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2026-04-08 - 15:15
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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 Wed Apr 08, 2026 12:45:36)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
7352997837,7cyclictest41-21ksoftirqd/310:20:013
7351997331,3cyclictest33-21ksoftirqd/212:35:282
7352997233,4cyclictest41-21ksoftirqd/312:20:003
7352997127,9cyclictest41-21ksoftirqd/311:15:163
7352996920,8cyclictest41-21ksoftirqd/307:40:003
7352996835,4cyclictest41-21ksoftirqd/308:40:153
7352996827,4cyclictest41-21ksoftirqd/310:30:143
7349996832,4cyclictest9-21ksoftirqd/009:30:170
7352996634,4cyclictest41-21ksoftirqd/309:25:003
7352996626,8cyclictest41-21ksoftirqd/307:52:193
7351996533,5cyclictest33-21ksoftirqd/211:45:242
7352996432,4cyclictest41-21ksoftirqd/310:20:233
7352996429,3cyclictest41-21ksoftirqd/307:20:123
7352996426,4cyclictest41-21ksoftirqd/311:05:143
7352996426,4cyclictest41-21ksoftirqd/308:10:213
7351996431,23cyclictest33-21ksoftirqd/209:55:012
7351996430,7cyclictest33-21ksoftirqd/207:50:172
7351996430,5cyclictest33-21ksoftirqd/207:26:442
7349996426,8cyclictest9-21ksoftirqd/011:33:340
7352996328,6cyclictest41-21ksoftirqd/309:00:273
7351996332,3cyclictest33-21ksoftirqd/209:55:202
7351996330,4cyclictest33-21ksoftirqd/212:30:012
7351996330,3cyclictest33-21ksoftirqd/207:10:142
7351996329,9cyclictest33-21ksoftirqd/209:10:192
7351996329,9cyclictest33-21ksoftirqd/209:10:192
7351996328,5cyclictest33-21ksoftirqd/209:02:362
7351996324,7cyclictest33-21ksoftirqd/207:15:232
7349996331,6cyclictest9-21ksoftirqd/007:15:240
7349996324,5cyclictest9-21ksoftirqd/010:40:000
7352996231,3cyclictest41-21ksoftirqd/309:30:153
7352996230,3cyclictest41-21ksoftirqd/309:45:003
7352996230,3cyclictest41-21ksoftirqd/309:45:003
735299622,6cyclictest0-21swapper/312:39:423
735299622,6cyclictest0-21swapper/309:14:433
735299622,6cyclictest0-21swapper/309:14:423
7351996235,3cyclictest33-21ksoftirqd/211:10:182
735199623,3cyclictest121rcu_preempt12:05:252
7351996228,6cyclictest33-21ksoftirqd/207:35:212
7351996228,4cyclictest33-21ksoftirqd/208:36:262
7351996224,7cyclictest33-21ksoftirqd/209:40:232
7351996224,7cyclictest33-21ksoftirqd/209:40:232
7349996233,4cyclictest9-21ksoftirqd/010:04:590
7349996226,5cyclictest9-21ksoftirqd/007:27:190
7349996225,10cyclictest9-21ksoftirqd/007:22:540
7352996131,3cyclictest41-21ksoftirqd/311:40:273
7352996128,4cyclictest41-21ksoftirqd/312:00:173
7352996128,3cyclictest41-21ksoftirqd/307:45:183
7352996127,7cyclictest41-21ksoftirqd/311:50:183
7352996125,7cyclictest41-21ksoftirqd/311:55:053
7351996131,7cyclictest33-21ksoftirqd/209:24:502
7351996130,8cyclictest33-21ksoftirqd/209:25:152
7349996126,5cyclictest9-21ksoftirqd/010:19:220
7349996122,6cyclictest9-21ksoftirqd/009:40:000
134491610,5ptp4l0-21swapper/207:06:262
7352996031,6cyclictest41-21ksoftirqd/310:55:163
7352996023,8cyclictest41-21ksoftirqd/311:28:383
7352996023,3cyclictest41-21ksoftirqd/310:40:003
7352996021,3cyclictest41-21ksoftirqd/312:05:223
7351996031,7cyclictest33-21ksoftirqd/207:58:202
7351996030,8cyclictest33-21ksoftirqd/210:18:192
7351996030,4cyclictest33-21ksoftirqd/207:40:242
7351996028,4cyclictest33-21ksoftirqd/212:16:442
7351996028,4cyclictest33-21ksoftirqd/209:45:242
