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2026-05-21 - 18:50
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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 May 21, 2026 12:45:43)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
245742760,3sleep30-21swapper/312:10:003
1440499740,3cyclictest14191-21phc2sys10:35:240
14406997034,6cyclictest33-21ksoftirqd/207:20:002
92332670,6sleep30-21swapper/309:15:263
14406996733,7cyclictest33-21ksoftirqd/208:50:002
14406996635,5cyclictest33-21ksoftirqd/211:15:212
14406996634,4cyclictest33-21ksoftirqd/208:35:132
14406996531,4cyclictest33-21ksoftirqd/211:05:152
14406996529,6cyclictest33-21ksoftirqd/208:30:002
14406996432,6cyclictest33-21ksoftirqd/211:30:002
14406996429,6cyclictest33-21ksoftirqd/209:05:002
14406996427,11cyclictest33-21ksoftirqd/211:45:002
14406996427,11cyclictest33-21ksoftirqd/211:45:002
14406996426,4cyclictest33-21ksoftirqd/207:55:272
1440499640,2cyclictest197542sleep011:57:540
1440699638,7cyclictest33-21ksoftirqd/209:20:002
14406996332,7cyclictest33-21ksoftirqd/210:45:122
14406996328,4cyclictest33-21ksoftirqd/207:45:002
14407996255,6cyclictest0-21swapper/309:35:003
14406996233,7cyclictest33-21ksoftirqd/212:00:002
14406996233,4cyclictest33-21ksoftirqd/209:40:252
14406996228,4cyclictest33-21ksoftirqd/211:30:122
14406996130,5cyclictest33-21ksoftirqd/212:30:282
14406996130,4cyclictest33-21ksoftirqd/210:05:152
14406996130,4cyclictest33-21ksoftirqd/208:40:272
14406996128,6cyclictest33-21ksoftirqd/212:20:202
14406996128,4cyclictest33-21ksoftirqd/211:00:242
14406996122,4cyclictest33-21ksoftirqd/210:10:152
134491610,4ptp4l0-21swapper/207:33:062
134491610,4ptp4l0-21swapper/011:15:560
14406996031,9cyclictest33-21ksoftirqd/209:35:212
14406996031,3cyclictest33-21ksoftirqd/209:25:272
14406996029,5cyclictest33-21ksoftirqd/208:17:002
14406996028,5cyclictest33-21ksoftirqd/211:50:252
1440499600,3cyclictest134491ptp4l08:45:160
1440799596,6cyclictest21618-21sed10:50:293
1440799596,13cyclictest0-21swapper/310:25:143
14407995912,7cyclictest41-21ksoftirqd/308:00:003
1440699597,3cyclictest33-21ksoftirqd/207:20:132
14406995928,6cyclictest33-21ksoftirqd/207:45:252
14406995928,6cyclictest33-21ksoftirqd/207:45:252
14406995927,4cyclictest33-21ksoftirqd/211:35:152
14406995926,5cyclictest33-21ksoftirqd/208:50:132
14406995926,4cyclictest33-21ksoftirqd/210:40:112
14406995926,4cyclictest33-21ksoftirqd/210:40:112
14406995923,6cyclictest33-21ksoftirqd/208:10:252
14406995923,4cyclictest33-21ksoftirqd/210:05:002
14406995921,4cyclictest33-21ksoftirqd/212:05:202
14406995920,4cyclictest33-21ksoftirqd/209:20:252
134491590,3ptp4l0-21swapper/111:00:241
1440799587,7cyclictest673-21sed11:15:273
1440799587,6cyclictest0-21swapper/308:40:223
1440799580,18cyclictest31563-21sed10:05:153
14406995833,7cyclictest33-21ksoftirqd/209:50:172
14406995829,7cyclictest33-21ksoftirqd/210:40:002
14406995828,4cyclictest33-21ksoftirqd/212:25:182
14406995828,4cyclictest33-21ksoftirqd/207:25:272
14406995827,3cyclictest33-21ksoftirqd/209:55:132
14406995826,9cyclictest33-21ksoftirqd/210:20:012
14406995826,6cyclictest33-21ksoftirqd/212:00:142
134491580,4ptp4l0-21swapper/109:35:231
