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2026-09-12 - 16:53
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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 792 highest latencies:
System rackdslot1.osadl.org (updated Sat Sep 12, 2026 12:45:37)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
134491730,3ptp4l0-21swapper/309:55:133
2653699711,23cyclictest212-21systemd-journal10:30:190
134491710,4ptp4l26535-21cyclictest07:20:273
9792690,6sleep30-21swapper/312:00:203
2653699681,23cyclictest3169-21sed08:35:300
2653699671,23cyclictest7137-21grep08:45:220
2653699661,29cyclictest3687-21taskset09:47:010
2653699661,28cyclictest15356-21taskset09:05:090
2653699660,25cyclictest13769-21taskset11:18:090
26537996532,4cyclictest25-21ksoftirqd/107:25:251
26537996532,4cyclictest25-21ksoftirqd/107:25:251
2653699650,28cyclictest28739-21taskset08:21:450
2653699650,27cyclictest18819-21seq12:35:440
26537996432,7cyclictest25-21ksoftirqd/112:05:011
26537996428,6cyclictest25-21ksoftirqd/110:30:281
2653699642,19cyclictest0-21swapper/009:20:260
2653699640,28cyclictest2111-21seq12:02:220
2653699640,28cyclictest18471-21seq11:28:360
2653699640,28cyclictest16431-21seq12:32:110
2653699640,27cyclictest25275-21taskset11:42:150
2653699640,27cyclictest21855-21taskset08:07:130
2653699640,27cyclictest19663-21seq09:14:250
2653699640,27cyclictest14936-21seq09:02:410
2653699640,21cyclictest15546-21mailstats11:20:250
2653699640,20cyclictest20064-21grep09:15:140
26537996332,7cyclictest25-21ksoftirqd/111:00:151
26537996328,8cyclictest25-21ksoftirqd/111:05:141
26537996327,10cyclictest25-21ksoftirqd/109:40:161
2653699630,27cyclictest3107-21taskset07:29:050
2653699630,27cyclictest3107-21taskset07:29:050
2653699630,27cyclictest1697-21seq10:52:020
134491630,4ptp4l0-21swapper/212:26:362
26537996231,8cyclictest25-21ksoftirqd/107:30:301
26537996230,4cyclictest25-21ksoftirqd/109:35:001
26537996229,10cyclictest25-21ksoftirqd/111:25:201
26537996224,6cyclictest25-21ksoftirqd/110:45:151
26537996223,10cyclictest25-21ksoftirqd/111:55:261
2653699627,19cyclictest1099-21seq08:34:140
2653699620,34cyclictest31942-21taskset10:48:520
2653699620,29cyclictest27684-21seq11:48:340
2653699620,27cyclictest28789-21taskset09:30:320
2653699620,27cyclictest20015-21taskset10:24:010
2653699620,26cyclictest24051-21seq08:10:550
2653699620,26cyclictest20603-21seq11:31:290
2653699620,25cyclictest10094-21seq07:42:180
2653699620,22cyclictest7816-21taskset09:55:270
134491620,5ptp4l0-21swapper/207:09:382
26537996131,7cyclictest25-21ksoftirqd/109:10:211
26537996129,8cyclictest25-21ksoftirqd/108:50:161
26537996129,7cyclictest25-21ksoftirqd/112:30:201
26537996128,6cyclictest25-21ksoftirqd/110:25:181
26537996122,9cyclictest25-21ksoftirqd/111:25:001
2653699612,21cyclictest0-21swapper/009:51:040
2653699612,19cyclictest0-21swapper/010:25:180
2653699611,26cyclictest7642-21taskset07:38:190
2653699611,25cyclictest15397-21seq10:13:590
2653699611,25cyclictest15397-21seq10:13:590
2653699610,27cyclictest26556-21seq08:18:290
2653699610,25cyclictest17275-21seq07:57:390
134491610,4ptp4l0-21swapper/208:35:282
