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2026-08-27 - 12:07
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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 Thu Aug 27, 2026 00:45:38)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1149621580,7sleep11165899cyclictest21:25:281
1165999665,12cyclictest2113-21latency_hist20:00:012
47922650,3sleep14791-21rt-features23:30:251
134491650,5ptp4l10086-21irqrtprio19:05:173
134491650,4ptp4l0-21swapper/321:00:213
1165999627,9cyclictest9782-21unixbench_multi22:30:272
1165999626,11cyclictest30735-21ps00:25:252
1165999626,10cyclictest8562-21perl23:40:162
134491590,3ptp4l0-21swapper/319:44:423
1165999597,11cyclictest17895-21unixbench_multi19:20:242
1165999595,11cyclictest3108-21cpuspeed_turbos21:10:112
1165999583,12cyclictest20846-21sed19:30:002
1165999577,13cyclictest0-21swapper/222:55:242
1165999575,10cyclictest14457-21latency_hist21:35:012
1165999573,9cyclictest18863-21systemctl00:00:292
134491560,3ptp4l23030-21ls23:00:201
134491560,3ptp4l0-21swapper/123:15:191
1165999567,9cyclictest28764-21grep22:05:122
1165999565,11cyclictest10513-21cut20:15:182
1165999565,10cyclictest1-21systemd00:06:312
1165999564,11cyclictest27079-21sed20:50:212
134491550,4ptp4l0-21swapper/223:47:052
134491550,3ptp4l0-21swapper/020:20:180
134491550,11ptp4l0-21swapper/219:09:152
1165999556,16cyclictest7374-21expr20:10:132
1165999556,11cyclictest0-21swapper/222:45:162
1165999554,13cyclictest19553-21hddtemp_smartct21:45:162
1165999554,12cyclictest16687-21unixbench_singl23:55:282
1165999553,12cyclictest21641-21df_abs21:50:132
1165999553,10cyclictest0-21swapper/223:35:132
134491540,4ptp4l0-21swapper/000:32:390
1165999547,9cyclictest0-21swapper/221:25:172
1165999546,10cyclictest23939-21ls00:10:272
1165999545,9cyclictest23080-21sed19:34:592
1165999544,9cyclictest29797-21expr20:55:272
1165999544,14cyclictest31860-21ntp_states21:00:232
134491530,4ptp4l0-21swapper/323:30:433
134491530,4ptp4l0-21swapper/322:30:313
134491530,4ptp4l0-21swapper/022:40:490
134491530,4ptp4l0-21swapper/019:46:470
134491530,3ptp4l0-21swapper/222:54:142
134491530,11ptp4l0-21swapper/320:46:183
1165999537,14cyclictest2318-21gnome-shell19:45:252
1165999532,11cyclictest24507-21systemctl19:35:242
1165999531,10cyclictest0-21swapper/220:45:212
134491520,4ptp4l0-21swapper/323:51:053
134491520,4ptp4l0-21swapper/322:22:553
134491520,4ptp4l0-21swapper/319:36:253
134491520,4ptp4l0-21swapper/121:18:081
134491520,3ptp4l0-21swapper/022:53:520
134491520,2ptp4l22921-21ls21:50:271
1165999524,16cyclictest2616-21cat23:25:262
1165999522,9cyclictest934-21date22:15:002
1165999521,11cyclictest4928-21switchtime23:30:272
134491510,4ptp4l0-21swapper/320:27:053
134491510,4ptp4l0-21swapper/123:12:191
134491510,3ptp4l0-21swapper/121:23:061
134491510,3ptp4l0-21swapper/100:30:431
134491510,12ptp4l0-21swapper/000:10:170
134491510,11ptp4l0-21swapper/022:46:300
