Dublin timezone cause systemd cpu high

Bug #2060082 reported by altairchan
This bug affects 1 person
Affects Status Importance Assigned to Milestone
systemd (Ubuntu)

Bug Description

Systemd version(249) in Jammy Jellyfish is too old, When using the Dublin time zone for daylight saving time switching,the CPU usage will suddenly increase to 100% starting from 2024-03-31 00:00:00 and last for 1 hour, but return to normal at 2024-03-31 02:00:00. plz backport the bugfix to v249 or update 255 version in Jammy Jellyfish to fix it. thank you.

Revision history for this message
altairchan (altairchan) wrote :
Revision history for this message
altairchan (altairchan) wrote :

how to reduce:
1. Stop clock synchronization
systemctl stop chrony

2. Set the timezone to Dublin
timedatectl set-timezone Europe/Dublin

3. Change the time to waitting for Daylight saving time switch
timedatectl set-time "2024-03-30 23:59:50"

At 0 o'clock, the system is executing atop logrotation.

# cat /etc/cron.d/atop

# daily restart of atop at midnight
0 0 * * * root [ -d "/run/systemd/system" ] || /usr/share/atop/atop.daily&
0 0 * * * root [ -d "/run/systemd/system" ] && systemctl restart atop

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