7351996026,4cyclictest33-21ksoftirqd/210:33:492
7351996018,3cyclictest33-21ksoftirqd/209:18:442
7349996031,10cyclictest9-21ksoftirqd/008:35:190
7349996029,3cyclictest9-21ksoftirqd/008:50:170
7352995925,8cyclictest41-21ksoftirqd/309:55:013
7352995923,8cyclictest41-21ksoftirqd/312:11:553
7351995932,4cyclictest33-21ksoftirqd/207:20:182
7351995929,3cyclictest33-21ksoftirqd/211:35:072
7351995927,5cyclictest33-21ksoftirqd/207:47:022
7351995925,4cyclictest33-21ksoftirqd/211:27:212
7351995925,3cyclictest33-21ksoftirqd/210:10:262
7349995930,4cyclictest9-21ksoftirqd/011:39:590
7349995929,8cyclictest9-21ksoftirqd/009:03:110
7349995926,7cyclictest9-21ksoftirqd/008:14:170
7349995922,5cyclictest9-21ksoftirqd/009:22:250
7349995919,4cyclictest9-21ksoftirqd/009:19:520
56352590,4sleep35638-21fschecks_time08:15:153
7352995829,9cyclictest41-21ksoftirqd/307:25:183
7352995828,3cyclictest41-21ksoftirqd/308:20:263
7352995826,9cyclictest41-21ksoftirqd/311:45:253
7352995826,4cyclictest41-21ksoftirqd/309:05:243
7351995830,3cyclictest33-21ksoftirqd/209:34:362
7351995828,6cyclictest33-21ksoftirqd/209:35:222
7351995826,7cyclictest33-21ksoftirqd/208:45:232
7351995821,4cyclictest33-21ksoftirqd/211:30:122
7349995828,9cyclictest9-21ksoftirqd/007:50:000
7349995828,4cyclictest9-21ksoftirqd/010:13:460
7352995727,8cyclictest41-21ksoftirqd/308:25:283
7352995723,9cyclictest41-21ksoftirqd/307:55:163
7351995734,4cyclictest33-21ksoftirqd/208:05:002
7351995726,5cyclictest33-21ksoftirqd/207:33:502
7351995725,4cyclictest33-21ksoftirqd/208:10:132
7351995725,4cyclictest33-21ksoftirqd/208:05:152
7351995724,4cyclictest33-21ksoftirqd/211:44:152
7351995723,6cyclictest33-21ksoftirqd/208:29:422
7351995723,3cyclictest33-21ksoftirqd/208:30:202
7351995720,4cyclictest33-21ksoftirqd/211:20:142
7349995729,7cyclictest9-21ksoftirqd/011:54:440
7349995727,11cyclictest9-21ksoftirqd/009:42:270
7349995727,11cyclictest9-21ksoftirqd/009:42:270
7349995726,3cyclictest9-21ksoftirqd/007:56:190
7349995725,9cyclictest9-21ksoftirqd/011:47:340
7349995724,7cyclictest9-21ksoftirqd/012:20:200
7349995724,4cyclictest9-21ksoftirqd/008:45:000
7349995723,5cyclictest9-21ksoftirqd/010:51:470
7349995720,6cyclictest9-21ksoftirqd/012:31:440
134491570,4ptp4l0-21swapper/109:52:550
7352995624,6cyclictest41-21ksoftirqd/309:15:143
7352995619,6cyclictest41-21ksoftirqd/309:51:373
7351995633,15cyclictest33-21ksoftirqd/208:25:012
7351995627,16cyclictest33-21ksoftirqd/211:20:012
7351995625,3cyclictest33-21ksoftirqd/210:48:202
735199560,2cyclictest17130-21sendmail-msp11:00:012
7349995627,4cyclictest9-21ksoftirqd/010:09:050
7349995626,8cyclictest9-21ksoftirqd/009:59:550
7349995624,7cyclictest9-21ksoftirqd/009:26:480
7349995624,3cyclictest9-21ksoftirqd/012:25:140
734999560,2cyclictest121rcu_preempt10:30:010
134491560,5ptp4l0-21swapper/108:50:131
134491560,4ptp4l0-21swapper/012:16:260
7352995527,4cyclictest41-21ksoftirqd/310:00:223
7352995523,8cyclictest41-21ksoftirqd/308:05:243
7352995521,3cyclictest41-21ksoftirqd/309:25:263
7351995536,3cyclictest33-21ksoftirqd/212:35:012
7351995527,3cyclictest33-21ksoftirqd/210:00:092
7351995526,5cyclictest33-21ksoftirqd/211:00:112
7351995521,8cyclictest33-21ksoftirqd/212:21:012
7351995517,8cyclictest33-21ksoftirqd/210:43:002
