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2026-09-22 - 10:38
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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 Sep 22, 2026 00:45:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1818021500,6sleep02848899cyclictest22:15:190
1879621460,3sleep32849199cyclictest23:25:233
134491790,4ptp4l0-21swapper/220:32:472
2848999709,59cyclictest17973-21kworker/1:022:45:491
231622620,3sleep00-21swapper/023:35:190
134491610,4ptp4l0-21swapper/300:19:183
134491600,5ptp4l0-21swapper/223:35:122
134491600,3ptp4l3594-21apt-get22:55:142
134491590,4ptp4l0-21swapper/200:14:182
134491580,4ptp4l0-21swapper/220:05:222
134491570,4ptp4l0-21swapper/320:46:303
134491570,4ptp4l0-21swapper/219:38:112
134491570,3ptp4l0-21swapper/223:17:442
2848899566,10cyclictest2318-21gnome-shell23:10:240
134491560,4ptp4l0-21swapper/119:05:191
134491560,3ptp4l0-21swapper/223:00:242
134491560,2ptp4l0-21swapper/223:20:102
134491560,2ptp4l0-21swapper/223:20:092
2848899554,19cyclictest21052-21timerwakeupswit20:00:310
134491550,3ptp4l0-21swapper/222:50:252
134491550,3ptp4l0-21swapper/222:50:252
134491550,3ptp4l0-21swapper/123:18:421
2848999541,11cyclictest81642chrt00:13:191
28488995410,10cyclictest29017-21taskset22:40:010
134491540,4ptp4l0-21swapper/322:34:153
134491540,3ptp4l404-21taskset19:19:573
134491540,3ptp4l0-21swapper/222:21:572
134491540,3ptp4l0-21swapper/222:14:292
134491540,3ptp4l0-21swapper/200:01:172
2848899535,6cyclictest134491ptp4l23:40:180
2848899535,11cyclictest0-21swapper/020:25:480
134491530,4ptp4l0-21swapper/319:44:293
134491530,4ptp4l0-21swapper/300:09:333
134491530,4ptp4l0-21swapper/222:09:442
134491530,4ptp4l0-21swapper/022:23:030
134491530,3ptp4l0-21swapper/320:55:513
134491530,3ptp4l0-21swapper/221:42:452
2848999527,17cyclictest17478-21tr21:05:131
2848999526,6cyclictest0-21swapper/119:25:031
2848899527,14cyclictest26891-21diskstats21:25:140
134491520,9ptp4l0-21swapper/223:45:142
134491520,5ptp4l0-21swapper/321:58:303
134491520,5ptp4l0-21swapper/319:06:253
134491520,4ptp4l0-21swapper/221:25:492
134491520,4ptp4l0-21swapper/221:15:592
134491520,4ptp4l0-21swapper/221:14:492
134491520,4ptp4l0-21swapper/221:14:492
134491520,4ptp4l0-21swapper/220:25:152
134491520,4ptp4l0-21swapper/219:15:172
134491520,3ptp4l0-21swapper/220:45:162
134491520,10ptp4l26455-21df_inode19:05:140
2848999518,13cyclictest0-21swapper/122:40:171
2848899519,15cyclictest9942-21apt-get20:50:020
2848899519,11cyclictest1317-21runrttasks00:12:370
2848899517,10cyclictest29938-21needreboot21:30:270
2848899515,18cyclictest0-21swapper/020:14:440
2848899515,18cyclictest0-21swapper/020:14:440
28488995110,15cyclictest14684-21apt-config19:50:010
134491510,5ptp4l0-21swapper/219:06:422
134491510,4ptp4l0-21swapper/221:03:172
134491510,4ptp4l0-21swapper/200:30:332
134491510,3ptp4l0-21swapper/222:02:112
134491510,3ptp4l0-21swapper/220:41:322
134491510,3ptp4l0-21swapper/220:41:322
134491510,10ptp4l0-21swapper/321:28:493
2848999507,6cyclictest0-21swapper/123:05:201
2848999507,11cyclictest0-21swapper/120:25:251
2848999506,7cyclictest0-21swapper/122:07:481
