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2026-05-08 - 16:40
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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 Fri May 08, 2026 12:45:35)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
26632880,4sleep00-21swapper/011:20:170
1532099738,62cyclictest0-21swapper/212:15:302
1532099738,62cyclictest0-21swapper/212:15:292
15320996233,9cyclictest33-21ksoftirqd/208:10:232
15320996123,5cyclictest33-21ksoftirqd/209:00:132
134491610,4ptp4l0-21swapper/110:50:151
134491610,17ptp4l0-21swapper/112:15:141
134491610,17ptp4l0-21swapper/112:15:141
212212600,6sleep21532099cyclictest08:30:172
15320996028,5cyclictest33-21ksoftirqd/210:57:372
15320996023,9cyclictest33-21ksoftirqd/207:10:142
146812600,5sleep30-21swapper/309:25:183
146812600,5sleep30-21swapper/309:25:183
134491600,4ptp4l19508-21ntp_states09:35:221
134491600,4ptp4l0-21swapper/010:25:180
134491590,5ptp4l0-21swapper/309:32:443
134491590,4ptp4l0-21swapper/012:11:460
134491590,3ptp4l0-21swapper/112:10:101
134491580,4ptp4l31434-21latency_hist07:44:590
1532099576,8cyclictest33-21ksoftirqd/210:45:142
134491570,5ptp4l0-21swapper/012:18:150
134491570,5ptp4l0-21swapper/012:18:140
134491570,4ptp4l0-21swapper/210:01:232
134491570,4ptp4l0-21swapper/107:05:041
134491570,3ptp4l0-21swapper/210:35:332
134491570,3ptp4l0-21swapper/207:18:022
134491570,3ptp4l0-21swapper/112:25:021
134491570,3ptp4l0-21swapper/108:00:171
134491570,3ptp4l0-21swapper/012:00:150
134491560,4ptp4l0-21swapper/209:48:182
134491560,3ptp4l0-21swapper/310:10:273
134491560,3ptp4l0-21swapper/011:47:420
1532099554,8cyclictest121rcu_preempt12:35:252
15320995523,5cyclictest33-21ksoftirqd/209:10:152
1532099550,13cyclictest33-21ksoftirqd/207:35:192
134491550,3ptp4l0-21swapper/011:11:080
134491550,3ptp4l0-21swapper/009:15:390
134491550,3ptp4l0-21swapper/008:45:130
1532099546,9cyclictest33-21ksoftirqd/208:50:182
1532099545,8cyclictest33-21ksoftirqd/209:35:132
1532099543,6cyclictest33-21ksoftirqd/210:25:002
1532099542,6cyclictest33-21ksoftirqd/209:55:232
1532099542,33cyclictest0-21swapper/211:52:172
1532099542,33cyclictest0-21swapper/209:16:272
1532099542,30cyclictest0-21swapper/212:04:082
1532099542,30cyclictest0-21swapper/208:55:282
1532099534,7cyclictest33-21ksoftirqd/209:30:262
1532099533,6cyclictest33-21ksoftirqd/210:10:252
15320995325,5cyclictest33-21ksoftirqd/212:20:012
134491530,4ptp4l0-21swapper/107:26:211
1532099525,10cyclictest33-21ksoftirqd/212:30:212
1532099524,8cyclictest33-21ksoftirqd/210:40:182
1532099522,6cyclictest33-21ksoftirqd/210:30:172
1532099522,30cyclictest0-21swapper/208:37:062
1532099520,6cyclictest33-21ksoftirqd/207:20:152
1532099520,5cyclictest0-21swapper/208:05:132
134491520,4ptp4l0-21swapper/110:59:181
134491520,4ptp4l0-21swapper/108:31:361
134491520,3ptp4l0-21swapper/010:55:180
1532099515,8cyclictest33-21ksoftirqd/211:30:252
1532099514,9cyclictest121rcu_preempt07:30:232
1532099514,10cyclictest33-21ksoftirqd/211:00:172
