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2026-08-22 - 22:04
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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 highest latencies:
System rackdslot2.osadl.org (updated Sat Aug 22, 2026 12:45:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
139591233174,25phc2sys0-21swapper/307:06:023
226422205172,22sleep00-21swapper/007:08:220
225312205172,22sleep20-21swapper/207:06:552
224832205171,23sleep10-21swapper/107:06:171
23071996811,20cyclictest26223-21iostat_ios11:45:181
23071996411,19cyclictest12666-21entropy12:25:171
23071996210,11cyclictest13145-21awk09:00:261
268082610,5sleep126809-21sendmail_mailqu07:15:241
2307199619,20cyclictest811-21/usr/sbin/munin12:00:171
23071995913,11cyclictest9208-21timerwakeupswit10:00:271
23071995811,11cyclictest28438-21fschecks_count09:35:141
23071995712,11cyclictest11901-21/usr/sbin/munin11:15:181
23071995612,12cyclictest9427-21fschecks_time11:10:141
23071995610,11cyclictest31626-21/usr/sbin/munin11:55:231
23071995610,11cyclictest217-21systemd-journal08:52:441
23071995512,9cyclictest27481-21/usr/sbin/munin08:25:191
23071995512,11cyclictest17886-21/usr/sbin/munin09:10:271
23071995510,19cyclictest20825-21wc11:35:131
23072995429,3cyclictest33-21ksoftirqd/208:50:162
23071995411,12cyclictest12093-21taskset07:54:421
23071995311,10cyclictest21508-21runrttasks10:29:111
2307099532,6cyclictest101ktimersoftd/010:40:190
23072995214,4cyclictest33-21ksoftirqd/212:25:192
2307199527,10cyclictest7490-21latency_hist07:45:001
23071995111,12cyclictest7949-21/usr/sbin/munin11:05:281
23071995111,11cyclictest14142-21taskset10:11:011
23071995110,13cyclictest24490-21df10:35:141
23071995110,12cyclictest30238-21missed_timers08:30:211
23071995110,11cyclictest4978-21cut08:45:181
139291510,1ptp4l391rcuc/309:00:303
271782500,2sleep00-21swapper/007:15:260
2307199509,11cyclictest25374-21sort07:15:001
23071995010,17cyclictest4277-21grep12:05:261
23072994916,4cyclictest33-21ksoftirqd/210:25:162
2307199499,11cyclictest10190-21sh12:20:141
23071994910,17cyclictest15664-21/usr/sbin/munin12:30:211
23072994843,3cyclictest33-21ksoftirqd/209:14:592
2307199489,12cyclictest23143-21ptp4l10:30:241
23071994811,12cyclictest31849-21/usr/sbin/munin07:25:241
23072994738,2cyclictest33-21ksoftirqd/211:30:172
23072994718,4cyclictest33-21ksoftirqd/211:58:312
23072994717,4cyclictest33-21ksoftirqd/209:35:152
23072994712,7cyclictest33-21ksoftirqd/211:10:012
23072994712,3cyclictest33-21ksoftirqd/211:30:002
23072994642,3cyclictest33-21ksoftirqd/211:45:002
23072994618,6cyclictest33-21ksoftirqd/207:55:222
23072994618,6cyclictest33-21ksoftirqd/207:55:212
23072994616,7cyclictest33-21ksoftirqd/212:30:232
23072994615,7cyclictest33-21ksoftirqd/210:35:012
23071994611,11cyclictest7024-21taskset12:11:581
2307099466,5cyclictest9-21ksoftirqd/010:45:180
2307099462,6cyclictest9-21ksoftirqd/012:10:270
2307099462,5cyclictest9-21ksoftirqd/010:30:140
23072994531,11cyclictest311rcuc/212:05:002
23072994515,4cyclictest33-21ksoftirqd/208:45:112
23072994514,7cyclictest33-21ksoftirqd/211:05:242
2307199459,11cyclictest23059-21latency08:15:201
23071994512,9cyclictest31020-21chrt10:46:381
23071994511,13cyclictest5194-21cat07:40:001
2307099454,5cyclictest9-21ksoftirqd/010:50:260
139291450,0ptp4l401ktimersoftd/308:20:123
139291450,0ptp4l401ktimersoftd/307:20:043
2307299449,5cyclictest33-21ksoftirqd/207:20:222