7349995534,8cyclictest9-21ksoftirqd/011:40:230
7349995530,7cyclictest9-21ksoftirqd/010:44:050
7349995527,4cyclictest9-21ksoftirqd/011:56:530
7349995524,5cyclictest9-21ksoftirqd/012:07:210
7349995522,8cyclictest9-21ksoftirqd/007:50:160
7349995522,4cyclictest9-21ksoftirqd/012:01:150
7349995521,8cyclictest9-21ksoftirqd/008:09:240
7349995521,6cyclictest9-21ksoftirqd/012:35:130
7349995516,7cyclictest9-21ksoftirqd/008:25:230
7352995424,4cyclictest41-21ksoftirqd/308:30:263
7352995423,3cyclictest41-21ksoftirqd/310:50:233
7352995421,3cyclictest41-21ksoftirqd/308:35:153
7351995427,3cyclictest33-21ksoftirqd/212:01:522
7351995423,4cyclictest33-21ksoftirqd/211:53:542
7349995434,8cyclictest9-21ksoftirqd/007:35:240
7349995420,4cyclictest9-21ksoftirqd/012:14:590
7349995418,5cyclictest9-21ksoftirqd/007:14:190
134491540,3ptp4l0-21swapper/008:45:160
7352995322,8cyclictest41-21ksoftirqd/312:20:263
7351995334,7cyclictest33-21ksoftirqd/208:17:502
7351995328,6cyclictest33-21ksoftirqd/210:05:042
7351995328,3cyclictest33-21ksoftirqd/210:20:182
7351995322,3cyclictest33-21ksoftirqd/210:26:292
7349995325,7cyclictest9-21ksoftirqd/010:30:180
7349995321,4cyclictest9-21ksoftirqd/011:05:120
7349995319,7cyclictest9-21ksoftirqd/011:25:440
7349995314,6cyclictest9-21ksoftirqd/010:55:220
7349995313,6cyclictest9-21ksoftirqd/008:15:220
134491530,3ptp4l0-21swapper/112:27:021
735299522,6cyclictest0-21swapper/311:35:183
735299522,6cyclictest0-21swapper/307:32:403
7352995224,3cyclictest41-21ksoftirqd/309:35:133
7352995220,8cyclictest41-21ksoftirqd/311:00:283
7351995225,10cyclictest33-21ksoftirqd/208:53:062
7351995214,8cyclictest33-21ksoftirqd/210:52:432
7349995232,9cyclictest9-21ksoftirqd/011:20:240
7349995225,7cyclictest9-21ksoftirqd/008:30:260
7349995219,7cyclictest9-21ksoftirqd/010:45:180
134491520,4ptp4l0-21swapper/109:33:291
7352995135,6cyclictest41-21ksoftirqd/310:39:593
735299512,7cyclictest0-21swapper/308:50:233
735299512,6cyclictest0-21swapper/310:25:223
7352995124,6cyclictest41-21ksoftirqd/311:10:213
7352995122,3cyclictest41-21ksoftirqd/307:40:273
7351995135,7cyclictest33-21ksoftirqd/208:40:132
7349995123,6cyclictest9-21ksoftirqd/010:21:330
7349995122,4cyclictest9-21ksoftirqd/008:59:590
7349995116,6cyclictest9-21ksoftirqd/007:40:160
134491510,4ptp4l0-21swapper/009:47:130
7351995040,3cyclictest33-21ksoftirqd/212:10:142
7351995035,4cyclictest33-21ksoftirqd/211:55:192
7351995031,9cyclictest33-21ksoftirqd/208:55:262
7351995029,9cyclictest33-21ksoftirqd/209:09:102
7351995019,3cyclictest33-21ksoftirqd/210:37:182
7349995032,5cyclictest9-21ksoftirqd/009:10:000
7349995021,8cyclictest9-21ksoftirqd/008:00:480
7349995013,5cyclictest9-21ksoftirqd/011:00:130
236592500,4sleep10-21swapper/107:45:001
7351994932,5cyclictest33-21ksoftirqd/211:06:202
7349994931,8cyclictest9-21ksoftirqd/009:10:170
7349994931,8cyclictest9-21ksoftirqd/009:10:170
7349994921,4cyclictest9-21ksoftirqd/011:19:380
7349994915,7cyclictest9-21ksoftirqd/008:25:010
134491490,4ptp4l0-21swapper/111:53:121
134491490,11ptp4l6127-21ntp_states07:05:213
7352994828,6cyclictest41-21ksoftirqd/309:45:273
7352994826,7cyclictest41-21ksoftirqd/311:25:013
7352994811,9cyclictest41-21ksoftirqd/312:25:293
7349994828,8cyclictest9-21ksoftirqd/011:13:300
