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2026-04-21 - 18:31
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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 Tue Apr 21, 2026 12:45:38)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2271021540,4sleep2651099cyclictest07:45:122
6509997612,62cyclictest11819-21kworker/1:111:25:491
134491620,3ptp4l0-21swapper/010:40:290
650999601,57cyclictest11819-21kworker/1:109:31:091
134491580,22ptp4l9-21ksoftirqd/012:20:190
164082570,3sleep10-21swapper/108:40:151
134491570,4ptp4l0-21swapper/208:47:062
134491570,4ptp4l0-21swapper/108:05:191
134491570,3ptp4l0-21swapper/011:20:130
134491570,3ptp4l0-21swapper/010:20:210
134491560,3ptp4l0-21swapper/311:50:213
134491560,12ptp4l4175-21apt-get07:05:121
134491550,4ptp4l0-21swapper/211:43:352
134491540,4ptp4l0-21swapper/012:04:590
134491530,5ptp4l0-21swapper/209:08:282
134491530,4ptp4l0-21swapper/011:39:350
134491530,4ptp4l0-21swapper/010:06:190
134491530,4ptp4l0-21swapper/007:57:270
134491530,3ptp4l832-21irqrtprio10:25:192
134491530,3ptp4l13875-21perl07:25:160
134491530,3ptp4l0-21swapper/210:57:122
134491530,13ptp4l0-21swapper/008:15:270
134491530,13ptp4l0-21swapper/008:15:270
134491520,4ptp4l0-21swapper/212:01:222
134491520,4ptp4l0-21swapper/211:31:492
134491520,4ptp4l0-21swapper/210:16:332
134491520,4ptp4l0-21swapper/012:30:210
134491520,3ptp4l0-21swapper/207:44:552
134491520,3ptp4l0-21swapper/010:10:140
134491510,5ptp4l0-21swapper/007:07:220
134491510,4ptp4l0-21swapper/010:32:520
134491510,13ptp4l24006-21df12:25:150
134491500,4ptp4l0-21swapper/209:54:322
134491500,4ptp4l0-21swapper/009:45:380
134491500,4ptp4l0-21swapper/009:26:110
134491500,4ptp4l0-21swapper/009:17:220
134491500,4ptp4l0-21swapper/008:55:520
134491500,3ptp4l0-21swapper/012:07:290
134491500,3ptp4l0-21swapper/008:35:310
134491500,3ptp4l0-21swapper/007:22:380
651199493,44cyclictest0-21swapper/309:16:293
134491490,4ptp4l0-21swapper/209:32:172
134491490,3ptp4l0-21swapper/110:54:341
134491490,3ptp4l0-21swapper/009:40:020
134491490,3ptp4l0-21swapper/008:53:180
134491480,4ptp4l0-21swapper/309:08:173
134491480,4ptp4l0-21swapper/010:29:040
134491480,4ptp4l0-21swapper/007:12:170
134491480,3ptp4l0-21swapper/308:29:373
134491480,3ptp4l0-21swapper/211:16:222
134491470,5ptp4l0-21swapper/110:40:181
134491470,4ptp4l0-21swapper/011:45:070
134491470,3ptp4l0-21swapper/210:09:002
134491470,3ptp4l0-21swapper/109:42:471
134491470,10ptp4l0-21swapper/009:04:430
650999460,7cyclictest23622-21apt-get11:15:131
650999460,44cyclictest11819-21kworker/1:109:20:091
134491460,4ptp4l0-21swapper/009:58:510
134491460,4ptp4l0-21swapper/008:44:280
134491460,3ptp4l23778-21diskstats10:05:141
134491460,3ptp4l0-21swapper/011:19:080
651099452,2cyclictest0-21swapper/209:14:382
134491450,5ptp4l0-21swapper/207:09:542