2307299448,4cyclictest33-21ksoftirqd/208:00:242
2307299446,4cyclictest121rcu_preempt10:40:012
23072994432,9cyclictest33-21ksoftirqd/208:15:192
23072994414,7cyclictest33-21ksoftirqd/209:55:162
23072994413,4cyclictest33-21ksoftirqd/207:10:152
23072994412,3cyclictest33-21ksoftirqd/210:10:132
23072994410,3cyclictest33-21ksoftirqd/207:30:202
23071994412,16cyclictest955-21chrt08:36:031
23071994410,10cyclictest1457-21missed_timers07:30:211
2307299439,4cyclictest33-21ksoftirqd/210:55:222
2307299437,4cyclictest33-21ksoftirqd/211:15:192
2307299437,3cyclictest33-21ksoftirqd/209:45:282
23072994324,16cyclictest33-21ksoftirqd/212:10:012
23072994318,7cyclictest33-21ksoftirqd/212:20:202
23072994314,7cyclictest33-21ksoftirqd/211:50:192
23072994314,7cyclictest33-21ksoftirqd/210:35:242
23072994314,4cyclictest33-21ksoftirqd/207:25:152
23072994312,8cyclictest33-21ksoftirqd/209:00:182
23072994312,7cyclictest33-21ksoftirqd/208:05:212
23072994311,4cyclictest33-21ksoftirqd/209:15:252
2307099431,6cyclictest9-21ksoftirqd/009:45:230
23072994214,7cyclictest33-21ksoftirqd/207:50:182
23072994212,7cyclictest33-21ksoftirqd/210:15:192
23072994212,4cyclictest33-21ksoftirqd/211:20:142
23072994212,4cyclictest33-21ksoftirqd/209:25:212
23072994211,8cyclictest33-21ksoftirqd/207:50:002
23072994210,4cyclictest33-21ksoftirqd/211:00:222
2307099427,5cyclictest9-21ksoftirqd/009:50:220
2307099425,6cyclictest9-21ksoftirqd/007:40:180
2307099425,5cyclictest9-21ksoftirqd/008:25:180
2307099422,6cyclictest9-21ksoftirqd/007:50:290
2307299418,3cyclictest33-21ksoftirqd/207:40:152
2307299417,6cyclictest33-21ksoftirqd/208:40:162
23072994136,3cyclictest33-21ksoftirqd/211:40:002
23072994129,3cyclictest33-21ksoftirqd/210:05:162
23072994127,12cyclictest33-21ksoftirqd/210:50:012
23072994113,6cyclictest33-21ksoftirqd/209:05:152
23072994112,7cyclictest33-21ksoftirqd/209:50:222
23072994111,8cyclictest33-21ksoftirqd/208:55:222
23072994110,7cyclictest33-21ksoftirqd/211:45:192
23072994110,7cyclictest33-21ksoftirqd/207:15:232
2307199416,10cyclictest0-21swapper/109:15:131
23071994112,12cyclictest11147-21apt09:00:001
23071994111,16cyclictest15168-21cut09:05:241
2307099415,5cyclictest9-21ksoftirqd/011:00:250
2307099412,6cyclictest9-21ksoftirqd/012:20:130
139291410,2ptp4l0-21swapper/307:39:193
139291410,0ptp4l401ktimersoftd/308:30:263
2307299408,10cyclictest33-21ksoftirqd/207:35:252
23072994035,3cyclictest33-21ksoftirqd/212:15:002
23072994033,4cyclictest9718-21cron10:05:002
2307299401,5cyclictest33-21ksoftirqd/208:20:222
23072994012,7cyclictest33-21ksoftirqd/212:15:182
23072994011,6cyclictest33-21ksoftirqd/212:35:272
23072994010,4cyclictest33-21ksoftirqd/209:30:152
2307199407,9cyclictest0-21swapper/109:20:011
23071994011,13cyclictest14948-21taskset08:00:021
23071994010,17cyclictest15968-21cat11:25:001
139472400,4sleep013951-21timerwakeupswit10:10:250
139291400,0ptp4l401ktimersoftd/307:57:593
139291400,0ptp4l401ktimersoftd/307:57:593
2307299396,2cyclictest33-21ksoftirqd/210:53:052
23072993932,4cyclictest33-21ksoftirqd/210:23:032
2307299392,3cyclictest33-21ksoftirqd/209:20:252
23071993910,11cyclictest1997-21/usr/sbin/munin08:40:151
2307099392,5cyclictest9-21ksoftirqd/012:30:330
23073993833,3cyclictest41-21ksoftirqd/310:45:233
23073993832,4cyclictest41-21ksoftirqd/309:38:393
23072993834,2cyclictest33-21ksoftirqd/209:40:152
2307299382,2cyclictest33-21ksoftirqd/208:30:182