2848999506,6cyclictest0-21swapper/123:10:271
2848899508,7cyclictest714-21users23:55:270
2848899508,7cyclictest714-21users23:55:270
134491500,4ptp4l0-21swapper/322:11:543
134491500,4ptp4l0-21swapper/319:29:373
134491500,3ptp4l0-21swapper/220:55:282
2848999492,6cyclictest25-21ksoftirqd/100:30:191
2848899495,17cyclictest0-21swapper/022:38:100
2848899495,10cyclictest0-21swapper/019:10:220
2848899494,13cyclictest18511-21sshd00:35:170
134491490,4ptp4l401ktimersoftd/323:50:143
134491490,4ptp4l0-21swapper/223:11:192
134491490,4ptp4l0-21swapper/219:30:492
134491490,4ptp4l0-21swapper/023:30:360
134491490,3ptp4l0-21swapper/219:27:052
134491490,3ptp4l0-21swapper/200:08:172
134491490,2ptp4l0-21swapper/319:50:473
134491490,12ptp4l0-21swapper/219:48:112
2848999488,7cyclictest0-21swapper/122:00:261
2848999487,7cyclictest0-21swapper/121:55:201
2848899486,7cyclictest9369-21ntp_states21:55:240
2848899486,17cyclictest0-21swapper/020:19:090
134491480,8ptp4l0-21swapper/219:51:522
134491480,5ptp4l0-21swapper/322:45:273
134491480,4ptp4l0-21swapper/320:51:183
134491480,4ptp4l0-21swapper/223:25:452
134491480,3ptp4l0-21swapper/319:20:243
134491480,3ptp4l0-21swapper/221:35:062
2848899476,15cyclictest0-21swapper/020:46:290
2848899475,17cyclictest0-21swapper/019:24:060
134491470,4ptp4l2849199cyclictest19:34:163
134491470,4ptp4l0-21swapper/322:15:493
134491470,4ptp4l0-21swapper/321:04:573
134491470,4ptp4l0-21swapper/221:57:172
134491470,4ptp4l0-21swapper/220:11:152
134491470,4ptp4l0-21swapper/220:11:152
134491470,3ptp4l0-21swapper/221:48:472
134491470,3ptp4l0-21swapper/220:18:492
134491470,11ptp4l0-21swapper/222:42:262
2848999467,6cyclictest0-21swapper/119:30:161
28489994639,5cyclictest0-21swapper/119:45:131
134491460,4ptp4l2849199cyclictest21:18:573
134491460,4ptp4l0-21swapper/220:53:252
134491460,4ptp4l0-21swapper/219:10:082
134491460,4ptp4l0-21swapper/200:27:582
134491460,3ptp4l0-21swapper/222:15:212
134491460,3ptp4l0-21swapper/221:33:542
2848999454,10cyclictest5321-21chrt22:56:001
2848899455,9cyclictest302-21ssh22:45:280
2848899453,9cyclictest28365-21timerandwakeup23:45:270
134491450,5ptp4l121rcu_preempt19:12:333
134491450,5ptp4l10869-21apt-get00:20:130
134491450,3ptp4l0-21swapper/320:28:273
134491450,3ptp4l0-21swapper/319:56:473
134491450,3ptp4l0-21swapper/221:50:192
134491450,3ptp4l0-21swapper/219:24:212
134491450,2ptp4l121rcu_preempt19:37:033
2848999445,8cyclictest0-21swapper/119:40:231
2848999445,6cyclictest0-21swapper/119:35:241
134491440,6ptp4l0-21swapper/223:05:512
134491440,4ptp4l6257-21apt-get00:10:153
134491440,4ptp4l0-21swapper/320:43:573
134491440,4ptp4l0-21swapper/320:43:573
134491440,4ptp4l0-21swapper/320:01:433
134491440,3ptp4l0-21swapper/320:39:053
134491440,3ptp4l0-21swapper/222:45:262
134491440,3ptp4l0-21swapper/221:20:332
134491440,3ptp4l0-21swapper/220:38:252
134491440,2ptp4l121rcu_preempt23:08:523
134491440,2ptp4l0-21swapper/222:35:262
134491440,12ptp4l0-21swapper/322:05:183
2848999436,11cyclictest0-21swapper/121:25:151
2848999435,16cyclictest19819-21chrt00:37:221
2848999434,11cyclictest15213-21chrt00:27:231
