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2026-09-23 - 04:32
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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 rackdslot1.osadl.org (updated Wed Sep 23, 2026 00:45:43)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1912521490,2sleep019123-21grep22:55:280
134491840,8ptp4l0-21swapper/019:05:190
950699739,62cyclictest3708-21kworker/1:223:40:491
950899720,69cyclictest2047-21sed23:30:173
9505996734,7cyclictest9-21ksoftirqd/019:40:000
950899650,62cyclictest31791-21/usr/sbin/munin21:05:233
950899650,29cyclictest30574-21chrt21:04:523
9505996527,4cyclictest9-21ksoftirqd/021:40:010
9505996436,3cyclictest9-21ksoftirqd/021:45:210
950899635,18cyclictest9963-21latency_hist21:30:003
950899631,24cyclictest2318-21gnome-shell23:59:583
9505996329,6cyclictest9-21ksoftirqd/000:00:000
9505996212,9cyclictest9-21ksoftirqd/023:40:000
950899610,23cyclictest134491ptp4l19:55:253
9505996131,7cyclictest9-21ksoftirqd/020:00:010
9505996125,5cyclictest9-21ksoftirqd/000:27:450
950899601,27cyclictest30971-21taskset23:23:043
950899600,27cyclictest745-21taskset23:27:013
950899600,27cyclictest3003-21taskset22:22:103
950899600,26cyclictest28009-21taskset20:56:403
950899600,26cyclictest28009-21taskset20:56:403
950899600,26cyclictest2664-21taskset21:12:493
9505996026,5cyclictest9-21ksoftirqd/023:34:250
9505996025,5cyclictest9-21ksoftirqd/020:40:140
9505996024,5cyclictest9-21ksoftirqd/021:33:300
9505996023,5cyclictest9-21ksoftirqd/022:51:160
950899590,26cyclictest19551-21seq22:59:273
9505995926,4cyclictest9-21ksoftirqd/021:55:210
9505995926,4cyclictest9-21ksoftirqd/021:55:210
134491590,4ptp4l0-21swapper/022:35:140
134491590,4ptp4l0-21swapper/019:25:240
134491590,17ptp4l0-21swapper/123:00:001
950899582,21cyclictest0-21swapper/323:51:063
950899581,24cyclictest28671-21seq23:18:163
9505995823,4cyclictest9-21ksoftirqd/021:41:330
134491580,3ptp4l0-21swapper/221:10:012
134491580,3ptp4l0-21swapper/023:15:140
950899570,26cyclictest846-21taskset00:36:003
950899570,26cyclictest20685-21taskset19:30:593
950899570,26cyclictest10027-21taskset22:38:023
950899570,25cyclictest26286-21taskset22:04:073
950899570,25cyclictest23810-21taskset21:59:513
950899570,25cyclictest23810-21taskset21:59:513
950899570,25cyclictest16196-21taskset19:22:173
950899570,24cyclictest2568-21seq20:03:313
950899570,24cyclictest14139-21taskset20:28:283
950899570,23cyclictest19467-21taskset00:08:233
9505995731,6cyclictest9-21ksoftirqd/000:15:200
9505995726,5cyclictest9-21ksoftirqd/021:15:180
9505995723,5cyclictest9-21ksoftirqd/022:21:530
9505995722,4cyclictest9-21ksoftirqd/021:22:190
134491570,4ptp4l0-21swapper/119:05:241
134491570,3ptp4l0-21swapper/022:00:390
950899562,21cyclictest0-21swapper/323:12:163
950899561,25cyclictest13648-21taskset19:17:023
950899560,27cyclictest11284-21taskset19:11:103
950899560,26cyclictest27783-21taskset19:48:243
950899560,26cyclictest23858-21taskset23:05:343
950899560,24cyclictest7238-21taskset21:21:323
950899560,24cyclictest26553-21taskset00:23:043
9505995629,4cyclictest9-21ksoftirqd/023:07:240
9505995627,6cyclictest9-21ksoftirqd/022:05:140
9505995627,3cyclictest9-21ksoftirqd/022:16:100