2307299382,10cyclictest121rcu_preempt08:35:202
23072993811,6cyclictest33-21ksoftirqd/208:25:212
2307199389,15cyclictest21124-21python08:10:251
2307199388,11cyclictest0-21swapper/111:40:251
23071993811,12cyclictest16242-21sed10:15:271
23071993810,11cyclictest17496-21sensors11:25:261
2307099382,6cyclictest9-21ksoftirqd/008:49:250
2307099382,5cyclictest9-21ksoftirqd/010:06:200
2307099381,6cyclictest9-21ksoftirqd/010:27:340
23073993732,3cyclictest41-21ksoftirqd/311:22:013
23073993732,3cyclictest41-21ksoftirqd/308:29:593
23073993731,4cyclictest41-21ksoftirqd/312:20:303
23073993731,4cyclictest41-21ksoftirqd/309:45:423
23073993730,4cyclictest41-21ksoftirqd/308:55:583
23072993731,4cyclictest33-21ksoftirqd/208:13:492
2307099376,5cyclictest9-21ksoftirqd/009:05:140
2307099373,8cyclictest9-21ksoftirqd/008:50:030
2307099372,7cyclictest9-21ksoftirqd/008:11:550
2307099372,6cyclictest9-21ksoftirqd/010:21:570
2307099372,5cyclictest9-21ksoftirqd/009:19:250
2307099371,6cyclictest9-21ksoftirqd/009:56:000
2307099371,6cyclictest9-21ksoftirqd/008:07:050
139291370,1ptp4l2047-21users12:00:283
139291370,0ptp4l401ktimersoftd/311:55:313
23073993631,3cyclictest41-21ksoftirqd/310:10:103
23073993631,3cyclictest41-21ksoftirqd/310:09:593
23073993630,4cyclictest41-21ksoftirqd/312:17:093
23073993630,4cyclictest41-21ksoftirqd/311:52:543
23073993630,4cyclictest41-21ksoftirqd/310:56:233
23073993630,4cyclictest41-21ksoftirqd/310:01:423
23073993630,4cyclictest41-21ksoftirqd/309:56:483
23073993630,4cyclictest41-21ksoftirqd/309:54:003
23073993630,4cyclictest41-21ksoftirqd/309:12:443
23073993630,4cyclictest41-21ksoftirqd/309:06:343
23073993630,4cyclictest41-21ksoftirqd/307:54:463
23071993630,4cyclictest25-21ksoftirqd/110:05:331
23071993611,11cyclictest29774-21taskset11:51:241
23071993610,16cyclictest1-21systemd09:49:521
2307099363,4cyclictest9-21ksoftirqd/007:10:110
23070993629,4cyclictest9-21ksoftirqd/012:03:410
23070993629,4cyclictest9-21ksoftirqd/010:36:260
2307099362,5cyclictest9-21ksoftirqd/011:32:040
2307099362,5cyclictest9-21ksoftirqd/010:55:200
2307099361,6cyclictest9-21ksoftirqd/008:18:130
2307099361,5cyclictest9-21ksoftirqd/007:25:120
2307099360,7cyclictest9-21ksoftirqd/009:27:490
23073993530,3cyclictest41-21ksoftirqd/310:18:243
23073993529,4cyclictest41-21ksoftirqd/311:38:143
23073993529,4cyclictest41-21ksoftirqd/308:54:113
23073993529,4cyclictest41-21ksoftirqd/308:48:213
23073993529,4cyclictest41-21ksoftirqd/308:03:193
2307199359,17cyclictest0-21swapper/108:20:261
2307199359,11cyclictest23795-21smartctl09:25:181
2307199356,19cyclictest0-21swapper/110:20:131
23071993528,4cyclictest25-21ksoftirqd/112:16:231
23070993530,3cyclictest9-21ksoftirqd/009:20:410
23070993529,4cyclictest9-21ksoftirqd/011:10:390
23070993529,4cyclictest9-21ksoftirqd/011:08:060
23070993528,4cyclictest19333-21cron12:40:000
2307099352,5cyclictest9-21ksoftirqd/009:43:210
2307099350,7cyclictest9-21ksoftirqd/007:55:190
2307099350,7cyclictest9-21ksoftirqd/007:55:180
23073993429,3cyclictest41-21ksoftirqd/310:40:343
23073993429,3cyclictest41-21ksoftirqd/308:42:253
23073993429,2cyclictest139291ptp4l12:33:493
23073993428,4cyclictest41-21ksoftirqd/307:13:183
2307199348,16cyclictest0-21swapper/111:00:151
2307199346,17cyclictest0-21swapper/109:40:141
2307099345,4cyclictest9-21ksoftirqd/011:54:410
23070993428,4cyclictest9-21ksoftirqd/008:24:060
23070993427,4cyclictest9-21ksoftirqd/008:04:540
