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2026-07-18 - 13:56
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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 376 highest latencies:
System rackdslot1.osadl.org (updated Sat Jul 18, 2026 00:45:36)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
134491790,4ptp4l0-21swapper/222:35:172
29376997316,12cyclictest9315-21chrt23:03:303
29376997116,12cyclictest20885-21chrt23:28:323
29376997114,11cyclictest29947-21chrt22:36:053
29376996916,12cyclictest18512-21chrt23:22:343
29376996915,12cyclictest6300-21taskset20:38:593
29376996914,11cyclictest29993-21taskset23:47:103
29376996914,11cyclictest16399-21taskset00:26:033
29376996912,15cyclictest7463-21irqrtprio20:40:203
134491690,6ptp4l0-21swapper/219:09:292
29376996815,11cyclictest8815-21taskset21:51:573
29376996814,11cyclictest3662-21chrt19:24:133
29376996813,11cyclictest25511-21chrt22:28:073
29376996813,10cyclictest1317-21runrttasks22:09:193
29376996811,11cyclictest18174-21cron21:05:003
29376996714,11cyclictest32429-21chrt23:54:003
29376996714,10cyclictest2493-21taskset22:49:373
29376996713,11cyclictest15131-21taskset19:48:483
29376996614,12cyclictest4722-21taskset00:04:153
29376996614,11cyclictest20850-21chrt22:17:323
29376996612,11cyclictest2218-21taskset23:57:363
134491660,4ptp4l0-21swapper/023:20:270
29376996515,12cyclictest31640-21chrt21:30:463
29376996515,12cyclictest14108-21taskset00:21:113
29376996515,11cyclictest11348-21chrt21:59:593
29376996514,11cyclictest11861-21chrt00:19:483
29376996514,10cyclictest23241-21chrt23:34:183
29376996511,4cyclictest134491ptp4l22:57:013
29376996414,12cyclictest29454-21taskset21:27:053
29376996414,11cyclictest24776-21taskset21:16:303
29376996413,10cyclictest13541-21taskset22:00:433
134491630,4ptp4l0-21swapper/020:45:180
29376996216,11cyclictest4287-21chrt21:42:463
29376996216,10cyclictest21067-21chrt00:37:053
29376996214,11cyclictest29006-21chrt20:16:253
134491620,4ptp4l0-21swapper/222:19:362
29376996115,11cyclictest21291-21chrt22:20:053
134491590,4ptp4l0-21swapper/023:10:260
29376995810,11cyclictest11971-21/usr/sbin/munin23:10:183
134491580,4ptp4l0-21swapper/022:44:310
59132570,4sleep10-21swapper/120:35:281
2937699579,6cyclictest134491ptp4l20:05:023
29376995716,11cyclictest17372-21taskset19:52:253
134491570,3ptp4l0-21swapper/219:44:472
29376995616,11cyclictest10931-21taskset20:49:133
29376995613,6cyclictest134491ptp4l20:23:563
29376995611,42cyclictest14897-21sed23:15:173
29373995618,4cyclictest9-21ksoftirqd/019:55:200
134491560,3ptp4l0-21swapper/223:50:262
134491560,3ptp4l0-21swapper/222:25:242
29376995516,11cyclictest13195-21taskset20:53:473
29376995515,12cyclictest27780-21taskset22:32:473
29376995513,9cyclictest5721-21chrt19:26:143
29376995512,12cyclictest3731-21taskset22:50:213
29376995512,12cyclictest3731-21taskset22:50:213
134491550,4ptp4l0-21swapper/123:00:591
134491550,4ptp4l0-21swapper/023:45:190
134491550,4ptp4l0-21swapper/021:44:080
134491550,3ptp4l0-21swapper/222:51:062