1165999512,9cyclictest22079-21cpuspeed23:00:132
1165999510,10cyclictest0-21swapper/219:40:232
134491500,4ptp4l0-21swapper/123:51:451
134491500,4ptp4l0-21swapper/020:18:560
134491500,3ptp4l0-21swapper/122:45:131
134491500,3ptp4l0-21swapper/000:25:380
1165999500,9cyclictest0-21swapper/221:40:232
134491490,4ptp4l0-21swapper/321:41:293
134491490,4ptp4l0-21swapper/300:20:253
134491490,3ptp4l3370-21/usr/sbin/munin22:20:211
134491490,3ptp4l0-21swapper/123:55:131
1166099496,7cyclictest41-21ksoftirqd/323:00:213
1165999495,7cyclictest11435-21meminfo22:35:192
134491480,4ptp4l0-21swapper/020:47:350
134491480,4ptp4l0-21swapper/019:43:230
134491480,3ptp4l0-21swapper/022:08:410
1165999488,6cyclictest0-21swapper/221:05:152
134491470,4ptp4l0-21swapper/021:05:370
134491470,3ptp4l0-21swapper/219:51:092
134491470,3ptp4l0-21swapper/120:42:241
11660994741,3cyclictest41-21ksoftirqd/321:55:003
1165999471,10cyclictest0-21swapper/223:50:282
1165799477,4cyclictest9-21ksoftirqd/000:00:010
11657994711,8cyclictest9-21ksoftirqd/022:00:000
134491460,5ptp4l4939-21apt-get20:05:132
134491460,4ptp4l0-21swapper/319:50:113
1165999464,7cyclictest28122-21latency00:20:222
1165999464,7cyclictest22691-21ls20:40:252
1165799461,3cyclictest9-21ksoftirqd/023:34:490
134491450,9ptp4l0-21swapper/023:12:380
134491450,4ptp4l0-21swapper/100:18:451
134491450,3ptp4l0-21swapper/322:45:143
134491450,3ptp4l0-21swapper/122:17:411
11657994511,7cyclictest9-21ksoftirqd/021:20:000
134491440,9ptp4l0-21swapper/220:02:102
134491440,9ptp4l0-21swapper/021:37:280
134491440,9ptp4l0-21swapper/020:56:280
134491440,4ptp4l7618-21apt-get21:20:132
134491440,4ptp4l0-21swapper/120:34:511
134491440,4ptp4l0-21swapper/120:21:121
134491440,4ptp4l0-21swapper/023:49:220
134491440,3ptp4l0-21swapper/119:54:171
11660994439,3cyclictest41-21ksoftirqd/322:00:013
1165999445,8cyclictest2347-21ps00:35:172
1165999441,9cyclictest15936-21grep21:35:262
1165799441,4cyclictest9-21ksoftirqd/019:10:230
134491430,9ptp4l0-21swapper/223:09:372
134491430,9ptp4l0-21swapper/220:23:472
134491430,9ptp4l0-21swapper/019:18:520
134491430,4ptp4l17403-21apt-get22:50:133
134491430,4ptp4l0-21swapper/320:59:003
134491430,4ptp4l0-21swapper/320:53:223
134491430,4ptp4l0-21swapper/319:59:293
134491430,3ptp4l0-21swapper/122:09:231
134491430,2ptp4l121rcu_preempt23:20:180
1166099436,7cyclictest41-21ksoftirqd/300:40:003
11660994330,10cyclictest41-21ksoftirqd/322:55:273
1165999436,8cyclictest1430-21hddtemp_smartct22:15:162
1165999434,8cyclictest25217-21ls21:55:262
1165999434,11cyclictest134491ptp4l00:15:192
134491420,9ptp4l0-21swapper/222:26:442
134491420,5ptp4l20071-21ntp_states20:35:223
134491420,5ptp4l1192-21iostat21:05:181
134491420,5ptp4l11687-21apt-get19:10:113
134491420,5ptp4l0-21swapper/022:10:180
134491420,4ptp4l24460-21apt-get00:15:040
134491420,3ptp4l0-21swapper/323:36:273
134491420,3ptp4l0-21swapper/122:35:021
134491420,10ptp4l0-21swapper/320:40:383
134491420,10ptp4l0-21swapper/200:30:092
