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2026-08-18 - 07:48
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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 Tue Aug 18, 2026 00:45:42)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
10852750,5sleep31088-21latency00:00:183
155302650,5sleep015427-21latency_hist21:05:010
134491630,25ptp4l17724-21memory00:35:221
27101996029,5cyclictest9-21ksoftirqd/019:40:160
27101996029,4cyclictest9-21ksoftirqd/019:30:210
27101996026,4cyclictest9-21ksoftirqd/019:20:000
27101995928,4cyclictest9-21ksoftirqd/019:55:220
134491590,4ptp4l0-21swapper/223:30:562
134491580,4ptp4l0-21swapper/100:22:301
27101995727,3cyclictest9-21ksoftirqd/023:55:230
27101995727,3cyclictest9-21ksoftirqd/023:40:240
134491570,5ptp4l0-21swapper/322:35:183
134491570,5ptp4l0-21swapper/020:40:100
134491570,4ptp4l0-21swapper/200:05:232
134491570,4ptp4l0-21swapper/120:05:211
134491570,4ptp4l0-21swapper/100:00:141
27101995628,4cyclictest9-21ksoftirqd/021:40:010
27101995622,4cyclictest9-21ksoftirqd/019:54:210
27101995622,4cyclictest9-21ksoftirqd/019:54:210
27101995622,4cyclictest9-21ksoftirqd/000:14:210
134491560,4ptp4l0-21swapper/023:22:000
134491560,3ptp4l0-21swapper/023:25:270
27101995524,4cyclictest9-21ksoftirqd/020:55:030
134491550,5ptp4l0-21swapper/223:40:272
134491550,3ptp4l0-21swapper/122:16:511
134491550,3ptp4l0-21swapper/021:25:040
134491550,3ptp4l0-21swapper/021:25:040
27101995427,7cyclictest9-21ksoftirqd/020:20:070
27101995425,4cyclictest9-21ksoftirqd/023:52:340
27101995424,4cyclictest9-21ksoftirqd/022:56:330
27101995422,4cyclictest9-21ksoftirqd/022:21:560
27101995419,4cyclictest9-21ksoftirqd/021:50:040
134491540,4ptp4l0-21swapper/122:04:151
134491540,4ptp4l0-21swapper/121:54:191
65012530,4sleep36503-21cstates19:35:133
27101995324,4cyclictest9-21ksoftirqd/022:00:260
27101995323,4cyclictest9-21ksoftirqd/021:40:310
27101995318,3cyclictest9-21ksoftirqd/022:15:170
27101995315,4cyclictest9-21ksoftirqd/022:40:250
247782530,2sleep32710499cyclictest23:40:253
134491530,5ptp4l0-21swapper/320:07:493
134491530,4ptp4l0-21swapper/023:48:380
134491530,3ptp4l0-21swapper/023:16:150
27101995226,3cyclictest9-21ksoftirqd/020:45:270
27101995224,7cyclictest9-21ksoftirqd/023:14:470
27101995224,7cyclictest9-21ksoftirqd/020:34:160
27101995223,3cyclictest9-21ksoftirqd/020:39:130
27101995126,7cyclictest9-21ksoftirqd/022:28:250
27101995125,7cyclictest9-21ksoftirqd/020:04:150
27101995124,6cyclictest9-21ksoftirqd/020:29:410
27101995124,6cyclictest9-21ksoftirqd/020:19:030
27101995120,4cyclictest9-21ksoftirqd/021:57:250
27101995120,4cyclictest9-21ksoftirqd/021:57:250
27101995117,3cyclictest9-21ksoftirqd/023:05:480
134491510,4ptp4l0-21swapper/123:25:511
134491510,3ptp4l0-21swapper/021:16:240
134491510,3ptp4l0-21swapper/019:47:270
27101995026,7cyclictest9-21ksoftirqd/000:17:250
27101995022,3cyclictest9-21ksoftirqd/021:24:500
27101995022,3cyclictest9-21ksoftirqd/019:25:000
27101995022,3cyclictest9-21ksoftirqd/019:25:000
27101995017,5cyclictest9-21ksoftirqd/000:08:390
