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2026-05-22 - 10:08
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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 rackdslot1.osadl.org (updated Fri May 22, 2026 00:45:40)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1925921510,7sleep02814599cyclictest21:10:040
1297521370,6sleep22814799cyclictest19:45:212
2814899732,29cyclictest0-21swapper/323:00:183
134491700,6ptp4l33-21ksoftirqd/221:26:092
134491700,4ptp4l1301-21snmpd19:40:062
134491690,30ptp4l17900-21sh21:05:242
28146996813,12cyclictest32691-21chrt22:46:011
2814699677,58cyclictest0-21swapper/119:45:251
28146996713,11cyclictest23897-21chrt23:36:441
134491660,4ptp4l26646-21date23:45:010
2814699659,16cyclictest0-21swapper/123:55:161
28146996513,12cyclictest4612-21chrt20:35:511
28146996513,11cyclictest26176-21taskset21:25:091
28146996413,12cyclictest25689-21taskset22:32:331
28146996413,11cyclictest21105-21taskset22:22:381
28146996413,10cyclictest21110-21chrt21:12:131
28146996413,10cyclictest13944-21taskset20:57:231
28146996314,10cyclictest5335-21taskset21:50:051
28146996313,11cyclictest19058-21chrt23:26:171
28146996313,11cyclictest18517-21taskset19:55:431
28146996213,11cyclictest27933-21chrt20:18:141
28146996213,11cyclictest14286-21chrt22:09:381
134491620,4ptp4l24291-21iostat20:10:160
134491610,9ptp4l0-21swapper/319:05:243
134491610,5ptp4l0-21swapper/219:09:252
2814699601,57cyclictest21025-21kworker/1:020:23:091
2814699597,15cyclictest9181-21timerwakeupswit21:55:301
28146995914,11cyclictest2717-21chrt22:51:551
28146995914,10cyclictest16212-21chrt19:53:581
143432590,2sleep314336-21awk22:10:013
134491590,5ptp4l25-21ksoftirqd/123:22:331
134491590,4ptp4l0-21swapper/222:28:572
134491590,3ptp4l0-21swapper/000:05:290
2814899585,9cyclictest13408-21grep20:55:243
28148995827,8cyclictest41-21ksoftirqd/322:50:243
2814899582,23cyclictest0-21swapper/321:35:203
28146995814,9cyclictest19729-21chrt00:38:231
28146995810,15cyclictest11711-21latency_hist19:45:001
272992580,7sleep02814599cyclictest23:45:180
134491580,4ptp4l0-21swapper/020:56:440
134491580,3ptp4l0-21swapper/322:25:293
134491580,3ptp4l0-21swapper/021:25:380
2814699579,17cyclictest14901-21cat21:00:171
134491570,4ptp4l0-21swapper/320:43:443
134491570,4ptp4l0-21swapper/023:50:170
134491570,3ptp4l0-21swapper/223:59:352
134491570,3ptp4l0-21swapper/220:44:392
134491570,3ptp4l0-21swapper/021:15:170
28146995614,38cyclictest32375-21seq20:26:031
134491560,4ptp4l0-21swapper/122:10:201
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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