26537996030,3cyclictest25-21ksoftirqd/110:00:261
26537996028,7cyclictest25-21ksoftirqd/109:05:011
26537996028,6cyclictest25-21ksoftirqd/107:40:181
26537996028,3cyclictest25-21ksoftirqd/110:50:181
26537996026,7cyclictest25-21ksoftirqd/108:05:261
26537996021,8cyclictest25-21ksoftirqd/108:10:251
2653699601,27cyclictest31095-21seq08:27:320
2653699600,28cyclictest10147-21runrttasks08:51:100
2653699600,26cyclictest30820-21taskset07:18:540
2653699600,23cyclictest19525-21seq08:01:480
105122600,6sleep10-21swapper/111:10:241
26537995929,8cyclictest25-21ksoftirqd/111:30:261
26537995928,9cyclictest25-21ksoftirqd/112:20:191
26537995928,4cyclictest25-21ksoftirqd/107:10:231
26537995928,3cyclictest25-21ksoftirqd/110:55:191
26537995926,4cyclictest25-21ksoftirqd/112:05:261
26537995925,7cyclictest25-21ksoftirqd/109:35:261
26537995924,7cyclictest25-21ksoftirqd/108:00:221
26537995921,8cyclictest25-21ksoftirqd/107:35:261
2653699592,19cyclictest0-21swapper/010:35:250
2653699590,29cyclictest12411-21seq07:47:360
2653699590,27cyclictest424-21seq07:20:310
2653699590,27cyclictest29563-21seq10:42:470
2653699590,26cyclictest26592-21taskset09:29:320
2653699590,26cyclictest22853-21taskset11:35:530
2653699590,25cyclictest5813-21seq08:44:280
2653699590,25cyclictest31369-21taskset09:39:110
2653699590,24cyclictest6548-21seq11:01:360
2653699590,19cyclictest2748-21apt-key12:05:020
134491590,3ptp4l14105-21ntpq09:00:233
26537995830,8cyclictest25-21ksoftirqd/108:40:001
26537995827,8cyclictest25-21ksoftirqd/110:05:201
26537995827,4cyclictest25-21ksoftirqd/108:25:281
26537995826,9cyclictest25-21ksoftirqd/110:15:241
26537995824,9cyclictest25-21ksoftirqd/112:15:261
26537995824,3cyclictest25-21ksoftirqd/111:37:561
2653699582,22cyclictest0-21swapper/010:17:050
2653699582,20cyclictest0-21swapper/011:59:220
2653699581,27cyclictest9016-21seq11:08:500
2653699581,24cyclictest589-21/usr/sbin/munin09:40:230
2653699581,22cyclictest10863-21ntp_states12:20:230
2653699580,26cyclictest5258-21seq07:32:110
2653699580,26cyclictest28279-21taskset07:10:430
134491580,5ptp4l0-21swapper/311:25:263
134491580,4ptp4l0-21swapper/312:14:123
134491580,4ptp4l0-21swapper/209:50:002
134491580,3ptp4l0-21swapper/308:05:473
75202570,3sleep30-21swapper/311:05:163
26537995731,3cyclictest25-21ksoftirqd/107:59:591
26537995727,8cyclictest25-21ksoftirqd/110:35:201
26537995726,8cyclictest25-21ksoftirqd/108:40:241
26537995722,8cyclictest25-21ksoftirqd/111:15:251
2653699571,22cyclictest28032-21/usr/sbin/munin11:50:220
2653699570,27cyclictest12700-21seq08:59:280
2653699570,26cyclictest7069-21taskset12:13:400
2653699570,24cyclictest9421-21taskset12:19:220
2653699570,24cyclictest14625-21seq07:51:330
255042570,5sleep20-21swapper/209:25:182
134491570,4ptp4l0-21swapper/212:00:282
134491570,4ptp4l0-21swapper/112:25:261
134491570,3ptp4l0-21swapper/310:21:003
134491570,3ptp4l0-21swapper/209:15:162
134491570,13ptp4l0-21swapper/308:20:283
26537995625,2cyclictest25-21ksoftirqd/107:46:271
26537995624,4cyclictest25-21ksoftirqd/112:35:221
26537995623,3cyclictest25-21ksoftirqd/108:21:341
2653699562,21cyclictest0-21swapper/010:57:210