1532099513,7cyclictest0-21swapper/207:50:212
1532099513,5cyclictest33-21ksoftirqd/211:35:142
1532099512,7cyclictest33-21ksoftirqd/211:20:132
1532099512,6cyclictest33-21ksoftirqd/208:00:012
1532099512,30cyclictest0-21swapper/212:07:052
1532099511,8cyclictest0-21swapper/209:40:222
1532099510,7cyclictest0-21swapper/209:50:222
1532099510,6cyclictest33-21ksoftirqd/208:00:172
1532099510,6cyclictest0-21swapper/207:46:452
134491510,4ptp4l13390-21/usr/sbin/munin08:15:192
134491510,4ptp4l0-21swapper/308:30:143
134491510,4ptp4l0-21swapper/308:08:223
134491510,4ptp4l0-21swapper/109:30:171
134491510,4ptp4l0-21swapper/109:17:041
134491510,4ptp4l0-21swapper/108:41:211
134491510,4ptp4l0-21swapper/011:09:420
134491510,3ptp4l2003-21df07:50:111
134491510,3ptp4l0-21swapper/309:43:143
134491510,3ptp4l0-21swapper/011:51:150
134491510,13ptp4l0-21swapper/009:05:090
134491510,10ptp4l0-21swapper/008:21:500
1532099504,7cyclictest33-21ksoftirqd/209:05:182
1532099504,5cyclictest33-21ksoftirqd/211:40:142
1532099504,5cyclictest33-21ksoftirqd/208:25:132
1532099504,5cyclictest33-21ksoftirqd/207:25:192
1532099503,7cyclictest0-21swapper/209:22:292
1532099502,7cyclictest0-21swapper/211:10:222
1532099502,6cyclictest33-21ksoftirqd/212:25:232
1532099502,6cyclictest0-21swapper/212:10:232
1532099502,45cyclictest0-21swapper/208:45:182
134491500,4ptp4l0-21swapper/309:57:053
134491500,4ptp4l0-21swapper/111:43:441
134491500,3ptp4l0-21swapper/308:50:243
134491500,3ptp4l0-21swapper/012:25:320
134491500,3ptp4l0-21swapper/008:52:590
1532099495,8cyclictest33-21ksoftirqd/211:55:152
1532099495,7cyclictest33-21ksoftirqd/207:40:252
1532099493,5cyclictest33-21ksoftirqd/211:30:002
1532099493,5cyclictest33-21ksoftirqd/209:30:012
1532099493,5cyclictest33-21ksoftirqd/209:30:012
1532099492,6cyclictest33-21ksoftirqd/210:05:242
134491490,5ptp4l0-21swapper/309:48:213
134491490,4ptp4l0-21swapper/307:32:583
134491490,4ptp4l0-21swapper/112:32:251
134491490,4ptp4l0-21swapper/110:29:371
134491490,4ptp4l0-21swapper/110:09:111
134491490,4ptp4l0-21swapper/109:29:261
134491490,4ptp4l0-21swapper/109:29:261
134491490,4ptp4l0-21swapper/012:33:440
134491490,4ptp4l0-21swapper/011:59:050
134491490,4ptp4l0-21swapper/008:03:120
134491490,4ptp4l0-21swapper/007:15:290
1532099482,4cyclictest15840-21apt-key08:20:012
1532099480,6cyclictest33-21ksoftirqd/210:28:512
134491480,4ptp4l0-21swapper/308:19:093
134491480,4ptp4l0-21swapper/112:23:301
134491480,4ptp4l0-21swapper/111:24:341
134491480,4ptp4l0-21swapper/110:37:111
134491480,4ptp4l0-21swapper/109:59:431
134491480,4ptp4l0-21swapper/011:34:460
134491480,4ptp4l0-21swapper/011:28:410
134491480,3ptp4l0-21swapper/112:06:441
134491480,3ptp4l0-21swapper/012:36:080
1532099474,5cyclictest33-21ksoftirqd/208:44:592
1532099473,5cyclictest33-21ksoftirqd/211:45:192
134491470,5ptp4l0-21swapper/012:20:240
134491470,4ptp4l0-21swapper/310:44:593
134491470,4ptp4l0-21swapper/310:33:253
134491470,4ptp4l0-21swapper/310:01:283
