cpuacct_100_100 from controllers test suite in LTP failed

[Po-Hsu Lin]

 startup='Wed May 22 06:50:45 2019'
 cpuacct 1 TINFO: timeout per run is 0h 5m 0s
 cpuacct 1 TINFO: cpuacct: /sys/fs/cgroup/cpu,cpuacct
 cpuacct 1 TINFO: Creating 100 subgroups each with 100 processes
 /opt/ltp/testcases/bin/cpuacct.sh: -2110094999: /opt/ltp/testcases/bin/cpuacct.sh: Cannot fork
 tag=cpuacct_100_100 stime=1558507845 dur=9 exit=exited stat=2 core=no cu=30 cs=53

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: linux-image-4.15.0-50-generic 4.15.0-50.54
ProcVersionSignature: User Name 4.15.0-50.54-generic 4.15.18
Uname: Linux 4.15.0-50-generic x86_64
AlsaDevices:
 total 0
 crw-rw---- 1 root audio 116, 1 May 22 02:57 seq
 crw-rw---- 1 root audio 116, 33 May 22 02:57 timer
AplayDevices: Error: [Errno 2] No such file or directory: 'aplay': 'aplay'
ApportVersion: 2.20.9-0ubuntu7.6
Architecture: amd64
ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord': 'arecord'
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
CurrentDmesg:

Date: Wed May 22 06:59:27 2019
IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig': 'iwconfig'
Lsusb: Bus 001 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
MachineType: QEMU Standard PC (i440FX + PIIX, 1996)
PciMultimedia:

ProcFB: 0 cirrusdrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-50-generic root=UUID=576666e8-9e7f-40ee-934e-f1dce18323e5 ro
RelatedPackageVersions:
 linux-restricted-modules-4.15.0-50-generic N/A
 linux-backports-modules-4.15.0-50-generic N/A
 linux-firmware 1.173.6
RfKill: Error: [Errno 2] No such file or directory: 'rfkill': 'rfkill'
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 04/01/2014
dmi.bios.vendor: SeaBIOS
dmi.bios.version: Ubuntu-1.8.2-1ubuntu1
dmi.chassis.type: 1
dmi.chassis.vendor: QEMU
dmi.chassis.version: pc-i440fx-xenial
dmi.modalias: dmi:bvnSeaBIOS:bvrUbuntu-1.8.2-1ubuntu1:bd04/01/2014:svnQEMU:pnStandardPC(i440FX+PIIX,1996):pvrpc-i440fx-xenial:cvnQEMU:ct1:cvrpc-i440fx-xenial:
dmi.product.name: Standard PC (i440FX + PIIX, 1996)
dmi.product.version: pc-i440fx-xenial
dmi.sys.vendor: QEMU

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

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 1829978

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.

[Po-Hsu Lin (cypressyew)]

Test passed with Cosmic:
 tag=cpuacct_100_100 stime=1558480324
 cmdline="cpuacct.sh 100 100"
 contacts=""
 analysis=exit
 <<>>
 cpuacct 1 TINFO: timeout per run is 0h 5m 0s
 cpuacct 1 TINFO: cpuacct: /sys/fs/cgroup/cpu,cpuacct
 cpuacct 1 TINFO: Creating 100 subgroups each with 100 processes
 cpuacct 1 TPASS: cpuacct.usage is not equal to 0 for every subgroup
 cpuacct 1 TPASS: cpuacct.usage equal to subgroup*/cpuacct.usage
 cpuacct 2 TINFO: removing created directories

 Summary:
 passed 2
 failed 0
 skipped 0
 warnings 0

[Kelsey Steele (kelsey-steele)]

Spotted on Focal/azure : 5.4.0-1029.29 : amd64

[Kelsey Steele (kelsey-steele)]

failed on Bionic/azure-4.15 : 4.15.0-1097.107 : amd64

[Kelsey Steele (kelsey-steele)]

Found on Groovy/linux 5.8.0-31.33

[Francis Ginther (fginther)]

Seen with linux-oracle 4.15.0-1065.73.

[Ian May (ian-may)]

bionic/linux-aws: 4.15.0-1103.110

[Ian May (ian-may)]

Found on bionic/linux-aws-fips: 4.15.0-2045.47

[Ian May (ian-may)]

Found on bionic/linux-aws-5.4: 5.4.0-1049.51~18.04.1

[Ian May (ian-may)]

Found on bionic/linux-azure-4.15: 4.15.0-1115.128

[Krzysztof Kozlowski (krzk)]

Found on Azure Standard_B1ms instances:
 - hirsute/linux-azure 5.11.0-1007.7
 - groovy/linux-azure 5.8.0-1033.35
 - groovy/linux-azure 5.8.0-1034.36-azure
 - focal/linux-azure 5.8.0-1033.35~20.04.1
 - focal/linux-azure 5.4.0-1049.51
 - bionic/linux-azure 5.4.0-1049.51~18.04.1

Does not appear on other instances, therefore I propose to skip this part on Standard_B1ms.

On Standard_B1ms this seems to be systemd runtime configuration limit. Visible in dmesg:
[ 926.863344] LTP: starting cpuacct_100_100 (cpuacct.sh 100 100)
[ 934.298505] cgroup: fork rejected by pids controller in /user.slice/user-1000.slice/session-3.scope

[Krzysztof Kozlowski (krzk)]

AWS t2.small (1 CPU, 2 GB RAM) fails the same on focal/linux-aws 5.4.0-1045-aws:

cpuacct 1 TINFO: timeout per run is 0h 5m 0s
cpuacct 1 TINFO: cpuacct: /sys/fs/cgroup/cpu,cpuacct
cpuacct 1 TINFO: Creating 100 subgroups each with 100 processes
/home/ubuntu/ltp-install/testcases/bin/cpuacct.sh: 0: Cannot fork

[Krzysztof Kozlowski (krzk)]

AWS t3.xlarge (4 CPU, 16 GB RAM) is fine. If booted with maxcpus=1 - still works. If booted with mem=2048M, it fails the same as t2.small.

[Krzysztof Kozlowski (krzk)]

Sent patch upstream (LTP): https://lists.linux.it/pipermail/ltp/2021-June/023132.html

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Krzysztof Kozlowski (krzk)]

Found on hirsute/azure 5.11.0-1007.7