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2025-12-07 - 09:12
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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 rackdslot1.osadl.org (updated Sun Dec 07, 2025 00:45:34)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1175621440,6sleep2124299cyclictest23:00:012
130062810,5sleep20-21swapper/221:50:292
2847191640,5ptp4l0-21swapper/223:45:132
124099638,16cyclictest19321-21cat00:25:000
2847191620,3ptp4l19867-21apt-get19:50:143
124099617,17cyclictest17299-21gzip20:50:270
2847191600,4ptp4l0-21swapper/300:11:013
2847191600,3ptp4l0-21swapper/321:18:413
2847191600,3ptp4l0-21swapper/219:40:202
31952590,4sleep30-21swapper/322:40:203
2847191590,3ptp4l0-21swapper/219:20:182
124199594,16cyclictest28098-21/usr/sbin/munin21:15:171
1240995915,8cyclictest1378-21cron20:20:000
1240995915,8cyclictest1378-21cron20:20:000
2847191580,3ptp4l0-21swapper/221:32:292
2847191580,3ptp4l0-21swapper/219:50:512
2847191570,4ptp4l0-21swapper/322:35:183
2847191570,4ptp4l0-21swapper/321:40:043
2847191570,3ptp4l0-21swapper/319:18:093
124099577,11cyclictest24381-21cat00:35:130
1240995710,11cyclictest26631-21seq20:03:070
105012570,3sleep00-21swapper/021:45:250
2847191560,4ptp4l0-21swapper/322:29:383
2847191560,4ptp4l0-21swapper/320:51:383
2847191560,4ptp4l0-21swapper/320:05:083
2847191560,4ptp4l0-21swapper/222:52:292
2847191560,3ptp4l0-21swapper/321:08:083
2847191560,3ptp4l0-21swapper/319:23:183
2847191560,3ptp4l0-21swapper/300:30:283
2847191550,5ptp4l0-21swapper/300:08:433
2847191550,4ptp4l0-21swapper/321:30:183
2847191550,4ptp4l0-21swapper/320:34:303
2847191550,4ptp4l0-21swapper/320:22:003
2847191550,4ptp4l0-21swapper/319:32:543
2847191550,4ptp4l0-21swapper/319:26:033
2847191550,4ptp4l0-21swapper/223:33:032
2847191550,4ptp4l0-21swapper/221:37:502
2847191550,4ptp4l0-21swapper/221:17:142
2847191550,3ptp4l0-21swapper/322:20:553
2847191550,3ptp4l0-21swapper/319:58:593
2847191550,3ptp4l0-21swapper/222:00:032
2847191550,3ptp4l0-21swapper/200:39:462
124199559,16cyclictest29975-21chrt21:20:071
124199559,15cyclictest17202-21chrt19:43:421
124099558,10cyclictest0-21swapper/022:38:360
2847191540,4ptp4l0-21swapper/322:47:203
2847191540,4ptp4l0-21swapper/300:21:593
2847191540,4ptp4l0-21swapper/300:03:483
124199549,12cyclictest32422-21taskset23:43:001
124199548,11cyclictest1299-21runrttasks23:22:371
124199548,11cyclictest1299-21runrttasks21:12:311
124199547,13cyclictest21913-21ntpq22:10:271
124199547,10cyclictest1299-21runrttasks20:39:051
1241995410,11cyclictest21918-21chrt19:54:581
1240995410,12cyclictest26492-21needreboot22:20:220
2847191530,5ptp4l0-21swapper/323:14:363
2847191530,4ptp4l0-21swapper/119:09:231
2847191530,3ptp4l0-21swapper/322:17:043
2847191530,3ptp4l0-21swapper/320:28:313
258652530,4sleep2124299cyclictest21:10:202
124199536,12cyclictest19269-21ls00:25:001
1241995310,15cyclictest1017-21chrt21:25:241
124099537,13cyclictest28439-21irqrtprio22:25:200
1240995310,13cyclictest1299-21runrttasks20:57:470
2847191520,4ptp4l0-21swapper/323:05:403
2847191520,4ptp4l0-21swapper/323:03:043
2847191520,4ptp4l0-21swapper/321:49:453
2847191520,4ptp4l0-21swapper/300:15:403
2847191520,4ptp4l0-21swapper/221:45:182
2847191520,12ptp4l5840-21cat19:20:002
124199529,16cyclictest9224-21taskset22:53:171
124199529,15cyclictest10068-21chrt19:26:251
124199528,11cyclictest18373-21chrt23:11:581
124199527,9cyclictest0-21swapper/121:47:211
124099529,12cyclictest1299-21runrttasks23:58:040
124099529,11cyclictest1299-21runrttasks21:54:560
124099529,10cyclictest0-21swapper/019:55:180
124099528,14cyclictest25569-21df_abs21:10:160
1240995210,11cyclictest1299-21runrttasks23:23:020
2847191510,4ptp4l0-21swapper/321:52:133
2847191510,4ptp4l0-21swapper/320:56:263
2847191510,4ptp4l0-21swapper/222:44:372
2847191510,4ptp4l0-21swapper/200:19:332
2847191510,3ptp4l0-21swapper/320:39:533
2847191510,3ptp4l0-21swapper/319:12:013
2847191510,3ptp4l0-21swapper/220:04:532
2847191510,12ptp4l0-21swapper/323:19:463
124199518,10cyclictest1299-21runrttasks21:50:501
124099519,11cyclictest0-21swapper/000:08:380
124099518,39cyclictest0-21swapper/020:25:250
124099517,16cyclictest0-21swapper/019:53:160
124099517,15cyclictest10598-21/usr/sbin/munin19:30:240
124099516,17cyclictest0-21swapper/023:41:060
1240995111,11cyclictest6306-21seq21:35:460
2847191500,3ptp4l0-21swapper/320:01:223
1242995016,6cyclictest33-21ksoftirqd/221:45:002
124199508,11cyclictest1299-21runrttasks20:21:481
124199504,11cyclictest7931-21cat21:40:221
124199503,12cyclictest24398-21sed21:05:271
1241995010,18cyclictest31324-21chrt20:13:141
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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