134491550,3ptp4l0-21swapper/222:51:062
134491550,3ptp4l0-21swapper/020:26:010
29376995417,11cyclictest25252-21taskset23:35:413
29376995416,13cyclictest3764-21taskset20:31:003
29376995413,9cyclictest8201-21taskset19:33:333
29376995411,9cyclictest21815-21ntpq21:10:223
134491540,4ptp4l0-21swapper/319:08:513
134491540,4ptp4l0-21swapper/223:15:152
134491540,4ptp4l0-21swapper/222:09:252
134491540,4ptp4l0-21swapper/020:06:110
134491540,3ptp4l17830-21apt-get19:55:132
134491540,3ptp4l0-21swapper/122:58:181
29376995315,11cyclictest9393-21taskset00:12:483
29376995313,9cyclictest24554-21taskset20:08:103
134491530,4ptp4l0-21swapper/220:50:112
134491530,4ptp4l0-21swapper/220:35:162
134491530,3ptp4l0-21swapper/222:02:472
134491530,3ptp4l0-21swapper/220:25:042
134491530,13ptp4l0-21swapper/219:45:172
29376995214,10cyclictest26888-21taskset20:13:393
134491520,4ptp4l0-21swapper/219:32:282
134491520,4ptp4l0-21swapper/219:30:002
134491520,4ptp4l0-21swapper/219:10:382
134491520,4ptp4l0-21swapper/200:33:462
134491520,4ptp4l0-21swapper/200:26:532
134491520,3ptp4l0-21swapper/220:56:332
134491520,3ptp4l0-21swapper/200:23:522
29376995116,9cyclictest27909-21taskset23:44:593
29376995116,12cyclictest18231-21taskset22:11:173
29376995115,10cyclictest995-21taskset19:15:533
134491510,4ptp4l0-21swapper/221:33:272
134491510,4ptp4l0-21swapper/122:30:091
134491510,3ptp4l0-21swapper/220:23:352
134491500,5ptp4l0-21swapper/219:51:292
134491500,4ptp4l0-21swapper/223:25:432
134491500,4ptp4l0-21swapper/223:24:242
134491500,4ptp4l0-21swapper/222:57:202
134491500,4ptp4l0-21swapper/220:02:352
134491500,4ptp4l0-21swapper/200:35:282
134491500,4ptp4l0-21swapper/123:57:531
29376994917,11cyclictest7174-21seq00:08:423
29376994916,20cyclictest15714-21taskset20:58:153
29376994916,11cyclictest19869-21taskset19:59:593
29376994915,11cyclictest1645-21taskset20:28:563
2937699490,47cyclictest0-21swapper/322:40:273
134491490,4ptp4l0-21swapper/222:12:062
134491490,4ptp4l0-21swapper/123:21:561
134491490,3ptp4l0-21swapper/222:32:202
134491490,3ptp4l0-21swapper/219:20:412
134491480,8ptp4l27039-21apt-get19:05:111
134491480,4ptp4l0-21swapper/221:20:242
134491480,3ptp4l0-21swapper/223:56:082
134491480,3ptp4l0-21swapper/221:41:322
29376994618,25cyclictest12757-21seq19:42:493
2937699461,10cyclictest0-21swapper/321:48:213
134491460,3ptp4l0-21swapper/221:10:382
134491460,3ptp4l0-21swapper/220:30:272
134491460,3ptp4l0-21swapper/200:15:262
2937399453,3cyclictest121rcu_preempt21:49:070
2937399450,4cyclictest9-21ksoftirqd/019:45:190
134491450,9ptp4l9-21ksoftirqd/022:01:540
134491450,8ptp4l0-21swapper/200:07:552
134491450,5ptp4l27881-21irqstats19:05:170
134491450,5ptp4l0-21swapper/020:38:580
134491450,4ptp4l9309-21apt-get21:55:140
134491450,4ptp4l0-21swapper/221:19:072
134491450,4ptp4l0-21swapper/220:47:452
134491450,4ptp4l0-21swapper/021:07:140
134491450,3ptp4l0-21swapper/222:40:592
134491450,3ptp4l0-21swapper/221:55:592
134491450,10ptp4l0-21swapper/000:37:260
49162440,4sleep20-21swapper/221:45:142
