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2025-12-18 - 21:19
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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 Thu Dec 18, 2025 12:45:40)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3136021660,7sleep02843899cyclictest07:15:130
2584421440,6sleep32844199cyclictest11:40:253
134491800,9ptp4l26673-21iostat_ios07:05:141
134491630,2ptp4l0-21swapper/107:15:261
134491600,20ptp4l29310-21irqstats07:10:131
5272590,3sleep0532-21timerandwakeup10:45:260
134491590,4ptp4l0-21swapper/112:25:211
134491590,3ptp4l0-21swapper/209:50:082
300452580,3sleep30-21swapper/310:40:203
134491580,4ptp4l23519-21ps10:25:250
134491580,4ptp4l0-21swapper/111:15:201
134491580,3ptp4l0-21swapper/210:10:182
134491580,16ptp4l26012-21apt-config07:05:000
134491570,4ptp4l0-21swapper/011:32:040
134491570,3ptp4l0-21swapper/110:56:561
134491560,3ptp4l0-21swapper/207:40:172
28438995523,4cyclictest9-21ksoftirqd/012:15:160
28438995523,4cyclictest9-21ksoftirqd/012:15:160
134491550,4ptp4l0-21swapper/108:06:321
134491540,3ptp4l9181-21ntp_offset08:45:211
28438995322,4cyclictest9-21ksoftirqd/012:05:120
134491530,6ptp4l33-21ksoftirqd/207:45:132
134491530,4ptp4l0-21swapper/307:20:203
134491530,4ptp4l0-21swapper/211:54:372
134491530,3ptp4l0-21swapper/112:15:161
134491530,3ptp4l0-21swapper/112:15:151
134491530,3ptp4l0-21swapper/108:55:411
134491520,4ptp4l0-21swapper/208:50:312
134491520,4ptp4l0-21swapper/009:31:010
134491520,4ptp4l0-21swapper/008:30:170
134491520,3ptp4l0-21swapper/109:26:051
134491520,3ptp4l0-21swapper/108:02:471
134491520,17ptp4l0-21swapper/310:56:593
134491510,4ptp4l0-21swapper/212:37:162
134491510,4ptp4l0-21swapper/212:34:122
134491510,4ptp4l0-21swapper/211:21:482
134491510,4ptp4l0-21swapper/210:46:122
134491510,4ptp4l0-21swapper/209:28:372
134491510,4ptp4l0-21swapper/209:18:152
134491510,4ptp4l0-21swapper/208:41:012
134491510,4ptp4l0-21swapper/208:13:132
134491510,4ptp4l0-21swapper/107:27:441
134491510,4ptp4l0-21swapper/010:56:340
134491510,3ptp4l0-21swapper/108:30:251
134491510,3ptp4l0-21swapper/007:45:270
28438995013,3cyclictest9-21ksoftirqd/008:55:220
134491490,4ptp4l0-21swapper/210:04:362
134491490,4ptp4l0-21swapper/209:57:112
134491490,4ptp4l0-21swapper/209:48:392
134491490,4ptp4l0-21swapper/209:36:012
134491490,4ptp4l0-21swapper/209:31:522
134491490,4ptp4l0-21swapper/208:55:372
134491490,4ptp4l0-21swapper/111:52:041
134491490,4ptp4l0-21swapper/111:49:361
134491490,4ptp4l0-21swapper/111:27:031
134491490,4ptp4l0-21swapper/110:46:221
134491490,4ptp4l0-21swapper/007:50:190
134491490,3ptp4l0-21swapper/208:26:132
134491490,3ptp4l0-21swapper/007:30:150
28438994819,3cyclictest9-21ksoftirqd/011:35:220
134491480,4ptp4l0-21swapper/108:35:211
134491480,4ptp4l0-21swapper/012:31:410
134491480,4ptp4l0-21swapper/008:51:400
134491480,4ptp4l0-21swapper/008:47:550
134491480,3ptp4l0-21swapper/211:33:192
134491480,3ptp4l0-21swapper/009:06:190
134491480,2ptp4l0-21swapper/208:20:492
