Excessive CPU usage every 58 seconds
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
udev (Ubuntu) |
New
|
Undecided
|
Unassigned |
Bug Description
After the system has been running for several hours the CPU usage spikes approximately every 58 seconds. I ran 'top' and noticed that systemd and dbus were using the CPU. I then ran 'dbus-monitor --system' and saw a large stream of messages corresponding to the CPU consumption. I've attached the output of 'dbus-monitor' with the bug report. The output represents about 8 seconds of monitoring and it is over 3M. If you look at it you'll notice that it is mostly the same message from several diskseq devices referring to /sys/devices/
The output of 'systemctl list-units' references the same device and notes that it is a memory card reader.
ProblemType: Bug
DistroRelease: Ubuntu 22.10
Package: udev 251.4-1ubuntu7.1
ProcVersionSign
Uname: Linux 5.19.0-35-generic x86_64
ApportVersion: 2.23.1-0ubuntu3
Architecture: amd64
CasperMD5CheckR
CurrentDesktop: ubuntu:GNOME
CustomUdevRuleF
Date: Sat Mar 18 12:40:09 2023
InstallationDate: Installed on 2020-01-22 (1150 days ago)
InstallationMedia: Ubuntu 19.10 "Eoan Ermine" - Release amd64 (20191017)
MachineType: HP HP Pavilion Desktop PC 570-p0xx
ProcKernelCmdLine: BOOT_IMAGE=
SourcePackage: systemd
UpgradeStatus: Upgraded to kinetic on 2023-02-25 (20 days ago)
dmi.bios.date: 10/30/2017
dmi.bios.release: 5.12
dmi.bios.vendor: AMI
dmi.bios.version: F.20
dmi.board.
dmi.board.name: 82FE
dmi.board.vendor: HP
dmi.board.version: 11
dmi.chassis.
dmi.chassis.type: 3
dmi.chassis.vendor: HP
dmi.modalias: dmi:bvnAMI:
dmi.product.family: 103C_53311M HP Pavilion
dmi.product.name: HP Pavilion Desktop PC 570-p0xx
dmi.product.sku: Z5P18AA#ABL
dmi.sys.vendor: HP
description: | updated |
affects: | ubuntu → udev (Ubuntu) |
summary: |
- Excessive CPU usage every 9 seconds + Excessive CPU usage every 58 seconds |
description: | updated |
description: | updated |
There is also output from 'udevadm monitor'. I've added an attachment for the output.