14406995732,7cyclictest33-21ksoftirqd/208:00:262
14406995730,4cyclictest33-21ksoftirqd/207:40:002
14406995725,5cyclictest33-21ksoftirqd/208:05:192
14406995724,7cyclictest33-21ksoftirqd/212:35:132
14406995724,7cyclictest33-21ksoftirqd/211:10:162
14406995724,7cyclictest33-21ksoftirqd/211:10:162
14406995724,6cyclictest33-21ksoftirqd/207:50:282
14406995724,5cyclictest33-21ksoftirqd/212:15:202
14406995724,4cyclictest33-21ksoftirqd/211:45:212
134491570,3ptp4l0-21swapper/010:00:320
134491570,3ptp4l0-21swapper/008:35:300
134491570,2ptp4l31528-21iostat08:55:171
1440799563,7cyclictest41-21ksoftirqd/311:30:253
14407995615,5cyclictest41-21ksoftirqd/312:30:133
14406995625,4cyclictest33-21ksoftirqd/208:55:242
14406995623,3cyclictest33-21ksoftirqd/210:25:142
134491560,5ptp4l0-21swapper/007:09:420
134491560,4ptp4l0-21swapper/308:56:093
134491560,4ptp4l0-21swapper/110:37:431
134491560,3ptp4l0-21swapper/011:25:210
134491560,3ptp4l0-21swapper/010:21:350
134491560,3ptp4l0-21swapper/007:45:130
134491560,3ptp4l0-21swapper/007:45:130
14406995526,4cyclictest33-21ksoftirqd/209:30:182
134491550,4ptp4l0-21swapper/210:30:252
134491550,4ptp4l0-21swapper/112:26:441
134491550,4ptp4l0-21swapper/107:38:341
134491550,4ptp4l0-21swapper/107:11:161
134491550,25ptp4l9-21ksoftirqd/008:19:420
1440799545,7cyclictest19733-21grep09:40:113
1440799545,11cyclictest0-21swapper/311:45:243
1440799541,12cyclictest18493-21sed08:25:273
1440699546,3cyclictest33-21ksoftirqd/209:45:162
14406995438,6cyclictest33-21ksoftirqd/211:00:002
1440699543,3cyclictest33-21ksoftirqd/207:10:262
134491540,4ptp4l0-21swapper/111:27:091
134491540,4ptp4l0-21swapper/109:32:031
134491540,4ptp4l0-21swapper/109:27:031
134491540,4ptp4l0-21swapper/108:47:051
134491540,4ptp4l0-21swapper/107:56:361
134491540,4ptp4l0-21swapper/107:06:061
134491540,4ptp4l0-21swapper/011:37:450
134491540,3ptp4l0-21swapper/112:12:551
134491540,3ptp4l0-21swapper/010:28:160
1440799537,6cyclictest0-21swapper/310:15:233
1440799534,5cyclictest285122sleep309:56:413
1440799532,18cyclictest6485-21taskset09:10:213
1440799531,11cyclictest26816-21taskset12:14:513
1440799530,15cyclictest1301-21snmpd09:07:513
1440699538,2cyclictest33-21ksoftirqd/208:30:262
1440699536,3cyclictest33-21ksoftirqd/210:20:292
14406995322,4cyclictest33-21ksoftirqd/212:10:282
14406995321,7cyclictest33-21ksoftirqd/208:20:122
1440499531,3cyclictest134491ptp4l09:55:170
134691530,9getstats0-21swapper/112:34:451
134491530,4ptp4l0-21swapper/109:52:571
134491530,3ptp4l0-21swapper/111:30:141
1440799527,5cyclictest0-21swapper/308:45:263
1440799526,14cyclictest0-21swapper/310:10:233
1440799525,6cyclictest27237-21df_abs11:05:143
1440799524,6cyclictest8339-21irqrtprio08:05:183
1440799523,6cyclictest41-21ksoftirqd/310:55:263
1440799523,6cyclictest0-21swapper/309:35:153
1440799521,13cyclictest0-21swapper/308:35:113
1440699527,3cyclictest33-21ksoftirqd/209:10:272
14406995221,4cyclictest33-21ksoftirqd/211:24:092
134491520,4ptp4l0-21swapper/110:54:561
134491520,4ptp4l0-21swapper/008:03:430
134491520,3ptp4l0-21swapper/108:29:011
134491520,2ptp4l0-21swapper/112:02:271
1440799511,6cyclictest0-21swapper/312:20:233
14406995118,4cyclictest33-21ksoftirqd/209:05:142