28438994718,4cyclictest9-21ksoftirqd/012:25:270
28438994715,9cyclictest9-21ksoftirqd/011:45:190
134491470,4ptp4l0-21swapper/112:21:471
134491470,4ptp4l0-21swapper/112:09:531
134491470,4ptp4l0-21swapper/111:59:341
134491470,4ptp4l0-21swapper/110:03:431
134491470,4ptp4l0-21swapper/109:53:411
134491470,4ptp4l0-21swapper/010:38:540
134491470,4ptp4l0-21swapper/007:37:100
134491470,4ptp4l0-21swapper/007:37:100
134491470,3ptp4l0-21swapper/108:42:591
134491470,12ptp4l0-21swapper/208:05:172
28438994617,3cyclictest9-21ksoftirqd/008:01:150
28438994616,4cyclictest9-21ksoftirqd/009:24:190
28438994616,3cyclictest9-21ksoftirqd/012:02:340
134491460,4ptp4l0-21swapper/212:04:122
134491460,4ptp4l0-21swapper/207:58:092
134491460,4ptp4l0-21swapper/207:17:022
134491460,4ptp4l0-21swapper/111:44:441
134491460,3ptp4l0-21swapper/209:40:532
134491460,3ptp4l0-21swapper/209:40:532
134491460,3ptp4l0-21swapper/112:36:341
134491460,3ptp4l0-21swapper/111:04:101
134491460,3ptp4l0-21swapper/009:16:030
134491460,12ptp4l0-21swapper/211:10:172
134491460,11ptp4l21326-21timerwakeupswit09:10:281
28441994539,3cyclictest41-21ksoftirqd/309:59:593
28438994520,7cyclictest9-21ksoftirqd/009:14:160
28438994517,6cyclictest9-21ksoftirqd/008:36:330
28438994516,3cyclictest9-21ksoftirqd/012:25:000
28438994515,5cyclictest9-21ksoftirqd/012:14:480
28438994514,4cyclictest9-21ksoftirqd/012:35:260
28438994513,5cyclictest9-21ksoftirqd/009:56:050
28438994512,4cyclictest9-21ksoftirqd/010:21:360
134491450,5ptp4l0-21swapper/207:30:122
134491450,4ptp4l0-21swapper/212:18:542
134491450,4ptp4l0-21swapper/212:18:542
134491450,4ptp4l0-21swapper/210:06:032
134491450,3ptp4l0-21swapper/207:54:002
134491450,10ptp4l0-21swapper/210:16:282
134491450,10ptp4l0-21swapper/110:20:061
2843899449,5cyclictest9-21ksoftirqd/011:53:400
28438994418,7cyclictest9-21ksoftirqd/008:09:200
28438994410,4cyclictest9-21ksoftirqd/009:50:250
134491440,9ptp4l0-21swapper/211:36:032
134491440,3ptp4l0-21swapper/109:18:421
134491440,3ptp4l0-21swapper/107:31:431
134491440,3ptp4l0-21swapper/010:01:110
134491440,2ptp4l0-21swapper/110:36:161
134491440,10ptp4l0-21swapper/210:52:022
28438994318,6cyclictest9-21ksoftirqd/011:09:250
28438994315,3cyclictest9-21ksoftirqd/008:24:090
28438994315,3cyclictest9-21ksoftirqd/007:43:460
2843899431,2cyclictest121rcu_preempt11:26:140
134491430,5ptp4l0-21swapper/307:55:213
134491430,3ptp4l0-21swapper/111:32:531
134491430,3ptp4l0-21swapper/107:44:041
134491430,2ptp4l0-21swapper/107:21:011
134491430,10ptp4l0-21swapper/210:25:282
134491430,10ptp4l0-21swapper/107:39:051
134491430,10ptp4l0-21swapper/107:39:051
2843899426,7cyclictest9-21ksoftirqd/010:05:220
28438994217,7cyclictest9-21ksoftirqd/009:44:160
28438994217,7cyclictest9-21ksoftirqd/009:44:160
28438994212,4cyclictest9-21ksoftirqd/007:55:130
134491420,9ptp4l0-21swapper/212:29:112
134491420,9ptp4l0-21swapper/207:37:252
134491420,9ptp4l0-21swapper/207:37:252
134491420,5ptp4l29033-21iostat07:10:130
134491420,5ptp4l0-21swapper/207:06:582
