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2026-07-22 - 10:02
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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 376 highest latencies:
System rackdslot0.osadl.org (updated Wed Jul 22, 2026 00:46:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
9402993331,1cyclictest0-21swapper/021:00:130
941299250,20cyclictest23201-21fschecks_count20:30:142
941299230,5cyclictest0-21swapper/223:50:002
941299230,5cyclictest0-21swapper/222:39:352
9402992314,5cyclictest0-21swapper/022:36:280
9406992212,0cyclictest0-21swapper/100:25:181
940699210,21cyclictest0-21swapper/121:09:451
940299211,4cyclictest455-21plymouthd21:23:400
940299210,3cyclictest0-21swapper/023:18:500
940299210,3cyclictest0-21swapper/023:18:500
9412992016,3cyclictest0-21swapper/221:51:532
941299200,19cyclictest0-21swapper/221:57:582
941299200,19cyclictest0-21swapper/221:57:572
941299200,18cyclictest1784-21awk00:35:202
940299204,15cyclictest0-21swapper/019:40:190
940299202,17cyclictest0-21swapper/021:10:010
940299202,17cyclictest0-21swapper/000:15:000
940299202,15cyclictest0-21swapper/023:50:010
940299200,18cyclictest21223-21cpuspeed_turbos19:30:130
941299193,2cyclictest455-21plymouthd20:52:582
941299193,1cyclictest11465-21basename21:05:182
941299192,1cyclictest21788-21http_loadtime22:20:152
941299192,1cyclictest0-21swapper/219:22:082
941299192,16cyclictest3992-21H222:10:212
941299192,16cyclictest20236-21cat19:25:222
941299192,15cyclictest0-21swapper/223:00:012
9412991917,1cyclictest19638-21awk22:15:182
9412991917,1cyclictest0-21swapper/222:00:022
9412991917,1cyclictest0-21swapper/221:42:482
9412991917,1cyclictest0-21swapper/219:53:562
9412991916,2cyclictest29797-21acpi19:45:132
9412991916,2cyclictest19588-21nfsd400:10:182
9412991914,4cyclictest455-21plymouthd23:25:202
941299191,17cyclictest28326-21grep21:35:152
941299190,3cyclictest0-21swapper/220:50:002
941299190,3cyclictest0-21swapper/220:35:162
941299190,16cyclictest15928-21latency_hist21:15:002
9406991915,3cyclictest0-21swapper/122:31:241
9406991911,7cyclictest0-21swapper/123:50:181
940699191,17cyclictest0-21swapper/119:55:011
940299193,1cyclictest23551-21sed20:30:180
940299192,2cyclictest7051-21rm23:50:020
940299192,2cyclictest10916-21grep19:10:170
940299192,1cyclictest0-21swapper/022:04:480
940299192,16cyclictest0-21swapper/000:39:000
9402991916,2cyclictest4906-21sensors19:55:240
9402991916,2cyclictest27230-21munin-plugin-st23:30:010
940299190,18cyclictest28328-21fschecks_time21:35:160
940299190,18cyclictest0-21swapper/000:23:130
941299182,1cyclictest258542sleep219:37:022
941299182,15cyclictest0-21swapper/220:10:012
9412991816,1cyclictest11512-21switchtime23:55:212
9412991816,1cyclictest0-21swapper/200:20:202
9412991815,2cyclictest1881-21chrt22:41:462
9412991814,3cyclictest7393-21apt-config21:00:012
9412991814,3cyclictest22458-21cpuspeed_turbos21:25:152
9412991814,3cyclictest17872-21latency_hist22:15:012
9412991814,3cyclictest12416-21grep23:00:182
941299181,16cyclictest13113-21expr22:05:162
941299180,3cyclictest26354-21cut21:30:202
941299180,3cyclictest26354-21cut21:30:202
941299180,3cyclictest18747-21sed21:20:012
941299180,2cyclictest3976-21H222:10:212
941299180,17cyclictest22375-21grep00:15:192
940699182,15cyclictest0-21swapper/122:35:021
