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2026-08-22 - 11:15
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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 Sat Aug 22, 2026 00:45:36)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2103921800,6sleep21523299cyclictest23:55:272
884121550,3sleep31523399cyclictest20:05:173
59002700,4sleep35899-21needreboot22:15:223
1523299633,10cyclictest14717-21egrep23:45:122
1523299629,16cyclictest23901-21ntpq20:35:202
1523299627,13cyclictest0-21swapper/200:10:262
134491620,5ptp4l27191-21ntp_states23:00:220
1523299614,16cyclictest28188-21cat19:35:252
1523299614,15cyclictest21916-21cpuspeed00:00:132
134491610,4ptp4l0-21swapper/120:55:131
134491600,4ptp4l0-21swapper/019:15:040
1523299596,6cyclictest0-21swapper/223:50:192
1523299596,10cyclictest25992-21cat23:00:002
1523299592,15cyclictest11745-21latency_hist22:30:002
1523299592,11cyclictest30428-21latency_hist23:10:002
134491590,3ptp4l0-21swapper/100:15:141
134491580,4ptp4l26959-21grep19:35:120
134491580,17ptp4l0-21swapper/122:55:111
134491580,16ptp4l0-21swapper/023:05:270
1523299563,9cyclictest1301-21snmpd23:40:202
134491560,4ptp4l0-21swapper/219:53:132
134491560,4ptp4l0-21swapper/021:28:290
134491560,3ptp4l0-21swapper/123:46:351
134491550,4ptp4l0-21swapper/121:46:431
134491550,3ptp4l3315-21ntp_states21:00:220
134491550,3ptp4l27924-21find00:10:250
134491550,3ptp4l0-21swapper/219:18:352
134491550,3ptp4l0-21swapper/119:56:591
134491550,3ptp4l0-21swapper/021:39:040
134491550,3ptp4l0-21swapper/019:45:130
314772540,5sleep20-21swapper/200:20:142
1523299544,16cyclictest30520-21df22:00:142
1523299544,11cyclictest9053-21cat20:05:192
134491540,4ptp4l0-21swapper/122:11:301
134491540,4ptp4l0-21swapper/121:05:321
134491540,4ptp4l0-21swapper/120:44:441
134491540,4ptp4l0-21swapper/023:45:150
134491540,3ptp4l0-21swapper/122:15:141
134491540,3ptp4l0-21swapper/023:27:540
134491540,3ptp4l0-21swapper/020:20:310
134491530,4ptp4l0-21swapper/322:56:273
134491530,4ptp4l0-21swapper/123:52:071
134491530,4ptp4l0-21swapper/123:09:231
134491530,4ptp4l0-21swapper/100:23:511
134491530,4ptp4l0-21swapper/020:28:010
134491530,3ptp4l0-21swapper/123:55:161
134491530,3ptp4l0-21swapper/020:55:240
1523299523,18cyclictest20341-21sed20:30:002
134491520,4ptp4l0-21swapper/120:35:491
134491520,3ptp4l0-21swapper/121:53:271
134491510,4ptp4l0-21swapper/322:10:103
134491510,4ptp4l0-21swapper/321:58:133
134491510,4ptp4l0-21swapper/119:32:231
134491510,4ptp4l0-21swapper/100:05:401
134491510,3ptp4l0-21swapper/100:37:291
134491510,3ptp4l0-21swapper/100:33:041
1523299507,5cyclictest0-21swapper/220:15:142
134491500,4ptp4l0-21swapper/120:30:421
134491500,3ptp4l0-21swapper/000:34:510
128572500,4sleep10-21swapper/123:40:171
1523299498,7cyclictest0-21swapper/220:10:222
1523299494,16cyclictest12067-21cat22:30:122