134491430,9ptp4l0-21swapper/321:13:023
134491430,9ptp4l0-21swapper/321:13:023
134491430,9ptp4l0-21swapper/021:48:500
134491430,8ptp4l0-21swapper/223:30:342
134491430,4ptp4l12802-21apt-get23:15:143
134491430,4ptp4l0-21swapper/323:20:023
134491430,4ptp4l0-21swapper/323:20:023
134491430,3ptp4l0-21swapper/223:50:292
134491430,3ptp4l0-21swapper/119:53:201
2848999426,6cyclictest0-21swapper/100:05:431
2848999425,6cyclictest6458-21cat23:00:161
2848999424,6cyclictest0-21swapper/122:35:401
2848899424,11cyclictest0-21swapper/021:05:480
134491420,9ptp4l0-21swapper/023:25:310
134491420,9ptp4l0-21swapper/000:28:560
134491420,8ptp4l0-21swapper/019:44:230
134491420,5ptp4l23243-21ntp_states22:25:233
134491420,5ptp4l15454-21hddtemp_smartct21:00:180
134491420,5ptp4l0-21swapper/322:40:193
134491420,4ptp4l20240-21iostat_ios21:10:190
134491420,4ptp4l20240-21iostat_ios21:10:190
134491420,4ptp4l0-21swapper/300:22:263
134491420,4ptp4l0-21swapper/219:59:152
134491420,3ptp4l0-21swapper/221:08:512
2848999416,13cyclictest0-21swapper/123:41:191
2848999415,16cyclictest17047-21chrt23:23:331
2848999415,16cyclictest17047-21chrt23:23:331
2848999414,3cyclictest134491ptp4l20:40:141
2848999414,3cyclictest134491ptp4l20:40:141
2848899415,10cyclictest0-21swapper/022:10:200
2848899414,10cyclictest0-21swapper/023:17:000
2848899413,11cyclictest3668-21latency_hist00:05:000
134491410,5ptp4l0-21swapper/323:00:143
134491410,5ptp4l0-21swapper/021:15:140
134491410,5ptp4l0-21swapper/020:20:150
134491410,5ptp4l0-21swapper/019:15:250
134491410,4ptp4l30940-21apt-get21:35:023
134491410,4ptp4l23382-21ntp_states23:35:213
134491410,4ptp4l0-21swapper/300:30:313
134491410,4ptp4l0-21swapper/021:44:590
134491410,3ptp4l905-21apt-get20:30:133
134491410,3ptp4l8552-21apt-get00:15:132
134491410,3ptp4l26404-21apt-get20:15:123
134491410,3ptp4l0-21swapper/323:30:283
2848999400,11cyclictest0-21swapper/119:12:381
134491400,9ptp4l0-21swapper/020:06:380
134491400,6ptp4l20318-21irqrtprio21:10:201
134491400,6ptp4l20318-21irqrtprio21:10:201
134491400,6ptp4l0-21swapper/321:23:233
134491400,5ptp4l0-21swapper/321:45:213
134491400,5ptp4l0-21swapper/320:12:273
134491400,5ptp4l0-21swapper/320:12:273
134491400,5ptp4l0-21swapper/320:05:133
134491400,5ptp4l0-21swapper/319:45:163
134491400,5ptp4l0-21swapper/220:00:162
134491400,5ptp4l0-21swapper/121:50:161
134491400,5ptp4l0-21swapper/020:44:570
134491400,5ptp4l0-21swapper/020:44:570
134491400,4ptp4l9121-21iostat_ios00:15:190
134491400,4ptp4l8632-21meminfo19:35:210
134491400,4ptp4l31485-21apt-get23:55:102
134491400,4ptp4l31485-21apt-get23:55:102
134491400,4ptp4l29679-21meminfo20:20:203
134491400,4ptp4l2256-21irqstats00:00:201
134491400,4ptp4l16070-21memory23:20:220
134491400,4ptp4l16070-21memory23:20:210
134491400,4ptp4l10996-21hddtemp_smartct22:00:173
134491400,4ptp4l0-21swapper/323:45:273
134491400,4ptp4l0-21swapper/321:05:233
134491400,4ptp4l0-21swapper/121:22:541
134491400,4ptp4l0-21swapper/120:00:211
134491400,4ptp4l0-21swapper/023:50:130
134491400,4ptp4l0-21swapper/022:34:340
134491400,4ptp4l0-21swapper/022:07:030
134491400,4ptp4l0-21swapper/022:04:010
