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2026-08-18 - 15:04
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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 50 highest latencies:
System rackdslot3.osadl.org (updated Tue Aug 18, 2026 00:45:53)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
139491204170,23phc2sys0-21swapper/319:05:113
275562203169,22sleep20-21swapper/219:06:112
278512202170,21sleep10-21swapper/119:09:561
275592201168,22sleep00-21swapper/019:06:130
1393911290,0ptp4l391rcuc/323:00:193
139391890,1ptp4l17777-21cat22:10:143
57898640,51rtkit-daemon0-21swapper/019:10:010
139391610,1ptp4l401ktimersoftd/321:08:183
177342590,2sleep02815199cyclictest21:00:290
165252570,5sleep2311rcuc/200:20:262
139391540,1ptp4l401ktimersoftd/320:53:423
139391530,0ptp4l401ktimersoftd/321:22:133
28152995223,4cyclictest25-21ksoftirqd/121:35:211
2815199527,3cyclictest9-21ksoftirqd/020:48:180
2815199527,3cyclictest9-21ksoftirqd/020:48:180
28152995122,3cyclictest25-21ksoftirqd/123:00:271
28152995020,4cyclictest25-21ksoftirqd/122:55:211
28154994925,15cyclictest41-21ksoftirqd/300:00:153
28152994919,3cyclictest25-21ksoftirqd/121:25:261
28152994919,3cyclictest25-21ksoftirqd/121:25:261
134391490,4getstats2815499cyclictest23:13:503
134391490,4getstats2815499cyclictest23:13:503
28152994820,3cyclictest25-21ksoftirqd/123:10:241
28152994820,3cyclictest25-21ksoftirqd/123:10:241
28151994817,2cyclictest121rcu_preempt00:35:140
28152994717,8cyclictest25-21ksoftirqd/122:35:011
2815199477,2cyclictest9-21ksoftirqd/020:20:230
2815199474,3cyclictest9-21ksoftirqd/020:25:210
28151994713,8cyclictest9-21ksoftirqd/000:15:010
28152994616,4cyclictest25-21ksoftirqd/120:25:161
28152994513,3cyclictest21480-21irqrtprio23:25:201
2815299450,3cyclictest29082-21latency_hist22:35:011
2815199455,7cyclictest9-21ksoftirqd/000:00:210
28151994538,4cyclictest20753-21sh21:10:000
28151994421,4cyclictest9-21ksoftirqd/023:20:270
139391440,0ptp4l401ktimersoftd/323:46:543
139391440,0ptp4l401ktimersoftd/320:13:403
2815199433,7cyclictest9-21ksoftirqd/019:25:250
2815199431,7cyclictest9-21ksoftirqd/022:25:200
28151994311,6cyclictest9-21ksoftirqd/020:15:230
139391430,0ptp4l401ktimersoftd/300:20:153
28154994229,6cyclictest41-21ksoftirqd/300:30:273
28154994227,4cyclictest41-21ksoftirqd/319:30:183
28154994224,8cyclictest41-21ksoftirqd/323:20:273
28152994237,3cyclictest25-21ksoftirqd/122:15:001
28152994211,3cyclictest25-21ksoftirqd/120:45:001
2815199428,10cyclictest9-21ksoftirqd/021:55:190
2815199424,4cyclictest9-21ksoftirqd/019:35:240
28151994237,3cyclictest22845-21grep23:30:010
2815199420,8cyclictest9-21ksoftirqd/020:50:210
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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