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2026-05-20 - 11:28
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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 rackdslot2.osadl.org (updated Wed May 20, 2026 00:45:45)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
31652209174,23sleep20-21swapper/219:09:142
139591207173,22phc2sys0-21swapper/319:08:033
30812204172,21sleep10-21swapper/119:08:071
10172202169,22sleep00-21swapper/019:05:100
1858321780,6sleep3352299cyclictest20:45:293
139291670,1ptp4l401ktimersoftd/300:01:053
30062660,4sleep23007-21irqrtprio20:15:202
282292650,4sleep128234-21irqrtprio00:30:201
3519996110,18cyclictest23924-21/usr/sbin/munin19:50:240
3519996012,11cyclictest12658-21irqstats22:50:200
3519996011,19cyclictest23355-21if_err_enp4s022:05:190
14792600,3sleep31484-21unixbench_multi22:25:263
84912590,2sleep00-21swapper/020:25:250
3519995912,10cyclictest6029-21/usr/sbin/munin19:15:140
352099588,16cyclictest8587-21wc20:25:251
3519995713,11cyclictest6167-21/usr/sbin/munin20:20:280
320142570,2sleep10-21swapper/122:25:011
352099566,17cyclictest2124-21mailstats23:35:241
351999569,16cyclictest12946-21taskset21:45:020
139291560,1ptp4l401ktimersoftd/323:15:183
352099559,42cyclictest31229-21grep21:15:161
352099557,16cyclictest16462-21dpkg20:45:011
3519995510,11cyclictest27744-21sensors21:05:240
139291550,0ptp4l401ktimersoftd/321:30:553
352099548,17cyclictest5918-21dpkg19:15:121
352099547,16cyclictest28412-21dpkg23:25:111
3519995310,11cyclictest4722-21open_inodes19:10:260
3519995211,11cyclictest19676-21cut23:05:180
352099517,13cyclictest15822-21hddtemp_smartct00:05:221
352099517,12cyclictest18049-21df21:55:131
352099515,16cyclictest19426-21taskset23:05:151
351999519,12cyclictest2728-21interrupts20:15:190
3519995111,11cyclictest22778-21awk23:10:250
3519995010,10cyclictest30000-21df20:05:140
352099498,12cyclictest21718-21ssh19:45:251
352099498,12cyclictest13262-21df21:45:171
352099497,12cyclictest20943-21users20:50:271
351999497,16cyclictest0-21swapper/020:49:560
3519994912,10cyclictest6798-21ps23:45:240
352099487,11cyclictest31025-21ptp4l-jitter20:05:251
3522994729,15cyclictest41-21ksoftirqd/323:38:583
3522994525,4cyclictest41-21ksoftirqd/322:07:583
352099458,12cyclictest3161-21irqstats22:30:181
352099456,7cyclictest12461-21iostat_ios20:35:191
352099456,11cyclictest24083-21ssh19:50:271
352099455,7cyclictest4254-21apt-get20:20:011
3519994510,11cyclictest15728-21df_abs19:35:150
352099447,13cyclictest17484-21iostat20:45:191
351999449,12cyclictest3241-21cpuspeed23:40:120
139291440,34ptp4l0-21swapper/319:10:003
352099437,13cyclictest14750-21iostat_ios22:55:171
352099434,7cyclictest14328-21ps19:30:221
351999439,10cyclictest26043-21ls19:55:200
351999431,17cyclictest0-21swapper/020:38:570
352099427,12cyclictest11051-21hddtemp_smartct23:55:141
352099427,11cyclictest1560-21hddtemp_smartct21:20:161
352099426,13cyclictest6480-21irqstats23:45:201
352099426,13cyclictest10965-21df19:25:141
351999426,10cyclictest0-21swapper/022:10:230
139291420,0ptp4l401ktimersoftd/322:03:203
139291420,0ptp4l401ktimersoftd/320:00:223
3522994135,3cyclictest17510-21cron21:55:003
352099416,13cyclictest11621-21ls21:40:191
139291410,0ptp4l401ktimersoftd/323:20:203
139291410,0ptp4l401ktimersoftd/322:42:123
