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2025-11-20 - 05:39

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, slot #3

Rack #0/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #1/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #2/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #3/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #4/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #5/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #6/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #7/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #8/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #9/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #a/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #b/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #c/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #d/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #e/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #f/#0 #1 #2 #3 #4 #5 #6 #7 #8 
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Click on a legend element to toggle display of that core, ctrl-click inverts display, shift-click enables all.

Data to construct the above plot have been generated using the RT test utility cyclictest.

Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rackeslot3s.osadl.org (updated Thu Nov 20, 2025 00:45:06)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3515991996717,16cyclictest3525330-21latency_hist22:10:022
3515991996517,14cyclictest3520508-21systemd-run20:40:002
3515991996515,13cyclictest3518336-21date19:55:022
3515991996422,13cyclictest1-21systemd00:15:022
3515991996422,13cyclictest1-21systemd00:15:012
3515991996416,14cyclictest3532256-21munin-run00:25:002
3515991996412,17cyclictest3523020-21latency_hist21:25:032
3515991996316,16cyclictest3531520-21sed00:10:022
3515991996315,15cyclictest3528591-21systemctl23:15:002
3515991996314,16cyclictest3525431-21munin-run22:15:012
3515991996314,15cyclictest3516509-21cut19:20:012
3515991996114,14cyclictest3529372-21munin-run23:30:012
3515991996014,15cyclictest3517451-21cat19:40:012
3515991995941,12cyclictest30-21ksoftirqd/223:24:592
3515991995940,14cyclictest235-21systemd-journal23:20:012
3515991995914,17cyclictest3519624-21sed20:20:012
3515987995637,14cyclictest1-21systemd22:44:201
3515996995536,14cyclictest1-21systemd20:10:003
3515996995435,14cyclictest1-21systemd20:30:013
3515996995435,14cyclictest1-21systemd20:30:003
3515991995312,10cyclictest272-21dbus-daemon23:10:012
3515987995336,13cyclictest1-21systemd23:15:001
3515991995239,9cyclictest48-21kcompactd021:56:342
3515991995236,13cyclictest3529595-21sshd23:31:262
3515991995236,12cyclictest3526692-21sshd22:38:282
3515991995233,15cyclictest3530658-21munin-run23:54:592
3515991995137,11cyclictest3523056-21sshd21:25:272
3515991995135,13cyclictest3520987-21sshd20:49:272
3515991995134,13cyclictest3521237-21sshd20:54:282
351598799512,22cyclictest3516891-21kworker/u8:019:45:021
351598799512,22cyclictest3516891-21kworker/u8:019:45:021
351598299512,15cyclictest3523092-21munin-run21:29:590
351599699507,15cyclictest131rcu_preempt19:45:033
351599699507,15cyclictest131rcu_preempt19:45:023
3515996995011,7cyclictest131rcu_preempt23:00:003
3515991995041,5cyclictest3526992-21apt-get22:44:202
3515991995037,9cyclictest3517660-21munin-run19:45:022
3515991995037,9cyclictest3517660-21munin-run19:45:012
3515991995035,12cyclictest3520716-21sshd20:40:272
3515991995035,12cyclictest3520716-21sshd20:40:262
3515991995034,13cyclictest3525635-21sshd22:15:272
3515991995029,15cyclictest3516669-21modprobe19:25:012
3515982995015,29cyclictest272-21dbus-daemon23:00:010
3515991994933,13cyclictest3526185-21sshd22:27:282
3515982994933,11cyclictest3528829-21cron23:20:000
3515996994832,12cyclictest235-21systemd-journal21:15:013
3515996994827,17cyclictest1-21systemd00:00:003
3515991994832,12cyclictest1-21systemd22:55:022
3515991994831,13cyclictest363-21snmpd23:57:432
3515987994811,12cyclictest23-21ksoftirqd/100:35:001
3515982994839,6cyclictest3515983-21latency_hist19:10:010
3515982994830,13cyclictest272-21dbus-daemon20:30:010
3515982994830,13cyclictest272-21dbus-daemon20:30:000
3515996994732,12cyclictest37-21ksoftirqd/322:55:003
3515996994723,17cyclictest272-21dbus-daemon23:40:013
3515991994736,8cyclictest3522266-21sshd21:11:042
3515991994735,9cyclictest3524363-21sshd21:54:272
3515991994734,10cyclictest3532474-21sshd00:26:282
3515991994734,10cyclictest3532474-21sshd00:26:272
3515991994734,10cyclictest3523564-21sshd21:36:082
3515991994734,10cyclictest3523564-21sshd21:36:072
3515991994733,10cyclictest3529859-21sshd23:39:272
3515991994732,12cyclictest3521471-21sshd20:55:282
3515991994732,12cyclictest3521471-21sshd20:55:272
3515991994730,12cyclictest363-21snmpd21:19:592
3515991994728,13cyclictest272-21dbus-daemon20:10:012
3515991994727,16cyclictest3527834-21true23:00:002
3515987994735,7cyclictest3522571-21modprobe21:20:001
351599699462,35cyclictest235-21systemd-journal21:55:033
3515991994634,8cyclictest48-21kcompactd022:49:152
3515991994633,9cyclictest48-21kcompactd020:28:202
3515991994633,9cyclictest48-21kcompactd020:28:192
3515991994632,10cyclictest3520220-21munin-run20:35:002
3515991994631,11cyclictest3517149-21munin-run19:35:012
3515991994628,14cyclictest363-21snmpd00:16:502
3515991994627,14cyclictest3518379-21cron20:00:012
3515987994630,12cyclictest1-21systemd00:15:011
3515987994630,12cyclictest1-21systemd00:15:001
3515987994627,15cyclictest3532241-21sshd00:24:281
3515996994528,13cyclictest37-21ksoftirqd/319:40:003
3515991994533,9cyclictest48-21kcompactd021:06:382
3515991994533,9cyclictest3524092-21sshd21:45:282
3515991994532,9cyclictest363-21snmpd19:47:442
3515991994532,10cyclictest3531177-21sshd00:03:272
3515991994531,11cyclictest3530119-21sshd23:40:282
351598299454,3cyclictest131rcu_preempt21:31:210
3515982994531,10cyclictest272-21dbus-daemon22:40:020
3515982994519,8cyclictest131rcu_preempt22:44:200
351598299451,3cyclictest131rcu_preempt19:30:010
3515996994433,8cyclictest235-21systemd-journal00:30:013
3515996994433,8cyclictest235-21systemd-journal00:30:013
3515996994425,14cyclictest272-21dbus-daemon21:40:013
3515996994425,14cyclictest272-21dbus-daemon21:40:013
3515996994419,20cyclictest361rcuc/321:30:013
3515991994434,7cyclictest3519689-21sshd20:22:282
3515991994433,8cyclictest48-21kcompactd021:01:382
3515991994431,9cyclictest3532730-21sshd00:32:272
3515991994425,15cyclictest363-21snmpd22:21:492
3515991994420,20cyclictest3533021-21systemctl00:40:002
3515987994429,11cyclictest3525965-21systemd-run22:25:011
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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