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2026-04-07 - 18:56
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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 Tue Apr 07, 2026 12:45:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
862999294,15cyclictest0-21swapper/009:50:210
8634992016,3cyclictest0-21swapper/207:27:472
863099204,1cyclictest21114-21cat12:15:141
863499193,9cyclictest0-21swapper/208:00:012
863499192,16cyclictest1377-21lxd12:06:432
863099192,16cyclictest0-21swapper/109:47:301
8630991917,1cyclictest0-21swapper/111:10:011
863099190,1cyclictest0-21swapper/111:40:001
863499182,15cyclictest0-21swapper/210:15:192
8634991815,2cyclictest23592-21iwlist08:30:152
863499180,3cyclictest16793-21snapd10:40:182
863099182,15cyclictest0-21swapper/111:45:231
8630991816,1cyclictest0-21swapper/108:07:271
8630991815,2cyclictest3981-21H222:10:211
863099181,16cyclictest0-21swapper/109:26:561
863099180,2cyclictest31399-21fschecks_time09:40:151
8629991814,3cyclictest16745-21snapd08:02:480
8629991814,2cyclictest26373-21nfsd409:30:180
862999181,15cyclictest3989-21H222:10:210
862999180,17cyclictest16744-21snapd11:57:470
862999180,16cyclictest11081-21open_inodes10:00:190
863499172,1cyclictest28-21ksoftirqd/210:20:372
863499172,1cyclictest28-21ksoftirqd/207:42:152
8634991716,1cyclictest28-21ksoftirqd/210:47:082
8634991715,1cyclictest0-21swapper/212:20:142
8634991714,2cyclictest7575-21fschecks_time09:55:142
8634991714,2cyclictest3624-21timerwakeupswit08:50:222
8634991714,2cyclictest3086-21postgres09:16:282
8634991714,2cyclictest28197-21cat11:30:132
8634991714,2cyclictest25944-21kernelversion11:25:172
8634991714,2cyclictest22603-21awk07:35:112
8634991714,2cyclictest14469-21postgres12:02:302
8634991714,2cyclictest12195-21timerandwakeup09:05:192
8634991714,2cyclictest10778-21timerwakeupswit07:10:212
863499170,2cyclictest9956-21wc08:05:202
863499170,2cyclictest3985-21H222:10:212
863499170,2cyclictest30625-21python307:50:022
863499170,2cyclictest15891-21chrt11:05:522
863499170,2cyclictest13737-21grep09:10:122
863499170,2cyclictest0-21swapper/208:00:212
863499170,1cyclictest0-21swapper/211:48:092
863499170,16cyclictest9262-21mailstats09:00:202
863499170,16cyclictest4866-21dpkg08:55:002
863499170,16cyclictest3987-21H222:10:212
863499170,16cyclictest31913-21proc_pri11:35:182
863499170,16cyclictest31084-21smtp10:38:172
863499170,16cyclictest3023-21timerwakeupswit11:40:222
863499170,16cyclictest29911-21mailstats08:40:202
863499170,16cyclictest28452-21fschecks_time09:35:162
863499170,16cyclictest28248-21chrt12:26:492
863499170,16cyclictest27481-21nfsd410:30:172
863499170,16cyclictest23622-21nfsd411:20:172
863499170,16cyclictest19505-21/usr/sbin/munin11:15:202
863499170,16cyclictest1521-21lxd09:40:422
863499170,16cyclictest14680-21df08:15:152
863499170,16cyclictest1035-21thermald11:50:202
8630991715,1cyclictest29138-21cpuspeed_turbos10:35:151
8630991715,1cyclictest0-21swapper/108:35:181
8630991714,2cyclictest9670-21awk10:55:191
8630991714,2cyclictest8914-21nfsd409:00:161
8630991714,2cyclictest4763-21smtp07:58:151
8630991714,2cyclictest455-21plymouthd08:55:171
8630991714,2cyclictest446-21memory10:40:171
8630991714,2cyclictest4461-21processes10:45:211
8630991714,2cyclictest4035-21H222:10:211
8630991714,2cyclictest27408-21nfsd410:30:171
8630991714,2cyclictest26191-21/usr/sbin/munin12:25:111
8630991714,2cyclictest19436-21gpg-connect-age09:20:011
8630991714,2cyclictest16902-21switchtime10:10:201
8630991714,2cyclictest16802-21sed07:25:001
8630991714,2cyclictest1521-21lxd09:16:411
8630991713,3cyclictest2282-21nfsd411:40:181
8630991713,3cyclictest0-21swapper/108:10:131
863099170,2cyclictest897-21sshd08:49:121
863099170,2cyclictest863-21avahi-daemon11:20:201
863099170,2cyclictest2069-21systemd-udevd07:30:521
863099170,2cyclictest14582-21taskset12:04:041
863099170,16cyclictest7925-21sed09:55:171
863099170,16cyclictest615-21nvmesmart_nvme012:35:181
863099170,16cyclictest25399-21expr09:30:131
863099170,16cyclictest19934-21lxcfs08:25:001
863099170,16cyclictest16328-21chrt08:19:081
863099170,16cyclictest16242-21cut09:15:011
863099170,16cyclictest12351-21/usr/sbin/munin10:05:191
8629991715,1cyclictest9-21ksoftirqd/009:01:150
8629991714,2cyclictest31375-21expr08:45:140
8629991714,2cyclictest28726-21ls11:30:160
8629991714,2cyclictest24782-21nfsd410:25:150
8629991714,2cyclictest22727-21cpuspeed_turbos07:35:130
8629991714,2cyclictest19511-21pzem_power12:10:180
8629991714,2cyclictest17771-21irqstats08:20:180
8629991714,2cyclictest14842-21munin-run10:10:010
8629991714,2cyclictest12389-21grep11:00:190
862999171,15cyclictest2562-21sh10:45:000
862999170,2cyclictest3976-21H222:10:210
862999170,2cyclictest356-21grep12:35:170
862999170,2cyclictest26190-21apache_accesses12:25:120
862999170,2cyclictest25753-21idleruntime11:25:150
862999170,2cyclictest17769-21fschecks_count07:25:140
862999170,2cyclictest12923-21dpkg09:09:590
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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