9505995626,4cyclictest9-21ksoftirqd/020:47:390
9505995622,5cyclictest9-21ksoftirqd/019:13:130
9505995620,5cyclictest9-21ksoftirqd/000:35:180
134491560,4ptp4l0-21swapper/219:29:142
950899555,19cyclictest103722chrt23:49:483
950899552,51cyclictest0-21swapper/319:25:263
950899552,20cyclictest0-21swapper/320:52:343
950899550,26cyclictest8035-21taskset23:44:263
950899550,26cyclictest643-21taskset22:17:513
950899550,26cyclictest21802-21taskset23:03:343
950899550,26cyclictest17077-21taskset22:52:063
950899550,25cyclictest28514-21chrt22:08:153
950899550,25cyclictest21291-21taskset21:51:573
9505995523,4cyclictest9-21ksoftirqd/023:25:180
9505995523,3cyclictest9-21ksoftirqd/020:58:590
9505995523,3cyclictest9-21ksoftirqd/020:58:590
9505995522,3cyclictest9-21ksoftirqd/019:23:500
9505995521,5cyclictest9-21ksoftirqd/019:31:140
134491550,5ptp4l0-21swapper/223:13:422
134491550,4ptp4l0-21swapper/023:22:460
134491550,4ptp4l0-21swapper/019:40:510
950899542,25cyclictest0-21swapper/321:15:113
950899540,25cyclictest9495-21taskset20:18:093
950899540,25cyclictest21621-21taskset20:45:133
9505995426,5cyclictest9-21ksoftirqd/021:50:270
9505995425,7cyclictest9-21ksoftirqd/020:51:480
9505995423,7cyclictest9-21ksoftirqd/023:45:190
9505995422,5cyclictest9-21ksoftirqd/000:00:180
9505995422,5cyclictest9-21ksoftirqd/000:00:180
9505995422,4cyclictest9-21ksoftirqd/000:21:470
9505995421,4cyclictest9-21ksoftirqd/022:50:000
9505995418,5cyclictest9-21ksoftirqd/020:00:140
134491540,3ptp4l0-21swapper/121:39:121
134491540,3ptp4l0-21swapper/120:53:391
950899531,21cyclictest24244-21chrt00:18:133
950899530,26cyclictest11953-21taskset20:24:513
950899530,25cyclictest4868-21seq20:08:333
9505995326,6cyclictest9-21ksoftirqd/022:25:190
9505995323,5cyclictest9-21ksoftirqd/020:10:140
9505995323,4cyclictest9-21ksoftirqd/022:10:530
9505995322,4cyclictest9-21ksoftirqd/020:36:120
9505995322,4cyclictest9-21ksoftirqd/020:15:250
9505995318,5cyclictest9-21ksoftirqd/019:45:270
9505995318,3cyclictest9-21ksoftirqd/020:25:010
134491530,6ptp4l0-21swapper/219:05:292
134491530,4ptp4l0-21swapper/222:40:572
134491530,14ptp4l0-21swapper/123:53:221
950899520,25cyclictest7707-21taskset22:32:523
9505995221,4cyclictest9-21ksoftirqd/020:05:250
134491520,4ptp4l0-21swapper/223:18:322
134491520,4ptp4l0-21swapper/200:32:482
134491520,4ptp4l0-21swapper/200:32:482
950899512,19cyclictest0-21swapper/321:42:213
950899512,19cyclictest0-21swapper/300:31:393
950899512,19cyclictest0-21swapper/300:31:383
950899510,25cyclictest30120-21taskset19:51:093
9505995125,6cyclictest9-21ksoftirqd/022:40:170
9505995124,3cyclictest9-21ksoftirqd/000:05:190
9505995118,5cyclictest9-21ksoftirqd/019:15:170
9505995117,5cyclictest9-21ksoftirqd/023:50:260
9505995115,10cyclictest9-21ksoftirqd/021:25:150
134491510,4ptp4l0-21swapper/023:39:390
134491510,4ptp4l0-21swapper/022:33:320
134491510,3ptp4l950699cyclictest19:21:031
950899501,24cyclictest21969-21taskset00:13:283
950899500,27cyclictest28977-21seq00:29:443
950899500,27cyclictest17120-21seq00:02:443
950899500,27cyclictest17120-21seq00:02:443
950899500,26cyclictest14225-21taskset21:37:403
9505995013,5cyclictest9-21ksoftirqd/021:05:010
9505995013,4cyclictest9-21ksoftirqd/020:30:170
