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2026-01-09 - 15:02
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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 Jan 09, 2026 00:45:40)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
134491700,4ptp4l0-21swapper/322:20:273
134491680,4ptp4l12843-21apt-get19:20:113
134491680,4ptp4l12843-21apt-get19:20:113
813299661,62cyclictest21253-21kworker/1:120:34:291
134491660,5ptp4l0-21swapper/221:15:112
134491650,3ptp4l0-21swapper/200:15:152
813299642,59cyclictest32211-21kworker/1:222:22:481
134491630,5ptp4l0-21swapper/023:55:150
134491630,4ptp4l8305-21mailstats22:35:242
134491630,4ptp4l0-21swapper/223:01:082
8131996214,11cyclictest23152-21seq00:17:380
134491620,4ptp4l0-21swapper/321:35:133
134491620,4ptp4l0-21swapper/319:05:133
134491610,13ptp4l27134-21ps00:25:253
813299607,16cyclictest24543-21chrt20:52:151
8131996015,10cyclictest8033-21seq20:18:490
134491600,4ptp4l0-21swapper/220:05:142
134491600,3ptp4l0-21swapper/222:20:322
813299586,16cyclictest8667-21chrt21:28:181
813199580,54cyclictest212-21systemd-journal22:55:350
134491580,4ptp4l0-21swapper/322:47:323
134491580,3ptp4l0-21swapper/323:41:243
134491580,3ptp4l0-21swapper/123:48:221
134491580,3ptp4l0-21swapper/121:09:121
813299576,16cyclictest11251-21chrt22:43:531
813299572,15cyclictest20372-21cat00:10:271
8131995715,10cyclictest20088-21seq21:51:200
134491570,4ptp4l0-21swapper/320:26:223
134491570,4ptp4l0-21swapper/222:27:522
134491570,3ptp4l0-21swapper/220:55:232
813299566,16cyclictest32050-21chrt23:28:411
813299565,17cyclictest27912-21taskset00:29:181
134491560,4ptp4l17661-21df_abs19:30:123
134491560,3ptp4l0-21swapper/222:59:182
134491560,3ptp4l0-21swapper/221:45:012
813299556,15cyclictest8874-21chrt22:38:111
813299554,11cyclictest15916-21chrt22:53:591
813299554,11cyclictest10103-21chrt20:20:351
8131995514,6cyclictest134491ptp4l00:25:140
134491550,4ptp4l0-21swapper/320:04:243
134491550,14ptp4l0-21swapper/320:07:283
813299547,15cyclictest24041-21chrt19:44:011
813299546,15cyclictest21706-21chrt19:38:511
813299546,15cyclictest10445-21chrt19:15:081
813299546,15cyclictest10445-21chrt19:15:081
813299546,11cyclictest7998-21chrt20:18:231
813199545,10cyclictest0-21swapper/019:21:360
813199545,10cyclictest0-21swapper/019:21:360
8131995411,15cyclictest8539-21ls22:35:260
134491540,5ptp4l0-21swapper/323:16:163
134491540,4ptp4l0-21swapper/320:20:083
134491540,4ptp4l0-21swapper/300:06:013
134491540,3ptp4l0-21swapper/320:16:183
134491540,3ptp4l0-21swapper/022:16:450
813299534,12cyclictest9924-21taskset19:11:221
813299533,10cyclictest29062-21chrt21:00:541
134491530,5ptp4l0-21swapper/019:30:200
134491530,3ptp4l0-21swapper/219:52:322
134491530,3ptp4l0-21swapper/200:35:192
813299525,16cyclictest32516-21chrt00:39:211
8131995216,9cyclictest12627-21taskset20:27:410
8131995216,33cyclictest22639-21/usr/sbin/munin19:40:160
8131995212,11cyclictest5561-21latency22:30:200
134491520,5ptp4l0-21swapper/322:56:523
134491520,4ptp4l0-21swapper/322:34:173
134491520,4ptp4l0-21swapper/300:33:363
134491520,4ptp4l0-21swapper/200:08:392
813299517,6cyclictest0-21swapper/122:25:151