134491450,4ptp4l0-21swapper/110:56:541
134491450,3ptp4l0-21swapper/111:47:531
134491450,3ptp4l0-21swapper/107:16:241
651099441,40cyclictest0-21swapper/208:00:192
134491440,9ptp4l0-21swapper/207:17:192
134491440,4ptp4l0-21swapper/112:12:581
134491440,4ptp4l0-21swapper/007:18:420
134491440,3ptp4l651199cyclictest08:46:563
134491440,3ptp4l0-21swapper/010:56:130
134491440,10ptp4l0-21swapper/208:28:082
134491430,7ptp4l33-21ksoftirqd/211:57:172
134491430,4ptp4l24411-21ntp_states08:55:231
134491430,4ptp4l21326-21apt-get11:10:133
134491430,4ptp4l0-21swapper/108:54:171
134491430,3ptp4l0-21swapper/209:43:482
134491420,5ptp4l6317-21date07:10:003
134491420,5ptp4l22344-21/usr/sbin/munin12:20:191
134491420,5ptp4l0-21swapper/108:30:231
134491420,5ptp4l0-21swapper/108:25:151
134491420,5ptp4l0-21swapper/008:45:130
134491420,5ptp4l0-21swapper/008:05:120
134491420,4ptp4l27056-21ntp_states11:20:222
134491420,4ptp4l25942-21apt-get11:20:123
134491420,4ptp4l25614-21apt-get09:00:122
134491420,4ptp4l22723-21apt-get07:45:131
134491420,4ptp4l22345-21ls11:10:221
134491420,4ptp4l17390-21iostat12:10:170
134491420,4ptp4l16886-21df11:00:141
134491420,4ptp4l12063-21apt-get10:50:130
134491420,4ptp4l0-21swapper/208:20:252
134491420,3ptp4l4774-21apt-get09:25:111
134491420,3ptp4l0-21swapper/112:19:101
134491420,3ptp4l0-21swapper/112:02:331
134491420,3ptp4l0-21swapper/010:45:330
134491410,4ptp4l8595-21users08:20:271
134491410,4ptp4l7647-21iostat_ios09:30:160
134491410,4ptp4l3106-21df_inode11:40:131
134491410,4ptp4l29181-21ntp_states10:15:210
134491410,4ptp4l19609-21ls07:35:271
134491410,4ptp4l18973-21apt-get11:05:122
134491410,4ptp4l16856-21iostat09:50:170
134491410,4ptp4l12176-21ls07:20:201
134491410,4ptp4l1212-21memory10:25:221
134491410,4ptp4l0-21swapper/312:24:473
134491410,4ptp4l0-21swapper/309:51:003
134491410,4ptp4l0-21swapper/210:12:502
134491410,4ptp4l0-21swapper/011:26:490
134491410,4ptp4l0-21swapper/009:05:580
134491410,4ptp4l0-21swapper/008:30:120
134491410,4ptp4l0-21swapper/008:24:290
134491410,3ptp4l368-21apt-get11:35:131
134491410,3ptp4l27420-21ntp_states12:30:231
134491410,3ptp4l21172-21apt-get10:00:100
134491410,3ptp4l14389-21iostat_ios08:35:191
134491410,3ptp4l13454-21apt-get07:25:111
134491410,3ptp4l0-21swapper/308:38:093
6511994034,4cyclictest41-21ksoftirqd/310:35:263
134491400,6ptp4l0-21swapper/207:23:392
134491400,5ptp4l21537-21grep07:40:240
134491400,5ptp4l21217-21cron12:20:000
134491400,5ptp4l20468-21wc11:05:283
134491400,5ptp4l0-21swapper/311:46:073
134491400,5ptp4l0-21swapper/311:31:233
134491400,5ptp4l0-21swapper/211:46:272
134491400,5ptp4l0-21swapper/210:40:262
134491400,5ptp4l0-21swapper/209:59:262
134491400,5ptp4l0-21swapper/111:05:241
134491400,5ptp4l0-21swapper/011:55:190
134491400,5ptp4l0-21swapper/011:40:110
134491400,4ptp4l9078-21users11:50:291