2307099342,6cyclictest9-21ksoftirqd/010:15:270
23073993328,3cyclictest41-21ksoftirqd/311:25:423
23073993328,3cyclictest41-21ksoftirqd/307:34:313
23073993327,4cyclictest41-21ksoftirqd/312:06:333
23073993327,4cyclictest41-21ksoftirqd/311:42:193
23073993327,4cyclictest41-21ksoftirqd/310:27:373
23073993327,4cyclictest41-21ksoftirqd/309:43:503
23073993327,4cyclictest41-21ksoftirqd/309:20:583
2307199339,8cyclictest3880-21memory09:50:211
2307199336,17cyclictest0-21swapper/109:55:131
2307199335,9cyclictest0-21swapper/109:30:371
23070993327,4cyclictest9-21ksoftirqd/012:15:140
23070993326,4cyclictest9-21ksoftirqd/011:37:270
23070993326,4cyclictest9-21ksoftirqd/011:23:030
23073993228,3cyclictest41-21ksoftirqd/309:31:413
23073993227,3cyclictest41-21ksoftirqd/312:36:073
23073993227,3cyclictest41-21ksoftirqd/312:27:413
23073993227,3cyclictest41-21ksoftirqd/309:19:523
23073993227,3cyclictest41-21ksoftirqd/308:09:053
23073993227,3cyclictest41-21ksoftirqd/307:42:133
23073993227,3cyclictest41-21ksoftirqd/307:17:443
23073993226,4cyclictest41-21ksoftirqd/311:31:363
23073993226,4cyclictest41-21ksoftirqd/307:46:403
23071993227,3cyclictest25-21ksoftirqd/110:56:551
23071993227,3cyclictest25-21ksoftirqd/108:05:121
2307099324,4cyclictest9-21ksoftirqd/009:35:180
23070993226,4cyclictest9-21ksoftirqd/009:04:350
23070993226,4cyclictest9-21ksoftirqd/008:55:360
23070993225,4cyclictest9-21ksoftirqd/011:47:140
23073993126,3cyclictest41-21ksoftirqd/311:01:533
23073993126,3cyclictest41-21ksoftirqd/308:38:153
23073993126,3cyclictest41-21ksoftirqd/307:25:283
23073993125,4cyclictest41-21ksoftirqd/310:36:403
23073993125,4cyclictest41-21ksoftirqd/310:31:313
23073993125,4cyclictest41-21ksoftirqd/308:18:253
2307199318,10cyclictest0-21swapper/110:53:181
2307199315,9cyclictest0-21swapper/107:55:271
2307199315,9cyclictest0-21swapper/107:55:261
23071993126,3cyclictest25-21ksoftirqd/111:31:181
23071993112,16cyclictest8121-21fschecks_time07:45:161
23070993125,4cyclictest9-21ksoftirqd/009:11:330
139291310,0ptp4l401ktimersoftd/310:20:193
23073993025,3cyclictest41-21ksoftirqd/312:10:343
23073993025,3cyclictest41-21ksoftirqd/311:17:163
23073993024,4cyclictest41-21ksoftirqd/308:12:073
2307199309,8cyclictest27465-21irqrtprio10:40:191
2307199309,8cyclictest18314-21ls12:35:221
2307099302,5cyclictest9-21ksoftirqd/008:38:420
23070993025,3cyclictest9-21ksoftirqd/012:06:030
23073992924,3cyclictest41-21ksoftirqd/311:47:143
23073992924,3cyclictest41-21ksoftirqd/311:10:543
23071992916,7cyclictest28073-21apt-get07:20:131
23070992924,3cyclictest9-21ksoftirqd/007:33:330
23070992924,3cyclictest9-21ksoftirqd/007:24:490
23070992923,4cyclictest9-21ksoftirqd/011:43:080
2307399284,5cyclictest1308-21runrttasks10:50:163
23073992823,3cyclictest41-21ksoftirqd/311:09:083
2307099286,5cyclictest9-21ksoftirqd/011:28:340
2307099283,4cyclictest9-21ksoftirqd/007:45:190
23070992823,3cyclictest9-21ksoftirqd/011:17:450
23070992821,4cyclictest9-21ksoftirqd/009:31:430
23070992821,4cyclictest9-21ksoftirqd/008:31:340
2307099280,6cyclictest9-21ksoftirqd/012:25:200
23073992722,3cyclictest41-21ksoftirqd/309:26:293
2307099277,4cyclictest9-21ksoftirqd/008:40:260
2307099276,5cyclictest9-21ksoftirqd/011:55:190
23070992722,3cyclictest9-21ksoftirqd/007:38:380
23070992620,4cyclictest9-21ksoftirqd/010:00:200
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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