134491480,4ptp4l0-21swapper/111:47:051
134491480,4ptp4l0-21swapper/110:16:531
134491480,4ptp4l0-21swapper/109:25:181
735299475,8cyclictest41-21ksoftirqd/310:45:173
7352994732,4cyclictest41-21ksoftirqd/307:15:233
7349994718,8cyclictest9-21ksoftirqd/007:32:560
134491470,8ptp4l0-21swapper/107:31:491
134491470,4ptp4l0-21swapper/108:17:051
7352994632,3cyclictest41-21ksoftirqd/308:55:123
735299460,2cyclictest121rcu_preempt07:10:143
7352994535,2cyclictest41-21ksoftirqd/308:00:183
7352994532,6cyclictest41-21ksoftirqd/310:05:233
7352994529,7cyclictest41-21ksoftirqd/311:35:003
735299450,2cyclictest121rcu_preempt12:30:143
134491450,4ptp4l0-21swapper/111:27:481
735299445,2cyclictest41-21ksoftirqd/308:45:183
134491440,4ptp4l0-21swapper/107:20:291
134491440,3ptp4l0-21swapper/108:32:341
134491430,6ptp4l3806-21iostat_ios10:30:171
134491430,4ptp4l0-21swapper/110:00:431
134491430,3ptp4l0-21swapper/111:38:261
134491430,3ptp4l0-21swapper/109:14:301
134491430,3ptp4l0-21swapper/109:14:291
134491430,3ptp4l0-21swapper/107:58:161
134491420,4ptp4l18516-21ls09:50:281
134491420,3ptp4l0-21swapper/310:10:123
134491410,4ptp4l845-21diskstats08:05:141
134491410,4ptp4l8389-21irqstats08:20:181
134491410,4ptp4l26937-21iostat10:10:171
134491410,4ptp4l23245-21ntp_states12:20:221
134491410,4ptp4l10196-21df09:35:141
7350994035,3cyclictest25-21ksoftirqd/111:20:011
7350994024,4cyclictest25-21ksoftirqd/112:35:271
134491400,5ptp4l0-21swapper/112:30:261
134491400,5ptp4l0-21swapper/111:55:121
134491400,5ptp4l0-21swapper/111:00:171
134491400,5ptp4l0-21swapper/108:45:131
134491400,5ptp4l0-21swapper/107:45:191
134491400,4ptp4l6608-21/usr/sbin/munin10:35:231
134491400,4ptp4l2922-21apt-get08:10:121
134491400,4ptp4l24641-21iostat10:05:171
134491400,4ptp4l2012-21ntp_states10:25:231
134491400,4ptp4l19007-21apt-get09:55:031
134491400,4ptp4l14497-21apt-get10:55:021
134491400,4ptp4l12873-21iostat_ios09:40:171
134491400,4ptp4l12873-21iostat_ios09:40:171
134491400,4ptp4l11510-21users08:25:291
134491400,4ptp4l0-21swapper/109:00:131
134491400,3ptp4l2877-21apt-get09:20:111
134491400,3ptp4l21478-21users12:15:271
134491390,4ptp4l27912-21ntp_states11:20:231
134491390,4ptp4l13959-21ntpq12:00:191
134491390,4ptp4l0-21swapper/111:40:251
134491390,4ptp4l0-21swapper/111:05:121
134491390,4ptp4l0-21swapper/110:50:101
134491390,4ptp4l0-21swapper/110:22:021
134491390,4ptp4l0-21swapper/107:52:141
134491390,4ptp4l0-21swapper/107:38:431
134491390,4ptp4l0-21swapper/107:10:411
134491390,3ptp4l9985-21diskstats07:15:151
134491390,3ptp4l30974-21df_inode08:00:141
134491390,3ptp4l23022-21irqstats11:10:191
134491390,3ptp4l15001-21iostat_ios08:35:181
134491390,3ptp4l1051-21iostat_ios09:15:161
134491390,3ptp4l0-21swapper/109:05:191
134491380,4ptp4l0-21swapper/112:12:591
134491380,4ptp4l0-21swapper/111:33:241
134491380,4ptp4l0-21swapper/110:45:161
134491380,4ptp4l0-21swapper/108:55:081
134491380,4ptp4l0-21swapper/108:41:171
134491380,3ptp4l16126-21sshd07:26:431
134491380,3ptp4l0-21swapper/112:05:201
134491370,4ptp4l0-21swapper/109:45:111
134491370,3ptp4l8795-21/usr/sbin/munin10:40:181
64442133,5sleep00-21swapper/007:05:250
53162124,4sleep10-21swapper/107:05:141
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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