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2026-04-20 - 23:49
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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 Mon Apr 20, 2026 12:45:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
139491205172,22phc2sys0-21swapper/307:06:593
204632200168,21sleep20-21swapper/207:07:572
204372200168,22sleep10-21swapper/107:07:351
203162197164,22sleep00-21swapper/007:06:020
3103621440,5sleep02092299cyclictest12:00:140
139491137111,14phc2sys0-21swapper/307:10:013
139391820,1ptp4l20781-21latency_hist11:40:013
2092499649,12cyclictest16718-21grep12:35:292
20924996412,9cyclictest18545-21latency_hist11:35:002
260732630,2sleep20-21swapper/209:35:152
2092499638,18cyclictest0-21swapper/209:40:262
20924996314,9cyclictest4348-21date11:05:002
20924996313,9cyclictest31993-21latency_hist08:40:012
20924996313,9cyclictest18313-21sed08:10:182
20924996313,9cyclictest13033-21sed09:05:262
20924996310,17cyclictest17263-21cat10:24:592
2092499629,10cyclictest11288-21sed07:55:192
2092499628,10cyclictest23176-21latency_hist11:45:002
20924996213,9cyclictest11795-21unixbench_multi10:10:272
20924996212,9cyclictest1230-21timerwakeupswit08:40:282
2092499619,11cyclictest8348-21timerwakeupswit11:10:272
2092499616,20cyclictest0-21swapper/209:20:282
20924996113,10cyclictest24727-21sed09:30:232
20924996111,10cyclictest31550-21cut12:00:192
20924996111,10cyclictest15116-21date08:05:002
2092499609,17cyclictest18308-21irqrtprio10:25:192
2092499609,16cyclictest3562-21idleruntime09:55:162
2092499609,12cyclictest24443-21sendmail-msp10:40:012
2092499607,16cyclictest0-21swapper/209:00:112
2092499607,16cyclictest0-21swapper/209:00:112
20924996012,9cyclictest13097-21cut12:30:162
20924996012,10cyclictest21534-21timerwakeupswit10:30:252
20924996011,8cyclictest1329-21cut07:35:162
2092499598,17cyclictest207-21systemd-journal10:08:052
2092499597,16cyclictest0-21swapper/208:50:172
20924995912,9cyclictest25323-21df_abs08:25:142
2092499589,9cyclictest27374-21cat11:50:252
2092499589,9cyclictest27374-21cat11:50:252
2092499586,16cyclictest0-21swapper/212:20:242
2092499585,14cyclictest0-21swapper/207:20:122
20924995811,16cyclictest3807-21fschecks_time07:40:172
20924995811,16cyclictest15630-21tune2fs08:05:172
20924995810,8cyclictest20961-21cut08:15:192
139391580,1ptp4l401ktimersoftd/307:40:153
2092499579,17cyclictest25518-21cut10:40:192
2092499579,11cyclictest9337-21cstates11:15:142
2092499578,11cyclictest0-21swapper/210:45:132
2092499576,18cyclictest0-21swapper/209:10:202
2092499569,15cyclictest24941-21cat11:45:252
2092499569,11cyclictest25924-21latency_hist07:20:002
2092499567,11cyclictest0-21swapper/211:10:002
20924995613,9cyclictest28346-21/usr/sbin/munin11:55:202
64972550,2sleep10-21swapper/112:15:191
2092499559,8cyclictest4429-21ps12:10:242
2092499549,11cyclictest21925-21sed07:10:192
2092499545,18cyclictest0-21swapper/208:45:142
20924995412,16cyclictest5941-21/usr/sbin/munin10:00:162
20924995411,9cyclictest30898-21cstates09:45:152
20924995410,14cyclictest721-21date07:35:002
2092499537,15cyclictest0-21swapper/207:50:232
2092499537,10cyclictest0-21swapper/211:25:242
2092399531,3cyclictest23083-21apt-get07:15:031
2092499529,8cyclictest0-21swapper/210:15:272
2092499529,15cyclictest23358-21date09:30:002
20924995210,16cyclictest9083-21date08:59:592
20924995011,7cyclictest954-21diskstats09:50:152
20924995010,8cyclictest1761-21gpgv11:00:012
20925994942,4cyclictest6510-21latency_hist11:10:013
20924994911,8cyclictest29764-21df_inode10:50:152
20924994812,6cyclictest23609-21meminfo08:20:192
20924994811,6cyclictest19679-21meminfo11:35:192
2092499479,7cyclictest30181-21ls07:25:272
20924994710,6cyclictest6713-21meminfo07:45:202
139391460,1ptp4l401ktimersoftd/309:43:323
20924994510,6cyclictest27702-21diskstats08:30:152
2092499438,15cyclictest2365-21ls12:05:262
139391430,0ptp4l401ktimersoftd/311:40:303
2092499427,7cyclictest11361-21ls12:25:212
2092499426,17cyclictest0-21swapper/211:20:142
139391420,0ptp4l401ktimersoftd/308:00:343
20925994137,2cyclictest41-21ksoftirqd/310:40:003
20925994136,3cyclictest41-21ksoftirqd/312:40:003
57898400,8rtkit-daemon0-21swapper/312:12:023
20925994035,3cyclictest41-21ksoftirqd/308:20:003
139391400,0ptp4l401ktimersoftd/307:23:553
57898390,9rtkit-daemon0-21swapper/309:50:353
57898390,10rtkit-daemon0-21swapper/308:12:553
20925993935,3cyclictest41-21ksoftirqd/310:00:013
139391390,0ptp4l401ktimersoftd/308:35:223
20923993831,5cyclictest25-21ksoftirqd/109:15:481
2092399380,1cyclictest0-21swapper/108:30:331
20925993733,2cyclictest41-21ksoftirqd/307:45:193
20925993728,5cyclictest41-21ksoftirqd/310:25:133
2092599371,2cyclictest121rcu_preempt11:50:153
2092599371,2cyclictest121rcu_preempt11:50:153
20923993731,4cyclictest25-21ksoftirqd/110:48:311
20923993731,4cyclictest25-21ksoftirqd/109:39:061
20925993631,3cyclictest41-21ksoftirqd/308:50:003
20925993631,3cyclictest41-21ksoftirqd/308:20:193
20925993630,4cyclictest41-21ksoftirqd/310:46:173
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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