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2026-07-05 - 17:13
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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 376 highest latencies:
System rackdslot1.osadl.org (updated Sun Jul 05, 2026 12:45:38)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
105962690,6sleep210598-21latency_hist07:55:012
22320996713,16cyclictest24153-21chrt08:22:001
22320996713,16cyclictest24153-21chrt08:22:001
22320996614,16cyclictest15176-21chrt09:13:151
22320996614,15cyclictest31768-21chrt09:48:491
22320996613,16cyclictest6567-21chrt12:22:331
22320996514,16cyclictest5750-21chrt07:43:321
134491650,4ptp4l0-21swapper/308:25:013
22320996413,15cyclictest24642-21chrt09:30:591
22320996413,15cyclictest10911-21taskset09:05:081
22320996314,16cyclictest31889-21chrt12:06:121
22320996313,16cyclictest1179-21chrt08:42:221
22320996312,12cyclictest6089-21taskset10:00:351
22320996311,11cyclictest24786-21taskset11:51:281
134491630,5ptp4l0-21swapper/310:30:103
22320996214,11cyclictest12799-21cat07:59:551
22320996211,10cyclictest28799-21seq07:22:251
22320996114,11cyclictest29444-21seq09:43:261
22320996113,11cyclictest26402-21seq07:16:231
22320996113,11cyclictest17530-21taskset09:18:591
22320996112,12cyclictest24246-21seq07:13:141
22320996112,11cyclictest31726-21seq10:59:051
22320996111,11cyclictest8138-21taskset08:57:171
134491610,5ptp4l0-21swapper/311:58:503
22320996016,11cyclictest28916-21seq08:31:251
22320996015,12cyclictest5956-21taskset08:53:471
22320996015,12cyclictest21720-21seq08:15:361
22320996015,11cyclictest24911-21cat10:44:561
22320996015,10cyclictest14997-21seq08:02:441
22320996014,9cyclictest962-21seq07:32:201
22320996014,11cyclictest19526-21seq08:11:551
22320996014,11cyclictest1601-21seq11:03:301
22320996014,11cyclictest13780-21seq12:39:011
22320996012,11cyclictest1552-21seq09:52:211
134491600,3ptp4l1301-21snmpd08:38:112
134491600,3ptp4l0-21swapper/309:46:543
134491600,26ptp4l41-21ksoftirqd/308:55:183
22320995915,10cyclictest8024-21seq07:48:171
22320995914,11cyclictest17347-21seq08:08:261
22320995914,11cyclictest13000-21seq11:26:201
22320995913,12cyclictest27110-21taskset09:38:161
22320995913,10cyclictest3236-21taskset07:36:001
22320995913,10cyclictest10834-21chrt10:12:321
134491590,4ptp4l0-21swapper/008:15:120
134491590,3ptp4l0-21swapper/211:55:262
22320995815,11cyclictest31483-21seq08:39:521
22320995815,11cyclictest27051-21seq10:48:011
22320995815,10cyclictest27018-21seq11:55:401
22320995814,18cyclictest13011-21seq10:16:001
22320995814,12cyclictest10349-21seq09:00:541
22320995814,11cyclictest6089-21seq11:11:201
22320995814,11cyclictest22537-21chrt09:28:261
22320995814,11cyclictest22537-21chrt09:28:261
22320995814,11cyclictest15544-21seq11:31:051
22320995814,11cyclictest15544-21seq11:31:051
22320995814,11cyclictest15440-21seq10:21:411
22320995812,15cyclictest1763-21taskset12:10:551
22320995714,16cyclictest11287-21chrt12:34:121
22320995714,11cyclictest20370-21seq11:43:541
22320995713,12cyclictest22695-21taskset11:49:101
22320995713,11cyclictest8523-21runrttasks11:18:051
134491570,4ptp4l29174-21sed09:40:262
134491570,3ptp4l0-21swapper/307:42:173
22320995615,10cyclictest9042-21seq12:29:501