3521994035,3cyclictest1-21systemd00:21:222
352099404,11cyclictest13377-21ls22:50:281
351999409,11cyclictest1049-21tr20:10:260
351999409,10cyclictest21249-21missed_timers19:45:210
139291400,0ptp4l401ktimersoftd/319:30:013
135291400,1getstats0-21swapper/300:11:533
352099397,13cyclictest9875-21hddtemp_smartct22:45:161
352099397,11cyclictest16998-21hddtemp_smartct23:00:151
352099393,17cyclictest0-21swapper/121:51:021
351999399,11cyclictest10984-21timerwakeupswit22:45:250
351999398,11cyclictest28603-21processes20:00:220
3519993911,18cyclictest15842-21cat00:05:220
3519993910,12cyclictest23637-21/usr/sbin/munin23:15:250
139291390,0ptp4l401ktimersoftd/321:10:313
3522993832,4cyclictest41-21ksoftirqd/319:22:053
3522993832,4cyclictest41-21ksoftirqd/300:34:153
3521993832,4cyclictest33-21ksoftirqd/200:13:282
351999389,11cyclictest24253-21timerandwakeup00:20:280
3519993810,9cyclictest2974-21cut22:30:180
3522993732,3cyclictest41-21ksoftirqd/319:19:173
3522993731,4cyclictest41-21ksoftirqd/321:23:243
3522993731,4cyclictest41-21ksoftirqd/319:37:253
3521993731,4cyclictest33-21ksoftirqd/220:25:382
3521993731,4cyclictest33-21ksoftirqd/219:21:392
352099374,7cyclictest13224-21df00:00:151
351999379,17cyclictest32103-21latency_hist00:40:000
351999377,9cyclictest0-21swapper/022:20:180
3519993732,3cyclictest9-21ksoftirqd/021:57:110
3519993731,4cyclictest9-21ksoftirqd/022:01:570
3519993731,4cyclictest9-21ksoftirqd/021:40:110
3519993731,4cyclictest9-21ksoftirqd/020:58:260
135291370,1getstats0-21swapper/300:06:533
3522993631,3cyclictest41-21ksoftirqd/321:27:103
3522993630,4cyclictest41-21ksoftirqd/323:33:093
3522993630,4cyclictest41-21ksoftirqd/321:05:073
3522993630,4cyclictest41-21ksoftirqd/320:53:313
3522993630,4cyclictest41-21ksoftirqd/320:44:483
3522993630,4cyclictest41-21ksoftirqd/320:07:543
3522993630,4cyclictest41-21ksoftirqd/300:39:253
3521993630,4cyclictest33-21ksoftirqd/223:51:222
3521993630,4cyclictest33-21ksoftirqd/223:14:482
3521993630,4cyclictest33-21ksoftirqd/223:08:592
3521993630,4cyclictest33-21ksoftirqd/223:01:552
3521993630,4cyclictest33-21ksoftirqd/222:09:452
3521993630,4cyclictest33-21ksoftirqd/221:28:212
3521993630,4cyclictest33-21ksoftirqd/221:21:222
3521993630,4cyclictest33-21ksoftirqd/221:07:302
3521993630,4cyclictest33-21ksoftirqd/221:00:332
3521993630,4cyclictest33-21ksoftirqd/219:56:292
3520993630,4cyclictest25-21ksoftirqd/123:34:161
351999369,15cyclictest24012-21grep21:00:130
351999369,10cyclictest8202-21/usr/sbin/munin21:35:210
351999366,18cyclictest0-21swapper/021:20:160
3519993630,4cyclictest9-21ksoftirqd/022:16:010
3519993630,4cyclictest9-21ksoftirqd/020:31:420
3519993630,4cyclictest9-21ksoftirqd/000:34:120
3519993611,11cyclictest217-21systemd-journal23:51:170
3522993530,3cyclictest41-21ksoftirqd/321:45:143
3522993530,3cyclictest41-21ksoftirqd/321:01:573
3522993530,3cyclictest41-21ksoftirqd/320:32:423
3522993529,4cyclictest41-21ksoftirqd/323:47:183
3522993529,4cyclictest41-21ksoftirqd/323:01:163
3522993529,4cyclictest41-21ksoftirqd/322:46:133
3522993529,4cyclictest41-21ksoftirqd/322:13:303
3522993529,4cyclictest41-21ksoftirqd/321:42:343
3522993529,4cyclictest41-21ksoftirqd/320:16:163
3522993529,4cyclictest41-21ksoftirqd/320:12:233
3522993529,4cyclictest41-21ksoftirqd/319:56:313