11660994237,3cyclictest41-21ksoftirqd/300:10:003
1165999425,8cyclictest4959-21ls22:20:342
1165999422,7cyclictest29330-21perl23:15:192
11657994237,3cyclictest9-21ksoftirqd/022:05:000
11657994213,3cyclictest9-21ksoftirqd/020:55:000
134491410,5ptp4l0-21swapper/219:10:102
134491410,5ptp4l0-21swapper/000:00:120
134491410,4ptp4l12216-21apt-get21:30:121
134491410,4ptp4l0-21swapper/321:20:123
134491410,4ptp4l0-21swapper/023:26:310
134491410,4ptp4l0-21swapper/021:20:170
134491410,4ptp4l0-21swapper/020:10:410
134491410,3ptp4l0-21swapper/320:19:253
134491410,3ptp4l0-21swapper/320:11:363
134491410,3ptp4l0-21swapper/123:23:581
11660994136,3cyclictest41-21ksoftirqd/322:20:013
11660994136,3cyclictest41-21ksoftirqd/321:15:003
11660994131,9cyclictest41-21ksoftirqd/321:28:413
11660994130,9cyclictest41-21ksoftirqd/300:15:233
1165999413,8cyclictest26605-21apt-get23:10:112
11657994137,2cyclictest9-21ksoftirqd/022:20:000
11657994136,3cyclictest9-21ksoftirqd/023:40:010
11657994135,3cyclictest9-21ksoftirqd/020:30:000
134491400,5ptp4l29325-21meminfo20:55:201
134491400,5ptp4l10834-21cut22:35:163
134491400,5ptp4l0-21swapper/322:40:103
134491400,5ptp4l0-21swapper/321:35:233
134491400,5ptp4l0-21swapper/121:35:171
134491400,5ptp4l0-21swapper/121:10:081
134491400,5ptp4l0-21swapper/120:15:181
134491400,5ptp4l0-21swapper/021:45:100
134491400,5ptp4l0-21swapper/019:51:560
134491400,4ptp4l6409-21ntp_states21:15:242
134491400,4ptp4l5502-21iostat20:05:180
134491400,4ptp4l31679-21iostat_ios22:10:191
134491400,4ptp4l24881-21iostat_ios23:05:173
134491400,4ptp4l20648-21memory22:55:210
134491400,4ptp4l20239-21ntp_states21:45:231
134491400,4ptp4l17780-21memory21:40:210
134491400,4ptp4l12806-21apt-get22:40:102
134491400,4ptp4l0-21swapper/320:20:273
134491400,4ptp4l0-21swapper/220:35:122
134491400,4ptp4l0-21swapper/123:35:241
134491400,4ptp4l0-21swapper/122:00:091
134491400,4ptp4l0-21swapper/120:05:131
134491400,4ptp4l0-21swapper/023:01:170
134491400,4ptp4l0-21swapper/022:38:080
134491400,4ptp4l0-21swapper/022:25:370
134491400,4ptp4l0-21swapper/022:20:460
134491400,4ptp4l0-21swapper/019:36:170
134491400,4ptp4l0-21swapper/019:31:570
134491400,4ptp4l0-21swapper/019:27:120
134491400,3ptp4l3585-21memory20:00:190
134491400,3ptp4l28008-21df19:45:141
134491400,3ptp4l2576-21python23:25:251
134491400,3ptp4l0-21swapper/300:10:143
134491400,2ptp4l21437-21ls00:05:310
1166099405,3cyclictest41-21ksoftirqd/319:25:283
11660994035,3cyclictest41-21ksoftirqd/323:49:593
11660994035,3cyclictest41-21ksoftirqd/321:30:283
11660994035,3cyclictest41-21ksoftirqd/320:10:003
11660994035,3cyclictest41-21ksoftirqd/300:25:193
134491390,5ptp4l4887-21cat20:05:001
134491390,5ptp4l17974-21iostat_ios22:50:191
134491390,5ptp4l0-21swapper/320:01:593
134491390,5ptp4l0-21swapper/023:07:590
134491390,4ptp4l29599-21irqstats22:05:193
134491390,4ptp4l26553-21diskstats22:00:142
134491390,4ptp4l23994-21hddtemp_smartct20:45:141