1523299494,10cyclictest22223-21apt-get19:25:092
134491490,4ptp4l0-21swapper/122:39:311
134491490,4ptp4l0-21swapper/022:22:160
134491490,3ptp4l0-21swapper/323:17:073
134491490,3ptp4l0-21swapper/221:25:082
1523299482,2cyclictest0-21swapper/221:30:282
134491480,4ptp4l0-21swapper/023:18:270
134491480,4ptp4l0-21swapper/020:31:550
134491480,4ptp4l0-21swapper/000:15:570
134491480,3ptp4l0-21swapper/319:20:273
134491480,3ptp4l0-21swapper/119:25:551
134491480,3ptp4l0-21swapper/020:11:390
134491470,7ptp4l14465-21ls19:05:302
134491470,3ptp4l0-21swapper/123:10:371
134491470,3ptp4l0-21swapper/120:29:401
134491470,3ptp4l0-21swapper/000:08:060
1523299466,6cyclictest0-21swapper/221:55:252
1523299463,10cyclictest1685-21ntp_states23:15:232
134491460,5ptp4l0-21swapper/319:08:183
134491460,4ptp4l26079-21apt-get23:00:121
134491460,4ptp4l0-21swapper/023:35:120
134491460,4ptp4l0-21swapper/021:56:530
134491460,3ptp4l11147-21dump-pmu-power21:20:002
134491460,3ptp4l0-21swapper/123:16:041
134491460,3ptp4l0-21swapper/122:20:541
134491460,3ptp4l0-21swapper/020:45:280
1523299458,6cyclictest0-21swapper/221:05:152
1523299457,6cyclictest0-21swapper/220:50:212
1523299457,6cyclictest0-21swapper/219:20:272
1523299456,10cyclictest27216-21awk23:00:222
1523299454,8cyclictest14333-21cpu22:35:132
134491450,5ptp4l0-21swapper/019:40:040
134491450,4ptp4l32008-21apt-get20:55:122
134491450,4ptp4l0-21swapper/322:44:403
134491450,4ptp4l0-21swapper/321:19:553
134491450,4ptp4l0-21swapper/320:47:353
134491450,4ptp4l0-21swapper/000:03:040
134491440,9ptp4l0-21swapper/222:45:452
134491440,9ptp4l0-21swapper/221:49:032
134491440,9ptp4l0-21swapper/200:28:092
134491440,7ptp4l0-21swapper/320:35:273
134491440,4ptp4l0-21swapper/319:26:583
134491440,4ptp4l0-21swapper/121:02:561
134491440,3ptp4l0-21swapper/121:39:551
134491440,10ptp4l0-21swapper/023:13:430
15233994337,4cyclictest41-21ksoftirqd/321:30:003
1523299439,7cyclictest0-21swapper/222:50:232
1523299433,7cyclictest16343-21apt-get22:40:022
134491430,9ptp4l0-21swapper/220:33:042
134491430,7ptp4l0-21swapper/119:39:141
134491430,5ptp4l0-21swapper/321:35:163
134491430,5ptp4l0-21swapper/219:40:032
134491430,4ptp4l25697-21apt-get21:50:123
134491430,4ptp4l0-21swapper/221:20:272
134491430,4ptp4l0-21swapper/021:30:150
134491430,3ptp4l0-21swapper/100:00:201
1523299425,6cyclictest134491ptp4l21:12:082
134491420,9ptp4l0-21swapper/323:04:103
134491420,5ptp4l8824-21diskstats20:05:160
134491420,5ptp4l6185-21/usr/sbin/munin00:35:160
134491420,5ptp4l0-21swapper/320:55:123
134491420,5ptp4l0-21swapper/122:40:231
134491420,4ptp4l6215-21apt-get20:00:121
134491420,4ptp4l30465-21ntp_states19:40:221
134491420,4ptp4l13893-21iostat_ios20:15:190
134491420,4ptp4l0-21swapper/020:54:000
134491420,3ptp4l0-21swapper/121:42:481
1523299416,5cyclictest33-21ksoftirqd/200:15:242