2653699560,29cyclictest11256-21seq11:13:080
2653699560,20cyclictest11518-21hddtemp_smartct10:05:180
134491560,4ptp4l0-21swapper/307:40:283
134491560,3ptp4l0-21swapper/311:24:063
26537995522,7cyclictest25-21ksoftirqd/108:15:261
2653699552,21cyclictest0-21swapper/010:03:000
134491550,4ptp4l0-21swapper/310:40:203
134491550,4ptp4l0-21swapper/310:32:293
134491550,4ptp4l0-21swapper/310:13:203
134491550,4ptp4l0-21swapper/310:13:203
134491550,4ptp4l0-21swapper/210:45:022
2653799545,7cyclictest25-21ksoftirqd/109:55:151
26537995423,6cyclictest25-21ksoftirqd/109:45:131
26537995421,4cyclictest25-21ksoftirqd/107:22:531
26537995420,9cyclictest25-21ksoftirqd/111:50:121
134491540,5ptp4l0-21swapper/308:19:173
134491540,4ptp4l0-21swapper/207:25:082
134491540,4ptp4l0-21swapper/207:25:082
26537995322,9cyclictest25-21ksoftirqd/107:50:181
134491530,4ptp4l0-21swapper/311:47:443
134491530,4ptp4l0-21swapper/311:32:073
134491530,4ptp4l0-21swapper/309:31:533
134491530,3ptp4l0-21swapper/210:18:192
134491530,3ptp4l0-21swapper/109:53:341
26537995220,6cyclictest25-21ksoftirqd/108:32:481
26537995218,3cyclictest25-21ksoftirqd/109:29:571
2653799520,6cyclictest27812-21turbostat11:50:011
134491520,4ptp4l0-21swapper/311:40:213
134491520,4ptp4l0-21swapper/311:00:163
2653799513,7cyclictest25-21ksoftirqd/110:10:171
2653799513,7cyclictest25-21ksoftirqd/110:10:171
26537995119,3cyclictest25-21ksoftirqd/109:06:221
134491510,4ptp4l0-21swapper/210:14:372
134491510,4ptp4l0-21swapper/210:14:372
134491510,4ptp4l0-21swapper/207:40:392
134491510,3ptp4l0-21swapper/210:07:092
134491510,10ptp4l24213-21/usr/sbin/munin07:05:120
2653799504,7cyclictest25-21ksoftirqd/107:20:001
2653799502,39cyclictest0-21swapper/112:10:121
2653699500,26cyclictest13750-21runrttasks12:25:450
134491500,4ptp4l0-21swapper/310:28:173
134491500,4ptp4l0-21swapper/211:33:312
2653799491,6cyclictest25-21ksoftirqd/110:20:131
134491490,4ptp4l0-21swapper/307:51:133
134491490,3ptp4l0-21swapper/312:16:103
134491490,3ptp4l0-21swapper/307:33:543
2653799485,3cyclictest25-21ksoftirqd/109:20:241
2653799484,3cyclictest25-21ksoftirqd/108:45:151
2653799482,3cyclictest121rcu_preempt08:55:251
134491480,4ptp4l0-21swapper/307:59:183
134491480,4ptp4l0-21swapper/210:58:202
2653799475,7cyclictest25-21ksoftirqd/110:40:141
26537994724,3cyclictest25-21ksoftirqd/111:41:521
134491470,8ptp4l0-21swapper/107:05:121
134491470,4ptp4l0-21swapper/309:44:363
134491470,10ptp4l0-21swapper/208:54:222
2653899461,2cyclictest121rcu_preempt11:45:262
2653799462,7cyclictest25-21ksoftirqd/109:15:151
134491460,4ptp4l0-21swapper/312:24:033
134491460,4ptp4l0-21swapper/309:51:093
134491460,3ptp4l0-21swapper/310:08:053
26538994540,3cyclictest33-21ksoftirqd/211:40:002
134491450,9ptp4l0-21swapper/209:43:162
134491450,3ptp4l0-21swapper/307:47:493
134491450,3ptp4l0-21swapper/207:13:312
134491440,9ptp4l0-21swapper/208:07:482
134491440,5ptp4l0-21swapper/307:09:223
134491440,4ptp4l18053-21apt-get10:20:142
134491440,4ptp4l16542-21apt-get11:25:142
134491440,4ptp4l0-21swapper/211:05:172
134491440,3ptp4l15373-21apt-get09:05:112
134491430,9ptp4l0-21swapper/212:06:412
134491430,9ptp4l0-21swapper/207:38:372