813299514,11cyclictest1317-21runrttasks23:34:011
813199511,9cyclictest25259-21apt-get22:05:120
134491510,5ptp4l0-21swapper/322:06:413
134491510,3ptp4l0-21swapper/219:47:202
134491510,10ptp4l0-21swapper/319:49:523
813299507,6cyclictest26134-21ntpq20:55:221
813299505,6cyclictest0-21swapper/120:40:161
813299505,6cyclictest0-21swapper/120:40:161
813299505,12cyclictest27247-21chrt23:16:291
813199500,16cyclictest24167-21cat23:10:200
813199500,11cyclictest15128-21phc2sys-jitter22:50:230
813199500,11cyclictest11502-21taskset23:53:330
134491500,5ptp4l0-21swapper/223:34:552
134491500,4ptp4l0-21swapper/300:12:383
134491500,4ptp4l0-21swapper/221:42:502
134491500,3ptp4l0-21swapper/121:19:171
813299497,5cyclictest0-21swapper/120:00:191
134491490,4ptp4l0-21swapper/320:13:473
134491490,3ptp4l0-21swapper/223:43:362
813299486,16cyclictest13418-21chrt22:46:331
813299485,16cyclictest27017-21chrt22:06:211
813299485,16cyclictest11840-21chrt23:55:001
813299485,15cyclictest30722-21chrt19:56:151
813299484,10cyclictest1317-21runrttasks23:42:291
813199482,43cyclictest0-21swapper/020:10:160
813199480,12cyclictest20163-21tail23:00:280
134491480,9ptp4l6358-21iostat19:05:152
134491480,4ptp4l0-21swapper/121:32:001
134491480,3ptp4l0-21swapper/322:41:403
134491480,3ptp4l0-21swapper/319:50:483
813299477,6cyclictest0-21swapper/121:45:231
813299475,11cyclictest17055-21taskset20:35:321
813199472,42cyclictest0-21swapper/020:55:260
813199470,14cyclictest30946-21hddtemp_smartct00:35:150
813199470,12cyclictest2952-21taskset20:05:360
134491470,4ptp4l0-21swapper/019:07:480
813299466,11cyclictest31776-21chrt22:18:161
813299466,10cyclictest24776-21chrt22:02:081
813299464,6cyclictest29136-21grep23:20:221
813299464,11cyclictest20423-21taskset23:02:331
134491460,6ptp4l0-21swapper/321:08:033
134491460,4ptp4l0-21swapper/321:16:153
134491460,4ptp4l0-21swapper/300:00:593
134491460,4ptp4l0-21swapper/300:00:583
134491460,4ptp4l0-21swapper/220:21:172
134491460,3ptp4l0-21swapper/221:32:392
134491460,12ptp4l24128-21missed_timers23:10:202
134491460,11ptp4l0-21swapper/222:17:572
8133994540,3cyclictest33-21ksoftirqd/220:40:002
813299455,17cyclictest1317-21runrttasks20:11:551
813299454,11cyclictest1317-21runrttasks21:56:131
813199452,40cyclictest0-21swapper/019:10:110
813199451,17cyclictest0-21swapper/000:08:550
813199450,14cyclictest21989-21sshd20:46:440
134491450,9ptp4l0-21swapper/220:48:352
134491450,9ptp4l0-21swapper/220:44:572
134491450,9ptp4l0-21swapper/220:44:572
134491450,5ptp4l0-21swapper/300:35:193
134491450,5ptp4l0-21swapper/200:10:142
134491450,4ptp4l18333-21apt-get21:50:132
134491450,4ptp4l0-21swapper/320:38:533
134491450,4ptp4l0-21swapper/319:37:333
134491450,2ptp4l21755-21ntp_states21:55:222
134491450,11ptp4l0-21swapper/221:00:032
8133994438,3cyclictest33-21ksoftirqd/221:39:592
813299447,6cyclictest0-21swapper/100:15:511
813299446,15cyclictest6485-21seq22:32:151
813199442,12cyclictest0-21swapper/023:17:430
8131994418,16cyclictest28570-21taskset19:53:060
813199440,41cyclictest24564-21meminfo00:20:190
813199440,16cyclictest10481-21/usr/sbin/munin21:30:260
813199440,11cyclictest8828-21/usr/sbin/munin20:20:140