134491400,4ptp4l0-21swapper/021:52:580
134491400,4ptp4l0-21swapper/020:36:340
134491400,4ptp4l0-21swapper/019:55:210
134491400,4ptp4l0-21swapper/000:34:230
134491400,4ptp4l0-21swapper/000:08:540
134491400,3ptp4l7075-21ntp_states21:50:223
134491400,3ptp4l6508-21ntp_states19:30:250
134491400,3ptp4l30297-21ls20:20:272
134491400,3ptp4l0-21swapper/300:35:393
2848899398,18cyclictest2045-21ntpq20:30:240
134491390,4ptp4l17720-21kworker/3:221:42:513
134491390,4ptp4l0-21swapper/323:40:273
134491390,4ptp4l0-21swapper/322:50:113
134491390,4ptp4l0-21swapper/322:50:113
134491390,4ptp4l0-21swapper/322:24:113
134491390,4ptp4l0-21swapper/300:00:303
134491390,4ptp4l0-21swapper/122:52:161
134491390,4ptp4l0-21swapper/122:52:161
134491390,4ptp4l0-21swapper/121:15:391
134491390,4ptp4l0-21swapper/120:15:141
134491390,4ptp4l0-21swapper/023:05:280
134491390,4ptp4l0-21swapper/022:50:560
134491390,4ptp4l0-21swapper/022:50:560
134491390,4ptp4l0-21swapper/022:27:450
134491390,4ptp4l0-21swapper/021:36:190
134491390,4ptp4l0-21swapper/020:55:530
134491390,4ptp4l0-21swapper/019:25:200
134491390,3ptp4l4708-21ntp_states22:55:243
2848999383,5cyclictest25-21ksoftirqd/119:57:231
134491380,5ptp4l27297-21ps22:35:183
134491380,4ptp4l0-21swapper/321:30:343
134491380,4ptp4l0-21swapper/300:25:243
134491380,4ptp4l0-21swapper/223:41:252
134491380,4ptp4l0-21swapper/222:30:062
134491380,4ptp4l0-21swapper/222:25:242
134491380,4ptp4l0-21swapper/219:40:252
134491380,4ptp4l0-21swapper/200:24:202
134491380,4ptp4l0-21swapper/123:56:301
134491380,4ptp4l0-21swapper/123:56:301
134491380,4ptp4l0-21swapper/123:37:481
134491380,4ptp4l0-21swapper/123:33:011
134491380,4ptp4l0-21swapper/123:28:081
134491380,4ptp4l0-21swapper/122:10:021
134491380,4ptp4l0-21swapper/121:35:091
134491380,4ptp4l0-21swapper/121:00:391
134491380,4ptp4l0-21swapper/120:54:001
134491380,4ptp4l0-21swapper/120:46:351
134491380,4ptp4l0-21swapper/120:38:291
134491380,4ptp4l0-21swapper/120:34:091
134491380,4ptp4l0-21swapper/120:22:121
134491380,4ptp4l0-21swapper/120:08:361
134491380,4ptp4l0-21swapper/100:21:021
134491380,4ptp4l0-21swapper/023:00:240
134491380,4ptp4l0-21swapper/022:55:250
134491380,4ptp4l0-21swapper/021:20:030
134491380,3ptp4l0-21swapper/200:35:132
134491380,3ptp4l0-21swapper/121:30:261
134491380,3ptp4l0-21swapper/120:55:111
134491370,4ptp4l0-21swapper/323:56:313
134491370,4ptp4l0-21swapper/323:56:313
134491370,4ptp4l0-21swapper/123:53:121
134491370,4ptp4l0-21swapper/123:45:501
134491370,4ptp4l0-21swapper/122:25:351
134491370,4ptp4l0-21swapper/121:41:031
134491370,4ptp4l0-21swapper/100:17:571
134491370,4ptp4l0-21swapper/019:45:360
134491370,3ptp4l24419-21diskstats20:10:151
134491370,3ptp4l24419-21diskstats20:10:151
134491370,3ptp4l0-21swapper/323:10:273
134491370,3ptp4l0-21swapper/122:30:531
134491370,3ptp4l0-21swapper/122:21:511
134491370,3ptp4l0-21swapper/122:15:181
134491370,3ptp4l0-21swapper/121:45:301
134491360,3ptp4l0-21swapper/119:20:411
134491360,3ptp4l0-21swapper/119:17:451
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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