3522993529,4cyclictest41-21ksoftirqd/319:51:023
3522993529,4cyclictest41-21ksoftirqd/319:45:353
3521993529,4cyclictest33-21ksoftirqd/223:20:372
3521993529,4cyclictest33-21ksoftirqd/220:47:172
3521993528,4cyclictest33-21ksoftirqd/200:35:062
352099357,12cyclictest23378-21iostat_ios22:05:191
3520993530,3cyclictest25-21ksoftirqd/121:33:091
3520993529,4cyclictest25-21ksoftirqd/123:53:451
3520993529,4cyclictest25-21ksoftirqd/123:44:511
3520993529,4cyclictest25-21ksoftirqd/120:14:221
3520993529,4cyclictest25-21ksoftirqd/119:12:161
351999359,9cyclictest31694-21irqstats23:30:180
351999359,10cyclictest11731-21phc2sys23:55:200
3519993530,3cyclictest9-21ksoftirqd/000:15:100
3519993529,4cyclictest9-21ksoftirqd/022:25:390
3519993529,4cyclictest9-21ksoftirqd/021:32:080
3519993529,4cyclictest9-21ksoftirqd/000:25:060
3519993510,7cyclictest1378-21iostat_ios23:35:180
3522993429,3cyclictest41-21ksoftirqd/322:53:043
3522993428,4cyclictest41-21ksoftirqd/322:23:503
3522993428,4cyclictest41-21ksoftirqd/321:36:443
3522993428,4cyclictest41-21ksoftirqd/319:40:543
3522993428,4cyclictest41-21ksoftirqd/300:22:403
3521993429,3cyclictest33-21ksoftirqd/222:20:392
3521993429,3cyclictest33-21ksoftirqd/221:33:192
3521993429,3cyclictest33-21ksoftirqd/219:47:582
3521993428,4cyclictest33-21ksoftirqd/223:41:232
3521993428,4cyclictest33-21ksoftirqd/222:36:092
3521993428,4cyclictest33-21ksoftirqd/222:32:082
3521993428,4cyclictest33-21ksoftirqd/219:52:322
3521993428,4cyclictest33-21ksoftirqd/200:32:192
3521993422,10cyclictest33-21ksoftirqd/223:35:112
352099349,14cyclictest26976-21grep21:05:191
352099346,15cyclictest27173-21latency_hist20:00:001
352099344,11cyclictest8032-21memory22:40:211
3520993429,3cyclictest25-21ksoftirqd/120:30:391
3520993428,4cyclictest25-21ksoftirqd/122:27:241
351999349,8cyclictest18877-21meminfo19:40:200
351999346,17cyclictest0-21swapper/021:15:220
3519993429,3cyclictest9-21ksoftirqd/023:22:070
3519993429,3cyclictest9-21ksoftirqd/019:20:090
3519993428,4cyclictest9-21ksoftirqd/022:39:000
3519993428,4cyclictest9-21ksoftirqd/019:29:240
3519993428,4cyclictest9-21ksoftirqd/000:03:070
3519993410,13cyclictest20983-21sshd20:50:450
139291340,0ptp4l401ktimersoftd/323:10:003
3522993328,3cyclictest41-21ksoftirqd/323:56:003
3522993328,3cyclictest41-21ksoftirqd/323:15:003
3522993328,3cyclictest41-21ksoftirqd/322:55:103
3522993328,3cyclictest41-21ksoftirqd/320:57:573
3522993327,4cyclictest41-21ksoftirqd/322:34:043
3521993328,3cyclictest33-21ksoftirqd/220:50:452
3521993327,4cyclictest33-21ksoftirqd/222:41:412
3521993327,4cyclictest33-21ksoftirqd/222:26:172
3521993327,4cyclictest33-21ksoftirqd/222:15:062
3521993327,4cyclictest33-21ksoftirqd/219:18:192
352099335,15cyclictest17930-21apt-get00:10:131
352099334,16cyclictest25456-21runrttasks23:16:081
352099333,7cyclictest8809-21hddtemp_smartct19:20:151
3520993328,3cyclictest25-21ksoftirqd/119:36:471
3520993327,4cyclictest25-21ksoftirqd/100:29:561
351999339,8cyclictest28697-21df23:25:140
351999339,7cyclictest29341-21iostat21:10:180
351999338,14cyclictest14201-21apt-get20:40:110
3519993327,4cyclictest9-21ksoftirqd/022:57:520
3519993327,4cyclictest9-21ksoftirqd/019:32:570
3519993310,8cyclictest16494-21dpkg23:00:100
3522993227,3cyclictest41-21ksoftirqd/323:52:003
3522993227,3cyclictest41-21ksoftirqd/321:56:583
