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2026-07-13 - 09:10
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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 Mon Jul 13, 2026 00:45:35)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1170621690,2sleep2324599cyclictest21:45:262
134491610,4ptp4l0-21swapper/220:20:592
134491610,22ptp4l0-21swapper/223:35:012
134491610,18ptp4l5734-21apt-get20:25:103
324499596,15cyclictest3962-21hddtemp_smartct22:40:161
216512590,7sleep0324399cyclictest00:25:260
134491590,4ptp4l0-21swapper/023:58:460
134491580,4ptp4l0-21swapper/222:44:422
134491580,4ptp4l0-21swapper/200:31:442
324499573,14cyclictest6428-21df_abs23:55:141
324399571,3cyclictest134491ptp4l20:20:260
134491570,4ptp4l0-21swapper/323:22:153
134491570,4ptp4l0-21swapper/023:53:180
134491570,4ptp4l0-21swapper/023:25:420
134491570,3ptp4l0-21swapper/119:45:291
324499568,14cyclictest3502-21sed19:10:151
324499566,12cyclictest21225-21grep23:15:291
324399560,2cyclictest137891phc2sys21:20:240
134491560,4ptp4l0-21swapper/322:04:463
134491560,4ptp4l0-21swapper/319:56:263
134491560,4ptp4l0-21swapper/223:28:552
134491560,4ptp4l0-21swapper/000:23:070
134491560,3ptp4l0-21swapper/000:01:010
134491550,4ptp4l0-21swapper/321:51:233
134491550,3ptp4l0-21swapper/319:21:013
134491550,3ptp4l0-21swapper/223:50:352
324499546,17cyclictest9519-21cat21:40:281
324499544,15cyclictest7047-21ps22:45:241
324699531,50cyclictest0-21swapper/320:04:283
134491530,3ptp4l0-21swapper/221:15:162
324499522,14cyclictest0-21swapper/121:55:201
134491520,4ptp4l0-21swapper/220:40:212
134491520,4ptp4l0-21swapper/220:00:202
134491520,3ptp4l0-21swapper/322:39:313
134491510,4ptp4l0-21swapper/222:34:322
134491510,3ptp4l0-21swapper/300:00:313
134491500,4ptp4l0-21swapper/323:50:113
134491500,4ptp4l0-21swapper/300:18:283
134491500,10ptp4l0-21swapper/320:16:463
324499495,12cyclictest27072-21iostat_ios21:10:191
134491490,4ptp4l324399cyclictest00:12:120
134491490,4ptp4l0-21swapper/220:14:092
134491490,3ptp4l21947-21dpkg22:10:012
324499485,13cyclictest22577-21iostat_ios23:20:181
134491480,4ptp4l0-21swapper/222:19:282
324499476,8cyclictest1964-21meminfo21:25:211
324499476,12cyclictest23303-21iostat00:30:201
324499476,12cyclictest10533-21df20:35:131
324499475,13cyclictest2110-21meminfo22:35:211
324499475,13cyclictest18342-21memory23:10:231
324499475,12cyclictest8331-21df_inode20:30:141
324499475,12cyclictest25548-21df_inode00:35:151
134491470,4ptp4l0-21swapper/220:47:152
134491470,3ptp4l324399cyclictest19:17:500
3245994639,4cyclictest10027-21cron21:44:592
324499466,6cyclictest0-21swapper/120:25:241
324499466,12cyclictest12786-21df_inode19:30:141
324499465,8cyclictest17864-21iostat_ios20:50:191
324499465,13cyclictest30039-21ntpq22:25:201
324499465,12cyclictest20788-21iostat00:25:181
324499465,12cyclictest15346-21iostat_ios19:35:181
134491460,6ptp4l1259-21hddtemp_smartct19:05:161
