplan.txt in the test directory.
  20:09:23 DEBUG| [stdout] Task 763103 exited abnormally with return value: 1
  20:09:23 DEBUG| [stdout] TBROK Test could'nt execute for expected duration
  20:09:23 DEBUG| [stdout] Doing cleanup
  20:09:23 DEBUG| [stdout] Cleanup done for latency test 1
  20:09:23 DEBUG| [stdout] 
  20:09:23 DEBUG| [stdout] TINFO Running cpuctl Latency Test 2
  20:09:23 DEBUG| [stdout] ERROR: Could not mount cgroup filesystem on /dev/cpuctl..Exiting test
  20:09:23 DEBUG| [stdout] Cleanup called
  20:09:23 DEBUG| [stdout] cat: /dev/cpuctl/group_def/tasks: No such file or directory
  20:09:23 DEBUG| [stdout] Doing cleanup
  20:09:23 DEBUG| [stdout] cat: '/dev/cpuctl/group*/tasks': No such file or directory
  20:09:23 DEBUG| [stdout] rmdir: failed to remove '/dev/cpuctl/group*': No such file or directory
  20:09:23 DEBUG| [stdout] umount: /dev/cpuctl: no mount point specified.
  20:09:23 DEBUG| [stdout] rmdir: failed to remove '/dev/cpuctl': No such file or directory
  20:09:23 DEBUG| [stdout] Cleanup done for latency test 2
  20:09:23 DEBUG| [stdout] 
  20:09:23 DEBUG| [stdout] mount: /dev/cpuctl: cpuctl already mounted or mount point busy.
  20:09:23 DEBUG| [stdout] cpuctl_test_fj    1  TFAIL  :  ltpapicmd.c:188: failed to mount cpu subsystem... Exiting
  20:09:23 DEBUG| [stdout] cpuctl_test_fj    1  TFAIL  :  ltpapicmd.c:188: case1    FAIL
  20:09:23 DEBUG| [stdout] mount: /dev/cpuctl: cpuctl already mounted or mount point busy.
  20:09:23 DEBUG| [stdout] cpuctl_test_fj    1  TFAIL  :  ltpapicmd.c:188: failed to mount cpu subsystem... Exiting
  20:09:23 DEBUG| [stdout] cpuctl_test_fj    1  TFAIL  :  ltpapicmd.c:188: case2    FAIL
  20:09:23 DEBUG| [stdout] mount: /dev/cpuctl: cpuctl already mounted or mount point busy.
  20:09:23 DEBUG| [stdout] cpuctl_test_fj    1  TFAIL  :  ltpapicmd.c:188: failed to mount cpu subsystem... Exiting
  20:09:23 DEBUG| [stdout] cpuctl_test_fj    1  TFAIL  :  ltpapicmd.c:188: case3    FAIL
  20:09:23 DEBUG| [stdout] mount: /dev/cpuctl: cpuctl already mounted or mount point busy.
  20:09:23 DEBUG| [stdout] cpuctl_test_fj    1  TFAIL  :  ltpapicmd.c:188: failed to mount cpu subsystem... Exiting
  20:09:23 DEBUG| [stdout] cpuctl_test_fj    1  TFAIL  :  ltpapicmd.c:188: case4    FAIL
  20:09:23 DEBUG| [stdout] mount: /dev/cpuctl: cpuctl already mounted or mount point busy.
  20:09:23 DEBUG| [stdout] cpuctl_test_fj    1  TFAIL  :  ltpapicmd.c:188: failed to mount cpu subsystem... Exiting
  20:09:23 DEBUG| [stdout] cpuctl_test_fj    1  TFAIL  :  ltpapicmd.c:188: case5    FAIL
  20:09:23 DEBUG| [stdout] mount: /dev/cpuctl: cpuctl already mounted or mount point busy.
  20:09:23 DEBUG| [stdout] cpuctl_test_fj    1  TFAIL  :  ltpapicmd.c:188: failed to mount cpu subsystem... Exiting
  20:09:23 DEBUG| [stdout] cpuctl_test_fj    1  TFAIL  :  ltpapicmd.c:188: case6    FAIL
  20:09:23 DEBUG| [stdout] mount: /dev/cpuctl: cpuctl already mounted or mount point busy.
  20:09:23 DEBUG| [stdout] cpuctl_test_fj    1  TFAIL  :  ltpapicmd.c:188: failed to mount cpu subsystem... Exiting
  20:09:23 DEBUG| [stdout] cpuctl_test_fj    1  TFAIL  :  ltpapicmd.c:188: case7    FAIL
  20:09:23 DEBUG| [stdout] mount: /dev/cpuctl: cpuctl already mounted or mount point busy.
  20:09:23 DEBUG| [stdout] cpuctl_test_fj    1  TFAIL  :  ltpapicmd.c:188: failed to mount cpu subsystem... Exiting
  20:09:23 DEBUG| [stdout] cpuctl_test_fj    1  TFAIL  :  ltpapicmd.c:188: case8    FAIL
  20:09:23 DEBUG| [stdout] mount: /dev/cpuctl: cpuctl already mounted or mount point busy.
  20:09:23 DEBUG| [stdout] cpuctl_test_fj    1  TFAIL  :  ltpapicmd.c:188: failed to mount cpu subsystem... Exiting
  20:09:23 DEBUG| [stdout] cpuctl_test_fj    1  TFAIL  :  ltpapicmd.c:188: case9    FAIL
  20:09:23 DEBUG| [stdout] mount: /dev/cpuctl: cpuctl already mounted or mount point busy.