134491500,4ptp4l0-21swapper/122:31:091
134491500,4ptp4l0-21swapper/100:30:201
134491500,4ptp4l0-21swapper/023:36:040
27101994924,4cyclictest9-21ksoftirqd/019:36:490
27101994923,6cyclictest9-21ksoftirqd/021:13:030
27101994917,3cyclictest9-21ksoftirqd/020:54:180
27101994915,5cyclictest9-21ksoftirqd/000:30:150
134491490,6ptp4l0-21swapper/319:57:473
134491490,4ptp4l0-21swapper/323:03:163
134491490,4ptp4l0-21swapper/223:28:252
134491490,4ptp4l0-21swapper/123:57:591
134491490,4ptp4l0-21swapper/121:33:011
134491490,4ptp4l0-21swapper/120:20:591
134491490,4ptp4l0-21swapper/000:22:280
134491490,17ptp4l27100-21cyclictest19:10:173
27101994826,7cyclictest9-21ksoftirqd/022:13:450
27101994819,4cyclictest9-21ksoftirqd/019:25:140
134491480,5ptp4l0-21swapper/300:26:183
134491480,4ptp4l0-21swapper/222:45:512
134491480,4ptp4l0-21swapper/122:52:421
134491480,4ptp4l0-21swapper/022:07:570
134491480,3ptp4l0-21swapper/320:56:303
134491480,3ptp4l0-21swapper/223:55:122
27101994730,3cyclictest9-21ksoftirqd/020:10:210
27101994720,7cyclictest9-21ksoftirqd/023:30:130
134491470,4ptp4l0-21swapper/121:25:471
134491470,4ptp4l0-21swapper/121:25:471
134491470,3ptp4l0-21swapper/123:20:221
4172460,3sleep20-21swapper/222:50:182
2710199464,3cyclictest121rcu_preempt22:32:430
27101994619,6cyclictest9-21ksoftirqd/022:40:010
134491460,8ptp4l0-21swapper/319:05:163
134491460,7ptp4l0-21swapper/219:05:152
134491460,4ptp4l0-21swapper/320:50:473
134491460,4ptp4l0-21swapper/023:04:420
134491460,3ptp4l0-21swapper/221:17:442
134491460,3ptp4l0-21swapper/220:24:442
134491460,3ptp4l0-21swapper/123:15:151
134491460,3ptp4l0-21swapper/100:17:291
2710199454,3cyclictest121rcu_preempt21:09:190
2710199452,2cyclictest121rcu_preempt00:26:570
27101994510,5cyclictest9-21ksoftirqd/019:10:270
134491450,9ptp4l0-21swapper/221:48:382
134491450,6ptp4l27626-21apt-get22:40:132
134491450,5ptp4l0-21swapper/221:55:152
134491450,5ptp4l0-21swapper/221:55:152
134491450,3ptp4l0-21swapper/123:51:101
27101994438,3cyclictest9-21ksoftirqd/000:05:010
2710199442,2cyclictest9-21ksoftirqd/020:09:530
134491440,8ptp4l0-21swapper/200:01:112
134491440,3ptp4l0-21swapper/219:10:322
134491440,3ptp4l0-21swapper/119:49:141
134491440,10ptp4l0-21swapper/123:10:061
2710199433,3cyclictest121rcu_preempt21:49:230
2710199431,2cyclictest9-21ksoftirqd/000:36:550
134491430,9ptp4l0-21swapper/222:06:412
134491430,9ptp4l0-21swapper/221:20:462
134491430,9ptp4l0-21swapper/219:31:342
134491430,5ptp4l2598-21apt-get22:55:121
134491430,5ptp4l0-21swapper/320:10:143
134491430,4ptp4l0-21swapper/220:41:462
134491430,4ptp4l0-21swapper/120:42:281
134491430,3ptp4l17822-21apt-get20:00:132
134491430,3ptp4l0-21swapper/200:32:422
134491430,3ptp4l0-21swapper/123:09:081
134491430,3ptp4l0-21swapper/119:37:141
134491430,10ptp4l0-21swapper/223:16:402
27102994237,3cyclictest25-21ksoftirqd/119:30:001
27101994217,6cyclictest9-21ksoftirqd/021:35:010
2710199421,3cyclictest32005-21taskset22:47:470
134491420,9ptp4l0-21swapper/222:25:372
134491420,9ptp4l0-21swapper/220:48:342
134491420,9ptp4l0-21swapper/200:25:492
