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2026-03-15 - 08:40
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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 Sun Mar 15, 2026 00:45:47)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
138591224162,51phc2sys0-21swapper/319:06:013
139312205171,22sleep20-21swapper/219:09:272
137932205170,23sleep10-21swapper/119:07:371
138792200166,22sleep00-21swapper/019:08:440
1667021710,2sleep316675-21cpuspeed_turbos20:20:123
275712760,3sleep027575-21irqrtprio20:40:180
1427099596,16cyclictest18928-21latency_hist20:25:012
1427099574,16cyclictest900-21cat21:55:272
1427099574,16cyclictest29848-21df_abs00:00:162
1427099562,16cyclictest0-21swapper/223:30:162
138491560,1ptp4l401ktimersoftd/323:05:143
117422560,4sleep31427199cyclictest20:10:123
1427099555,17cyclictest10951-21systemctl23:20:222
1427099552,15cyclictest0-21swapper/200:06:392
1427099541,14cyclictest0-21swapper/221:20:212
1427099524,6cyclictest20845-21grep22:35:252
1427099523,9cyclictest1319-21snmpd00:15:412
1427099521,17cyclictest0-21swapper/220:45:032
138491520,1ptp4l401ktimersoftd/319:48:193
1427099515,8cyclictest2852-21cut23:05:182
1427099514,16cyclictest1621-21egrep20:55:122
1427099513,17cyclictest0-21swapper/220:30:242
1427099512,17cyclictest0-21swapper/221:10:162
1427099505,16cyclictest461-21dbus-daemon23:10:242
1427099504,16cyclictest12014-21grep23:25:122
1427099500,47cyclictest30579-21tr19:40:232
1427099492,16cyclictest0-21swapper/223:55:232
1427099491,16cyclictest15431-21/usr/sbin/munin20:15:252
1427099490,18cyclictest0-21swapper/222:30:152
1427099483,13cyclictest216082latency_hist19:25:002
1427099475,17cyclictest18268-21grep19:15:252
1427099471,16cyclictest0-21swapper/221:15:082
1427099471,15cyclictest0-21swapper/222:10:162
1427099465,14cyclictest2315-21gnome-shell19:49:592
1427099464,7cyclictest25777-21ps22:45:232
1427099450,17cyclictest0-21swapper/219:35:122
1427099442,8cyclictest15633-21ls00:35:192
1427099435,16cyclictest10334-21awk20:05:202
138491430,0ptp4l401ktimersoftd/322:21:383
138491430,0ptp4l401ktimersoftd/321:37:273
138491430,0ptp4l401ktimersoftd/321:10:223
138491430,0ptp4l401ktimersoftd/300:16:293
1427099425,7cyclictest8225-21ssh20:00:252
1427099424,8cyclictest20938-21ssh21:30:252
1427099424,7cyclictest3228-21irqstats00:10:182
1427099424,7cyclictest3228-21irqstats00:10:182
50798410,7rtkit-daemon0-21swapper/319:13:083
138491410,1ptp4l401ktimersoftd/322:50:373
50798400,9rtkit-daemon0-21swapper/321:54:073
1427099403,8cyclictest3150-21ps22:00:232
14270994035,3cyclictest21627-21dump-pmu-power23:45:012
14270994035,3cyclictest21627-21dump-pmu-power23:45:002
14270994011,27cyclictest0-21swapper/222:15:232
138491400,1ptp4l401ktimersoftd/323:28:483
138491400,0ptp4l401ktimersoftd/322:05:203
1427099395,7cyclictest12345-21iostat_ios22:20:172
1427099393,7cyclictest25450-21ps20:35:232
134991390,1getstats26229-1kworker/3:1H19:15:353
1427099383,9cyclictest1319-21snmpd22:26:252
1427099382,8cyclictest26003-21ls21:40:252
1427099382,7cyclictest17986-21ls21:25:202
14269993830,6cyclictest25-21ksoftirqd/122:15:001
138491380,1ptp4l401ktimersoftd/323:45:123
14269993731,4cyclictest25-21ksoftirqd/123:23:311
14271993631,3cyclictest41-21ksoftirqd/320:53:403
14269993630,4cyclictest25-21ksoftirqd/123:36:351
14269993630,4cyclictest25-21ksoftirqd/122:54:341
14271993529,4cyclictest41-21ksoftirqd/323:52:163
14271993529,4cyclictest41-21ksoftirqd/322:27:133
1427099354,16cyclictest5032-21irqrtprio22:05:182
14270993529,4cyclictest33-21ksoftirqd/223:39:362
14270993529,4cyclictest33-21ksoftirqd/223:04:412
1427099352,8cyclictest30891-21ls22:55:222
1427099352,7cyclictest379-21ps20:50:232
14269993530,3cyclictest25-21ksoftirqd/119:40:101
14269993529,4cyclictest25-21ksoftirqd/121:41:571
14269993529,4cyclictest25-21ksoftirqd/121:30:051
14269993529,4cyclictest25-21ksoftirqd/121:21:151
14269993529,4cyclictest25-21ksoftirqd/120:33:251
14269993529,4cyclictest25-21ksoftirqd/120:03:291
14269993529,4cyclictest25-21ksoftirqd/119:39:491
14269993529,4cyclictest25-21ksoftirqd/119:26:261
14269993529,4cyclictest25-21ksoftirqd/119:22:291
14268993529,4cyclictest9-21ksoftirqd/023:22:290
14268993529,4cyclictest9-21ksoftirqd/023:18:320
14268993529,4cyclictest9-21ksoftirqd/022:14:060
14268993529,4cyclictest9-21ksoftirqd/021:22:390
134991350,2getstats0-21swapper/320:15:363
14271993429,3cyclictest41-21ksoftirqd/323:58:303
14271993429,3cyclictest41-21ksoftirqd/322:43:403
14271993429,3cyclictest41-21ksoftirqd/300:10:403
14271993429,3cyclictest41-21ksoftirqd/300:10:403
14271993428,4cyclictest41-21ksoftirqd/321:48:573
14271993428,4cyclictest41-21ksoftirqd/321:33:083
14271993428,4cyclictest41-21ksoftirqd/320:26:583
14271993428,4cyclictest41-21ksoftirqd/319:50:273
14271993428,4cyclictest41-21ksoftirqd/300:31:283
14271993427,4cyclictest41-21ksoftirqd/322:19:263
14271993427,4cyclictest41-21ksoftirqd/321:20:083
14270993429,3cyclictest33-21ksoftirqd/220:10:102
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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