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2026-04-02 - 00:43
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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 Wed Apr 01, 2026 12:45:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
134491610,4ptp4l15260-21/usr/sbin/munin10:25:200
134491600,5ptp4l0-21swapper/209:15:232
134491600,3ptp4l0-21swapper/109:00:181
134491590,10ptp4l18866-21iostat_ios07:05:180
134491580,4ptp4l21979-21mailstats07:10:250
134491570,4ptp4l0-21swapper/312:16:083
134491570,3ptp4l0-21swapper/009:30:250
134491560,3ptp4l0-21swapper/311:51:253
134491560,3ptp4l0-21swapper/110:45:261
134491550,4ptp4l0-21swapper/312:36:323
134491550,4ptp4l0-21swapper/008:00:020
134491550,3ptp4l0-21swapper/207:45:132
134491550,13ptp4l0-21swapper/012:25:210
134491540,6ptp4l0-21swapper/107:08:001
134491540,4ptp4l0-21swapper/011:13:480
134491530,4ptp4l0-21swapper/011:09:570
134491520,4ptp4l0-21swapper/107:36:081
134491520,3ptp4l0-21swapper/010:20:150
134491520,3ptp4l0-21swapper/009:48:180
134491520,3ptp4l0-21swapper/007:25:530
134491510,4ptp4l0-21swapper/308:14:053
134491510,4ptp4l0-21swapper/012:22:450
134491510,4ptp4l0-21swapper/011:36:290
134491510,4ptp4l0-21swapper/010:50:170
134491510,3ptp4l0-21swapper/210:24:112
134491510,3ptp4l0-21swapper/008:45:260
134491500,4ptp4l0-21swapper/309:23:403
134491500,4ptp4l0-21swapper/110:59:261
134491500,3ptp4l0-21swapper/011:20:230
134491490,5ptp4l33-21ksoftirqd/208:42:232
134491490,4ptp4l0-21swapper/211:51:422
134491490,4ptp4l0-21swapper/209:14:102
134491490,4ptp4l0-21swapper/010:40:570
134491490,4ptp4l0-21swapper/007:18:130
134491490,3ptp4l0-21swapper/011:41:310
2062899481,3cyclictest121rcu_preempt08:39:033
134491480,4ptp4l0-21swapper/208:25:232
134491480,4ptp4l0-21swapper/109:33:211
134491480,4ptp4l0-21swapper/107:22:011
134491480,4ptp4l0-21swapper/009:50:580
134491480,3ptp4l0-21swapper/210:55:282
134491480,3ptp4l0-21swapper/210:12:422
134491480,12ptp4l0-21swapper/207:50:072
134491470,4ptp4l20834-21apt-get08:20:132
134491470,4ptp4l0-21swapper/309:57:003
134491470,4ptp4l0-21swapper/308:06:193
134491470,4ptp4l0-21swapper/109:12:531
134491470,4ptp4l0-21swapper/011:16:260
134491470,3ptp4l0-21swapper/211:47:302
134491470,3ptp4l0-21swapper/208:49:192
134491460,4ptp4l0-21swapper/208:17:462
134491460,4ptp4l0-21swapper/007:32:250
134491460,3ptp4l0-21swapper/308:20:193
134491460,3ptp4l0-21swapper/212:22:542
134491460,3ptp4l0-21swapper/212:09:202
134491460,12ptp4l15219-21fschecks_time11:35:161
2062899452,2cyclictest121rcu_preempt07:41:463
2062899452,2cyclictest121rcu_preempt07:41:463
2062899450,3cyclictest121rcu_preempt12:07:563
2062899450,2cyclictest121rcu_preempt12:30:593
20626994539,3cyclictest25-21ksoftirqd/110:20:011
134491450,9ptp4l0-21swapper/210:29:562
134491450,5ptp4l0-21swapper/209:35:122
134491450,4ptp4l0-21swapper/310:16:263
134491450,4ptp4l0-21swapper/110:04:581