9406991816,1cyclictest21-21ksoftirqd/119:22:071
9406991815,2cyclictest25373-21systemctl19:35:211
940699180,3cyclictest21485-21python321:25:011
940699180,17cyclictest24977-21cat20:35:011
940699180,17cyclictest23172-21postgres22:22:381
940299182,1cyclictest13224-21mailstats20:10:210
940299182,15cyclictest26549-21chrt00:25:010
940299182,15cyclictest18996-21fschecks_time19:25:170
940299182,15cyclictest0-21swapper/022:50:010
9402991816,1cyclictest0-21swapper/023:00:180
9402991816,1cyclictest0-21swapper/022:27:320
9402991816,1cyclictest0-21swapper/021:15:010
9402991815,2cyclictest11092-21sessionclean20:09:000
9402991814,3cyclictest15945-21lxd20:20:490
940299181,2cyclictest3272-21chrt23:43:270
940299181,2cyclictest25971-21cat21:30:180
940299181,2cyclictest25971-21cat21:30:170
940299181,2cyclictest17907-21awk22:14:590
940299181,16cyclictest4000-21latency_hist21:50:000
940299181,16cyclictest12623-21cmp19:15:000
940299180,3cyclictest8741-21/usr/sbin/munin21:55:210
940299180,3cyclictest8741-21/usr/sbin/munin21:55:200
940299180,3cyclictest16221-21fschecks_count19:20:150
940299180,17cyclictest940-21grep21:45:020
940299180,17cyclictest17032-21fschecks_time21:15:140
940299180,17cyclictest0-21swapper/023:20:150
9412991715,1cyclictest0-21swapper/220:23:282
9412991714,2cyclictest3848-21grep19:55:162
9412991714,2cyclictest30805-21ls23:35:142
9412991714,2cyclictest24071-21cat22:25:142
9412991714,2cyclictest13282-21uniq00:00:152
9412991714,2cyclictest1214-21expr23:40:132
9412991711,5cyclictest0-21swapper/219:40:132
941299170,2cyclictest8248-21ls21:00:152
941299170,2cyclictest7031-21apt-config23:50:022
941299170,2cyclictest6311-21cstates20:00:132
941299170,2cyclictest27804-21awk00:25:182
941299170,2cyclictest2530-21sh22:45:002
941299170,2cyclictest15398-21mailstats23:05:202
941299170,2cyclictest12719-21dpkg19:15:022
941299170,16cyclictest6153-21ls22:50:142
941299170,16cyclictest31095-21cat00:30:212
941299170,16cyclictest29467-21timerwakeupswit23:30:202
941299170,16cyclictest28739-21cpuspeed_turbos20:40:172
941299170,16cyclictest22615-21awk19:30:212
941299170,16cyclictest22264-21grep23:20:142
941299170,16cyclictest20263-21expr20:25:162
941299170,16cyclictest19898-21cstates23:15:162
941299170,16cyclictest19898-21cstates23:15:152
941299170,16cyclictest19106-21apt-get21:20:152
941299170,16cyclictest1716-21expr21:45:152
941299170,16cyclictest16699-21/usr/sbin/munin23:10:152
941299170,16cyclictest15654-21cstates00:05:132
941299170,16cyclictest14747-21cstates20:15:152
941299170,16cyclictest0-21swapper/220:10:142
940699172,1cyclictest0-21swapper/121:03:551
940699172,1cyclictest0-21swapper/119:55:121
9406991715,1cyclictest19488-21cpu23:15:151
9406991715,1cyclictest19488-21cpu23:15:151
9406991714,2cyclictest993-21dbus-daemon22:40:211
9406991714,2cyclictest993-21dbus-daemon20:50:211
9406991714,2cyclictest22562-21processes19:30:191
9406991714,2cyclictest16963-21sendmail_mailtr00:05:211
9406991714,2cyclictest14833-21nfsd421:10:191
9406991714,1cyclictest0-21swapper/120:06:281
940699171,15cyclictest4035-21H222:10:211
940699171,15cyclictest3985-21H222:10:211
940699171,15cyclictest30336-21expr19:45:151
940699171,15cyclictest26954-21chrt21:31:141
940699171,15cyclictest26954-21chrt21:31:131
940699171,15cyclictest0-21swapper/123:55:201
940699171,15cyclictest0-21swapper/123:45:341
