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2026-08-10 - 14:28
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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 Mon Aug 10, 2026 00:45:57)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1048099251,6cyclictest32455-21grep20:45:192
1047999247,16cyclictest28931-21latency23:30:181
10480992213,0cyclictest0-21swapper/222:25:162
1047999220,17cyclictest0-21swapper/121:30:201
10479992115,3cyclictest0-21swapper/122:13:081
1047899210,5cyclictest0-21swapper/023:30:010
1048099202,17cyclictest5915-21expr22:50:132
10480992020,0cyclictest0-21swapper/200:20:002
10480992016,1cyclictest0-21swapper/221:50:112
1048099200,2cyclictest3976-21H222:10:212
10480991917,1cyclictest0-21swapper/220:15:182
10480991917,1cyclictest0-21swapper/219:40:282
10480991916,2cyclictest26881-21/usr/sbin/munin00:25:222
10480991915,3cyclictest0-21swapper/222:36:172
10480991915,3cyclictest0-21swapper/221:25:182
10480991913,3cyclictest0-21swapper/220:25:182
1048099190,18cyclictest0-21swapper/223:39:042
1048099190,16cyclictest3981-21H222:10:212
1047999192,2cyclictest28287-21date20:40:001
1047999192,1cyclictest0-21swapper/120:25:201
10479991917,1cyclictest0-21swapper/121:42:571
1047999190,2cyclictest3979-21H222:10:211
1047999190,18cyclictest870-21systemd-logind00:06:521
1047999190,17cyclictest4035-21H222:10:211
1047999190,16cyclictest3983-21H222:10:211
1047899192,3cyclictest0-21swapper/022:55:150
1047899192,16cyclictest21235-21https00:15:010
10478991917,1cyclictest0-21swapper/021:40:230
1047899190,18cyclictest23093-21grep23:20:150
1047899190,18cyclictest0-21swapper/021:01:400
1047899190,16cyclictest3989-21H222:10:210
1047899190,16cyclictest3987-21H222:10:210
1048099182,1cyclictest244482chrt23:20:342
1048099182,1cyclictest0-21swapper/221:05:132
1048099182,15cyclictest22438-21cat22:20:212
10480991816,1cyclictest29403-21timerwakeupswit21:35:202
10480991816,1cyclictest28-21ksoftirqd/222:49:242
10480991816,1cyclictest0-21swapper/221:18:202
10480991815,2cyclictest17230-21ls19:20:182
10480991814,3cyclictest3979-21H222:10:212
10480991814,3cyclictest0-21swapper/221:59:082
10480991811,3cyclictest0-21swapper/223:45:012
1048099180,2cyclictest3989-21H222:10:212
1048099180,2cyclictest3983-21H222:10:212
1048099180,2cyclictest3983-21H222:10:212
1048099180,17cyclictest9404-21/usr/sbin/munin22:00:172
1048099180,17cyclictest4099-21H222:10:212
1048099180,17cyclictest3976-21H222:10:212
1048099180,17cyclictest1078-21polkitd23:10:202
1047999182,15cyclictest21-21ksoftirqd/123:27:311
1047999182,15cyclictest21-21ksoftirqd/122:00:171
1047999182,15cyclictest21-21ksoftirqd/119:46:101
10479991815,1cyclictest0-21swapper/121:20:161
10479991814,3cyclictest3983-21H222:10:211
10479991814,3cyclictest1521-21lxd19:14:491
1047999181,16cyclictest8797-21munin-plugin-st20:05:001
1047999181,16cyclictest22959-21sendmail_mailqu00:15:221
1047999181,16cyclictest13718-21readlink22:05:221
1047999180,2cyclictest4099-21H222:10:211
1047999180,2cyclictest4035-21H222:10:211
1047999180,2cyclictest3989-21H222:10:211
1047999180,2cyclictest3987-21H222:10:211
1047999180,17cyclictest4099-21H222:10:211
1047999180,17cyclictest3991-21H222:10:211
10478991816,1cyclictest0-21swapper/022:45:160
10478991815,2cyclictest24139-21chrt21:26:350
10478991815,2cyclictest14226-21cron20:15:010
1047899181,2cyclictest26589-21expr22:30:110
1047899181,16cyclictest3046-21chrt21:47:010
1047899181,16cyclictest20839-21ps21:20:200
1047899180,2cyclictest3976-21H222:10:210
1047899180,2cyclictest0-21swapper/021:19:080
1047899180,17cyclictest11808-21cut21:05:170
1047899180,15cyclictest3987-21H222:10:210
10480991715,1cyclictest0-21swapper/219:37:102
10480991714,2cyclictest4947-21ntpq19:55:202
10480991714,2cyclictest26003-21sort00:20:202
10480991714,2cyclictest26003-21sort00:20:192
10480991714,2cyclictest25740-21cstates23:25:132
10480991714,2cyclictest24798-21chrt21:30:052
10480991714,2cyclictest23961-21ls20:30:172
10480991714,2cyclictest17764-21/usr/sbin/munin22:15:142
10480991714,2cyclictest1652-21sed00:35:192
10480991714,2cyclictest15827-21cstates00:05:172
10480991714,2cyclictest10883-21cpuspeed_turbos19:10:142
1048099171,15cyclictest30572-21grep21:40:152
1048099171,15cyclictest12590-21nfsd423:00:162
1048099170,2cyclictest3991-21H222:10:212
1048099170,2cyclictest3985-21H222:10:212
1048099170,2cyclictest32524-21anvil21:45:132
1048099170,2cyclictest26114-21gpgv22:30:022
1048099170,2cyclictest15235-21tr22:10:132
1048099170,1cyclictest0-21swapper/222:06:452
1048099170,16cyclictest7969-21cstates21:00:152
1048099170,16cyclictest4099-21H222:10:212
1048099170,16cyclictest3981-21H222:10:212
1048099170,16cyclictest30337-21ls19:45:142
1048099170,16cyclictest29528-21latency20:40:192
1048099170,16cyclictest26298-21hddtemp_smartct20:35:162
1048099170,16cyclictest2277-21sed19:50:232
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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