134491450,4ptp4l0-21swapper/008:30:140
134491450,3ptp4l0-21swapper/308:40:513
134491450,3ptp4l0-21swapper/110:31:441
134491450,3ptp4l0-21swapper/012:30:170
134491450,11ptp4l0-21swapper/109:29:471
134491450,10ptp4l0-21swapper/212:28:542
134491450,10ptp4l0-21swapper/009:23:210
2062899441,3cyclictest121rcu_preempt10:48:243
2062899441,3cyclictest121rcu_preempt10:12:473
2062899440,2cyclictest121rcu_preempt08:02:013
134491440,9ptp4l0-21swapper/211:10:462
134491440,9ptp4l0-21swapper/111:48:201
134491440,4ptp4l0-21swapper/307:26:123
134491440,4ptp4l0-21swapper/208:57:352
134491440,4ptp4l0-21swapper/207:58:492
134491440,4ptp4l0-21swapper/009:38:310
134491440,10ptp4l0-21swapper/308:34:123
134491440,10ptp4l0-21swapper/112:11:311
134491440,10ptp4l0-21swapper/112:11:311
2062899431,3cyclictest121rcu_preempt10:32:483
2062899430,3cyclictest121rcu_preempt11:14:283
2062899430,3cyclictest121rcu_preempt09:03:313
2062899430,2cyclictest121rcu_preempt11:09:363
134491430,9ptp4l0-21swapper/211:25:342
134491430,4ptp4l0-21swapper/308:26:393
134491430,4ptp4l0-21swapper/208:39:412
134491430,4ptp4l0-21swapper/008:50:320
134491430,2ptp4l12922-21memory09:10:210
134491430,10ptp4l0-21swapper/008:20:380
2062899421,3cyclictest121rcu_preempt07:21:323
2062899421,2cyclictest121rcu_preempt09:29:453
2062899420,2cyclictest121rcu_preempt07:54:313
134491420,9ptp4l0-21swapper/211:02:262
134491420,9ptp4l0-21swapper/209:41:192
134491420,9ptp4l0-21swapper/209:30:342
134491420,5ptp4l24068-21ntp_states07:15:223
134491420,5ptp4l1927-21irqstats12:15:191
134491420,5ptp4l0-21swapper/312:00:183
134491420,5ptp4l0-21swapper/311:20:153
134491420,5ptp4l0-21swapper/310:05:213
134491420,5ptp4l0-21swapper/009:25:200
134491420,4ptp4l30817-21meminfo07:30:201
134491420,4ptp4l26800-21hddtemp_smartct12:00:151
134491420,4ptp4l1837-21ntp_states11:05:241
134491420,4ptp4l0-21swapper/312:20:073
134491420,4ptp4l0-21swapper/011:03:200
134491420,3ptp4l0-21swapper/010:35:320
134491420,10ptp4l0-21swapper/207:43:012
134491420,10ptp4l0-21swapper/207:43:012
2062899410,2cyclictest121rcu_preempt08:50:583
2062899410,2cyclictest121rcu_preempt08:16:323
2062799411,2cyclictest134491ptp4l07:30:142
134491410,9ptp4l0-21swapper/211:39:152
134491410,5ptp4l12760-21df11:30:150
134491410,5ptp4l0-21swapper/111:15:171
134491410,4ptp4l9656-21iostat_ios07:55:170
134491410,4ptp4l7869-21df_inode10:10:161
134491410,4ptp4l6609-21sensors10:05:262
134491410,4ptp4l5696-21hddtemp_smartct10:05:171
134491410,4ptp4l5276-21hddtemp_smartct08:55:171
134491410,4ptp4l4643-21users10:00:290
134491410,4ptp4l30190-21apt-get09:50:031
134491410,4ptp4l2476-21/usr/sbin/munin08:50:152
134491410,4ptp4l24054-21iostat_ios09:35:181
134491410,4ptp4l20968-21diskstats07:10:161
134491410,4ptp4l19075-21iostat08:15:190
134491410,4ptp4l17431-21irqstats09:20:201
134491410,4ptp4l10171-21diskstats10:15:140
134491410,4ptp4l10087-21fschecks_time09:05:150
134491410,4ptp4l0-21swapper/211:40:512