950899491,24cyclictest5218-21seq20:10:093
134491490,4ptp4l0-21swapper/220:28:322
134491490,4ptp4l0-21swapper/023:11:290
134491490,3ptp4l0-21swapper/219:37:002
134491490,3ptp4l0-21swapper/120:18:341
950899480,27cyclictest5413-21seq23:36:173
950899480,23cyclictest11980-21taskset21:33:193
950899470,23cyclictest16386-21taskset20:32:513
9505994716,6cyclictest9-21ksoftirqd/023:00:190
950599470,3cyclictest30462-21idleruntime-cro19:55:010
134491470,4ptp4l0-21swapper/021:13:210
134491470,3ptp4l0-21swapper/122:46:451
9505994631,7cyclictest9-21ksoftirqd/021:10:010
134491460,8ptp4l0-21swapper/121:00:161
134491460,11ptp4l0-21swapper/220:02:052
950899452,23cyclictest0-21swapper/322:27:513
950899450,29cyclictest25614-21cron19:45:003
950599451,3cyclictest9-21ksoftirqd/000:15:010
950599450,7cyclictest9-21ksoftirqd/020:25:150
134491450,7ptp4l0-21swapper/122:04:141
134491450,5ptp4l0-21swapper/319:05:363
134491450,4ptp4l0-21swapper/100:02:511
134491450,4ptp4l0-21swapper/100:02:511
134491450,3ptp4l0-21swapper/120:59:551
134491450,3ptp4l0-21swapper/120:59:551
134491450,3ptp4l0-21swapper/120:09:211
950899447,25cyclictest0-21swapper/322:11:593
950899442,22cyclictest0-21swapper/322:45:373
950899441,12cyclictest134691getstats20:36:333
9507994438,3cyclictest33-21ksoftirqd/220:20:002
9507994429,4cyclictest33-21ksoftirqd/223:45:352
9505994435,3cyclictest9-21ksoftirqd/000:30:140
9505994435,3cyclictest9-21ksoftirqd/000:30:140
134491440,9ptp4l0-21swapper/223:22:342
134491440,9ptp4l0-21swapper/222:36:012
134491440,9ptp4l0-21swapper/220:34:032
134491440,9ptp4l0-21swapper/200:16:022
134491440,5ptp4l28058-21apt-config19:50:011
134491440,10ptp4l0-21swapper/221:39:052
950899432,24cyclictest0-21swapper/321:48:083
9507994331,9cyclictest33-21ksoftirqd/220:45:312
134491430,9ptp4l0-21swapper/221:47:272
134491430,9ptp4l0-21swapper/221:44:022
134491430,9ptp4l0-21swapper/200:27:242
134491430,4ptp4l12217-21apt-get20:25:131
134491430,4ptp4l11834-21apt-get19:15:112
134491430,3ptp4l0-21swapper/100:39:021
134491430,10ptp4l0-21swapper/222:06:452
9507994236,3cyclictest33-21ksoftirqd/221:10:232
9507994219,16cyclictest33-21ksoftirqd/223:00:192
9506994213,28cyclictest0-21swapper/123:45:391
134491420,9ptp4l25-21ksoftirqd/121:30:571
134491420,9ptp4l0-21swapper/222:01:452
134491420,8ptp4l0-21swapper/221:56:572
134491420,8ptp4l0-21swapper/221:56:572
134491420,7ptp4l29692-21phc2sys21:00:242
134491420,6ptp4l0-21swapper/200:23:142
134491420,5ptp4l22978-21python20:45:291
134491420,5ptp4l0-21swapper/123:25:241
134491420,5ptp4l0-21swapper/123:05:191
134491420,5ptp4l0-21swapper/122:35:271
134491420,5ptp4l0-21swapper/122:05:181
134491420,5ptp4l0-21swapper/121:40:271
134491420,5ptp4l0-21swapper/121:10:321
134491420,5ptp4l0-21swapper/120:20:201
134491420,5ptp4l0-21swapper/100:30:141
134491420,5ptp4l0-21swapper/100:30:131
134491420,4ptp4l5804-21iostat20:10:181
134491420,4ptp4l22372-21ntp_states19:35:251
134491420,4ptp4l11234-21iostat_ios22:40:161
134491420,4ptp4l0-21swapper/100:10:291
134491420,3ptp4l6037-21apt-get23:40:102
134491420,3ptp4l30671-21apt-get19:55:132
134491420,3ptp4l15355-21irqstats20:30:201
134491420,3ptp4l1431-21diskstats22:20:211
