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2026-07-21 - 22:23
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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 100 highest latencies:
System rackdslot3.osadl.org (updated Tue Jul 21, 2026 12:45:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
38112236169,23sleep30-21swapper/307:06:353
38102207172,23sleep20-21swapper/207:06:332
40792204171,23sleep00-21swapper/007:09:570
40482203171,21sleep10-21swapper/107:09:341
2970221410,4sleep0437599cyclictest09:10:140
437599576,17cyclictest3089-21latency_hist08:15:000
437599573,18cyclictest0-21swapper/009:59:340
437599557,9cyclictest3202-21grep10:30:130
437599549,8cyclictest27459-21/usr/sbin/munin09:05:150
437599533,15cyclictest0-21swapper/009:30:140
437599533,14cyclictest0-21swapper/009:00:170
437599528,8cyclictest9464-21df_abs09:35:130
437799514,6cyclictest32534-21iwlist09:15:192
437599517,7cyclictest10410-21kernelversion11:50:200
437599517,17cyclictest6049-21hwlatdetect10:35:160
437599516,16cyclictest5831-21awk07:10:240
437599513,16cyclictest0-21swapper/008:20:230
4377995019,3cyclictest33-21ksoftirqd/209:03:372
437599504,15cyclictest0-21swapper/009:45:170
437599497,8cyclictest14626-21hddtemp_smartct07:30:180
437599497,8cyclictest14626-21hddtemp_smartct07:30:180
437599492,16cyclictest0-21swapper/012:35:190
437599487,9cyclictest21302-21ssh08:50:260
325832480,3sleep032587-21irqrtprio11:30:190
4376994718,27cyclictest0-21swapper/112:15:531
437599478,8cyclictest14738-21hddtemp_smartct12:00:180
437599473,15cyclictest0-21swapper/008:40:160
437599467,9cyclictest27397-21df11:20:140
437599466,7cyclictest6770-21apt-get07:15:110
437599465,7cyclictest23600-21apt-get07:50:100
437599463,7cyclictest31879-21ls08:05:230
4375994610,18cyclictest28714-21awk10:15:160
437799453,5cyclictest6650-21cat07:15:002
437599455,7cyclictest16244-21apt-get09:50:120
139391450,2ptp4l391rcuc/311:05:183
139391450,0ptp4l401ktimersoftd/311:00:203
4378994437,4cyclictest13654-21cron07:29:593
4376994438,3cyclictest18707-21cron12:10:001
437599447,7cyclictest26914-21if_err_enp1s012:25:190
437599447,7cyclictest17716-21df08:45:150
437599437,18cyclictest10566-21df10:45:120
437599436,7cyclictest29861-21diskstats11:25:160
437799426,5cyclictest33-21ksoftirqd/211:35:172
4377994220,3cyclictest33-21ksoftirqd/210:27:222
437599427,13cyclictest28858-21perl08:00:180
437599426,8cyclictest17249-21iostat_ios12:05:180
437599426,7cyclictest17511-21meminfo07:35:200
437599425,7cyclictest8470-21ls11:45:270
139391420,0ptp4l401ktimersoftd/309:45:193
139391420,0ptp4l401ktimersoftd/309:13:123
437799414,7cyclictest8141-21systemctl09:30:252
437599416,13cyclictest4402-21cpuspeed11:40:140
317492410,3sleep20-21swapper/212:35:162
139391410,34ptp4l0-21swapper/307:10:013
437599407,8cyclictest3298-21ps09:20:240
437599406,7cyclictest7941-21apt-get08:25:130
437599405,7cyclictest11804-21ls08:30:280
437599405,12cyclictest22828-21ls12:15:270
437599403,8cyclictest24676-21ls10:05:230
139391400,0ptp4l401ktimersoftd/307:52:203
4378993926,4cyclictest41-21ksoftirqd/309:21:573
437699393,4cyclictest0-21swapper/112:30:291
57898380,2rtkit-daemon577-21rtkit-daemon08:06:023
4377993828,9cyclictest33-21ksoftirqd/210:45:562
4377993813,6cyclictest33-21ksoftirqd/211:20:032
4378993731,4cyclictest1300-21snmpd09:02:143
4377993732,3cyclictest33-21ksoftirqd/211:15:122
4376993731,4cyclictest25-21ksoftirqd/109:27:561
4376993731,4cyclictest25-21ksoftirqd/108:40:481
4376993730,5cyclictest25-21ksoftirqd/112:21:471
4376993730,5cyclictest25-21ksoftirqd/109:42:081
4376993712,22cyclictest28042-21sshd10:14:461
437599376,11cyclictest25979-21cpu07:55:150
4378993631,3cyclictest41-21ksoftirqd/312:00:133
4377993626,9cyclictest33-21ksoftirqd/208:44:492
437799361,5cyclictest33-21ksoftirqd/207:40:132
4376993631,3cyclictest25-21ksoftirqd/110:41:341
4376993630,4cyclictest25-21ksoftirqd/110:24:461
4376993630,4cyclictest25-21ksoftirqd/110:24:451
4376993630,4cyclictest25-21ksoftirqd/109:23:441
4376993630,4cyclictest25-21ksoftirqd/109:14:241
4376993630,4cyclictest25-21ksoftirqd/108:39:061
4376993630,4cyclictest25-21ksoftirqd/108:14:161
4376993630,4cyclictest25-21ksoftirqd/108:05:091
4376993629,4cyclictest25-21ksoftirqd/111:00:471
4378993529,4cyclictest41-21ksoftirqd/312:25:383
4378993529,4cyclictest41-21ksoftirqd/310:53:583
4378993529,4cyclictest41-21ksoftirqd/307:41:243
4377993530,3cyclictest33-21ksoftirqd/207:55:132
4377993529,4cyclictest33-21ksoftirqd/210:37:262
4377993529,4cyclictest33-21ksoftirqd/209:29:062
4377993529,4cyclictest33-21ksoftirqd/208:25:282
437799352,8cyclictest33-21ksoftirqd/210:14:122
4376993529,4cyclictest25-21ksoftirqd/112:37:561
4376993529,4cyclictest25-21ksoftirqd/111:30:321
4376993529,4cyclictest25-21ksoftirqd/109:09:231
4376993512,21cyclictest14181-21sed10:50:261
437599353,7cyclictest17911-21hddtemp_smartct11:00:170
4378993429,3cyclictest41-21ksoftirqd/311:42:513
4378993429,3cyclictest41-21ksoftirqd/310:20:113
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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