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2026-04-21 - 03:56
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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 highest latencies:
System rackdslot1.osadl.org (updated Tue Apr 21, 2026 00:45:39)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
134491730,6ptp4l6544-21/usr/sbin/munin19:05:141
8893996534,3cyclictest25-21ksoftirqd/120:25:181
8893996232,7cyclictest25-21ksoftirqd/123:50:001
8452610,4sleep30-21swapper/321:10:163
8893996029,3cyclictest25-21ksoftirqd/121:40:001
8895995926,3cyclictest41-21ksoftirqd/321:20:013
8893995929,8cyclictest25-21ksoftirqd/123:25:271
8893995926,3cyclictest25-21ksoftirqd/119:50:061
8893995926,3cyclictest25-21ksoftirqd/119:50:061
134491590,4ptp4l0-21swapper/222:44:252
8895995825,3cyclictest41-21ksoftirqd/319:55:003
8895995825,3cyclictest41-21ksoftirqd/319:55:003
8893995830,8cyclictest25-21ksoftirqd/121:10:181
8893995826,4cyclictest25-21ksoftirqd/123:13:051
8893995824,6cyclictest25-21ksoftirqd/100:11:101
8893995824,3cyclictest25-21ksoftirqd/122:08:141
8893995729,7cyclictest25-21ksoftirqd/122:31:011
8893995727,4cyclictest25-21ksoftirqd/122:50:011
8893995727,3cyclictest25-21ksoftirqd/123:00:201
8893995726,4cyclictest25-21ksoftirqd/122:25:301
8893995723,8cyclictest25-21ksoftirqd/121:55:131
8893995723,3cyclictest25-21ksoftirqd/100:33:371
134491570,4ptp4l0-21swapper/120:10:221
8893995628,10cyclictest25-21ksoftirqd/100:35:171
8893995623,4cyclictest25-21ksoftirqd/120:57:051
134491560,4ptp4l30853-1kworker/2:2H00:20:222
134491560,4ptp4l0-21swapper/319:59:333
134491560,4ptp4l0-21swapper/122:21:001
134491560,4ptp4l0-21swapper/121:50:131
134491560,3ptp4l0-21swapper/200:15:212
8893995528,6cyclictest25-21ksoftirqd/119:11:271
8893995525,3cyclictest25-21ksoftirqd/120:17:421
8893995522,3cyclictest25-21ksoftirqd/120:36:551
8895995424,3cyclictest41-21ksoftirqd/320:05:013
8895995422,4cyclictest41-21ksoftirqd/300:21:353
8893995426,6cyclictest25-21ksoftirqd/119:28:031
8893995425,6cyclictest25-21ksoftirqd/123:30:281
8893995419,7cyclictest25-21ksoftirqd/120:45:191
134491540,4ptp4l0-21swapper/223:21:542
134491540,4ptp4l0-21swapper/219:29:412
134491540,3ptp4l889299cyclictest21:00:150
8895995323,4cyclictest41-21ksoftirqd/323:23:063
8895995321,4cyclictest41-21ksoftirqd/300:11:323
8895995320,4cyclictest41-21ksoftirqd/322:24:493
8895995320,10cyclictest41-21ksoftirqd/320:25:423
8895995319,4cyclictest41-21ksoftirqd/322:38:373
8895995319,10cyclictest41-21ksoftirqd/319:25:013
8895995319,10cyclictest41-21ksoftirqd/319:25:013
8893995328,7cyclictest25-21ksoftirqd/123:06:511
8893995327,6cyclictest25-21ksoftirqd/121:20:271
134491530,4ptp4l0-21swapper/223:33:062
134491530,4ptp4l0-21swapper/222:08:002
134491530,4ptp4l0-21swapper/200:31:302
8895995224,7cyclictest41-21ksoftirqd/319:15:153
8895995221,4cyclictest41-21ksoftirqd/320:47:333
889399524,6cyclictest25-21ksoftirqd/121:15:201
8893995225,6cyclictest25-21ksoftirqd/119:58:201
8893995222,3cyclictest25-21ksoftirqd/119:30:211
134491520,4ptp4l0-21swapper/223:38:382
8895995124,4cyclictest41-21ksoftirqd/319:36:513
8895995122,3cyclictest41-21ksoftirqd/323:25:233