134491470,4ptp4l0-21swapper/111:51:141
134491470,4ptp4l0-21swapper/110:22:071
134491470,4ptp4l0-21swapper/110:15:291
134491470,4ptp4l0-21swapper/108:15:011
134491470,4ptp4l0-21swapper/011:37:130
134491470,4ptp4l0-21swapper/010:35:580
134491470,4ptp4l0-21swapper/009:25:010
134491470,4ptp4l0-21swapper/009:25:010
134491470,3ptp4l0-21swapper/110:47:291
1532099462,5cyclictest33-21ksoftirqd/211:05:142
134491460,8ptp4l0-21swapper/107:10:161
134491460,4ptp4l0-21swapper/010:43:420
134491460,3ptp4l0-21swapper/308:35:383
1532099454,9cyclictest33-21ksoftirqd/210:20:002
15319994540,3cyclictest25-21ksoftirqd/108:40:011
134491450,5ptp4l0-21swapper/107:45:211
134491450,4ptp4l12981-21apt-get07:05:110
134491450,4ptp4l0-21swapper/109:01:001
134491450,4ptp4l0-21swapper/009:30:510
134491450,3ptp4l121rcu_preempt07:57:260
134491450,3ptp4l0-21swapper/310:15:063
134491450,3ptp4l0-21swapper/111:25:061
134491450,3ptp4l0-21swapper/108:28:471
1532099442,6cyclictest0-21swapper/211:15:172
134491440,9ptp4l0-21swapper/011:19:000
134491440,9ptp4l0-21swapper/008:44:320
134491440,5ptp4l10463-21ls11:35:183
134491440,4ptp4l5288-21apt-get12:35:121
134491440,4ptp4l14827-21ls08:15:270
134491440,4ptp4l0-21swapper/111:31:111
134491440,4ptp4l0-21swapper/007:38:100
134491440,3ptp4l0-21swapper/109:47:111
134491440,3ptp4l0-21swapper/007:47:070
1532099430,6cyclictest1-21systemd10:53:142
134491430,9ptp4l0-21swapper/009:59:380
134491430,5ptp4l0-21swapper/111:05:201
134491430,4ptp4l25242-21apt-get11:00:130
134491430,4ptp4l24765-21apt-get07:30:121
134491430,4ptp4l0-21swapper/108:46:231
15318994237,3cyclictest9-21ksoftirqd/008:30:010
134691420,10getstats0-21swapper/009:50:390
134491420,5ptp4l0-21swapper/307:10:103
134491420,4ptp4l3570-21ls09:00:283
134491420,4ptp4l23560-21apt-get12:05:110
134491420,4ptp4l2318-21gnome-shell09:13:580
134491420,4ptp4l12613-21ntp_states09:20:233
134491420,4ptp4l0-21swapper/008:55:180
15318994136,3cyclictest9-21ksoftirqd/011:45:000
134491410,5ptp4l21304-21python07:20:251
134491410,5ptp4l0-21swapper/108:50:221
134491410,5ptp4l0-21swapper/009:41:370
134491410,4ptp4l9385-21perl09:15:163
134491410,4ptp4l2683-21iostat_ios11:20:193
134491410,4ptp4l24568-21ls09:45:260
134491410,4ptp4l22831-21iostat_ios07:25:180
134491410,4ptp4l17849-21df07:15:131
134491410,4ptp4l15473-21apt-get08:20:021
134491410,4ptp4l14351-21apt-get11:45:131
134491410,4ptp4l11409-21df_inode08:10:141
134491410,4ptp4l0-21swapper/010:15:180
134491410,3ptp4l8809-21apt-get08:05:121
134491410,3ptp4l4623-21hddtemp_smartct07:55:151
134491410,3ptp4l0-21swapper/311:17:143
134491410,3ptp4l0-21swapper/309:09:243
15321994029,9cyclictest41-21ksoftirqd/310:25:243
15318994035,3cyclictest9-21ksoftirqd/010:10:180
134491400,5ptp4l0-21swapper/010:50:190
134491400,5ptp4l0-21swapper/010:45:220
134491400,5ptp4l0-21swapper/007:30:110
134491400,4ptp4l9831-21diskstats11:35:141
134491400,4ptp4l4675-21diskstats09:05:141
134491400,4ptp4l32438-21diskstats11:15:141
134491400,4ptp4l11988-21iostat10:30:180
