ubuntu-kernel-tests

cpuhotplug03 in cpuhotplug from ubuntu_ltp failed after successful CPU1 offline

Bug #1931390 reported by Krzysztof Kozlowski
8
This bug affects 1 person
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ubuntu-kernel-tests
New
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linux (Ubuntu)
Incomplete
Undecided
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Bug Description

In cpuhotplug (ubuntu_ltp) tests, offline and online of CPU1 succeeds, but later the test fails with:

utils:0153| [stdout] Name: cpuhotplug03
utils:0153| [stdout] Date: Wed Jun 9 03:52:16 UTC 2021
utils:0153| [stdout] Desc: Do tasks get scheduled to a newly on-lined CPU?
utils:0153| [stdout]
utils:0153| [stdout] CPU is 1
utils:0153| [stdout] USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
utils:0153| [stdout] root 858611 0.0 0.0 2616 540 ? R 03:52 0:00 /bin/sh /opt/ltp/testcases/bin/cpuhotplug_do_spin_loop
...
...
...
utils:0153| [stdout] 49 /bin/sh /opt/ltp/testcases/bin/cpuhotplug_do_spin_loop
utils:0153| [stdout] 82 /bin/sh /opt/ltp/testcases/bin/cpuhotplug_do_spin_loop
utils:0153| [stdout] 18 /bin/sh /opt/ltp/testcases/bin/cpuhotplug_do_spin_loop
utils:0153| [stdout] cpuhotplug03 1 TFAIL: No cpuhotplug_do_spin_loop processes found on CPU1
utils:0153| [stdout] tag=cpuhotplug03 stime=1623210736 dur=3 exit=exited stat=1 core=no cu=22260 cs=78

IMPORTANT: The CPU1 got properly offlined and onlined. For failures of CPU1 offline, please see lp:1836167 (reported previously as part of lp:1836167).

Po-Hsu Lin (cypressyew) wrote on 2020-09-25:
On F-oem-5.6 with node glameow:
cpuhotplug03 1 TFAIL: No cpuhotplug_do_spin_loop processes found on CPU1

Kelsey Skunberg (kelsey-skunberg) wrote on 2020-10-06:
spotted on Focal aws : 5.4.0-1026.26 : amd64
cpuhotplug03 1 TFAIL: No cpuhotplug_do_spin_loop processes found on CPU1

Po-Hsu Lin (cypressyew) wrote on 2021-06-09:
Found on 5.11.0-1005.5 - intel
Node spitfire, passed on node bavor.
cpuhotplug03 1 TFAIL: No cpuhotplug_do_spin_loop processes found on CPU1

See original description
Revision history for this message
Krzysztof Kozlowski (krzk) wrote :

Failure from: 5.11.0-1005.5-intel/focal-linux-intel-intel-amd64-5.11.0-spitfire-ubuntu_ltp/ubuntu_ltp/results/ubuntu_ltp.cpuhotplug/debug/ubuntu_ltp.cpuhotplug.DEBUG.html

tags: added: 5.11 hwe sru-20210104 sru-20210315 sru-20210412 sru-20210531
tags: added: 5.6 aws focal oem
tags: added: affects.dgx2 ubuntu-ltp
Krzysztof Kozlowski (krzk)
description: updated
Revision history for this message
Ubuntu Kernel Bot (ubuntu-kernel-bot) wrote : Missing required logs.

This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:

apport-collect 1931390

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

Changed in linux (Ubuntu):
status: New → Incomplete
Revision history for this message
Po-Hsu Lin (cypressyew) wrote :

This issue can be found on F-AWS 5.13.0-1008.9~20.04.2 with instance c6g.8xlarge, it's a bit flaky on it.

Running tests.......
Name: cpuhotplug03
Date: Thu Dec 23 09:14:59 UTC 2021
Desc: Do tasks get scheduled to a newly on-lined CPU?

CPU is 1
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
root 758483 0.0 0.0 2052 516 ? R 09:14 0:00 /bin/sh /opt/ltp/testcases/bin/cpuhotplug_do_spin_loop
root 758484 0.0 0.0 2052 480 ? R 09:14 0:00 /bin/sh /opt/ltp/testcases/bin/cpuhotplug_do_spin_loop
...
  3 /bin/sh /opt/ltp/testcases/bin/cpuhotplug_do_spin_loop
 21 /bin/sh /opt/ltp/testcases/bin/cpuhotplug_do_spin_loop
 21 /bin/sh /opt/ltp/testcases/bin/cpuhotplug_do_spin_loop
cpuhotplug03 1 TFAIL: No cpuhotplug_do_spin_loop processes found on CPU1
INFO: ltp-pan reported some tests FAIL
LTP Version: 20210927
INFO: Test end time: Thu Dec 23 09:15:01 UTC 2021

tags: added: 5.13 sru-20211129
Revision history for this message
Cory Todd (corytodd) wrote :

This affects jammy:linux-oracle-5.15-1040.46 for the 2023.07.10 cycle

The issue is a bit flaky, fails maybe 1/5 times.

tags: added: sru-20230710
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