134491400,4ptp4l32056-21users10:20:291
134491400,4ptp4l27063-21cron07:55:011
134491400,4ptp4l19173-21ntp_states07:35:230
134491400,4ptp4l0-21swapper/311:01:123
134491400,4ptp4l0-21swapper/310:54:303
134491400,4ptp4l0-21swapper/309:35:253
134491400,4ptp4l0-21swapper/309:31:453
134491400,4ptp4l0-21swapper/309:10:243
134491400,4ptp4l0-21swapper/308:21:283
134491400,4ptp4l0-21swapper/308:17:503
134491400,4ptp4l0-21swapper/308:17:503
134491400,4ptp4l0-21swapper/211:51:182
134491400,4ptp4l0-21swapper/211:14:132
134491400,4ptp4l0-21swapper/211:04:122
134491400,4ptp4l0-21swapper/210:30:322
134491400,4ptp4l0-21swapper/209:45:222
134491400,4ptp4l0-21swapper/209:24:142
134491400,4ptp4l0-21swapper/208:50:292
134491400,4ptp4l0-21swapper/208:05:082
134491400,4ptp4l0-21swapper/109:55:191
134491400,4ptp4l0-21swapper/109:10:151
134491400,4ptp4l0-21swapper/011:30:140
134491400,4ptp4l0-21swapper/011:05:040
134491400,4ptp4l0-21swapper/011:01:180
134491400,4ptp4l0-21swapper/010:39:290
134491400,4ptp4l0-21swapper/009:36:310
134491400,4ptp4l0-21swapper/008:25:580
134491400,4ptp4l0-21swapper/007:45:150
134491400,3ptp4l9942-21iostat09:35:181
134491400,3ptp4l4910-21diskstats08:15:151
134491400,3ptp4l4910-21diskstats08:15:151
134491400,3ptp4l31879-21users09:10:280
134491400,3ptp4l26881-21ls11:20:201
134491400,3ptp4l26199-21hddtemp_smartct10:10:161
134491400,3ptp4l25838-21apt-get12:30:032
134491400,3ptp4l25543-21sshd12:26:171
134491400,3ptp4l20860-21hddtemp_smartct07:40:181
134491400,3ptp4l19070-21hddtemp_smartct08:45:151
134491400,3ptp4l16060-21diskstats07:30:141
134491400,3ptp4l0-21swapper/207:54:532
134491400,3ptp4l0-21swapper/011:50:140
134491400,2ptp4l3130-21strings08:10:211
6510993933,4cyclictest33-21ksoftirqd/208:56:282
134491390,5ptp4l7528-21grep07:10:201
134491390,5ptp4l29168-21awk09:05:241
134491390,5ptp4l0-21swapper/212:10:222
134491390,5ptp4l0-21swapper/208:40:242
134491390,5ptp4l0-21swapper/208:30:482
134491390,5ptp4l0-21swapper/009:21:260
134491390,5ptp4l0-21swapper/008:14:500
134491390,4ptp4l17134-21irqstats09:50:191
134491390,4ptp4l0-21swapper/312:09:583
134491390,4ptp4l0-21swapper/312:05:003
134491390,4ptp4l0-21swapper/311:40:013
134491390,4ptp4l0-21swapper/311:35:263
134491390,4ptp4l0-21swapper/311:26:133
134491390,4ptp4l0-21swapper/310:47:073
134491390,4ptp4l0-21swapper/310:30:213
134491390,4ptp4l0-21swapper/310:12:363
134491390,4ptp4l0-21swapper/309:45:133
134491390,4ptp4l0-21swapper/309:42:593
134491390,4ptp4l0-21swapper/309:28:133
134491390,4ptp4l0-21swapper/308:53:293
134491390,4ptp4l0-21swapper/308:40:233
134491390,4ptp4l0-21swapper/308:30:273
134491390,4ptp4l0-21swapper/308:11:533
134491390,4ptp4l0-21swapper/307:17:203
134491390,4ptp4l0-21swapper/212:35:192
134491390,4ptp4l0-21swapper/212:07:052
134491390,4ptp4l0-21swapper/211:35:142