813199440,11cyclictest1317-21runrttasks21:09:120
813199440,11cyclictest13046-21taskset20:30:100
134491440,9ptp4l0-21swapper/220:34:312
134491440,4ptp4l9511-21apt-get23:50:112
134491440,4ptp4l13728-21apt-get21:40:100
134491440,4ptp4l0-21swapper/321:20:443
134491440,4ptp4l0-21swapper/220:28:502
134491440,3ptp4l813199cyclictest23:37:410
134491440,3ptp4l0-21swapper/119:28:381
134491440,10ptp4l0-21swapper/219:57:262
8133994338,3cyclictest33-21ksoftirqd/220:19:592
8133994337,3cyclictest33-21ksoftirqd/219:40:002
813299437,6cyclictest0-21swapper/122:10:161
813299437,6cyclictest0-21swapper/122:10:161
813299436,12cyclictest0-21swapper/123:50:401
813299435,6cyclictest0-21swapper/121:52:161
813299435,15cyclictest28582-21chrt19:53:141
813299435,10cyclictest14837-21chrt19:24:191
813299435,10cyclictest14837-21chrt19:24:191
813299434,11cyclictest4132-21taskset23:36:281
813199432,11cyclictest0-21swapper/023:22:220
8131994319,15cyclictest16172-21taskset00:04:090
8131994319,15cyclictest16172-21taskset00:04:090
8131994318,15cyclictest22580-21taskset23:05:410
813199430,41cyclictest25392-21/usr/sbin/munin19:45:200
813199430,11cyclictest1317-21runrttasks21:10:330
134491430,5ptp4l0-21swapper/321:28:583
134491430,5ptp4l0-21swapper/320:45:203
134491430,4ptp4l2318-21gnome-shell21:22:592
134491430,4ptp4l0-21swapper/323:49:163
134491430,4ptp4l0-21swapper/322:39:153
134491430,4ptp4l0-21swapper/020:40:030
134491430,4ptp4l0-21swapper/020:40:030
134491430,3ptp4l8150-21ls23:45:182
134491430,3ptp4l0-21swapper/222:09:252
134491430,10ptp4l0-21swapper/223:58:092
8133994236,3cyclictest33-21ksoftirqd/219:15:182
8133994236,3cyclictest33-21ksoftirqd/219:15:182
8133994210,2cyclictest33-21ksoftirqd/222:50:182
813299424,9cyclictest18571-21chrt00:07:571
813199422,37cyclictest0-21swapper/022:25:260
8131994218,15cyclictest3880-21seq21:16:260
8131994218,15cyclictest11144-21taskset22:42:350
8131994218,11cyclictest28954-21taskset19:55:100
813199421,38cyclictest0-21swapper/020:00:230
813199420,17cyclictest6832-21cat21:25:120
134491420,9ptp4l0-21swapper/222:42:002
134491420,9ptp4l0-21swapper/022:00:040
134491420,8ptp4l0-21swapper/222:14:232
134491420,8ptp4l0-21swapper/222:14:232
134491420,5ptp4l813199cyclictest19:35:180
134491420,5ptp4l0-21swapper/119:07:461
134491420,4ptp4l22257-21apt-get20:50:042
134491420,4ptp4l14188-21apt-get00:00:112
134491420,4ptp4l14188-21apt-get00:00:112
134491420,4ptp4l12251-21irqstats21:35:190
134491420,3ptp4l30108-21apt-get23:25:122
134491420,3ptp4l0-21swapper/300:15:153
813199412,10cyclictest0-21swapper/022:46:400
813199411,37cyclictest0-21swapper/023:30:180
134491410,9ptp4l0-21swapper/220:13:072
134491410,9ptp4l0-21swapper/220:04:172
134491410,8ptp4l0-21swapper/322:18:033
134491410,5ptp4l31940-21apt-get22:20:030
134491410,5ptp4l0-21swapper/200:30:132
134491410,5ptp4l0-21swapper/120:25:111
134491410,4ptp4l32510-21iostat_ios21:10:161
134491410,4ptp4l15144-21apt-get19:25:102
134491410,4ptp4l0-21swapper/323:20:173
134491410,4ptp4l0-21swapper/320:55:193
134491410,4ptp4l0-21swapper/319:15:373
134491410,4ptp4l0-21swapper/319:15:373
134491410,4ptp4l0-21swapper/221:12:172