134491390,4ptp4l0-21swapper/322:10:213
134491390,4ptp4l0-21swapper/322:00:033
134491390,4ptp4l0-21swapper/319:22:593
134491390,4ptp4l0-21swapper/300:32:593
134491390,4ptp4l0-21swapper/220:30:272
134491390,4ptp4l0-21swapper/123:40:171
134491390,4ptp4l0-21swapper/122:30:211
134491390,4ptp4l0-21swapper/120:30:001
134491390,4ptp4l0-21swapper/119:57:151
134491390,4ptp4l0-21swapper/100:25:151
134491390,4ptp4l0-21swapper/100:05:211
134491390,4ptp4l0-21swapper/023:40:260
134491390,4ptp4l0-21swapper/023:19:330
134491390,4ptp4l0-21swapper/022:30:170
134491390,4ptp4l0-21swapper/021:27:370
134491390,4ptp4l0-21swapper/020:42:030
134491390,4ptp4l0-21swapper/020:39:110
134491390,4ptp4l0-21swapper/019:56:170
134491390,4ptp4l0-21swapper/019:20:330
134491390,4ptp4l0-21swapper/000:35:240
134491390,4ptp4l0-21swapper/000:20:120
134491390,3ptp4l5677-21apt-get22:25:123
134491390,3ptp4l31282-21apt-get23:20:122
134491390,3ptp4l30690-21apt-get21:00:111
134491390,3ptp4l28913-21ntp_states19:45:233
134491390,3ptp4l17087-21apt-get00:00:033
134491390,3ptp4l0-21swapper/123:06:581
134491390,3ptp4l0-21swapper/021:01:500
134491390,2ptp4l13845-21strings22:40:201
11660993934,3cyclictest41-21ksoftirqd/323:11:113
11660993934,3cyclictest41-21ksoftirqd/321:19:593
11660993934,3cyclictest41-21ksoftirqd/319:35:003
11660993934,3cyclictest41-21ksoftirqd/300:00:003
1165799393,2cyclictest121rcu_preempt21:50:160
11657993923,5cyclictest9-21ksoftirqd/020:30:130
46198380,4rtkit-daemon0-21swapper/119:40:121
134491380,4ptp4l0-21swapper/323:29:193
134491380,4ptp4l0-21swapper/323:20:193
134491380,4ptp4l0-21swapper/323:15:223
134491380,4ptp4l0-21swapper/321:49:393
134491380,4ptp4l0-21swapper/321:05:233
134491380,4ptp4l0-21swapper/320:30:003
134491380,4ptp4l0-21swapper/319:19:433
134491380,4ptp4l0-21swapper/220:25:432
134491380,4ptp4l0-21swapper/219:15:122
134491380,4ptp4l0-21swapper/122:25:431
134491380,4ptp4l0-21swapper/119:35:221
134491380,4ptp4l0-21swapper/100:35:151
134491380,4ptp4l0-21swapper/100:00:171
134491380,4ptp4l0-21swapper/021:30:430
134491380,4ptp4l0-21swapper/021:10:230
134491380,3ptp4l0-21swapper/122:55:211
11660993833,3cyclictest41-21ksoftirqd/323:40:243
11657993833,3cyclictest9-21ksoftirqd/023:50:280
134491370,4ptp4l0-21swapper/120:11:211
134491370,4ptp4l0-21swapper/119:34:281
134491370,4ptp4l0-21swapper/119:17:081
134491370,4ptp4l0-21swapper/100:23:291
134491370,4ptp4l0-21swapper/100:10:051
134491370,3ptp4l0-21swapper/123:45:231
134491370,3ptp4l0-21swapper/121:55:011
134491370,3ptp4l0-21swapper/121:40:191
134491370,3ptp4l0-21swapper/119:28:151
134491370,3ptp4l0-21swapper/119:20:351
134491370,2ptp4l0-21swapper/120:50:221
134491360,3ptp4l0-21swapper/120:35:151
11658993630,3cyclictest25-21ksoftirqd/119:10:121
46198290,5rtkit-daemon0-21swapper/019:09:100
98392102,4sleep10-21swapper/119:05:171
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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