134491420,9ptp4l0-21swapper/123:35:171
134491420,9ptp4l0-21swapper/119:20:311
134491420,9ptp4l0-21swapper/119:20:311
134491420,8ptp4l0-21swapper/221:12:552
134491420,8ptp4l0-21swapper/220:53:272
134491420,5ptp4l7437-21awk19:35:232
134491420,4ptp4l30597-21irqstats21:35:211
134491420,4ptp4l15822-21apt-get22:15:112
134491420,4ptp4l15047-21users21:00:311
134491420,4ptp4l0-21swapper/321:11:153
134491420,4ptp4l0-21swapper/319:30:233
134491420,4ptp4l0-21swapper/223:36:272
134491420,4ptp4l0-21swapper/121:18:251
134491420,3ptp4l649-21ls21:40:232
134491420,10ptp4l0-21swapper/200:13:552
27103994135,3cyclictest32328-21irqrtprio19:20:182
27103994135,3cyclictest32328-21irqrtprio19:20:182
134491410,9ptp4l0-21swapper/222:03:062
134491410,9ptp4l0-21swapper/123:43:091
134491410,8ptp4l5190-21tr00:10:131
134491410,8ptp4l0-21swapper/223:04:522
134491410,8ptp4l0-21swapper/219:41:322
134491410,5ptp4l28968-21python22:40:251
134491410,5ptp4l0-21swapper/319:15:283
134491410,5ptp4l0-21swapper/222:35:122
134491410,5ptp4l0-21swapper/221:07:132
134491410,5ptp4l0-21swapper/219:25:302
134491410,4ptp4l9184-21perl20:50:181
134491410,4ptp4l2977-21meminfo21:45:211
134491410,4ptp4l29687-21apt-get22:45:011
134491410,4ptp4l28802-21users19:10:291
134491410,4ptp4l25512-21df22:35:131
134491410,4ptp4l18665-21irqstats20:00:201
134491410,4ptp4l0-21swapper/321:20:133
134491410,4ptp4l0-21swapper/321:05:593
134491410,4ptp4l0-21swapper/320:40:283
134491410,4ptp4l0-21swapper/223:21:322
134491410,4ptp4l0-21swapper/122:25:221
134491410,3ptp4l26619-21ls23:45:191
134491410,3ptp4l22133-21ntp_states23:35:243
27104994034,3cyclictest41-21ksoftirqd/320:20:003
27103994034,4cyclictest33-21ksoftirqd/221:51:162
27102994035,3cyclictest16755-21ntp_kernel_err21:05:241
134491400,5ptp4l0-21swapper/323:26:393
134491400,4ptp4l7051-21hddtemp_smartct21:55:191
134491400,4ptp4l7051-21hddtemp_smartct21:55:191
134491400,4ptp4l2984-21hddtemp_smartct00:05:181
134491400,4ptp4l23584-21meminfo21:20:211
134491400,4ptp4l18452-21df_inode22:20:161
134491400,4ptp4l18386-21perl21:10:131
134491400,4ptp4l12346-21ntp_states22:05:231
134491400,4ptp4l0-21swapper/319:54:053
134491400,4ptp4l0-21swapper/319:54:053
134491400,4ptp4l0-21swapper/222:20:272
134491400,4ptp4l0-21swapper/222:11:222
134491400,4ptp4l0-21swapper/221:36:272
134491400,4ptp4l0-21swapper/221:26:542
134491400,4ptp4l0-21swapper/221:26:542
134491400,4ptp4l0-21swapper/220:30:522
134491400,4ptp4l0-21swapper/219:58:372
134491400,4ptp4l0-21swapper/219:51:192
134491400,4ptp4l0-21swapper/219:51:192
134491400,4ptp4l0-21swapper/200:20:152
134491400,4ptp4l0-21swapper/120:25:291
134491400,4ptp4l0-21swapper/119:50:141
134491400,4ptp4l0-21swapper/119:50:131
134491400,4ptp4l0-21swapper/022:51:090
134491400,3ptp4l9669-21apt-get00:20:143
134491400,3ptp4l2326-21llvmpipe-300:25:591
134491400,3ptp4l14367-21irqstats22:10:171
134491400,3ptp4l0-21swapper/120:45:171
134491390,6ptp4l0-21swapper/123:30:141
134491390,5ptp4l0-21swapper/323:13:413
134491390,5ptp4l0-21swapper/119:34:391
134491390,4ptp4l5488-21iostat_ios23:00:191