22320995615,10cyclictest9042-21seq12:29:501
22320995614,15cyclictest10342-21seq07:53:301
22320995614,10cyclictest20153-21seq10:33:161
22320995613,10cyclictest15943-21runrttasks10:25:101
22320995612,10cyclictest22324-21runrttasks10:36:291
134491560,4ptp4l0-21swapper/210:27:312
134491560,4ptp4l0-21swapper/109:55:151
22320995514,16cyclictest29323-21chrt10:52:401
22320995514,11cyclictest4286-21seq12:18:041
134491550,5ptp4l0-21swapper/311:34:043
134491550,5ptp4l0-21swapper/311:34:043
22320995412,10cyclictest30988-21taskset07:26:031
22320995412,10cyclictest19880-21taskset09:21:361
22320995412,10cyclictest10687-21taskset11:21:071
22320995411,9cyclictest18148-21chrt11:39:571
134491540,6ptp4l0-21swapper/310:47:413
134491540,4ptp4l0-21swapper/311:26:183
134491540,4ptp4l0-21swapper/307:50:233
134491540,4ptp4l0-21swapper/210:37:352
134491540,12ptp4l19987-21apt-get07:05:122
22320995314,15cyclictest3858-21taskset11:07:121
2231999537,11cyclictest1317-21runrttasks11:34:510
2231999537,11cyclictest1317-21runrttasks11:34:510
2231999537,11cyclictest1317-21runrttasks10:54:100
2231999536,16cyclictest1317-21runrttasks09:26:130
2231999536,16cyclictest1317-21runrttasks09:26:130
2231999536,11cyclictest29657-21seq12:02:070
2231999536,11cyclictest1317-21runrttasks08:05:500
2231999533,15cyclictest23960-21ntp_kernel_err10:40:240
2231999531,10cyclictest0-21swapper/010:25:160
134491530,4ptp4l0-21swapper/308:50:143
134491530,4ptp4l0-21swapper/308:40:523
134491530,4ptp4l0-21swapper/211:47:412
134491530,4ptp4l0-21swapper/209:53:262
2231999528,6cyclictest0-21swapper/009:00:180
2231999527,10cyclictest1317-21runrttasks11:27:250
134491520,4ptp4l0-21swapper/307:14:363
134491520,4ptp4l0-21swapper/209:14:462
134491520,3ptp4l0-21swapper/310:59:213
22321995122,3cyclictest33-21ksoftirqd/210:51:262
22320995113,15cyclictest3500-21chrt08:46:391
2231999516,10cyclictest1317-21runrttasks11:43:290
2231999515,10cyclictest0-21swapper/008:41:160
2231999514,11cyclictest1317-21runrttasks11:55:490
2231999512,10cyclictest0-21swapper/007:28:230
134491510,4ptp4l0-21swapper/309:36:193
134491510,4ptp4l0-21swapper/307:30:173
22320995014,10cyclictest26848-21chrt08:29:221
2231999506,7cyclictest21834-21ntp_states11:45:220
2231999506,10cyclictest1317-21runrttasks08:14:240
134491500,6ptp4l41-21ksoftirqd/310:00:263
134491500,4ptp4l0-21swapper/311:50:593
134491500,4ptp4l0-21swapper/212:16:472
134491500,4ptp4l0-21swapper/007:08:590
22321994916,4cyclictest33-21ksoftirqd/209:30:272
2231999497,7cyclictest0-21swapper/011:00:270
2231999491,5cyclictest137891phc2sys08:20:220
2231999491,5cyclictest137891phc2sys08:20:220
134491490,4ptp4l0-21swapper/310:35:313
134491490,4ptp4l0-21swapper/308:09:553
134491490,4ptp4l0-21swapper/307:20:443
134491490,4ptp4l0-21swapper/212:28:322
134491490,4ptp4l0-21swapper/212:28:322
134491490,4ptp4l0-21swapper/207:23:182
134491490,10ptp4l0-21swapper/210:55:062
22321994820,7cyclictest33-21ksoftirqd/207:20:012
22321994816,7cyclictest33-21ksoftirqd/207:45:192
22321994814,4cyclictest33-21ksoftirqd/209:17:332
2231999487,17cyclictest1317-21runrttasks11:53:030
2231999486,10cyclictest6396-21taskset10:04:300
2231999484,9cyclictest0-21swapper/010:22:270
2231999482,9cyclictest0-21swapper/012:25:300