3522993227,3cyclictest41-21ksoftirqd/321:17:333
3522993227,3cyclictest41-21ksoftirqd/320:38:493
3522993227,3cyclictest41-21ksoftirqd/319:31:573
3522993227,3cyclictest41-21ksoftirqd/300:29:513
3522993226,4cyclictest41-21ksoftirqd/323:28:283
3521993227,3cyclictest33-21ksoftirqd/223:27:152
3521993227,3cyclictest33-21ksoftirqd/223:16:382
3521993227,3cyclictest33-21ksoftirqd/222:55:332
3521993226,4cyclictest33-21ksoftirqd/221:35:032
3521993226,4cyclictest33-21ksoftirqd/220:12:352
352099325,15cyclictest2375-21df_abs20:15:141
3520993227,3cyclictest25-21ksoftirqd/122:36:041
3520993227,3cyclictest25-21ksoftirqd/122:13:161
3520993226,4cyclictest25-21ksoftirqd/121:10:161
352099322,18cyclictest0-21swapper/119:40:181
351999329,13cyclictest19972-21sshd00:14:070
3519993227,3cyclictest9-21ksoftirqd/021:50:170
3522993125,4cyclictest41-21ksoftirqd/320:25:443
3521993126,3cyclictest33-21ksoftirqd/223:56:122
3521993126,3cyclictest33-21ksoftirqd/222:11:002
3521993126,3cyclictest33-21ksoftirqd/221:15:002
3521993126,3cyclictest33-21ksoftirqd/219:10:152
3521993125,4cyclictest33-21ksoftirqd/220:58:202
3521993125,4cyclictest33-21ksoftirqd/200:09:592
3521993124,4cyclictest33-21ksoftirqd/220:05:582
352099316,16cyclictest3232-21latency_hist21:25:001
352099315,8cyclictest19880-21apt-get22:00:011
352099314,18cyclictest0-21swapper/120:00:141
352099314,15cyclictest26040-21apt-get23:20:121
3520993125,4cyclictest25-21ksoftirqd/122:17:101
3522993025,3cyclictest41-21ksoftirqd/320:20:413
3521993025,3cyclictest33-21ksoftirqd/222:54:152
3521993024,4cyclictest33-21ksoftirqd/223:48:532
3521993024,4cyclictest33-21ksoftirqd/220:21:302
3521993024,4cyclictest33-21ksoftirqd/219:38:092
352099304,16cyclictest0-21swapper/100:15:261
3520993025,3cyclictest25-21ksoftirqd/123:10:101
352099302,17cyclictest0-21swapper/121:00:141
352099302,17cyclictest0-21swapper/120:55:181
352099302,17cyclictest0-21swapper/100:35:191
351999307,7cyclictest0-21swapper/022:40:160
351999305,16cyclictest0-21swapper/021:25:140
3522992925,2cyclictest41-21ksoftirqd/300:16:593
3521992924,3cyclictest33-21ksoftirqd/221:52:552
3521992924,3cyclictest33-21ksoftirqd/220:36:142
3521992923,4cyclictest33-21ksoftirqd/223:32:402
3521992923,4cyclictest33-21ksoftirqd/221:40:562
3521992923,4cyclictest33-21ksoftirqd/219:27:012
3521992914,13cyclictest33-21ksoftirqd/220:00:342
352099292,16cyclictest0-21swapper/121:35:141
139291290,0ptp4l401ktimersoftd/322:17:143
3521992823,3cyclictest33-21ksoftirqd/219:42:342
3521992823,3cyclictest33-21ksoftirqd/200:29:362
3521992823,3cyclictest33-21ksoftirqd/200:19:142
3521992822,4cyclictest33-21ksoftirqd/222:04:322
3521992822,4cyclictest33-21ksoftirqd/221:58:442
3521992822,4cyclictest33-21ksoftirqd/219:33:582
3521992822,4cyclictest33-21ksoftirqd/200:03:492
3522992722,3cyclictest41-21ksoftirqd/322:38:343
3521992722,3cyclictest33-21ksoftirqd/220:40:082
3521992721,4cyclictest33-21ksoftirqd/220:34:082
3521992621,3cyclictest33-21ksoftirqd/222:47:142
139291260,0ptp4l401ktimersoftd/323:40:333
3521992520,3cyclictest33-21ksoftirqd/221:49:502
3520992217,3cyclictest25-21ksoftirqd/100:23:331
3521992115,4cyclictest33-21ksoftirqd/221:16:012
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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