8895995120,4cyclictest41-21ksoftirqd/320:52:303
8895995117,7cyclictest41-21ksoftirqd/322:35:003
8893995126,7cyclictest25-21ksoftirqd/119:45:111
8893995126,6cyclictest25-21ksoftirqd/122:38:381
8893995125,6cyclictest25-21ksoftirqd/122:55:121
8893995124,3cyclictest25-21ksoftirqd/121:25:281
8893995118,7cyclictest25-21ksoftirqd/121:05:201
8893995117,8cyclictest25-21ksoftirqd/100:05:221
134491510,4ptp4l0-21swapper/219:37:562
134491510,4ptp4l0-21swapper/120:54:161
134491510,4ptp4l0-21swapper/120:33:431
889599508,7cyclictest41-21ksoftirqd/320:35:253
8895995021,9cyclictest41-21ksoftirqd/323:50:223
8895995019,7cyclictest41-21ksoftirqd/323:00:013
8895995019,4cyclictest41-21ksoftirqd/323:40:023
8895995018,8cyclictest41-21ksoftirqd/322:52:193
889399505,2cyclictest25-21ksoftirqd/122:15:221
889399503,3cyclictest25-21ksoftirqd/119:35:161
8893995023,6cyclictest25-21ksoftirqd/123:20:431
8893995022,4cyclictest25-21ksoftirqd/123:40:001
8893995017,8cyclictest25-21ksoftirqd/123:50:281
8893995015,7cyclictest25-21ksoftirqd/122:10:251
8893995012,8cyclictest25-21ksoftirqd/122:40:281
134491500,4ptp4l0-21swapper/220:00:492
134491500,3ptp4l10827-21latency21:30:211
134491500,10ptp4l6559-21dpkg19:05:120
889599492,2cyclictest121rcu_preempt22:48:593
8895994922,6cyclictest41-21ksoftirqd/320:10:253
8895994920,4cyclictest41-21ksoftirqd/321:26:443
8895994917,8cyclictest41-21ksoftirqd/323:45:123
8895994916,8cyclictest41-21ksoftirqd/300:00:303
889599491,3cyclictest121rcu_preempt22:18:593
889599491,3cyclictest121rcu_preempt21:21:593
8895994912,7cyclictest41-21ksoftirqd/319:15:003
889399494,3cyclictest25-21ksoftirqd/119:40:251
8893994923,3cyclictest25-21ksoftirqd/121:40:231
8893994918,7cyclictest25-21ksoftirqd/123:55:171
8893994918,7cyclictest25-21ksoftirqd/122:00:221
134491490,4ptp4l0-21swapper/321:52:233
889599487,9cyclictest41-21ksoftirqd/321:57:003
889599482,7cyclictest121rcu_preempt00:39:583
8895994822,7cyclictest41-21ksoftirqd/319:25:203
8895994820,3cyclictest41-21ksoftirqd/321:30:233
8895994819,3cyclictest41-21ksoftirqd/321:38:313
8895994818,6cyclictest41-21ksoftirqd/323:00:253
8895994817,4cyclictest41-21ksoftirqd/323:16:083
8895994817,4cyclictest41-21ksoftirqd/320:33:283
889599481,2cyclictest121rcu_preempt23:30:583
8893994815,6cyclictest25-21ksoftirqd/122:50:191
8893994814,7cyclictest25-21ksoftirqd/119:20:191
8893994814,7cyclictest25-21ksoftirqd/119:20:191
889399481,3cyclictest121rcu_preempt20:41:131
134491480,3ptp4l121rcu_preempt22:25:110
134491480,14ptp4l0-21swapper/222:50:002
889599472,2cyclictest121rcu_preempt20:20:593
8895994719,8cyclictest41-21ksoftirqd/321:40:293
8895994714,7cyclictest41-21ksoftirqd/322:00:143
889599471,2cyclictest121rcu_preempt21:45:593
889599471,2cyclictest121rcu_preempt20:56:593
8893994723,3cyclictest25-21ksoftirqd/100:20:201
208102471,2sleep2121rcu_preempt20:45:002
134491470,3ptp4l0-21swapper/223:44:272
134491470,3ptp4l0-21swapper/120:22:381
134491470,12ptp4l0-21swapper/219:40:282
8895994619,6cyclictest41-21ksoftirqd/323:35:173
889599461,2cyclictest121rcu_preempt20:44:593
889399465,5cyclictest25-21ksoftirqd/121:47:001