2231999482,9cyclictest0-21swapper/012:25:300
2231999482,9cyclictest0-21swapper/007:32:270
134491480,4ptp4l0-21swapper/311:12:213
134491480,4ptp4l0-21swapper/310:42:003
134491480,4ptp4l0-21swapper/309:50:473
134491480,4ptp4l0-21swapper/210:22:332
134491480,3ptp4l0-21swapper/207:28:172
22321994741,3cyclictest33-21ksoftirqd/210:35:012
22321994717,4cyclictest33-21ksoftirqd/209:07:522
22321994716,4cyclictest33-21ksoftirqd/211:27:462
22321994714,6cyclictest33-21ksoftirqd/208:20:102
22321994714,6cyclictest33-21ksoftirqd/208:20:102
22321994713,5cyclictest33-21ksoftirqd/209:20:212
22320994712,11cyclictest8566-21chrt10:07:551
2231999474,11cyclictest0-21swapper/007:19:010
2231999472,9cyclictest0-21swapper/010:11:390
134491470,9ptp4l0-21swapper/310:25:023
134491470,4ptp4l0-21swapper/311:02:333
134491470,4ptp4l0-21swapper/309:01:433
134491470,3ptp4l0-21swapper/312:10:303
134491470,3ptp4l0-21swapper/308:37:003
134491470,3ptp4l0-21swapper/208:25:172
2232199465,6cyclictest33-21ksoftirqd/208:44:592
22321994617,4cyclictest33-21ksoftirqd/208:49:422
22321994614,4cyclictest33-21ksoftirqd/209:01:012
2232099469,35cyclictest0-21swapper/112:00:131
2231999463,12cyclictest0-21swapper/007:40:000
134491460,9ptp4l0-21swapper/309:40:263
134491460,5ptp4l0-21swapper/107:06:401
134491460,4ptp4l0-21swapper/307:15:493
134491460,3ptp4l0-21swapper/309:15:553
134491460,11ptp4l0-21swapper/008:00:250
134491460,10ptp4l0-21swapper/212:20:162
22321994515,4cyclictest33-21ksoftirqd/211:15:002
22321994514,4cyclictest33-21ksoftirqd/212:39:352
22321994514,4cyclictest33-21ksoftirqd/209:35:132
22321994512,6cyclictest33-21ksoftirqd/208:10:162
22321994510,6cyclictest33-21ksoftirqd/212:35:012
2231999457,11cyclictest1317-21runrttasks09:09:200
2231999456,6cyclictest0-21swapper/009:57:040
2231999456,11cyclictest0-21swapper/008:54:240
2231999455,7cyclictest2969-21/usr/sbin/munin12:15:170
2231999455,5cyclictest0-21swapper/009:41:290
2231999452,9cyclictest0-21swapper/012:05:330
2231999452,9cyclictest0-21swapper/009:10:500
2231999452,10cyclictest0-21swapper/009:53:410
134491450,6ptp4l0-21swapper/009:15:120
134491450,5ptp4l0-21swapper/310:05:133
134491450,3ptp4l0-21swapper/310:14:093
134491450,11ptp4l0-21swapper/011:35:260
134491450,10ptp4l0-21swapper/307:46:253
22321994438,3cyclictest33-21ksoftirqd/211:25:002
22321994431,11cyclictest33-21ksoftirqd/210:20:012
22321994414,7cyclictest33-21ksoftirqd/208:04:542
22321994412,3cyclictest33-21ksoftirqd/211:43:142
22321994411,5cyclictest33-21ksoftirqd/210:10:142
22321994410,5cyclictest33-21ksoftirqd/210:45:212
22321994410,5cyclictest33-21ksoftirqd/209:55:132
2232199440,3cyclictest121rcu_preempt08:57:592
134491440,9ptp4l0-21swapper/212:04:482
134491440,7ptp4l0-21swapper/307:05:193
134491440,6ptp4l8988-21iostat_ios07:50:160
134491440,6ptp4l0-21swapper/207:35:282
134491440,4ptp4l27160-21apt-get08:30:122
134491440,4ptp4l0-21swapper/312:33:433
134491440,4ptp4l0-21swapper/309:12:103
134491440,4ptp4l0-21swapper/307:29:443
134491440,4ptp4l0-21swapper/209:48:182
134491440,3ptp4l0-21swapper/312:36:123
134491440,10ptp4l0-21swapper/312:29:413
134491440,10ptp4l0-21swapper/312:29:413
2232199435,2cyclictest121rcu_preempt12:08:012
22321994315,3cyclictest33-21ksoftirqd/209:25:222