134491410,8ptp4l0-21swapper/219:49:212
134491410,8ptp4l0-21swapper/200:07:262
134491410,5ptp4l8509-21sshd21:10:540
134491410,5ptp4l0-21swapper/322:00:113
134491410,5ptp4l0-21swapper/221:40:042
134491410,5ptp4l0-21swapper/122:00:281
134491410,5ptp4l0-21swapper/022:50:120
134491410,4ptp4l31383-21users20:50:291
134491410,4ptp4l31262-21apt-get00:20:120
134491410,4ptp4l1851-21diskstats19:50:151
134491410,4ptp4l16224-21df21:30:171
134491410,4ptp4l12559-21iostat_ios22:30:160
134491410,4ptp4l10198-21/usr/sbin/munin20:05:291
134491410,4ptp4l0-21swapper/319:58:243
134491410,4ptp4l0-21swapper/222:23:292
134491410,4ptp4l0-21swapper/222:10:122
134491410,4ptp4l0-21swapper/120:15:301
134491410,4ptp4l0-21swapper/022:57:460
134491410,4ptp4l0-21swapper/022:29:490
134491410,4ptp4l0-21swapper/020:35:100
134491410,3ptp4l5813-21apt-get00:35:122
134491410,3ptp4l5244-21apt-get23:25:111
134491410,3ptp4l29317-21ls23:05:203
134491410,3ptp4l21198-21diskstats21:40:133
134491410,3ptp4l16276-21ls19:10:210
134491410,3ptp4l15401-21apt-get20:20:041
134491410,3ptp4l12830-21ls21:20:263
134491410,3ptp4l12411-21perl22:30:143
15233994033,4cyclictest41-21ksoftirqd/323:25:143
1523299405,7cyclictest8973-21ssh23:30:272
134491400,5ptp4l2420-21ps00:25:230
134491400,5ptp4l0-21swapper/321:30:253
134491400,5ptp4l0-21swapper/019:31:190
134491400,4ptp4l3792-21irqstats23:20:190
134491400,4ptp4l16816-21apt22:40:090
134491400,4ptp4l1523199cyclictest20:10:181
134491400,4ptp4l10139-21df_inode23:35:141
134491400,4ptp4l0-21swapper/321:45:153
134491400,4ptp4l0-21swapper/320:25:223
134491400,4ptp4l0-21swapper/320:23:383
134491400,4ptp4l0-21swapper/320:15:483
134491400,4ptp4l0-21swapper/223:37:302
134491400,4ptp4l0-21swapper/221:50:472
134491400,4ptp4l0-21swapper/221:36:092
134491400,4ptp4l0-21swapper/220:40:222
134491400,4ptp4l0-21swapper/220:01:112
134491400,4ptp4l0-21swapper/200:31:132
134491400,4ptp4l0-21swapper/122:50:181
134491400,4ptp4l0-21swapper/122:29:481
134491400,4ptp4l0-21swapper/121:55:131
134491400,4ptp4l0-21swapper/119:10:511
134491400,4ptp4l0-21swapper/023:55:200
134491400,4ptp4l0-21swapper/023:43:540
134491400,4ptp4l0-21swapper/022:15:240
134491400,4ptp4l0-21swapper/022:05:240
134491400,4ptp4l0-21swapper/021:05:130
134491400,4ptp4l0-21swapper/019:57:320
134491400,3ptp4l6915-21apt-get22:20:023
134491400,3ptp4l27717-21df_inode20:45:121
134491400,3ptp4l16825-21ls19:10:263
134491400,3ptp4l0-21swapper/122:47:001
134491400,3ptp4l0-21swapper/100:10:481
15233993934,3cyclictest41-21ksoftirqd/322:40:003
15233993933,4cyclictest41-21ksoftirqd/323:20:133
15233993928,9cyclictest41-21ksoftirqd/323:55:243
1523299393,5cyclictest0-21swapper/219:10:162
134491390,5ptp4l9-21ksoftirqd/023:50:050
134491390,4ptp4l0-21swapper/323:50:023
134491390,4ptp4l0-21swapper/323:45:223
134491390,4ptp4l0-21swapper/323:40:223