134491430,8ptp4l0-21swapper/212:24:432
134491430,8ptp4l0-21swapper/211:17:082
134491430,4ptp4l20348-21apt-get10:25:132
134491430,4ptp4l0-21swapper/310:37:453
134491430,4ptp4l0-21swapper/207:45:462
134491430,3ptp4l0-21swapper/311:17:183
134491430,3ptp4l0-21swapper/309:27:263
26538994237,3cyclictest33-21ksoftirqd/208:15:012
134491420,9ptp4l0-21swapper/209:22:562
134491420,5ptp4l1301-21snmpd10:34:182
134491420,4ptp4l8787-21apt-get10:00:133
134491420,4ptp4l4772-21apt-get11:00:142
134491420,4ptp4l0-21swapper/307:10:223
134491420,4ptp4l0-21swapper/211:22:462
134491420,4ptp4l0-21swapper/210:35:152
134491420,4ptp4l0-21swapper/207:15:582
134491420,3ptp4l3300-21ls09:45:252
134491420,3ptp4l0-21swapper/307:35:053
134491420,1ptp4l0-21swapper/309:37:283
26538994136,3cyclictest33-21ksoftirqd/207:55:012
134491410,6ptp4l0-21swapper/208:30:222
134491410,5ptp4l0-21swapper/309:45:113
134491410,5ptp4l0-21swapper/309:15:173
134491410,4ptp4l0-21swapper/308:35:203
134491410,4ptp4l0-21swapper/210:50:152
134491410,4ptp4l0-21swapper/209:03:242
134491410,3ptp4l17737-21apt-get08:00:113
134491410,3ptp4l0-21swapper/209:56:072
26538994035,3cyclictest33-21ksoftirqd/210:00:152
134491400,7ptp4l0-21swapper/312:28:163
134491400,5ptp4l0-21swapper/312:05:023
134491400,5ptp4l0-21swapper/311:35:243
134491400,5ptp4l0-21swapper/209:35:252
134491400,4ptp4l0-21swapper/212:36:092
134491400,4ptp4l0-21swapper/212:31:522
134491400,4ptp4l0-21swapper/212:15:242
134491400,4ptp4l0-21swapper/211:12:232
134491400,4ptp4l0-21swapper/210:40:382
134491400,4ptp4l0-21swapper/209:31:592
134491400,4ptp4l0-21swapper/208:55:202
134491400,4ptp4l0-21swapper/208:48:042
134491400,4ptp4l0-21swapper/208:41:502
134491400,4ptp4l0-21swapper/208:28:462
134491400,4ptp4l0-21swapper/208:01:262
134491400,3ptp4l15730-21apt-get10:15:103
134491390,4ptp4l28080-21awk08:20:232
134491390,4ptp4l22842-21if_enp4s008:10:183
134491390,4ptp4l0-21swapper/211:58:352
134491390,4ptp4l0-21swapper/211:52:342
134491390,4ptp4l0-21swapper/211:40:182
134491390,4ptp4l0-21swapper/208:15:452
134491390,4ptp4l0-21swapper/207:55:212
134491390,4ptp4l0-21swapper/207:34:542
134491390,4ptp4l0-21swapper/207:22:422
134491390,2ptp4l32563-21ls08:30:223
134491380,4ptp4l0-21swapper/312:31:123
134491380,4ptp4l0-21swapper/311:58:043
134491380,4ptp4l0-21swapper/311:12:553
134491380,4ptp4l0-21swapper/310:46:043
134491380,4ptp4l0-21swapper/308:53:153
134491380,4ptp4l0-21swapper/307:17:013
134491380,4ptp4l0-21swapper/212:10:422
134491380,4ptp4l0-21swapper/209:10:372
134491380,3ptp4l0-21swapper/310:55:173
134491380,3ptp4l0-21swapper/309:10:393
134491380,3ptp4l0-21swapper/308:29:553
134491370,4ptp4l729-21sort10:50:173
134491370,4ptp4l0-21swapper/311:50:443
134491370,4ptp4l0-21swapper/309:05:033
134491370,4ptp4l0-21swapper/308:56:473
134491370,3ptp4l0-21swapper/312:35:113
134491370,3ptp4l0-21swapper/309:24:323
134491370,3ptp4l0-21swapper/307:27:363
134491370,3ptp4l0-21swapper/307:27:363
134491360,3ptp4l0-21swapper/308:45:233
134491360,3ptp4l0-21swapper/308:42:523
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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