134491460,6ptp4l1259-21hddtemp_smartct19:05:161
134491460,4ptp4l26358-21ntp_states00:35:243
134491460,4ptp4l0-21swapper/223:33:472
134491460,4ptp4l0-21swapper/221:21:272
134491460,4ptp4l0-21swapper/200:36:372
134491460,4ptp4l0-21swapper/122:08:561
134491460,3ptp4l0-21swapper/322:05:523
134491460,3ptp4l0-21swapper/321:35:053
134491460,3ptp4l0-21swapper/221:13:082
134491460,3ptp4l0-21swapper/100:24:131
134491450,4ptp4l324399cyclictest21:05:430
134491450,4ptp4l1132-21apt-get22:35:140
134491450,4ptp4l0-21swapper/323:59:213
134491450,4ptp4l0-21swapper/222:29:382
134491450,4ptp4l0-21swapper/219:38:342
134491450,3ptp4l9-21ksoftirqd/022:33:410
134491450,3ptp4l77650irq/143-enp4s0-19:50:243
134491450,3ptp4l0-21swapper/223:40:182
134491450,3ptp4l0-21swapper/123:52:451
134491450,3ptp4l0-21swapper/121:08:341
134491450,10ptp4l2437-21uname23:45:192
324499445,14cyclictest7338-21users21:35:301
324499445,14cyclictest1347-21diskstats20:15:161
324499444,13cyclictest8972-21irqstats22:50:181
324499444,13cyclictest26917-21iostat_ios20:00:161
134491440,9ptp4l0-21swapper/323:08:433
134491440,5ptp4l0-21swapper/300:25:283
134491440,4ptp4l0-21swapper/319:41:233
134491440,4ptp4l0-21swapper/222:58:502
134491440,4ptp4l0-21swapper/221:25:372
134491440,3ptp4l0-21swapper/123:09:401
134491440,3ptp4l0-21swapper/121:16:311
134491440,3ptp4l0-21swapper/120:49:471
3245994337,3cyclictest33-21ksoftirqd/200:25:132
324499435,13cyclictest18083-21irqstats22:00:191
324499432,11cyclictest22394-21grep22:10:171
134491430,9ptp4l0-21swapper/223:02:432
134491430,9ptp4l0-21swapper/219:49:102
134491430,8ptp4l0-21swapper/219:20:592
134491430,8ptp4l0-21swapper/200:00:362
134491430,4ptp4l0-21swapper/300:11:503
134491430,4ptp4l0-21swapper/222:07:182
134491430,3ptp4l0-21swapper/320:41:303
134491430,3ptp4l0-21swapper/100:11:251
134491430,1ptp4l0-21swapper/300:30:273
134491430,10ptp4l0-21swapper/322:47:153
3245994237,3cyclictest33-21ksoftirqd/220:40:002
3245994230,10cyclictest33-21ksoftirqd/223:10:192
324499425,8cyclictest22109-21df21:00:111
3243994235,4cyclictest7777-21cron20:30:010
134491420,9ptp4l0-21swapper/223:15:282
134491420,9ptp4l0-21swapper/220:09:562
134491420,9ptp4l0-21swapper/219:16:502
134491420,8ptp4l0-21swapper/220:59:082
134491420,6ptp4l0-21swapper/322:17:573
134491420,5ptp4l19997-21/usr/sbin/munin23:15:163
134491420,5ptp4l0-21swapper/222:20:142
134491420,4ptp4l8970-21irqstats22:50:190
134491420,4ptp4l22006-21apt-get23:20:122
134491420,4ptp4l21607-21apt-get22:10:030
134491420,4ptp4l0-21swapper/322:41:343
134491420,4ptp4l0-21swapper/200:10:392
134491420,3ptp4l17930-21apt-get00:20:133
134491420,3ptp4l16021-21apache221:06:242
3246994134,4cyclictest717-21cron21:25:013
324499414,13cyclictest32368-21ntp_states22:30:241
134491410,9ptp4l0-21swapper/200:19:032
134491410,6ptp4l9-21ksoftirqd/020:10:000
134491410,5ptp4l0-21swapper/123:45:131