134491410,4ptp4l0-21swapper/112:30:151
134491410,3ptp4l9085-21apt-get07:55:123
134491410,3ptp4l3706-21ls07:40:251
134491410,3ptp4l3706-21ls07:40:251
134491410,3ptp4l29312-21hddtemp_smartct12:05:161
134491410,3ptp4l23110-21ls10:40:271
134491410,3ptp4l101ktimersoftd/007:53:460
20628994034,3cyclictest41-21ksoftirqd/309:10:003
2062899401,3cyclictest121rcu_preempt11:27:363
2062899401,2cyclictest121rcu_preempt12:10:203
2062899401,2cyclictest121rcu_preempt12:10:203
2062899401,2cyclictest121rcu_preempt10:00:103
2062899400,3cyclictest121rcu_preempt09:39:403
2062899400,3cyclictest121rcu_preempt07:49:373
20627994035,3cyclictest33-21ksoftirqd/212:05:002
134491400,5ptp4l8386-21cut10:10:190
134491400,5ptp4l5684-21/usr/sbin/munin07:45:230
134491400,5ptp4l0-21swapper/209:45:172
134491400,5ptp4l0-21swapper/112:25:171
134491400,5ptp4l0-21swapper/110:35:161
134491400,5ptp4l0-21swapper/108:10:211
134491400,5ptp4l0-21swapper/107:53:521
134491400,4ptp4l5860-21apt-config12:25:013
134491400,4ptp4l3336-21irqstats08:50:181
134491400,4ptp4l25269-21ps11:55:262
134491400,4ptp4l20371-21ls11:45:210
134491400,4ptp4l0-21swapper/311:55:183
134491400,4ptp4l0-21swapper/311:45:133
134491400,4ptp4l0-21swapper/307:35:293
134491400,4ptp4l0-21swapper/211:19:572
134491400,4ptp4l0-21swapper/210:51:022
134491400,4ptp4l0-21swapper/210:30:042
134491400,4ptp4l0-21swapper/209:57:552
134491400,4ptp4l0-21swapper/208:05:552
134491400,4ptp4l0-21swapper/207:13:182
134491400,4ptp4l0-21swapper/111:40:151
134491400,4ptp4l0-21swapper/111:30:191
134491400,4ptp4l0-21swapper/109:40:151
134491400,4ptp4l0-21swapper/108:30:161
134491400,4ptp4l0-21swapper/012:36:490
134491400,4ptp4l0-21swapper/012:10:240
134491400,4ptp4l0-21swapper/012:10:240
134491400,4ptp4l0-21swapper/012:05:530
134491400,4ptp4l0-21swapper/011:53:060
134491400,4ptp4l0-21swapper/010:55:170
134491400,4ptp4l0-21swapper/010:45:140
134491400,4ptp4l0-21swapper/010:05:480
134491400,4ptp4l0-21swapper/009:40:390
134491400,4ptp4l0-21swapper/008:55:190
134491400,4ptp4l0-21swapper/008:42:520
134491400,3ptp4l25275-21apt-get07:20:120
134491400,3ptp4l19821-21ls09:25:192
134491400,3ptp4l19287-21apt-get10:35:132
134491400,3ptp4l14905-21df10:25:161
134491400,3ptp4l14005-21diskstats08:05:161
134491400,3ptp4l1056-21apt-get12:15:122
134491400,3ptp4l0-21swapper/210:01:442
134491400,1ptp4l0-21swapper/309:41:263
20628993934,3cyclictest41-21ksoftirqd/309:35:003
20628993934,3cyclictest41-21ksoftirqd/309:15:143
20628993922,8cyclictest41-21ksoftirqd/308:45:353
134491390,5ptp4l0-21swapper/010:30:120
134491390,4ptp4l0-21swapper/310:27:453
134491390,4ptp4l0-21swapper/309:10:073
134491390,4ptp4l0-21swapper/212:35:252
134491390,4ptp4l0-21swapper/212:31:152
134491390,4ptp4l0-21swapper/212:11:552
134491390,4ptp4l0-21swapper/212:11:552
134491390,4ptp4l0-21swapper/211:30:122
134491390,4ptp4l0-21swapper/211:20:162
134491390,4ptp4l0-21swapper/211:05:512