950899412,23cyclictest0-21swapper/319:36:533
950899412,19cyclictest0-21swapper/322:40:283
9507994137,3cyclictest33-21ksoftirqd/200:10:012
9507994137,2cyclictest33-21ksoftirqd/222:20:002
9507994136,3cyclictest33-21ksoftirqd/220:10:002
9507994136,3cyclictest33-21ksoftirqd/219:50:012
9507994135,4cyclictest33-21ksoftirqd/219:30:432
950699412,38cyclictest6636-21kworker/1:221:26:281
134491410,9ptp4l0-21swapper/222:57:472
134491410,8ptp4l0-21swapper/200:04:112
134491410,8ptp4l0-21swapper/200:04:112
134491410,5ptp4l0-21swapper/223:25:182
134491410,5ptp4l0-21swapper/100:05:171
134491410,4ptp4l4108-21ls21:15:231
134491410,4ptp4l28077-21ntp_states00:25:231
134491410,4ptp4l27713-21memory23:15:221
134491410,4ptp4l25236-21users19:40:291
134491410,4ptp4l14365-21apt-get19:20:102
134491410,4ptp4l0-21swapper/221:53:372
134491410,4ptp4l0-21swapper/221:25:072
134491410,3ptp4l5411-21apt-get21:20:141
134491410,3ptp4l17193-21apt-get21:45:131
134491410,3ptp4l16804-21apt-get20:35:111
134491410,3ptp4l0-21swapper/123:35:261
134491410,3ptp4l0-21swapper/100:21:261
9507994036,2cyclictest33-21ksoftirqd/220:35:172
9507994035,3cyclictest33-21ksoftirqd/221:20:002
9507994034,3cyclictest33-21ksoftirqd/200:15:012
134491400,8ptp4l0-21swapper/223:31:412
134491400,4ptp4l17197-21/usr/sbin/munin19:25:171
134491400,4ptp4l0-21swapper/223:56:122
134491400,4ptp4l0-21swapper/223:09:252
134491400,4ptp4l0-21swapper/222:46:072
134491400,4ptp4l0-21swapper/221:32:072
134491400,4ptp4l0-21swapper/220:57:292
134491400,4ptp4l0-21swapper/220:57:292
134491400,4ptp4l0-21swapper/220:10:132
134491400,4ptp4l0-21swapper/123:55:231
134491400,4ptp4l0-21swapper/123:23:061
134491400,4ptp4l0-21swapper/123:11:551
134491400,4ptp4l0-21swapper/122:30:251
134491400,4ptp4l0-21swapper/122:25:151
134491400,4ptp4l0-21swapper/121:50:121
134491400,4ptp4l0-21swapper/121:05:201
134491400,4ptp4l0-21swapper/119:58:141
134491400,4ptp4l0-21swapper/119:10:001
134491400,3ptp4l28376-21apt-get19:50:142
134491400,3ptp4l23565-21apt-get19:40:142
134491390,5ptp4l0-21swapper/122:50:241
134491390,5ptp4l0-21swapper/122:10:121
134491390,4ptp4l0-21swapper/320:40:313
134491390,4ptp4l0-21swapper/223:50:092
134491390,4ptp4l0-21swapper/223:35:492
134491390,4ptp4l0-21swapper/222:32:112
134491390,4ptp4l0-21swapper/222:13:272
134491390,4ptp4l0-21swapper/221:20:432
134491390,4ptp4l0-21swapper/220:53:342
134491390,4ptp4l0-21swapper/220:44:372
134491390,4ptp4l0-21swapper/219:10:312
134491390,4ptp4l0-21swapper/200:35:032
134491390,4ptp4l0-21swapper/123:30:201
134491390,4ptp4l0-21swapper/122:15:191
134491390,4ptp4l0-21swapper/121:55:231
134491390,4ptp4l0-21swapper/121:55:231
134491390,4ptp4l0-21swapper/120:43:161
134491390,4ptp4l0-21swapper/119:50:011
134491390,4ptp4l0-21swapper/119:30:271
134491390,4ptp4l0-21swapper/119:15:231
134491390,4ptp4l0-21swapper/100:15:041
134491390,3ptp4l0-21swapper/220:20:222
134491390,3ptp4l0-21swapper/123:00:121
134491390,3ptp4l0-21swapper/120:00:241
9507993834,2cyclictest33-21ksoftirqd/222:50:132
134491380,3ptp4l0-21swapper/222:26:292
134491370,4ptp4l0-21swapper/222:20:522
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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