134491420,4ptp4l9984-21apt-get07:40:003
134491420,4ptp4l8072-21apt-get08:45:113
134491420,4ptp4l27129-21hddtemp_smartct09:25:150
134491420,4ptp4l11651-21memory11:10:221
134491420,4ptp4l0-21swapper/010:30:160
134491420,4ptp4l0-21swapper/007:28:140
134491420,3ptp4l16982-21users11:20:291
134491420,23ptp4l25-21ksoftirqd/110:53:301
28438994136,3cyclictest9-21ksoftirqd/011:15:000
28438994130,7cyclictest9-21ksoftirqd/009:39:590
134491410,5ptp4l0-21swapper/212:20:282
134491410,5ptp4l0-21swapper/210:20:262
134491410,5ptp4l0-21swapper/209:22:352
134491410,5ptp4l0-21swapper/110:10:291
134491410,5ptp4l0-21swapper/009:45:210
134491410,4ptp4l9383-21meminfo09:55:201
134491410,4ptp4l18729-21ntp_states11:25:242
134491410,4ptp4l18560-21memory11:25:233
134491410,4ptp4l12735-21apt-get07:45:133
134491410,4ptp4l0-21swapper/310:30:143
134491410,4ptp4l0-21swapper/307:15:123
134491410,4ptp4l0-21swapper/211:02:582
134491410,4ptp4l0-21swapper/209:00:212
134491410,4ptp4l0-21swapper/107:57:111
134491410,4ptp4l0-21swapper/011:03:120
134491410,3ptp4l30200-21ls10:40:220
134491410,3ptp4l2843999cyclictest10:27:501
134491410,3ptp4l27551-21ls08:15:190
134491410,3ptp4l24407-21apt-get09:20:121
134491410,3ptp4l0-21swapper/110:15:181
28441994035,3cyclictest41-21ksoftirqd/309:50:003
28441994035,3cyclictest41-21ksoftirqd/307:39:583
28441994035,3cyclictest41-21ksoftirqd/307:39:583
28441994034,3cyclictest41-21ksoftirqd/308:29:593
28438994035,3cyclictest9-21ksoftirqd/012:00:010
134491400,5ptp4l15816-21fschecks_count12:30:143
134491400,5ptp4l0-21swapper/312:20:143
134491400,5ptp4l0-21swapper/209:12:052
134491400,4ptp4l33-21ksoftirqd/208:35:232
134491400,4ptp4l32164-21meminfo08:25:231
134491400,4ptp4l29165-21diskstats08:20:121
134491400,4ptp4l24548-21diskstats08:10:151
134491400,4ptp4l18840-21python09:05:241
134491400,4ptp4l13850-21ntp_states07:45:241
134491400,4ptp4l0-21swapper/309:35:123
134491400,4ptp4l0-21swapper/309:30:233
134491400,4ptp4l0-21swapper/309:15:163
134491400,4ptp4l0-21swapper/308:35:173
134491400,4ptp4l0-21swapper/212:08:122
134491400,4ptp4l0-21swapper/211:41:162
134491400,4ptp4l0-21swapper/210:56:002
134491400,4ptp4l0-21swapper/210:38:502
134491400,4ptp4l0-21swapper/208:15:522
134491400,4ptp4l0-21swapper/208:00:002
134491400,4ptp4l0-21swapper/207:29:512
134491400,4ptp4l0-21swapper/207:12:562
134491400,4ptp4l0-21swapper/108:15:221
134491400,4ptp4l0-21swapper/010:50:120
134491400,4ptp4l0-21swapper/008:40:210
134491400,4ptp4l0-21swapper/008:10:190
134491400,4ptp4l0-21swapper/007:20:530
134491400,3ptp4l8122chrt09:38:001
134491400,3ptp4l4201-21iostat_ios09:45:171
134491400,3ptp4l14496-21ls11:15:282
134491400,3ptp4l1400-21df_inode08:30:122
134491400,3ptp4l0-21swapper/308:41:293
28441993934,3cyclictest41-21ksoftirqd/309:09:583
2843899394,3cyclictest121rcu_preempt11:21:310
28438993913,7cyclictest9-21ksoftirqd/010:19:360
134491390,5ptp4l0-21swapper/308:15:173
134491390,5ptp4l0-21swapper/108:50:141
134491390,4ptp4l2843999cyclictest10:30:241