134491390,4ptp4l0-21swapper/210:17:162
134491390,4ptp4l0-21swapper/208:14:002
134491390,4ptp4l0-21swapper/208:02:232
134491390,4ptp4l0-21swapper/207:25:112
134491390,4ptp4l0-21swapper/207:20:212
134491390,4ptp4l0-21swapper/207:16:502
134491390,4ptp4l0-21swapper/112:35:181
134491390,4ptp4l0-21swapper/111:54:531
134491390,4ptp4l0-21swapper/111:20:331
134491390,4ptp4l0-21swapper/111:11:121
134491390,4ptp4l0-21swapper/111:02:151
134491390,4ptp4l0-21swapper/109:45:201
134491390,4ptp4l0-21swapper/108:35:161
134491390,4ptp4l0-21swapper/012:15:260
134491390,4ptp4l0-21swapper/009:55:180
134491390,4ptp4l0-21swapper/008:38:450
134491390,4ptp4l0-21swapper/008:05:230
134491390,4ptp4l0-21swapper/007:37:010
134491390,3ptp4l32638-21diskstats08:45:151
134491390,3ptp4l2561-21hddtemp_smartct07:40:150
134491390,3ptp4l2561-21hddtemp_smartct07:40:140
134491390,3ptp4l24079-21meminfo08:25:211
134491390,3ptp4l11199-21meminfo11:25:210
134491390,3ptp4l0-21swapper/208:34:392
134491390,3ptp4l0-21swapper/110:21:331
134491390,3ptp4l0-21swapper/107:25:521
134491390,3ptp4l0-21swapper/008:25:330
20626993833,3cyclictest25-21ksoftirqd/112:25:011
134491380,5ptp4l0-21swapper/109:05:151
134491380,5ptp4l0-21swapper/108:40:151
134491380,4ptp4l1859-21awk09:55:261
134491380,4ptp4l0-21swapper/311:40:293
134491380,4ptp4l0-21swapper/311:38:113
134491380,4ptp4l0-21swapper/311:34:273
134491380,4ptp4l0-21swapper/310:51:593
134491380,4ptp4l0-21swapper/309:50:143
134491380,4ptp4l0-21swapper/309:46:093
134491380,4ptp4l0-21swapper/307:31:253
134491380,4ptp4l0-21swapper/307:11:593
134491380,4ptp4l0-21swapper/210:45:152
134491380,4ptp4l0-21swapper/209:52:052
134491380,4ptp4l0-21swapper/209:06:472
134491380,4ptp4l0-21swapper/209:00:472
134491380,4ptp4l0-21swapper/111:58:511
134491380,4ptp4l0-21swapper/111:25:231
134491380,4ptp4l0-21swapper/110:50:141
134491380,4ptp4l0-21swapper/108:04:161
134491380,4ptp4l0-21swapper/107:46:101
134491380,4ptp4l0-21swapper/107:15:171
134491380,4ptp4l0-21swapper/012:01:480
134491380,4ptp4l0-21swapper/009:02:520
134491380,3ptp4l25624-21ls11:55:290
134491380,3ptp4l0-21swapper/209:24:002
134491380,3ptp4l0-21swapper/207:35:052
134491380,3ptp4l0-21swapper/009:18:320
134491380,2ptp4l16299-21diskstats08:10:130
134491370,4ptp4l0-21swapper/310:55:063
134491370,4ptp4l0-21swapper/310:42:163
134491370,4ptp4l0-21swapper/310:37:543
134491370,4ptp4l0-21swapper/310:24:083
134491370,4ptp4l0-21swapper/308:58:563
134491370,4ptp4l0-21swapper/210:41:332
134491370,4ptp4l0-21swapper/108:21:361
134491370,4ptp4l0-21swapper/107:56:181
134491370,3ptp4l0-21swapper/311:16:103
134491370,3ptp4l0-21swapper/109:16:371
2062899362,7cyclictest41-21ksoftirqd/311:00:213
134491360,4ptp4l0-21swapper/108:15:241
46198300,24rtkit-daemon1456-21mactelnetd07:05:053
182792235,10sleep20-21swapper/207:05:122
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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