940699171,15cyclictest0-21swapper/121:55:201
940699171,15cyclictest0-21swapper/121:55:201
940699170,2cyclictest29532-21tr00:30:131
940699170,2cyclictest26931-21postgres23:26:191
940699170,2cyclictest17508-21expr20:20:131
940699170,2cyclictest11471-21expr23:00:151
940699170,16cyclictest9905-21systemctl22:55:231
940699170,16cyclictest9408-21lxd23:08:501
940699170,16cyclictest6993-21awk22:50:171
940699170,16cyclictest5091-21cstates20:55:151
940699170,16cyclictest3135-21expr22:45:131
940699170,16cyclictest29716-21chrt23:32:071
940699170,16cyclictest27312-21fschecks_count19:40:161
940699170,16cyclictest26484-21munin-plugin-st00:25:001
940699170,16cyclictest26128-21ls20:35:121
940699170,16cyclictest22415-21sed20:30:021
940699170,16cyclictest22280-21uname00:15:191
940699170,16cyclictest22171-21/usr/sbin/munin23:20:131
940699170,16cyclictest19255-21uname19:25:181
940699170,16cyclictest17560-21nfsd421:15:171
940699170,16cyclictest14854-21expr20:15:151
940699170,16cyclictest14301-21switchtime00:00:221
940699170,16cyclictest13564-21timerwakeupswit20:10:231
940699170,16cyclictest1300-21lxd21:44:491
940699170,16cyclictest12236-21latency_hist22:05:011
940699170,15cyclictest29005-21nfsd421:35:191
9402991715,1cyclictest22170-21missed_timers00:15:170
9402991715,1cyclictest0-21swapper/022:30:190
9402991714,2cyclictest28631-21apache_accesses20:40:140
9402991714,2cyclictest27132-21nvmesmart_nvme020:35:180
9402991714,2cyclictest21339-21expr22:20:140
9402991714,2cyclictest18272-21/usr/sbin/munin22:15:150
9402991714,2cyclictest15292-21cut00:05:010
9402991714,2cyclictest11608-21switchtime23:55:200
9402991713,3cyclictest2872-21systemd-logind23:36:510
940299171,15cyclictest0-21swapper/020:25:150
940299170,2cyclictest8863-21expr22:55:140
940299170,2cyclictest6039-21expr22:50:130
940299170,2cyclictest30204-21/usr/sbin/munin00:30:150
940299170,2cyclictest29682-21sed19:45:020
940299170,2cyclictest17327-21grep23:10:160
940299170,2cyclictest16084-21hddtemp_smartct00:05:160
940299170,16cyclictest6780-21perf21:55:010
940299170,16cyclictest6299-21ls20:00:140
940299170,16cyclictest32709-21awk20:45:180
940299170,16cyclictest32380-21ls22:40:140
940299170,16cyclictest29754-21chrt23:32:390
940299170,16cyclictest24180-21chrt21:25:290
940299170,16cyclictest2313-21expr20:50:140
940299170,16cyclictest15544-21needreboot20:15:200
940299170,16cyclictest14832-21cat23:05:160
940299170,16cyclictest14055-21ntp_offset22:05:220
940299170,16cyclictest0-21swapper/019:35:140
9406991614,1cyclictest24462-21fschecks_time22:25:151
9406991614,1cyclictest0-21swapper/123:10:191
9406991614,1cyclictest0-21swapper/122:15:141
9406991614,1cyclictest0-21swapper/121:45:021
9406991614,1cyclictest0-21swapper/121:25:041
9406991614,1cyclictest0-21swapper/120:45:181
9406991614,1cyclictest0-21swapper/119:10:131
9406991614,1cyclictest0-21swapper/100:35:151
9406991614,1cyclictest0-21swapper/100:10:141
9406991613,2cyclictest16655-21sed22:10:171
940699160,1cyclictest0-21swapper/123:35:151
940699160,15cyclictest6096-21cpuspeed_turbos20:00:131
940699160,15cyclictest0-21swapper/122:05:201
940699160,15cyclictest0-21swapper/121:50:211
940299160,2cyclictest32507-21chrt19:50:050
940299160,15cyclictest0-21swapper/020:55:120
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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