134491510,4ptp4l0-21swapper/108:39:171
134491510,4ptp4l0-21swapper/108:20:521
134491510,16ptp4l25-21ksoftirqd/110:10:111
1440799502,6cyclictest14423-21/usr/sbin/munin07:10:203
1440799502,6cyclictest0-21swapper/307:40:003
1440799502,17cyclictest30926-21taskset10:02:553
1440799501,6cyclictest16136-21timerwakeupswit08:20:263
1440699503,7cyclictest33-21ksoftirqd/210:50:202
134491500,4ptp4l0-21swapper/109:04:251
134491500,4ptp4l0-21swapper/108:34:361
1440799498,12cyclictest0-21swapper/311:35:273
1440799496,7cyclictest0-21swapper/310:45:123
134491490,4ptp4l0-21swapper/007:13:000
1440799489,6cyclictest0-21swapper/311:50:233
1440799483,6cyclictest41-21ksoftirqd/308:50:203
1440799481,15cyclictest26267-21taskset09:52:203
1440799480,17cyclictest29302-21cat07:40:203
134491480,4ptp4l0-21swapper/110:58:481
134491480,3ptp4l0-21swapper/108:19:201
134491480,3ptp4l0-21swapper/008:59:350
1440799472,11cyclictest0-21swapper/311:01:183
1440799471,6cyclictest4427-21if_enp1s012:35:163
1440799470,6cyclictest41-21ksoftirqd/308:00:163
134491470,4ptp4l0-21swapper/109:45:121
134491470,3ptp4l0-21swapper/007:54:210
1440799465,6cyclictest0-21swapper/307:15:253
1440799464,11cyclictest0-21swapper/310:35:203
1440799461,10cyclictest1865-21/usr/sbin/munin07:50:263
1440799460,7cyclictest41-21ksoftirqd/311:57:093
1440799460,5cyclictest1301-21snmpd11:13:143
1440799460,5cyclictest1301-21snmpd11:13:143
1440799460,10cyclictest24153-21grep07:30:163
134491460,4ptp4l0-21swapper/107:28:371
134491460,4ptp4l0-21swapper/107:23:201
134491460,4ptp4l0-21swapper/011:20:410
134491460,3ptp4l0-21swapper/110:28:541
134491460,3ptp4l0-21swapper/109:08:221
134491460,3ptp4l0-21swapper/108:52:021
1440799456,13cyclictest0-21swapper/311:20:173
134491450,3ptp4l0-21swapper/111:44:251
134491450,3ptp4l0-21swapper/111:44:251
134491450,3ptp4l0-21swapper/109:18:411
134491450,3ptp4l0-21swapper/107:44:381
134491450,3ptp4l0-21swapper/012:31:150
134491450,3ptp4l0-21swapper/012:28:440
134491450,3ptp4l0-21swapper/010:42:110
134491450,3ptp4l0-21swapper/010:42:110
134491450,3ptp4l0-21swapper/009:28:150
1440799446,6cyclictest15856-21awk10:40:153
1440799446,6cyclictest15856-21awk10:40:153
1440799445,6cyclictest0-21swapper/309:22:583
1440799444,6cyclictest401ktimersoftd/307:25:183
134491440,5ptp4l0-21swapper/109:40:111
134491440,5ptp4l0-21swapper/012:00:200
134491440,4ptp4l9978-21apt-get08:10:120
134491440,4ptp4l17260-21apt-get09:35:120
134491440,4ptp4l0-21swapper/309:05:003
134491440,4ptp4l0-21swapper/111:52:241
134491440,4ptp4l0-21swapper/111:12:581
134491440,4ptp4l0-21swapper/111:12:581
134491440,4ptp4l0-21swapper/107:48:401
134491440,4ptp4l0-21swapper/107:48:401
134491440,3ptp4l0-21swapper/010:54:170
134491440,3ptp4l0-21swapper/008:43:230
134491440,3ptp4l0-21swapper/008:24:410
134491440,10ptp4l0-21swapper/007:20:590
1440799436,7cyclictest8305-21cat10:25:013
1440799436,6cyclictest0-21swapper/307:23:113
134491430,9ptp4l0-21swapper/012:11:020
134491430,9ptp4l0-21swapper/011:54:200
134491430,5ptp4l27085-21apt-get12:15:140
134491430,4ptp4l3947-21apt-get12:35:110
134491430,3ptp4l0-21swapper/010:47:030
1440799423,5cyclictest0-21swapper/308:15:283
1440799421,8cyclictest23939-21runrttasks09:49:393