  20:09:23 DEBUG| [stdout] cpuctl_test_fj    1  TFAIL  :  ltpapicmd.c:188: failed to mount cpu subsystem... Exiting
  20:09:23 DEBUG| [stdout] cpuctl_test_fj    1  TFAIL  :  ltpapicmd.c:188: case10    FAIL
  20:09:23 DEBUG| [stdout] mount: /dev/cpuctl: cpuctl already mounted or mount point busy.
  20:09:23 DEBUG| [stdout] cpuctl_test_fj    1  TFAIL  :  ltpapicmd.c:188: failed to mount cpu subsystem... Exiting
  20:09:23 DEBUG| [stdout] cpuctl_test_fj    1  TFAIL  :  ltpapicmd.c:188: case11    FAIL
  20:09:23 DEBUG| [stdout] mount: /dev/cpuctl: cpuctl already mounted or mount point busy.
  20:09:23 DEBUG| [stdout] cpuctl_test_fj    1  TFAIL  :  ltpapicmd.c:188: failed to mount cpu subsystem... Exiting
  20:09:23 DEBUG| [stdout] cpuctl_test_fj    1  TFAIL  :  ltpapicmd.c:188: case12    FAIL
  20:09:23 DEBUG| [stdout] mount: /dev/cpuctl: cpuctl already mounted or mount point busy.
  20:09:23 DEBUG| [stdout] cpuctl_test_fj    1  TFAIL  :  ltpapicmd.c:188: failed to mount cpu subsystem... Exiting
  20:09:23 DEBUG| [stdout] cpuctl_test_fj    1  TFAIL  :  ltpapicmd.c:188: case13    FAIL
  20:09:23 DEBUG| [stdout] mount: /dev/cpuctl: cpuctl already mounted or mount point busy.
  20:09:23 DEBUG| [stdout] cpuctl_test_fj    1  TFAIL  :  ltpapicmd.c:188: failed to mount cpu subsystem... Exiting
  20:09:23 DEBUG| [stdout] cpuctl_test_fj    1  TFAIL  :  ltpapicmd.c:188: case14    FAIL
  20:09:23 DEBUG| [stdout] mount: /dev/cpuctl: cpuctl already mounted or mount point busy.
  20:09:23 DEBUG| [stdout] cpuctl_test_fj    1  TFAIL  :  ltpapicmd.c:188: failed to mount cpu subsystem... Exiting
  20:09:23 DEBUG| [stdout] cpuctl_test_fj    1  TFAIL  :  ltpapicmd.c:188: case15    FAIL
  20:09:23 DEBUG| [stdout] mount: /dev/cpuctl: cpuctl already mounted or mount point busy.
  20:09:23 DEBUG| [stdout] cpuctl_test_fj    1  TFAIL  :  ltpapicmd.c:188: failed to mount cpu subsystem... Exiting
  20:09:23 DEBUG| [stdout] cpuctl_test_fj    1  TFAIL  :  ltpapicmd.c:188: case16    FAIL
  20:09:23 DEBUG| [stdout] mount: /dev/cpuctl: cpuctl already mounted or mount point busy.
  20:09:23 DEBUG| [stdout] cpuctl_test_fj    1  TFAIL  :  ltpapicmd.c:188: failed to mount cpu subsystem... Exiting
  20:09:23 DEBUG| [stdout] cpuctl_test_fj    1  TFAIL  :  ltpapicmd.c:188: case17    FAIL
  20:09:23 DEBUG| [stdout] mount: /dev/cpuctl: cpuctl already mounted or mount point busy.
  20:09:23 DEBUG| [stdout] cpuctl_test_fj    1  TFAIL  :  ltpapicmd.c:188: failed to mount cpu subsystem... Exiting
  20:09:23 DEBUG| [stdout] cpuctl_test_fj    1  TFAIL  :  ltpapicmd.c:188: case18    FAIL
  20:09:23 DEBUG| [stdout] mount: /dev/cpuctl: cpuctl already mounted or mount point busy.
  20:09:23 DEBUG| [stdout] cpuctl_test_fj    1  TFAIL  :  ltpapicmd.c:188: failed to mount cpu subsystem... Exiting
  20:09:23 DEBUG| [stdout] cpuctl_test_fj    1  TFAIL  :  ltpapicmd.c:188: case19    FAIL
  20:09:23 DEBUG| [stdout] mount: /dev/cpuctl: cpuctl already mounted or mount point busy.
  20:09:23 DEBUG| [stdout] cpuctl_test_fj    1  TFAIL  :  ltpapicmd.c:188: failed to mount cpu subsystem... Exiting
  20:09:23 DEBUG| [stdout] cpuctl_test_fj    1  TFAIL  :  ltpapicmd.c:188: case20    FAIL
  20:09:23 DEBUG| [stdout] mount: /dev/cpuctl: cpuctl already mounted or mount point busy.
  20:09:23 DEBUG| [stdout] cpuctl_test_fj    1  TFAIL  :  ltpapicmd.c:188: failed to mount cpu subsystem... Exiting
  20:09:23 DEBUG| [stdout] cpuctl_test_fj    1  TFAIL  :  ltpapicmd.c:188: case21    FAIL
  20:09:23 DEBUG| [stdout] mount: /dev/cpuctl: cpuctl already mounted or mount point busy.
  20:09:23 DEBUG| [stdout] cpuctl_test_fj    1  TFAIL  :  ltpapicmd.c:188: failed to mount cpu subsystem... Exiting
  20:09:23 DEBUG| [stdout] cpuctl_test_fj    1  TFAIL  :  ltpapicmd.c:188: case22    FAIL

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