134491410,5ptp4l0-21swapper/022:45:230
134491410,5ptp4l0-21swapper/021:40:190
134491410,5ptp4l0-21swapper/019:20:160
134491410,5ptp4l0-21swapper/000:30:200
134491410,4ptp4l988-21apt-get21:25:130
134491410,4ptp4l3587-21diskstats19:10:163
134491410,4ptp4l31727-21iostat_ios20:10:181
134491410,4ptp4l30071-21ntp_states22:25:213
134491410,4ptp4l27118-21diskstats23:30:150
134491410,4ptp4l17392-21apt-get23:10:130
134491410,4ptp4l0-21swapper/323:25:163
134491410,4ptp4l0-21swapper/222:35:202
134491410,4ptp4l0-21swapper/220:54:202
134491410,4ptp4l0-21swapper/023:00:210
134491410,4ptp4l0-21swapper/020:05:150
134491410,3ptp4l26810-21apt-get23:30:133
134491410,3ptp4l26664-21apt-get22:20:133
134491410,3ptp4l18407-21ntp_states20:50:230
134491410,3ptp4l14778-21apt-get19:35:123
134491410,3ptp4l11540-21ntp_states22:55:233
134491410,3ptp4l0-21swapper/320:51:323
3245994036,2cyclictest33-21ksoftirqd/200:00:012
3245994035,3cyclictest33-21ksoftirqd/221:30:132
324499404,12cyclictest27235-21hddtemp_smartct23:30:171
324499404,12cyclictest11102-21df_inode00:05:141
134491400,5ptp4l0-21swapper/322:10:143
134491400,5ptp4l0-21swapper/123:00:131
134491400,5ptp4l0-21swapper/119:20:131
134491400,5ptp4l0-21swapper/023:05:210
134491400,5ptp4l0-21swapper/000:37:390
134491400,4ptp4l9240-21ntp_states22:50:232
134491400,4ptp4l8238-21df20:30:142
134491400,4ptp4l4398-21ntp_states19:10:242
134491400,4ptp4l3647-21df20:20:133
134491400,4ptp4l30203-21python20:05:261
134491400,4ptp4l26501-21apt-get21:10:140
134491400,4ptp4l0-21swapper/323:35:163
134491400,4ptp4l0-21swapper/323:10:273
134491400,4ptp4l0-21swapper/223:05:162
134491400,4ptp4l0-21swapper/222:01:402
134491400,4ptp4l0-21swapper/220:28:452
134491400,4ptp4l0-21swapper/220:15:192
134491400,4ptp4l0-21swapper/219:31:442
134491400,4ptp4l0-21swapper/123:35:231
134491400,4ptp4l0-21swapper/120:55:151
134491400,4ptp4l0-21swapper/100:15:131
134491400,4ptp4l0-21swapper/023:45:210
134491400,4ptp4l0-21swapper/022:19:180
134491400,4ptp4l0-21swapper/021:15:310
134491400,4ptp4l0-21swapper/020:47:170
134491400,4ptp4l0-21swapper/020:00:120
134491400,4ptp4l0-21swapper/019:08:250
134491400,4ptp4l0-21swapper/019:08:250
134491400,3ptp4l17149-21apt-get19:40:121
134491400,3ptp4l13001-21hddtemp_smartct21:50:162
134491400,3ptp4l12470-21users00:05:290
134491400,3ptp4l11668-21python20:35:253
134491400,3ptp4l10280-21apt-get21:45:123
134491390,5ptp4l24118-21cpuspeed19:55:152
134491390,5ptp4l10495-21entropy19:25:151
134491390,5ptp4l0-21swapper/321:10:163
134491390,5ptp4l0-21swapper/319:49:113
134491390,5ptp4l0-21swapper/119:55:251
134491390,5ptp4l0-21swapper/023:43:380
134491390,5ptp4l0-21swapper/022:22:000
134491390,5ptp4l0-21swapper/020:55:190
134491390,4ptp4l17051-21expr00:15:270
134491390,4ptp4l0-21swapper/323:44:213
134491390,4ptp4l0-21swapper/323:00:243
134491390,4ptp4l0-21swapper/322:30:273
134491390,4ptp4l0-21swapper/321:00:133