134491390,4ptp4l0-21swapper/323:12:103
134491390,4ptp4l0-21swapper/320:03:013
134491390,4ptp4l0-21swapper/319:49:573
134491390,4ptp4l0-21swapper/223:26:342
134491390,4ptp4l0-21swapper/223:12:162
134491390,4ptp4l0-21swapper/221:00:152
134491390,4ptp4l0-21swapper/220:46:572
134491390,4ptp4l0-21swapper/220:23:232
134491390,4ptp4l0-21swapper/219:30:332
134491390,4ptp4l0-21swapper/123:20:201
134491390,4ptp4l0-21swapper/122:34:041
134491390,4ptp4l0-21swapper/121:26:321
134491390,4ptp4l0-21swapper/121:23:291
134491390,4ptp4l0-21swapper/100:27:241
134491390,4ptp4l0-21swapper/022:36:290
134491390,4ptp4l0-21swapper/022:14:080
134491390,4ptp4l0-21swapper/022:02:040
134491390,4ptp4l0-21swapper/021:42:220
134491390,4ptp4l0-21swapper/019:50:240
134491390,4ptp4l0-21swapper/019:21:390
134491390,3ptp4l6215-21apt-get20:00:120
134491390,3ptp4l18675-21ntp_states19:15:231
134491390,3ptp4l0-21swapper/222:15:352
134491390,3ptp4l0-21swapper/222:06:312
134491390,3ptp4l0-21swapper/122:05:141
134491390,3ptp4l0-21swapper/023:31:540
134491390,3ptp4l0-21swapper/020:40:360
134491390,2ptp4l32684-21strings19:45:211
15233993834,2cyclictest41-21ksoftirqd/300:35:193
134491380,4ptp4l0-21swapper/323:35:383
134491380,4ptp4l0-21swapper/323:34:023
134491380,4ptp4l0-21swapper/322:45:583
134491380,4ptp4l0-21swapper/322:28:503
134491380,4ptp4l0-21swapper/322:05:153
134491380,4ptp4l0-21swapper/321:11:293
134491380,4ptp4l0-21swapper/321:04:333
134491380,4ptp4l0-21swapper/320:11:083
134491380,4ptp4l0-21swapper/319:50:243
134491380,4ptp4l0-21swapper/319:36:003
134491380,4ptp4l0-21swapper/300:33:523
134491380,4ptp4l0-21swapper/300:27:303
134491380,4ptp4l0-21swapper/300:21:003
134491380,4ptp4l0-21swapper/300:06:553
134491380,4ptp4l0-21swapper/300:02:253
134491380,4ptp4l0-21swapper/223:21:012
134491380,4ptp4l0-21swapper/123:32:351
134491380,4ptp4l0-21swapper/022:45:140
134491380,4ptp4l0-21swapper/021:51:320
134491380,4ptp4l0-21swapper/021:47:070
134491380,4ptp4l0-21swapper/021:21:110
134491380,4ptp4l0-21swapper/021:15:090
134491380,4ptp4l0-21swapper/019:25:240
134491380,3ptp4l0-21swapper/319:15:203
134491380,3ptp4l0-21swapper/219:55:382
134491380,3ptp4l0-21swapper/121:10:121
134491370,4ptp4l0-21swapper/321:06:483
134491370,4ptp4l0-21swapper/320:53:533
134491370,3ptp4l0-21swapper/119:21:451
15233993631,3cyclictest41-21ksoftirqd/300:15:183
134491360,4ptp4l0-21swapper/322:51:203
134491360,4ptp4l0-21swapper/319:32:353
134491360,4ptp4l0-21swapper/300:10:083
134491360,3ptp4l0-21swapper/320:40:273
134491360,3ptp4l0-21swapper/320:30:453
134491360,3ptp4l0-21swapper/121:15:111
134491350,3ptp4l0-21swapper/319:42:353
46198310,11rtkit-daemon0-21swapper/119:06:171
137891152,7phc2sys0-21swapper/019:08:460
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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