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2026-03-15 - 18:02
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Data to construct the above plot have been generated using the RT test utility cyclictest.
Unexpectedly long latencies may be caused by SMIs
Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Characteristics of the 100 highest latencies:
System rackdslot0.osadl.org (updated Sun Mar 15, 2026 12:45:58)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
20995992624,1cyclictest0-21swapper/209:05:162
20987992423,1cyclictest0-21swapper/110:48:371
2098799220,20cyclictest870-21systemd-logind12:06:521
20995992117,3cyclictest0-21swapper/212:23:282
2098799203,16cyclictest0-21swapper/107:30:201
20986992019,1cyclictest9-21ksoftirqd/010:48:360
20986992016,3cyclictest3053-21systemd-logind12:10:520
2098699200,19cyclictest843-21systemd-network08:06:050
2099599194,13cyclictest0-21swapper/208:11:012
2098799194,1cyclictest0-21swapper/110:25:291
2098799190,18cyclictest16183-21tr10:50:131
2098699192,16cyclictest13006-21expr07:50:170
20995991816,1cyclictest0-21swapper/211:30:172
20995991816,1cyclictest0-21swapper/211:15:012
20995991815,3cyclictest0-21swapper/210:53:412
2099599181,16cyclictest0-21swapper/212:17:582
2099599180,17cyclictest28564-21latency09:15:172
2099599180,17cyclictest22641-21needreboot11:00:172
20987991815,2cyclictest32612-21needreboot10:20:171
2098799181,2cyclictest7393-21latency_hist12:30:011
20987991812,5cyclictest426-21systemd-udevd11:02:521
2098799181,16cyclictest3053-21systemd-logind08:42:511
2098799180,4cyclictest426-21systemd-udevd10:16:511
2098799180,1cyclictest0-21swapper/108:58:391
20986991813,3cyclictest792-21cpuspeed_turbos09:25:130
20995991715,1cyclictest16141-21nfsd411:45:152
20995991715,1cyclictest0-21swapper/207:10:202
20995991714,2cyclictest5411-21/usr/sbin/munin11:25:222
20995991714,2cyclictest471-21latency_hist09:25:012
20995991714,2cyclictest15638-21postgres08:54:522
20995991714,2cyclictest1486-21snapd09:50:082
20995991714,2cyclictest13574-21cstates10:45:122
20995991714,2cyclictest11165-21sed09:40:212
20995991714,2cyclictest10559-21/usr/sbin/munin10:40:222
2099599170,2cyclictest3414-21master07:47:032
2099599170,2cyclictest30574-21timerwakeupswit12:10:202
2099599170,2cyclictest30007-21cut07:25:142
2099599170,2cyclictest30007-21cut07:25:132
2099599170,2cyclictest21364-21nfsd408:05:192
2099599170,16cyclictest7532-21latency_hist12:30:002
2099599170,16cyclictest32288-21vmstat11:15:232
2099599170,16cyclictest28713-21expr08:20:142
2099599170,16cyclictest26612-21fschecks_count10:10:132
2099599170,16cyclictest26471-21sessionclean11:08:582
2099599170,16cyclictest25541-21pzem_energy07:15:212
2099599170,16cyclictest21227-21python309:05:002
2099599170,16cyclictest18241-21chrt08:58:212
2099599170,16cyclictest1643-21awk07:30:192
2099599170,16cyclictest1522-21lxd07:40:412
2099599170,16cyclictest1490-21snapd12:32:592
2099599170,16cyclictest1404-21fschecks_count11:20:122
2099599170,16cyclictest1404-21fschecks_count11:20:122
2099599170,16cyclictest13766-21sendmail_mailst11:40:222
2099599170,16cyclictest11680-21snapd07:22:392
2099599170,16cyclictest10649-21expr11:35:172
2098799172,1cyclictest31123-21date12:15:001
20987991714,2cyclictest28327-21date11:10:151
20987991714,2cyclictest25440-21munin-run12:05:001
20987991714,2cyclictest20289-21latency_hist11:55:011
20987991714,2cyclictest15517-21memory07:55:171
20987991714,1cyclictest0-21swapper/111:55:181
2098799170,2cyclictest5659-21hddtemp_smartct10:30:141
2098799170,2cyclictest3053-21systemd-logind09:24:521
2098799170,2cyclictest28815-21nfsd409:15:181
2098799170,2cyclictest2872-21systemd-logind11:34:521
2098799170,2cyclictest24419-21expr07:15:131
2098799170,2cyclictest23552-21mailstats09:05:201
2098799170,2cyclictest23220-21expr10:05:131
2098799170,2cyclictest2139-21/usr/sbin/munin09:25:181
2098799170,2cyclictest19987-21/usr/sbin/munin08:05:141
2098799170,2cyclictest1351-21lxd11:20:421
2098799170,2cyclictest1351-21lxd11:20:411
2098799170,2cyclictest11059-21check-new-relea07:47:001
2098799170,1cyclictest111rcu_preempt09:30:141
2098799170,16cyclictest5639-21/usr/sbin/munin08:35:161
2098799170,16cyclictest455-21plymouthd08:49:391
2098799170,16cyclictest3790-21apt-get11:25:121
2098799170,16cyclictest31056-21smartctl11:15:161
2098799170,16cyclictest3053-21systemd-logind10:12:521
2098799170,16cyclictest20776-21cron07:14:561
2098799170,16cyclictest2069-21systemd-udevd07:44:521
2098799170,16cyclictest19411-21df_inode09:00:141
2098799170,16cyclictest1517-21lxd12:32:411
2098799170,16cyclictest13848-21expr08:50:141
2098799170,16cyclictest1351-21lxd07:28:411
2098799170,16cyclictest1351-21lxd07:28:411
20986991715,1cyclictest31454-21/usr/sbin/munin12:15:130
20986991715,1cyclictest0-21swapper/011:43:080
20986991714,2cyclictest9866-21python308:45:000
20986991714,2cyclictest3651-21ps12:20:180
20986991714,2cyclictest27962-21cat09:15:130
20986991714,2cyclictest20724-21chrt10:55:430
20986991714,2cyclictest17765-21cpuspeed_turbos11:50:130
20986991714,2cyclictest1551-21snapd08:12:390
20986991714,2cyclictest0-21swapper/012:09:590
20986991712,4cyclictest870-21systemd-logind10:06:510
2098699171,15cyclictest9386-21latency_hist09:40:010
2098699171,15cyclictest4753-21smartctl07:35:190
2098699170,2cyclictest399-20systemd-journal11:14:590
2098699170,2cyclictest14481-21apt07:55:140
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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