134491400,4ptp4l0-21swapper/312:01:383
134491400,4ptp4l0-21swapper/311:00:213
134491400,4ptp4l0-21swapper/308:45:253
134491400,4ptp4l0-21swapper/308:20:283
134491400,4ptp4l0-21swapper/112:00:141
134491400,4ptp4l0-21swapper/111:55:231
134491400,4ptp4l0-21swapper/111:00:141
134491400,4ptp4l0-21swapper/110:30:141
134491400,4ptp4l0-21swapper/110:14:511
134491400,4ptp4l0-21swapper/107:40:161
134491400,4ptp4l0-21swapper/107:36:491
134491400,4ptp4l0-21swapper/010:20:130
134491400,4ptp4l0-21swapper/008:10:350
134491400,3ptp4l549-21memory08:55:211
134491400,3ptp4l30750-21irqstats10:00:180
134491400,3ptp4l3015-21meminfo09:00:180
134491400,3ptp4l27540-21apt-get11:05:113
134491400,3ptp4l25449-21df_inode08:40:153
134491400,3ptp4l20696-21apt-get09:40:101
134491400,3ptp4l1788-21apt-get07:50:110
134491390,4ptp4l0-21swapper/312:20:353
134491390,4ptp4l0-21swapper/311:25:013
134491390,4ptp4l0-21swapper/310:45:203
134491390,4ptp4l0-21swapper/310:05:583
134491390,4ptp4l0-21swapper/309:53:213
134491390,4ptp4l0-21swapper/309:35:123
134491390,4ptp4l0-21swapper/308:55:273
134491390,4ptp4l0-21swapper/308:25:203
134491390,4ptp4l0-21swapper/307:35:273
134491390,4ptp4l0-21swapper/307:19:313
134491390,4ptp4l0-21swapper/110:44:201
134491390,4ptp4l0-21swapper/110:04:051
134491390,4ptp4l0-21swapper/109:23:471
134491390,4ptp4l0-21swapper/109:13:441
134491390,4ptp4l0-21swapper/010:05:440
134491390,4ptp4l0-21swapper/009:20:340
134491390,4ptp4l0-21swapper/008:30:230
134491390,3ptp4l19809-21ls09:35:260
134491390,3ptp4l0-21swapper/008:05:260
1531899387,4cyclictest9-21ksoftirqd/007:10:110
134491380,4ptp4l15677-21systemctl11:45:263
134491380,4ptp4l0-21swapper/312:32:473
134491380,4ptp4l0-21swapper/312:15:323
134491380,4ptp4l0-21swapper/312:15:323
134491380,4ptp4l0-21swapper/312:14:553
134491380,4ptp4l0-21swapper/311:40:213
134491380,4ptp4l0-21swapper/310:35:143
134491380,4ptp4l0-21swapper/310:22:513
134491380,4ptp4l0-21swapper/307:52:153
134491380,4ptp4l0-21swapper/307:40:203
134491380,4ptp4l0-21swapper/307:23:013
134491380,4ptp4l0-21swapper/111:10:241
134491380,4ptp4l0-21swapper/008:35:020
134491380,4ptp4l0-21swapper/007:20:090
134491380,3ptp4l0-21swapper/109:50:141
134491380,2ptp4l30854-21ls11:10:203
134491370,4ptp4l0-21swapper/312:27:533
134491370,4ptp4l0-21swapper/311:58:003
134491370,4ptp4l0-21swapper/311:30:423
134491370,4ptp4l0-21swapper/308:12:123
134491370,4ptp4l0-21swapper/308:04:523
134491370,4ptp4l0-21swapper/307:45:133
134491370,3ptp4l0-21swapper/311:50:243
134491370,3ptp4l0-21swapper/309:10:253
134491360,4ptp4l0-21swapper/307:58:453
134491360,3ptp4l0-21swapper/312:37:163
134491360,3ptp4l0-21swapper/310:59:003
134491360,3ptp4l0-21swapper/310:50:503
46198350,11rtkit-daemon0-21swapper/207:06:042
134491350,4ptp4l0-21swapper/307:28:523
134491350,3ptp4l0-21swapper/312:06:353
46198230,3rtkit-daemon0-21swapper/307:07:343
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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