134491390,4ptp4l25855-21ntp_states11:40:260
134491390,4ptp4l16365-21phc2sys09:00:221
134491390,4ptp4l14115-21ntp_states11:15:240
134491390,4ptp4l12003-21processes10:00:243
134491390,4ptp4l0-21swapper/310:45:183
134491390,4ptp4l0-21swapper/310:25:303
134491390,4ptp4l0-21swapper/310:22:083
134491390,4ptp4l0-21swapper/310:18:503
134491390,4ptp4l0-21swapper/310:05:183
134491390,4ptp4l0-21swapper/309:14:593
134491390,4ptp4l0-21swapper/308:55:153
134491390,4ptp4l0-21swapper/308:12:473
134491390,4ptp4l0-21swapper/308:05:193
134491390,4ptp4l0-21swapper/307:30:163
134491390,4ptp4l0-21swapper/307:27:363
134491390,4ptp4l0-21swapper/212:14:302
134491390,4ptp4l0-21swapper/211:55:072
134491390,4ptp4l0-21swapper/211:46:532
134491390,4ptp4l0-21swapper/210:43:122
134491390,4ptp4l0-21swapper/209:09:242
134491390,4ptp4l0-21swapper/208:46:442
134491390,4ptp4l0-21swapper/207:20:452
134491390,4ptp4l0-21swapper/112:10:251
134491390,4ptp4l0-21swapper/111:38:531
134491390,4ptp4l0-21swapper/109:40:251
134491390,4ptp4l0-21swapper/109:40:251
134491390,4ptp4l0-21swapper/010:11:060
134491390,4ptp4l0-21swapper/009:05:000
134491390,4ptp4l0-21swapper/008:27:330
134491390,3ptp4l8707-21df_inode11:05:161
134491390,3ptp4l16582-21ntp_states12:30:221
134491390,3ptp4l0-21swapper/311:06:583
134491390,3ptp4l0-21swapper/309:25:293
134491380,5ptp4l2632-21missed_timers12:00:223
134491380,4ptp4l29277-21grep08:20:133
134491380,4ptp4l0-21swapper/312:25:343
134491380,4ptp4l0-21swapper/312:18:523
134491380,4ptp4l0-21swapper/312:18:523
134491380,4ptp4l0-21swapper/311:15:163
134491380,4ptp4l0-21swapper/311:10:443
134491380,4ptp4l0-21swapper/311:00:343
134491380,4ptp4l0-21swapper/310:50:063
134491380,4ptp4l0-21swapper/310:12:593
134491380,4ptp4l0-21swapper/308:30:123
134491380,4ptp4l0-21swapper/307:12:563
134491380,4ptp4l0-21swapper/211:06:222
134491380,4ptp4l0-21swapper/210:33:262
134491380,4ptp4l0-21swapper/112:02:261
134491380,4ptp4l0-21swapper/110:08:011
134491380,4ptp4l0-21swapper/107:50:211
134491380,3ptp4l0-21swapper/307:52:313
46198370,4rtkit-daemon0-21swapper/310:38:143
28441993732,3cyclictest41-21ksoftirqd/311:50:203
134491370,5ptp4l0-21swapper/307:07:123
134491370,4ptp4l0-21swapper/312:38:353
134491370,4ptp4l0-21swapper/311:36:173
134491370,4ptp4l0-21swapper/309:50:473
134491370,4ptp4l0-21swapper/309:23:283
134491370,4ptp4l0-21swapper/308:53:473
134491370,3ptp4l0-21swapper/312:05:163
134491370,3ptp4l0-21swapper/309:00:213
134491370,3ptp4l0-21swapper/308:03:103
134491370,3ptp4l0-21swapper/110:43:061
134491370,3ptp4l0-21swapper/109:33:111
134491360,4ptp4l0-21swapper/311:31:333
134491360,3ptp4l31670-21/usr/sbin/munin11:55:213
134491360,3ptp4l0-21swapper/312:10:093
134491360,3ptp4l0-21swapper/309:43:273
134491360,3ptp4l0-21swapper/309:43:273
134491350,3ptp4l0-21swapper/311:25:013
28441992520,3cyclictest41-21ksoftirqd/311:50:003
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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