134491390,4ptp4l0-21swapper/320:45:033
134491390,4ptp4l0-21swapper/320:10:233
134491390,4ptp4l0-21swapper/319:25:273
134491390,4ptp4l0-21swapper/319:09:463
134491390,4ptp4l0-21swapper/319:09:463
134491390,4ptp4l0-21swapper/222:46:092
134491390,4ptp4l0-21swapper/221:55:202
134491390,4ptp4l0-21swapper/221:36:222
134491390,4ptp4l0-21swapper/121:30:241
134491390,4ptp4l0-21swapper/120:20:391
134491390,4ptp4l0-21swapper/100:01:011
134491390,4ptp4l0-21swapper/023:39:570
134491390,4ptp4l0-21swapper/023:20:170
134491390,4ptp4l0-21swapper/023:16:550
134491390,4ptp4l0-21swapper/022:56:340
134491390,4ptp4l0-21swapper/022:29:070
134491390,4ptp4l0-21swapper/022:00:200
134491390,4ptp4l0-21swapper/020:30:150
134491390,4ptp4l0-21swapper/020:16:470
134491390,4ptp4l0-21swapper/019:54:530
134491390,4ptp4l0-21swapper/019:40:300
134491390,4ptp4l0-21swapper/019:30:190
134491390,4ptp4l0-21swapper/019:28:070
134491390,4ptp4l0-21swapper/019:14:000
134491390,3ptp4l16331-21ls19:35:270
134491390,3ptp4l0-21swapper/320:30:243
134491390,3ptp4l0-21swapper/221:02:512
134491390,2ptp4l4214-21irqstats21:30:190
134491380,5ptp4l0-21swapper/219:09:452
134491380,5ptp4l0-21swapper/219:09:452
134491380,4ptp4l7159-21unixbench_multi19:15:281
134491380,4ptp4l25146-21ls21:05:213
134491380,4ptp4l0-21swapper/322:50:173
134491380,4ptp4l0-21swapper/321:55:253
134491380,4ptp4l0-21swapper/321:34:053
134491380,4ptp4l0-21swapper/321:26:553
134491380,4ptp4l0-21swapper/320:55:433
134491380,4ptp4l0-21swapper/320:05:153
134491380,4ptp4l0-21swapper/319:30:153
134491380,4ptp4l0-21swapper/300:05:133
134491380,4ptp4l0-21swapper/219:51:082
134491380,4ptp4l0-21swapper/219:28:112
134491380,4ptp4l0-21swapper/123:27:561
134491380,4ptp4l0-21swapper/122:56:171
134491380,4ptp4l0-21swapper/120:40:141
134491380,4ptp4l0-21swapper/022:40:170
134491380,4ptp4l0-21swapper/022:05:160
134491380,4ptp4l0-21swapper/021:35:160
134491380,4ptp4l0-21swapper/021:00:120
134491380,4ptp4l0-21swapper/020:40:170
134491380,4ptp4l0-21swapper/020:37:020
134491380,4ptp4l0-21swapper/019:55:230
134491380,4ptp4l0-21swapper/019:47:290
134491380,3ptp4l18868-21ls00:20:192
134491380,3ptp4l0-21swapper/323:45:273
134491380,3ptp4l0-21swapper/321:40:233
134491380,3ptp4l0-21swapper/321:15:113
134491380,3ptp4l0-21swapper/200:05:152
134491380,3ptp4l0-21swapper/119:50:231
134491380,3ptp4l0-21swapper/021:54:150
134491380,3ptp4l0-21swapper/021:45:250
134491370,4ptp4l0-21swapper/219:40:152
134491370,4ptp4l0-21swapper/123:40:171
134491370,4ptp4l0-21swapper/121:50:121
134491370,4ptp4l0-21swapper/021:56:550
134491370,3ptp4l0-21swapper/319:17:533
134491370,3ptp4l0-21swapper/122:22:361
134491370,3ptp4l0-21swapper/122:18:321
134491370,3ptp4l0-21swapper/121:23:251
134491360,3ptp4l0-21swapper/121:47:561
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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