134491420,5ptp4l11708-21python09:20:250
134491420,5ptp4l0-21swapper/110:40:101
134491420,5ptp4l0-21swapper/110:40:101
134491420,5ptp4l0-21swapper/110:00:131
134491420,5ptp4l0-21swapper/009:30:210
134491420,5ptp4l0-21swapper/009:00:280
134491420,4ptp4l3346-21apt-get10:15:030
134491420,4ptp4l0-21swapper/107:51:241
134491420,2ptp4l0-21swapper/312:02:293
1440799415,6cyclictest0-21swapper/309:28:013
1440799415,11cyclictest0-21swapper/311:40:093
1440799415,11cyclictest0-21swapper/311:40:093
14407994122,17cyclictest41-21ksoftirqd/312:19:283
134491410,5ptp4l0-21swapper/110:45:111
134491410,5ptp4l0-21swapper/108:10:141
134491410,5ptp4l0-21swapper/009:10:140
134491410,5ptp4l0-21swapper/007:30:140
134491410,4ptp4l26730-21apt-get09:55:101
134491410,4ptp4l0-21swapper/107:33:401
134491410,3ptp4l6098-21apt-get11:30:110
134491410,3ptp4l5288-21python12:35:251
134491410,3ptp4l28671-21apt-get08:50:120
134491410,3ptp4l26938-21apt-get11:05:110
134491410,3ptp4l10726-21apt-get10:30:120
1440799404,6cyclictest0-21swapper/311:26:593
1440799400,5cyclictest41-21ksoftirqd/312:25:253
134491400,5ptp4l11744-21ls10:30:233
134491400,5ptp4l0-21swapper/110:32:411
134491400,5ptp4l0-21swapper/012:20:160
134491400,5ptp4l0-21swapper/011:00:250
134491400,4ptp4l8605-21df11:35:151
134491400,4ptp4l7988-21df_inode08:05:141
134491400,4ptp4l7899-21df08:05:140
134491400,4ptp4l32651-21ntp_states11:15:231
134491400,4ptp4l27887-21meminfo11:05:201
134491400,4ptp4l21617-21df07:25:140
134491400,4ptp4l19937-21diskstats09:40:130
134491400,4ptp4l17309-21iostat_ios07:15:191
134491400,4ptp4l0-21swapper/308:30:583
134491400,4ptp4l0-21swapper/111:20:141
134491400,4ptp4l0-21swapper/110:05:211
134491400,4ptp4l0-21swapper/109:21:391
134491400,4ptp4l0-21swapper/109:10:151
134491400,4ptp4l0-21swapper/012:06:380
134491400,4ptp4l0-21swapper/010:05:230
134491400,4ptp4l0-21swapper/009:53:090
134491400,4ptp4l0-21swapper/007:35:160
134491400,3ptp4l22946-21ls09:45:230
134491400,3ptp4l10711-21apt-get11:40:120
134491400,3ptp4l10711-21apt-get11:40:120
134491400,2ptp4l2318-21gnome-shell07:55:580
134691390,8getstats18318-21swap08:25:250
134491390,5ptp4l0-21swapper/108:40:171
134491390,5ptp4l0-21swapper/011:10:260
134491390,5ptp4l0-21swapper/011:10:260
134491390,4ptp4l7582-21apt-get09:15:030
134491390,4ptp4l0-21swapper/207:06:102
134491390,4ptp4l0-21swapper/108:00:181
134491390,4ptp4l0-21swapper/011:46:380
134491390,4ptp4l0-21swapper/010:13:390
134491390,4ptp4l0-21swapper/008:32:590
134491390,3ptp4l6439-21diskstats10:20:171
134491390,3ptp4l23060-21iostat_ios12:05:171
134491390,3ptp4l18463-21users07:15:280
134491390,3ptp4l0-21swapper/009:07:560
134491380,5ptp4l0-21swapper/307:06:593
134491380,4ptp4l29623-21mailstats07:40:240
134491380,4ptp4l0-21swapper/308:14:143
134491380,4ptp4l0-21swapper/307:45:463
134491380,4ptp4l0-21swapper/307:45:463
134491380,4ptp4l0-21swapper/112:20:291
134491380,4ptp4l0-21swapper/112:15:201
134491380,4ptp4l0-21swapper/111:58:231
134491380,4ptp4l0-21swapper/110:15:251
134491380,4ptp4l0-21swapper/010:55:070
134491370,4ptp4l0-21swapper/111:46:431
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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