134491410,4ptp4l0-21swapper/021:00:290
134491410,4ptp4l0-21swapper/019:18:100
134491410,4ptp4l0-21swapper/019:18:100
134491410,3ptp4l27342-21ls00:25:282
134491410,3ptp4l20877-21apt-get23:05:111
134491410,3ptp4l20106-21ntp_states00:10:240
8134994033,4cyclictest41-21ksoftirqd/321:55:123
8133994034,4cyclictest33-21ksoftirqd/223:37:362
8133994034,4cyclictest33-21ksoftirqd/222:30:452
8133994034,3cyclictest33-21ksoftirqd/219:40:122
813299403,11cyclictest1317-21runrttasks19:48:041
134491400,6ptp4l0-21swapper/219:30:182
134491400,5ptp4l0-21swapper/323:30:143
134491400,5ptp4l0-21swapper/321:40:163
134491400,5ptp4l0-21swapper/120:45:121
134491400,5ptp4l0-21swapper/023:45:160
134491400,5ptp4l0-21swapper/020:35:060
134491400,5ptp4l0-21swapper/000:30:070
134491400,4ptp4l7694-21meminfo21:25:192
134491400,4ptp4l2318-21gnome-shell22:03:583
134491400,4ptp4l0-21swapper/323:50:223
134491400,4ptp4l0-21swapper/323:28:163
134491400,4ptp4l0-21swapper/321:10:203
134491400,4ptp4l0-21swapper/321:00:043
134491400,4ptp4l0-21swapper/319:55:263
134491400,4ptp4l0-21swapper/223:05:182
134491400,4ptp4l0-21swapper/121:20:141
134491400,4ptp4l0-21swapper/100:31:441
134491400,4ptp4l0-21swapper/023:40:290
134491400,4ptp4l0-21swapper/023:25:270
134491400,4ptp4l0-21swapper/022:10:140
134491400,4ptp4l0-21swapper/022:10:140
134491400,4ptp4l0-21swapper/021:20:190
134491400,4ptp4l0-21swapper/020:52:280
134491400,4ptp4l0-21swapper/019:25:060
134491400,3ptp4l24736-21ntp_states00:20:221
134491400,3ptp4l18836-21ls20:40:203
134491400,3ptp4l18836-21ls20:40:193
134491400,3ptp4l11867-21apt-get23:55:123
8133993934,3cyclictest33-21ksoftirqd/222:48:582
8133993934,3cyclictest33-21ksoftirqd/219:20:232
8133993934,3cyclictest33-21ksoftirqd/219:20:232
813399391,5cyclictest8733-21iostat_ios19:10:162
813299395,7cyclictest0-21swapper/122:55:191
134491390,4ptp4l31132-21sed21:05:272
134491390,4ptp4l0-21swapper/323:35:383
134491390,4ptp4l0-21swapper/323:12:423
134491390,4ptp4l0-21swapper/323:00:163
134491390,4ptp4l0-21swapper/322:10:173
134491390,4ptp4l0-21swapper/322:10:173
134491390,4ptp4l0-21swapper/321:50:163
134491390,4ptp4l0-21swapper/321:47:593
134491390,4ptp4l0-21swapper/321:30:143
134491390,4ptp4l0-21swapper/320:32:473
134491390,4ptp4l0-21swapper/319:40:183
134491390,4ptp4l0-21swapper/319:25:153
134491390,4ptp4l0-21swapper/300:20:233
134491390,4ptp4l0-21swapper/223:20:152
134491390,4ptp4l0-21swapper/223:15:172
134491390,4ptp4l0-21swapper/222:02:592
134491390,4ptp4l0-21swapper/200:24:392
134491390,4ptp4l0-21swapper/123:10:131
134491390,4ptp4l0-21swapper/121:41:231
134491390,4ptp4l0-21swapper/121:35:241
134491390,4ptp4l0-21swapper/120:05:221
134491390,4ptp4l0-21swapper/021:55:370
134491390,4ptp4l0-21swapper/021:45:170
134491380,4ptp4l15434-21cat22:50:263
134491380,4ptp4l0-21swapper/323:05:163
134491380,4ptp4l0-21swapper/322:26:273
134491380,4ptp4l0-21swapper/320:50:183
134491380,3ptp4l0-21swapper/319:14:543
134491380,3ptp4l0-21swapper/100:00:481
134491380,3ptp4l0-21swapper/100:00:481
134491370,3ptp4l0-21swapper/119:33:171
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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