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2026-06-14 - 09:08
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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
Compare latency of primary with shadow system
Characteristics of the 50 highest latencies:
System rackeslot6.osadl.org (updated Sun Jun 14, 2026 00:44:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
285482199149134,11cyclictest1213033-21systemd-journal00:20:001
285482199137104,22cyclictest2960508-21latency_hist00:35:021
285482199127116,8cyclictest2894126-21kworker/u8:1+flush-179:022:45:241
285482099126118,5cyclictest2872926-21kworker/u8:1+flush-179:020:15:010
285482099126118,5cyclictest2872926-21kworker/u8:1+flush-179:020:15:010
285482199123114,7cyclictest2861285-21latency_hist19:30:011
28548219911593,19cyclictest2958918-21latency_hist00:30:001
285482199115106,6cyclictest2872926-21kworker/u8:1+flush-179:020:20:001
285482199111101,7cyclictest2859700-21latency_hist19:25:011
285482099111101,7cyclictest2897336-21latency_hist21:20:010
28548209910895,10cyclictest2934725-21apt-get23:15:000
28548209910495,6cyclictest1213033-21systemd-journal00:40:010
28548219910293,6cyclictest2894126-21kworker/u8:1+flush-179:022:00:261
2854821999976,20cyclictest2952549-21latency_hist00:10:021
2854820999988,7cyclictest1-21systemd20:35:000
2854821999889,6cyclictest2941368-21kworker/u8:2+flush-179:000:00:011
2854821999889,6cyclictest2941368-21kworker/u8:2+flush-179:000:00:001
2854820999789,5cyclictest2839684-21kworker/u8:3+flush-179:019:50:270
2854821999685,9cyclictest1213033-21systemd-journal20:35:001
2854820999586,7cyclictest2872949-21latency_hist20:05:010
2854820999586,6cyclictest2923319-21latency_hist22:40:010
2854821999487,5cyclictest2938126-21kworker/u8:1+flush-179:000:00:161
2854821999485,7cyclictest1213033-21systemd-journal23:10:001
2854820999276,13cyclictest1213033-21systemd-journal00:00:000
2854820999276,13cyclictest1213033-21systemd-journal00:00:000
2854821999080,7cyclictest1213033-21systemd-journal21:20:011
2854821998979,7cyclictest2942945-21latency_hist23:40:011
2854821998878,7cyclictest2861319-21kworker/u8:0+flush-179:019:35:221
2854820998879,6cyclictest2926737-21kworker/u8:2+flush-179:022:55:130
2854820998878,7cyclictest2862872-21latency_hist19:35:010
2854820998776,5cyclictest2896395-21kworker/u8:2+flush-179:021:30:240
2854820998576,6cyclictest1213033-21systemd-journal00:04:000
2854820998574,8cyclictest2874535-21latency_hist20:10:020
2854820998573,7cyclictest2872926-21kworker/u8:1+flush-179:020:15:220
2854820998477,5cyclictest2896395-21kworker/u8:2+flush-179:021:50:250
2854820998475,7cyclictest2894126-21kworker/u8:1+flush-179:021:40:000
2854821998375,6cyclictest2839684-21kworker/u8:3+flush-179:020:00:201
2854820998374,6cyclictest2933124-21latency_hist23:10:010
2854820998373,7cyclictest2896395-21kworker/u8:2+flush-179:021:25:220
2854820998275,5cyclictest2854599-21kworker/u8:1+flush-179:019:25:220
2854821998173,6cyclictest2926737-21kworker/u8:2+flush-179:022:50:181
2854821998170,8cyclictest2861541-21apt-get19:30:121
2854820998173,5cyclictest2938126-21kworker/u8:1+flush-179:023:35:230
2854821998069,8cyclictest2931539-21latency_hist23:05:011
2854820998073,5cyclictest2894126-21kworker/u8:1+events_unbound21:10:010
2854820998071,6cyclictest2894126-21kworker/u8:1+flush-179:022:45:150
2854820997973,4cyclictest2954135-21latency_hist00:15:020
2854820997973,4cyclictest2954135-21latency_hist00:15:010
2854820997971,5cyclictest2894126-21kworker/u8:1+flush-179:023:00:210
2854820997968,9cyclictest2856505-21latency_hist19:15:000
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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