134491440,9ptp4l0-21swapper/021:03:490
134491440,4ptp4l21822-21iostat_ios23:30:180
134491440,10ptp4l0-21swapper/019:18:510
134491440,10ptp4l0-21swapper/000:11:480
29376994315,12cyclictest11475-21runrttasks23:06:473
2937399430,3cyclictest9-21ksoftirqd/022:29:090
2937399430,2cyclictest121rcu_preempt22:35:360
134491430,9ptp4l0-21swapper/020:59:390
134491430,9ptp4l0-21swapper/000:26:510
134491430,6ptp4l0-21swapper/223:00:182
134491430,5ptp4l0-21swapper/223:30:202
134491430,4ptp4l17438-21memory22:10:221
134491430,4ptp4l0-21swapper/121:57:251
134491430,4ptp4l0-21swapper/100:16:461
29374994236,3cyclictest25-21ksoftirqd/120:25:001
29373994236,3cyclictest9-21ksoftirqd/000:20:010
134491420,9ptp4l0-21swapper/019:53:490
134491420,4ptp4l18535-21apt-get22:15:030
134491420,4ptp4l0-21swapper/300:30:223
134491420,4ptp4l0-21swapper/221:37:152
134491420,4ptp4l0-21swapper/221:08:182
134491420,4ptp4l0-21swapper/122:50:491
134491420,4ptp4l0-21swapper/122:50:491
134491420,4ptp4l0-21swapper/022:50:190
134491420,4ptp4l0-21swapper/022:50:190
134491420,4ptp4l0-21swapper/019:11:550
134491420,3ptp4l23548-21apt-get23:35:122
134491420,3ptp4l0-21swapper/223:43:572
134491420,3ptp4l0-21swapper/200:01:442
134491420,3ptp4l0-21swapper/100:01:181
29376994115,11cyclictest1746-21runrttasks21:38:263
29374994136,3cyclictest25-21ksoftirqd/121:30:001
29374994136,3cyclictest25-21ksoftirqd/121:20:001
29374994129,10cyclictest25-21ksoftirqd/123:40:241
2937399416,3cyclictest9-21ksoftirqd/019:35:000
2937399415,3cyclictest9-21ksoftirqd/023:40:000
29373994136,3cyclictest9-21ksoftirqd/020:55:000
29373994136,3cyclictest9-21ksoftirqd/020:30:210
29373994136,3cyclictest9-21ksoftirqd/020:20:000
2937399411,2cyclictest121rcu_preempt21:40:000
2937399410,2cyclictest121rcu_preempt20:14:430
134491410,5ptp4l11449-21iostat19:40:170
134491410,5ptp4l0-21swapper/021:17:080
134491410,5ptp4l0-21swapper/000:30:200
134491410,4ptp4l31702-21apt-get19:15:142
134491410,4ptp4l0-21swapper/221:54:482
134491410,4ptp4l0-21swapper/123:48:551
134491410,4ptp4l0-21swapper/121:42:231
134491410,4ptp4l0-21swapper/000:21:220
134491410,3ptp4l6879-21file00:07:190
134491410,3ptp4l19540-21ntp_states21:05:243
134491410,3ptp4l0-21swapper/223:12:182
134491410,3ptp4l0-21swapper/023:08:400
2937699408,15cyclictest9997-21ssh19:35:273
2937399404,3cyclictest121rcu_preempt20:40:150
2937399402,4cyclictest9-21ksoftirqd/021:25:190
134491400,5ptp4l21632-21sed20:00:260
134491400,5ptp4l0-21swapper/321:20:123
134491400,4ptp4l8648-21ntp_states00:10:232
134491400,4ptp4l8093-21iostat00:10:181
134491400,4ptp4l15394-21ntp_states23:15:210
134491400,4ptp4l0-21swapper/222:25:012
134491400,4ptp4l0-21swapper/219:35:142
134491400,4ptp4l0-21swapper/023:55:160
134491400,4ptp4l0-21swapper/023:50:490
134491400,4ptp4l0-21swapper/023:41:060
134491400,4ptp4l0-21swapper/022:59:180
134491400,4ptp4l0-21swapper/022:47:180
134491400,4ptp4l0-21swapper/022:30:120
134491400,4ptp4l0-21swapper/022:10:560
134491400,4ptp4l0-21swapper/022:06:240