22321994315,3cyclictest33-21ksoftirqd/209:25:222
22321994313,4cyclictest33-21ksoftirqd/211:15:282
22321994312,5cyclictest33-21ksoftirqd/208:05:122
134491430,8ptp4l0-21swapper/312:09:033
134491430,5ptp4l6525-21df08:55:140
134491430,5ptp4l0-21swapper/309:55:123
134491430,5ptp4l0-21swapper/009:20:200
134491430,4ptp4l14782-21ntp_states10:20:233
134491430,4ptp4l10720-21apt-get07:55:113
134491430,4ptp4l0-21swapper/211:35:102
134491430,3ptp4l0-21swapper/312:23:043
134491430,3ptp4l0-21swapper/311:45:183
2232199429,5cyclictest33-21ksoftirqd/208:50:172
2232199428,6cyclictest33-21ksoftirqd/210:44:592
2232199428,6cyclictest33-21ksoftirqd/207:40:192
22321994238,2cyclictest33-21ksoftirqd/208:00:012
22321994237,2cyclictest33-21ksoftirqd/208:20:002
2231999428,10cyclictest6468-21taskset12:21:180
134491420,9ptp4l0-21swapper/012:35:190
134491420,5ptp4l21566-21meminfo09:25:203
134491420,5ptp4l21566-21meminfo09:25:203
134491420,4ptp4l572-21iostat12:10:190
134491420,4ptp4l32446-21apt-get12:10:132
134491420,4ptp4l0-21swapper/311:07:113
134491420,4ptp4l0-21swapper/308:03:403
134491420,4ptp4l0-21swapper/211:04:372
134491420,4ptp4l0-21swapper/010:55:190
134491420,3ptp4l23024-21apt-get11:50:112
134491420,3ptp4l1993-21apt-get11:05:132
134491420,10ptp4l0-21swapper/310:15:023
22321994137,2cyclictest33-21ksoftirqd/207:30:252
2231999412,11cyclictest0-21swapper/008:38:020
134491410,5ptp4l0-21swapper/311:40:113
134491410,5ptp4l0-21swapper/309:20:093
134491410,5ptp4l0-21swapper/308:30:203
134491410,5ptp4l0-21swapper/011:20:440
134491410,5ptp4l0-21swapper/010:45:160
134491410,5ptp4l0-21swapper/008:31:310
134491410,4ptp4l25810-21meminfo08:25:190
134491410,4ptp4l22350-21apt-get07:10:122
134491410,4ptp4l0-21swapper/311:22:143
134491410,4ptp4l0-21swapper/310:50:293
134491410,4ptp4l0-21swapper/210:03:212
134491410,4ptp4l0-21swapper/011:06:000
134491410,4ptp4l0-21swapper/007:55:420
134491410,4ptp4l0-21swapper/007:48:530
134491410,3ptp4l18466-21df10:30:130
134491410,3ptp4l1449-21apt-get07:35:130
134491410,3ptp4l0-21swapper/308:23:383
134491410,3ptp4l0-21swapper/308:23:383
2232199406,6cyclictest33-21ksoftirqd/211:30:162
2232199406,6cyclictest33-21ksoftirqd/211:30:162
2232199405,2cyclictest121rcu_preempt10:05:142
2231999401,11cyclictest0-21swapper/012:32:010
134491400,5ptp4l0-21swapper/311:37:583
134491400,4ptp4l1653-21/usr/sbin/munin08:45:263
134491400,4ptp4l0-21swapper/312:00:003
134491400,4ptp4l0-21swapper/309:30:253
134491400,4ptp4l0-21swapper/308:10:163
134491400,4ptp4l0-21swapper/011:13:200
134491400,4ptp4l0-21swapper/010:06:550
134491400,4ptp4l0-21swapper/009:31:350
134491400,4ptp4l0-21swapper/007:21:130
134491400,4ptp4l0-21swapper/007:10:150
134491400,3ptp4l3015-21ls07:35:293
2231999396,6cyclictest0-21swapper/009:35:020
134491390,9ptp4l0-21swapper/011:16:180
134491390,5ptp4l0-21swapper/008:45:120
134491390,4ptp4l0-21swapper/311:18:233
134491390,4ptp4l0-21swapper/309:08:453
134491390,4ptp4l0-21swapper/010:35:210
134491390,4ptp4l0-21swapper/010:15:530
134491390,3ptp4l0-21swapper/308:15:283
134491390,3ptp4l0-21swapper/009:45:240
134491380,3ptp4l0-21swapper/312:15:153
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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