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2026-04-10 - 16:59
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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 rackdslot4.osadl.org (updated Fri Apr 10, 2026 12:45:46)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
138591227165,51phc2sys0-21swapper/307:05:503
253142204170,22sleep20-21swapper/207:08:482
252832202169,22sleep10-21swapper/107:08:221
253122200166,22sleep00-21swapper/007:08:460
2570999575,10cyclictest4747-21timedrift09:40:243
2570999563,16cyclictest22851-21cat11:25:003
25708995212,3cyclictest2235-21mailstats07:25:242
2570999510,17cyclictest0-21swapper/310:45:193
2570999497,11cyclictest50798rtkit-daemon11:10:143
2570999473,7cyclictest30432-21sshd07:19:453
50798460,8rtkit-daemon0-21swapper/207:52:112
2570999464,16cyclictest5856-21grep07:35:133
2570999463,17cyclictest22828-21date12:30:003
2570999462,9cyclictest2315-21gnome-shell09:22:583
2570999462,7cyclictest14729-21ssh11:05:293
2570999462,16cyclictest5678-21/usr/sbin/munin08:40:243
25706994641,3cyclictest22874-21turbostat.cron09:15:000
2570999452,17cyclictest1012-21df_abs09:35:143
2541524532,7sleep20-21swapper/207:10:012
2570999443,7cyclictest23440-21diskstats11:25:163
2570999442,16cyclictest3279-21/usr/sbin/munin07:30:173
2570899440,43cyclictest0-21swapper/208:35:242
2570999433,7cyclictest2315-21gnome-shell08:18:593
2570999433,7cyclictest18545-21fschecks_count11:15:153
2570999433,7cyclictest17135-21mailstats10:05:233
2570999431,18cyclictest17407-21ls09:00:263
2570899430,41cyclictest0-21swapper/210:15:232
2570999422,16cyclictest27592-21taskset11:30:573
2570999421,7cyclictest16332-21ps07:55:183
2570999420,7cyclictest21858-21ps08:05:223
138491420,0ptp4l401ktimersoftd/311:42:253
2570999413,7cyclictest8874-21iostat_ios08:45:173
25709994129,10cyclictest41-21ksoftirqd/310:40:103
2570999412,17cyclictest22116-21cat10:15:233
2570999411,8cyclictest4528-21ps11:50:223
2570999411,7cyclictest31224-21ps10:35:183
138491410,0ptp4l401ktimersoftd/308:55:203
2570999403,7cyclictest31741-21ls09:30:203
2570999403,14cyclictest10668-21/usr/sbin/munin07:45:143
25708994017,19cyclictest9319-21cat12:00:182
25708994012,27cyclictest0-21swapper/209:10:332
2570899400,38cyclictest0-21swapper/209:40:132
2570999392,8cyclictest31722-21irqstats07:20:183
25708993932,4cyclictest33-21ksoftirqd/212:40:002
2570999383,16cyclictest23450-21diskstats08:10:163
2570999383,15cyclictest19861-21unixbench_multi10:10:253
2570999381,8cyclictest7819-21apt-get09:50:023
2570999381,7cyclictest19787-21ls09:05:243
25706993831,4cyclictest9-21ksoftirqd/008:55:040
25706993830,5cyclictest9-21ksoftirqd/012:30:110
25709993731,4cyclictest41-21ksoftirqd/310:24:253
2570999372,7cyclictest13677-21diskstats10:00:143
2570999372,13cyclictest27072-21mailstats10:25:253
2570999372,13cyclictest27072-21mailstats10:25:243
2570999371,7cyclictest27516-21ls07:10:243
2570999371,13cyclictest16880-21ps12:15:213
25708993731,4cyclictest33-21ksoftirqd/212:16:492
25708993731,4cyclictest33-21ksoftirqd/207:46:542
25707993730,4cyclictest25-21ksoftirqd/112:24:301
25706993732,3cyclictest9-21ksoftirqd/011:35:000
25709993630,4cyclictest41-21ksoftirqd/309:19:023
2570999360,7cyclictest29755-21ls10:30:233
25708993631,3cyclictest33-21ksoftirqd/211:59:592
25708993630,4cyclictest33-21ksoftirqd/211:34:252
25708993630,4cyclictest33-21ksoftirqd/210:43:382
25708993630,4cyclictest33-21ksoftirqd/207:55:332
25708993630,4cyclictest33-21ksoftirqd/207:32:462
25708993612,3cyclictest22143-21sshd11:20:242
2570899360,35cyclictest0-21swapper/210:25:232
2570899360,35cyclictest0-21swapper/210:25:232
25707993630,4cyclictest25-21ksoftirqd/111:49:281
25707993630,4cyclictest25-21ksoftirqd/111:22:081
25707993630,4cyclictest25-21ksoftirqd/110:52:591
25707993630,4cyclictest25-21ksoftirqd/110:21:301
25707993630,4cyclictest25-21ksoftirqd/109:54:591
25707993630,4cyclictest25-21ksoftirqd/109:49:011
25707993630,4cyclictest25-21ksoftirqd/108:12:201
25707993630,4cyclictest25-21ksoftirqd/107:34:291
25707993630,4cyclictest25-21ksoftirqd/107:24:381
25706993631,3cyclictest10492-21cron09:55:000
25706993630,4cyclictest9-21ksoftirqd/008:48:380
25706993630,4cyclictest9-21ksoftirqd/008:24:030
25709993530,3cyclictest41-21ksoftirqd/309:15:003
25708993529,4cyclictest33-21ksoftirqd/210:38:442
25708993529,4cyclictest33-21ksoftirqd/208:50:412
25708993529,4cyclictest33-21ksoftirqd/207:39:132
25708993528,5cyclictest33-21ksoftirqd/212:22:272
25708993528,4cyclictest33-21ksoftirqd/211:27:592
25708993524,9cyclictest33-21ksoftirqd/208:20:232
2570899350,7cyclictest2931-21latency_hist09:40:002
25707993530,3cyclictest25-21ksoftirqd/111:40:111
25707993529,4cyclictest25-21ksoftirqd/112:38:141
25707993529,4cyclictest25-21ksoftirqd/112:32:201
25707993529,4cyclictest25-21ksoftirqd/111:08:561
25707993529,4cyclictest25-21ksoftirqd/109:58:351
25707993529,4cyclictest25-21ksoftirqd/109:44:471
25707993529,4cyclictest25-21ksoftirqd/109:11:101
25707993529,4cyclictest25-21ksoftirqd/109:07:011
25707993528,4cyclictest25-21ksoftirqd/111:30:001
25707993520,5cyclictest25-21ksoftirqd/111:00:501
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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