134491390,4ptp4l5035-21/usr/sbin/munin00:10:113
134491390,4ptp4l11732-21kworker/3:200:30:123
134491390,4ptp4l0-21swapper/323:50:233
134491390,4ptp4l0-21swapper/323:15:133
134491390,4ptp4l0-21swapper/323:05:153
134491390,4ptp4l0-21swapper/322:46:053
134491390,4ptp4l0-21swapper/322:34:593
134491390,4ptp4l0-21swapper/321:55:313
134491390,4ptp4l0-21swapper/321:55:313
134491390,4ptp4l0-21swapper/321:45:383
134491390,4ptp4l0-21swapper/321:25:323
134491390,4ptp4l0-21swapper/321:25:323
134491390,4ptp4l0-21swapper/321:19:113
134491390,4ptp4l0-21swapper/320:20:063
134491390,4ptp4l0-21swapper/320:00:423
134491390,4ptp4l0-21swapper/319:47:333
134491390,4ptp4l0-21swapper/319:26:333
134491390,4ptp4l0-21swapper/300:35:163
134491390,4ptp4l0-21swapper/223:51:552
134491390,4ptp4l0-21swapper/223:45:182
134491390,4ptp4l0-21swapper/220:56:062
134491390,4ptp4l0-21swapper/220:28:532
134491390,4ptp4l0-21swapper/220:07:312
134491390,4ptp4l0-21swapper/219:15:572
134491390,4ptp4l0-21swapper/200:35:402
134491390,4ptp4l0-21swapper/200:17:512
134491390,4ptp4l0-21swapper/121:43:411
134491390,4ptp4l0-21swapper/120:35:161
134491390,4ptp4l0-21swapper/119:40:031
134491390,4ptp4l0-21swapper/119:16:421
134491390,4ptp4l0-21swapper/019:09:480
134491390,3ptp4l24352-21users20:10:301
134491390,3ptp4l0-21swapper/223:12:372
134491390,3ptp4l0-21swapper/120:55:171
134491390,15ptp4l0-21swapper/323:30:553
134491380,5ptp4l0-21swapper/322:40:333
134491380,4ptp4l0-21swapper/323:55:033
134491380,4ptp4l0-21swapper/323:23:133
134491380,4ptp4l0-21swapper/322:52:133
134491380,4ptp4l0-21swapper/322:28:353
134491380,4ptp4l0-21swapper/322:18:013
134491380,4ptp4l0-21swapper/321:38:453
134491380,4ptp4l0-21swapper/320:45:253
134491380,4ptp4l0-21swapper/320:30:173
134491380,4ptp4l0-21swapper/320:25:153
134491380,4ptp4l0-21swapper/319:40:273
134491380,4ptp4l0-21swapper/300:18:073
134491380,4ptp4l0-21swapper/300:06:303
134491380,4ptp4l0-21swapper/222:59:432
134491380,4ptp4l0-21swapper/221:30:042
134491380,4ptp4l0-21swapper/220:35:382
134491380,4ptp4l0-21swapper/220:15:082
134491380,4ptp4l0-21swapper/220:10:042
134491380,4ptp4l0-21swapper/219:46:052
134491380,4ptp4l0-21swapper/120:34:451
134491380,3ptp4l25824-21cpuspeed_turbos23:45:133
134491380,3ptp4l0-21swapper/223:06:402
134491380,3ptp4l0-21swapper/222:32:032
134491380,3ptp4l0-21swapper/221:00:272
134491380,3ptp4l0-21swapper/120:17:431
134491380,2ptp4l16070-21iostat19:55:191
134491370,4ptp4l0-21swapper/322:59:353
134491370,4ptp4l0-21swapper/322:24:103
134491370,4ptp4l0-21swapper/322:09:173
134491370,4ptp4l0-21swapper/321:52:353
134491370,4ptp4l0-21swapper/321:01:133
134491370,4ptp4l0-21swapper/119:09:471
134491370,3ptp4l0-21swapper/322:11:143
134491370,3ptp4l0-21swapper/321:30:253
134491370,3ptp4l0-21swapper/320:38:283
134491360,4ptp4l0-21swapper/321:40:233
134491360,4ptp4l0-21swapper/319:23:253
134491360,4ptp4l0-21swapper/319:23:253
27104992620,4cyclictest41-21ksoftirqd/322:02:213
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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