134491390,4ptp4l0-21swapper/211:25:362
134491390,4ptp4l0-21swapper/210:50:182
134491390,4ptp4l0-21swapper/210:46:342
134491390,4ptp4l0-21swapper/210:35:172
134491390,4ptp4l0-21swapper/210:20:192
134491390,4ptp4l0-21swapper/209:25:042
134491390,4ptp4l0-21swapper/209:15:162
134491390,4ptp4l0-21swapper/208:35:142
134491390,4ptp4l0-21swapper/208:10:112
134491390,4ptp4l0-21swapper/207:36:182
134491390,4ptp4l0-21swapper/207:32:092
134491390,4ptp4l0-21swapper/112:35:241
134491390,4ptp4l0-21swapper/111:59:331
134491390,4ptp4l0-21swapper/110:30:081
134491390,4ptp4l0-21swapper/110:00:251
134491390,4ptp4l0-21swapper/109:15:291
134491390,4ptp4l0-21swapper/109:00:151
134491390,4ptp4l0-21swapper/108:00:301
134491390,4ptp4l0-21swapper/107:57:231
134491390,4ptp4l0-21swapper/012:35:050
134491390,4ptp4l0-21swapper/011:11:400
134491390,4ptp4l0-21swapper/008:00:130
134491390,4ptp4l0-21swapper/007:52:250
134491390,4ptp4l0-21swapper/007:30:100
134491390,3ptp4l24742-21ntp_states11:15:243
134491390,3ptp4l21710-21df12:20:142
134491390,3ptp4l14563-21iostat_ios09:45:181
134491390,3ptp4l0-21swapper/207:57:072
134491390,3ptp4l0-21swapper/110:36:001
134491380,5ptp4l1301-21snmpd10:02:313
134491380,4ptp4l3200-21irqrtprio09:20:183
134491380,4ptp4l0-21swapper/312:35:143
134491380,4ptp4l0-21swapper/312:30:013
134491380,4ptp4l0-21swapper/312:17:213
134491380,4ptp4l0-21swapper/311:57:093
134491380,4ptp4l0-21swapper/310:57:533
134491380,4ptp4l0-21swapper/310:40:463
134491380,4ptp4l0-21swapper/310:25:233
134491380,4ptp4l0-21swapper/310:23:453
134491380,4ptp4l0-21swapper/310:15:163
134491380,4ptp4l0-21swapper/310:05:303
134491380,4ptp4l0-21swapper/309:00:223
134491380,4ptp4l0-21swapper/308:00:353
134491380,4ptp4l0-21swapper/307:56:523
134491380,4ptp4l0-21swapper/307:41:493
134491380,4ptp4l0-21swapper/307:24:143
134491380,4ptp4l0-21swapper/212:26:212
134491380,4ptp4l0-21swapper/212:15:572
134491380,4ptp4l0-21swapper/210:02:402
134491380,4ptp4l0-21swapper/209:36:482
134491380,4ptp4l0-21swapper/208:16:072
134491380,4ptp4l0-21swapper/208:16:072
134491380,4ptp4l0-21swapper/207:26:532
134491380,4ptp4l0-21swapper/207:11:092
134491380,4ptp4l0-21swapper/112:06:431
134491380,4ptp4l0-21swapper/111:30:061
134491380,4ptp4l0-21swapper/110:45:161
134491380,3ptp4l0-21swapper/312:10:153
134491380,3ptp4l0-21swapper/308:05:273
134491380,17ptp4l25-21ksoftirqd/110:17:411
134491370,4ptp4l0-21swapper/309:55:363
134491370,4ptp4l0-21swapper/308:55:123
134491370,4ptp4l0-21swapper/307:46:313
134491370,4ptp4l0-21swapper/307:36:043
134491370,3ptp4l0-21swapper/307:11:533
134491360,4ptp4l0-21swapper/307:33:243
134491360,3ptp4l0-21swapper/312:29:513
134491350,3ptp4l0-21swapper/307:26:193
134491260,4ptp4l0-21swapper/307:54:383
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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