134491400,4ptp4l0-21swapper/021:51:160
134491400,4ptp4l0-21swapper/021:30:380
134491400,4ptp4l0-21swapper/021:20:450
134491400,4ptp4l0-21swapper/021:12:580
134491400,4ptp4l0-21swapper/020:23:170
134491400,4ptp4l0-21swapper/000:03:400
134491400,3ptp4l0-21swapper/220:05:292
134491400,3ptp4l0-21swapper/122:15:021
29374993928,9cyclictest25-21ksoftirqd/119:35:231
134491390,4ptp4l0-21swapper/319:10:103
134491390,4ptp4l0-21swapper/223:45:122
134491390,4ptp4l0-21swapper/221:25:192
134491390,4ptp4l0-21swapper/123:30:191
134491390,4ptp4l0-21swapper/121:20:161
134491390,4ptp4l0-21swapper/100:06:301
134491390,4ptp4l0-21swapper/023:25:280
134491390,4ptp4l0-21swapper/023:02:500
134491390,4ptp4l0-21swapper/019:28:580
134491390,3ptp4l10259-21iostat_ios23:05:182
134491390,3ptp4l0-21swapper/221:00:262
134491390,3ptp4l0-21swapper/100:20:061
29374993833,3cyclictest25-21ksoftirqd/120:15:001
29374993833,3cyclictest25-21ksoftirqd/100:35:001
29374993832,3cyclictest25-21ksoftirqd/119:20:201
29374993831,5cyclictest25-21ksoftirqd/122:00:131
29374993823,3cyclictest25-21ksoftirqd/123:35:161
134491380,4ptp4l0-21swapper/222:46:162
134491380,4ptp4l0-21swapper/122:06:021
134491380,4ptp4l0-21swapper/121:51:211
134491380,4ptp4l0-21swapper/120:50:071
134491380,4ptp4l0-21swapper/119:45:291
134491380,4ptp4l0-21swapper/019:38:020
134491380,4ptp4l0-21swapper/019:20:190
134491380,3ptp4l27234-21/usr/sbin/munin20:15:162
134491380,3ptp4l0-21swapper/220:40:222
134491380,3ptp4l0-21swapper/123:14:291
134491380,3ptp4l0-21swapper/122:25:591
134491380,3ptp4l0-21swapper/121:48:451
134491380,3ptp4l0-21swapper/121:31:451
134491380,3ptp4l0-21swapper/022:20:200
29374993732,3cyclictest25-21ksoftirqd/123:25:281
29374993732,3cyclictest25-21ksoftirqd/120:15:231
29374993732,3cyclictest25-21ksoftirqd/119:50:181
134491370,4ptp4l22656-21apt20:05:111
134491370,4ptp4l14474-21cstates23:15:121
134491370,4ptp4l0-21swapper/220:10:032
134491370,4ptp4l0-21swapper/122:37:351
134491370,4ptp4l0-21swapper/119:40:321
134491370,4ptp4l0-21swapper/119:31:571
134491370,4ptp4l0-21swapper/119:18:041
134491370,3ptp4l0-21swapper/122:46:151
134491370,3ptp4l0-21swapper/122:40:291
134491370,3ptp4l0-21swapper/121:35:051
134491370,3ptp4l0-21swapper/121:14:171
134491370,3ptp4l0-21swapper/121:05:431
134491370,3ptp4l0-21swapper/120:45:211
134491370,3ptp4l0-21swapper/100:37:241
134491370,2ptp4l0-21swapper/121:01:321
29374993631,3cyclictest25-21ksoftirqd/120:55:151
134491360,3ptp4l0-21swapper/123:53:191
134491360,3ptp4l0-21swapper/123:08:161
134491360,3ptp4l0-21swapper/122:23:381
134491360,3ptp4l0-21swapper/120:02:521
134491360,3ptp4l0-21swapper/119:55:381
134491360,3ptp4l0-21swapper/100:27:331
29374993530,3cyclictest25-21ksoftirqd/119:10:231
134491350,4ptp4l0-21swapper/120:26:081
134491350,3ptp4l0-21swapper/120:30:111
134491350,3ptp4l0-21swapper/119:27:141
29374993429,3cyclictest25-21ksoftirqd/120:40:131
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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