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2026-08-07 - 07:59
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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 Fri Aug 07, 2026 00:45:57)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
24623992726,0cyclictest0-21swapper/122:25:161
24624992514,10cyclictest4526-21fschecks_count23:15:172
24624992414,10cyclictest0-21swapper/219:20:172
2462499230,18cyclictest0-21swapper/221:00:152
2462399230,5cyclictest0-21swapper/121:25:411
2462399230,18cyclictest0-21swapper/121:00:171
2462399210,3cyclictest0-21swapper/122:33:311
24624992017,2cyclictest5582-21ntp_kernel_err21:25:192
24624992017,2cyclictest3976-21H222:10:212
2462499201,18cyclictest13638-21ls21:40:192
24623992018,1cyclictest0-21swapper/100:30:031
24623992016,3cyclictest0-21swapper/121:17:231
2462299203,2cyclictest19925-21python300:40:000
2462499192,16cyclictest3990-21H222:10:212
24624991916,2cyclictest5315-21missed_timers19:30:182
24624991915,3cyclictest0-21swapper/223:01:102
2462499190,18cyclictest0-21swapper/221:53:522
2462399190,16cyclictest4099-21H222:10:211
2462399190,16cyclictest4035-21H222:10:211
24622991917,1cyclictest14015-21ntp_states19:45:190
2462299190,1cyclictest0-21swapper/023:10:140
2462299190,1cyclictest0-21swapper/023:10:130
2462499182,1cyclictest316972chrt22:13:112
2462499182,15cyclictest28-21ksoftirqd/220:23:242
2462499182,15cyclictest0-21swapper/222:04:092
24624991816,1cyclictest3979-21H222:10:212
24624991815,2cyclictest17739-21munin-run23:40:002
24624991814,3cyclictest2007-21systemd-journal23:07:392
2462499181,2cyclictest6077-21cpuspeed_turbos00:15:142
2462499180,3cyclictest18726-21chrt20:54:132
2462499180,2cyclictest22076-21nfsd420:00:192
2462499180,1cyclictest3987-21H222:10:212
2462499180,1cyclictest0-21swapper/221:39:112
2462399182,15cyclictest6714-21awk20:30:191
2462399182,15cyclictest0-21swapper/123:14:081
2462399182,15cyclictest0-21swapper/123:14:081
2462399182,15cyclictest0-21swapper/121:52:231
24623991816,1cyclictest0-21swapper/120:49:531
24623991815,2cyclictest15762-21cstates21:45:161
24623991814,1cyclictest0-21swapper/120:50:151
24623991813,1cyclictest0-21swapper/120:15:181
2462399181,16cyclictest6758-21cupsd23:20:151
2462399181,16cyclictest3985-21H222:10:211
2462399181,16cyclictest1351-21lxd00:06:361
2462399181,15cyclictest3991-21H222:10:211
2462399180,2cyclictest30087-21smtp19:16:341
2462399180,17cyclictest12134-21latency_hist21:40:001
2462399180,17cyclictest1043-21grep22:15:191
2462299182,1cyclictest0-21swapper/000:32:570
2462299182,15cyclictest0-21swapper/020:36:460
24622991816,1cyclictest0-21swapper/021:19:230
24622991815,2cyclictest26616-21tlsmgr21:32:230
24622991815,2cyclictest22388-21sensors21:55:210
24622991815,2cyclictest1071-21nfsd400:05:170
24622991814,3cyclictest17655-21latency_hist22:45:010
2462299181,16cyclictest27572-21/usr/sbin/munin21:10:190
2462299181,16cyclictest18589-21taskset20:52:200
2462299180,3cyclictest2334-21sed21:20:210
2462299180,3cyclictest13495-21bounce00:26:380
2462299180,3cyclictest13495-21bounce00:26:370
2462299180,2cyclictest3991-21H222:10:210
2462299180,1cyclictest0-21swapper/019:54:360
2462299180,17cyclictest3981-21H222:10:210
24624991714,2cyclictest3991-21H222:10:212
24624991714,2cyclictest3979-21H222:10:212
24624991714,2cyclictest3976-21H222:10:212
24624991714,2cyclictest32535-21cat00:05:142
24624991714,2cyclictest31125-21cstates21:15:122
24624991714,2cyclictest29630-21expr20:15:132
24624991714,2cyclictest25100-21tr22:55:212
24624991714,2cyclictest2069-21systemd-udevd19:48:522
24624991714,2cyclictest16498-21head21:45:192
24624991714,2cyclictest14828-21chrt22:39:062
2462499171,1cyclictest0-21swapper/220:25:172
2462499171,15cyclictest9354-21cpuspeed_turbos22:30:142
2462499170,2cyclictest517-21grep23:10:122
2462499170,2cyclictest517-21grep23:10:122
2462499170,2cyclictest2872-21systemd-logind23:24:522
2462499170,2cyclictest26250-21pzem_voltage21:05:202
2462499170,2cyclictest1688-21expr21:20:182
2462499170,2cyclictest15316-21chrt22:40:012
2462499170,2cyclictest11246-21cut00:25:012
2462499170,16cyclictest8454-21processes21:30:202
2462499170,16cyclictest4099-21H222:10:212
2462499170,16cyclictest32384-21grep22:15:142
2462499170,16cyclictest27542-21sed20:10:182
2462499170,16cyclictest27418-21needreboot22:05:172
2462499170,16cyclictest25331-21timerandwakeup20:05:232
2462499170,16cyclictest23120-21dump-pmu-power22:55:012
2462499170,16cyclictest14604-21apache_processe00:30:132
2462499170,16cyclictest11685-21ls19:40:212
2462499170,16cyclictest1156-21/usr/sbin/munin19:25:122
2462499170,16cyclictest0-21swapper/221:57:292
2462499170,16cyclictest0-21swapper/219:55:152
24623991715,1cyclictest3979-21H222:10:211
24623991715,1cyclictest17494-21tr00:35:151
24623991715,1cyclictest0-21swapper/122:55:141
24623991715,1cyclictest0-21swapper/121:55:031
24623991714,2cyclictest5994-21latency_hist22:25:011
24623991714,2cyclictest30244-21hddtemp_smartct22:10:141
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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