889399464,2cyclictest25-21ksoftirqd/120:04:061
134491460,7ptp4l19408-21mv00:09:300
134491460,5ptp4l0-21swapper/020:25:170
134491460,3ptp4l0-21swapper/021:19:580
134491460,3ptp4l0-21swapper/020:58:210
134491460,10ptp4l0-21swapper/023:28:580
8895994515,4cyclictest41-21ksoftirqd/319:35:013
889599450,2cyclictest121rcu_preempt23:56:583
889399453,2cyclictest25-21ksoftirqd/121:01:191
889399452,3cyclictest121rcu_preempt00:29:511
8893994519,6cyclictest25-21ksoftirqd/123:17:571
889399450,2cyclictest25-21ksoftirqd/120:05:151
134491450,9ptp4l0-21swapper/221:36:552
134491450,4ptp4l0-21swapper/000:35:140
134491450,10ptp4l0-21swapper/223:08:512
889599448,4cyclictest41-21ksoftirqd/300:30:223
889599446,8cyclictest41-21ksoftirqd/322:13:213
8895994417,7cyclictest41-21ksoftirqd/321:06:103
8893994418,4cyclictest25-21ksoftirqd/123:40:131
134691440,11getstats0-21swapper/022:31:320
134691440,10getstats0-21swapper/022:23:500
134491440,9ptp4l0-21swapper/223:00:342
134491440,9ptp4l0-21swapper/222:49:242
134491440,9ptp4l0-21swapper/221:58:192
134491440,4ptp4l27553-21apt-get19:50:132
134491440,4ptp4l27553-21apt-get19:50:132
134491440,4ptp4l0-21swapper/221:20:292
134491440,10ptp4l0-21swapper/219:33:522
8895994326,9cyclictest41-21ksoftirqd/300:07:373
889599431,2cyclictest121rcu_preempt23:07:323
889599430,2cyclictest121rcu_preempt22:05:083
8893994337,3cyclictest25-21ksoftirqd/119:20:001
889399430,6cyclictest25-21ksoftirqd/100:00:301
134691430,10getstats0-21swapper/000:18:240
134491430,9ptp4l0-21swapper/221:44:302
134491430,9ptp4l0-21swapper/221:32:452
134491430,9ptp4l0-21swapper/221:27:352
134491430,9ptp4l0-21swapper/219:58:052
134491430,9ptp4l0-21swapper/219:18:442
134491430,9ptp4l0-21swapper/219:12:422
134491430,9ptp4l0-21swapper/021:09:410
134491430,4ptp4l24082-21ntp_states19:40:230
134491430,3ptp4l0-21swapper/020:51:120
134491430,10ptp4l0-21swapper/219:23:252
134491430,10ptp4l0-21swapper/219:23:242
134491430,10ptp4l0-21swapper/022:38:220
889599429,7cyclictest41-21ksoftirqd/322:40:153
8895994211,3cyclictest41-21ksoftirqd/300:25:463
889599420,3cyclictest121rcu_preempt00:15:153
8893994237,3cyclictest25-21ksoftirqd/100:20:011
134691420,11getstats0-21swapper/022:44:550
134691420,10getstats0-21swapper/021:31:530
134691420,10getstats0-21swapper/020:41:420
134691420,10getstats0-21swapper/019:52:010
134691420,10getstats0-21swapper/019:52:010
134691420,10getstats0-21swapper/019:38:540
134691420,10getstats0-21swapper/000:31:070
134691420,10getstats0-21swapper/000:03:220
134491420,9ptp4l0-21swapper/220:07:452
134491420,9ptp4l0-21swapper/021:43:110
134491420,5ptp4l0-21swapper/200:00:152
134491420,5ptp4l0-21swapper/021:46:590
134491420,4ptp4l7021-21apt-get20:15:120
134491420,4ptp4l5320-21apt-get21:20:130
134491420,4ptp4l2734-21df_inode20:05:150
134491420,3ptp4l28987-21apt-get23:20:120
889599416,4cyclictest41-21ksoftirqd/319:45:163
8895994132,3cyclictest41-21ksoftirqd/319:40:283
8895994115,4cyclictest41-21ksoftirqd/321:00:113
889599410,2cyclictest121rcu_preempt22:25:193
134691410,10getstats0-21swapper/023:58:540
134691410,10getstats0-21swapper/019:48:460
134691410,10getstats0-21swapper/019:18:420
134491410,9ptp4l0-21swapper/221:03:582
134491410,8ptp4l0-21swapper/222:39:282
134491410,8ptp4l0-21swapper/219:49:572
134491410,8ptp4l0-21swapper/022:56:260
134491410,6ptp4l8358-21df_abs23:45:140
134491410,5ptp4l1381-21df23:30:140
134491410,5ptp4l0-21swapper/023:50:200
134491410,5ptp4l0-21swapper/000:20:240
134491410,4ptp4l0-21swapper/023:07:500
134491410,4ptp4l0-21swapper/020:35:190
134491410,4ptp4l0-21swapper/020:20:230
134491410,3ptp4l772-21meminfo20:00:190
134491410,3ptp4l20243-21ntp_states21:50:230
134491410,3ptp4l12383-21apt-get22:45:100
134491410,10ptp4l0-21swapper/220:24:272
8895994035,3cyclictest41-21ksoftirqd/323:10:153
889599402,6cyclictest121rcu_preempt20:19:053
134491400,5ptp4l0-21swapper/221:10:592
134491400,5ptp4l0-21swapper/023:00:110
134491400,4ptp4l31613-21users19:55:270
134491400,4ptp4l30726-21ls22:15:002
134491400,4ptp4l12437-21/usr/sbin/munin21:35:140
134491400,4ptp4l0-21swapper/223:45:072
134491400,4ptp4l0-21swapper/222:58:422
134491400,4ptp4l0-21swapper/222:24:062
134491400,4ptp4l0-21swapper/220:49:312
134491400,4ptp4l0-21swapper/200:35:212
134491400,4ptp4l0-21swapper/200:12:502
134491400,4ptp4l0-21swapper/023:10:200
134491400,4ptp4l0-21swapper/022:15:400
134491400,4ptp4l0-21swapper/022:05:430
134491400,3ptp4l29450-21irqstats22:10:180
134491400,3ptp4l24259-21df_inode22:00:140
134491400,3ptp4l20435-21iostat_ios00:10:180
8895993934,3cyclictest41-21ksoftirqd/320:05:203
134491390,5ptp4l0-21swapper/222:29:082
134491390,5ptp4l0-21swapper/019:28:030
134491390,4ptp4l0-21swapper/223:50:032
134491390,4ptp4l0-21swapper/223:15:342
134491390,4ptp4l0-21swapper/223:10:312
134491390,4ptp4l0-21swapper/222:32:062
134491390,4ptp4l0-21swapper/222:01:442
134491390,4ptp4l0-21swapper/221:50:502
134491390,4ptp4l0-21swapper/221:49:032
134491390,4ptp4l0-21swapper/221:16:492
134491390,4ptp4l0-21swapper/221:05:592
134491390,4ptp4l0-21swapper/220:56:152
134491390,4ptp4l0-21swapper/220:53:392
134491390,4ptp4l0-21swapper/220:35:062
134491390,4ptp4l0-21swapper/220:30:472
134491390,4ptp4l0-21swapper/220:29:052
134491390,4ptp4l0-21swapper/220:15:392
134491390,4ptp4l0-21swapper/220:10:592
134491390,4ptp4l0-21swapper/023:37:260
134491390,4ptp4l0-21swapper/022:52:300
134491390,4ptp4l0-21swapper/021:55:020
134491390,4ptp4l0-21swapper/021:11:090
134491390,4ptp4l0-21swapper/019:30:240
134491390,4ptp4l0-21swapper/019:10:100
134491390,4ptp4l0-21swapper/000:27:530
134491390,3ptp4l8459-21irqstats21:25:200
134491390,3ptp4l13177-21hddtemp_smartct23:55:162
134491390,3ptp4l0-21swapper/222:15:532
134491390,3ptp4l0-21swapper/023:40:190
134491390,3ptp4l0-21swapper/023:15:200
134491390,3ptp4l0-21swapper/020:45:200
134491390,3ptp4l0-21swapper/020:30:300
134491390,3ptp4l0-21swapper/019:20:330
134491390,3ptp4l0-21swapper/019:20:330
134491380,4ptp4l0-21swapper/223:26:322
134491380,4ptp4l0-21swapper/200:27:512
134491380,4ptp4l0-21swapper/200:05:122
134491380,4ptp4l0-21swapper/020:10:040
65432245,11sleep30-21swapper/319:05:133
83502152,9sleep20-21swapper/219:06:522
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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