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2026-06-09 - 13:55
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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 Tue Jun 09, 2026 00:44:53)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
190340699130115,11cyclictest1971056-21latency_hist22:40:011
190340599119112,5cyclictest1977090-21kworker/u8:2+flush-179:023:05:010
19034069910696,7cyclictest1989061-21latency_hist23:35:011
19034069910493,7cyclictest1948944-21kworker/u8:0+flush-179:022:35:001
19034059910494,7cyclictest1959852-21latency_hist22:05:010
19034059910493,8cyclictest1914774-21latency_hist19:45:020
19034059910093,5cyclictest1919589-21kworker/u8:3+flush-179:020:00:230
1903405999890,6cyclictest1992290-21kworker/u8:3+flush-179:023:55:000
1903405999890,5cyclictest1948944-21kworker/u8:0+flush-179:022:30:150
1903406999780,13cyclictest1213033-21systemd-journal21:05:011
1903405999791,5cyclictest1906621-21kworker/u8:3+events_unbound19:40:000
1903405999690,5cyclictest2010096-21apt-get00:40:000
1903405999487,5cyclictest1985863-21kworker/u8:2+flush-179:023:35:230
1903405999387,4cyclictest1888834-21kworker/u8:0+flush-179:019:10:010
1903405999286,4cyclictest1930918-21kworker/u8:2+flush-179:020:55:220
1903405999282,7cyclictest1213033-21systemd-journal19:45:150
1903406999183,6cyclictest1931177-21/usr/sbin/munin20:35:231
1903406999179,9cyclictest1981086-21kworker/u8:0+flush-179:023:55:221
1903405999082,5cyclictest1985868-21kworker/u8:3+events_unbound23:30:010
1903405998982,4cyclictest1901820-21kworker/u8:1+flush-179:019:15:010
1903405998980,6cyclictest1967856-21latency_hist22:30:010
1903406998879,6cyclictest1966269-21latency_hist22:25:011
1903406998575,7cyclictest1919589-21kworker/u8:3+events_unbound20:19:591
1903406998477,5cyclictest1930918-21kworker/u8:2+flush-179:020:55:151
1903405998479,3cyclictest2001220-21kworker/u8:1+flush-179:000:15:010
1903405998276,5cyclictest1943937-21kworker/u8:1+flush-179:022:05:200
1903405998275,4cyclictest191rcuc/019:50:220
1903405998274,5cyclictest1950294-21latency_hist21:35:000
1903405998271,9cyclictest1908408-21latency_hist19:25:010
1903405998172,6cyclictest1981086-21kworker/u8:0+events_unbound23:10:150
1903406998074,4cyclictest1888834-21kworker/u8:0+events_unbound19:55:171
1903406998069,8cyclictest1943937-21kworker/u8:1+flush-179:021:25:201
1903406998069,8cyclictest1943937-21kworker/u8:1+flush-179:021:25:201
1903405998074,5cyclictest1930918-21kworker/u8:2+flush-179:021:10:150
1903405998074,4cyclictest1948944-21kworker/u8:0+events_unbound21:40:140
1903405998073,5cyclictest1888834-21kworker/u8:0+flush-179:019:15:260
1903406997969,7cyclictest1948944-21kworker/u8:0+events_unbound22:10:001
1903406997770,5cyclictest1925875-21kworker/u8:1+flush-179:020:25:241
1903405997771,5cyclictest1930920-21kworker/u8:3+flush-179:020:35:010
1903405997769,5cyclictest1985887-21latency_hist23:25:010
1903405997670,4cyclictest1992290-21kworker/u8:3+events_unbound00:20:000
1903406997566,7cyclictest1992290-21kworker/u8:3+flush-179:000:15:221
1903406997565,7cyclictest1985863-21kworker/u8:2+flush-179:023:40:011
1903405997564,9cyclictest1933044-21kworker/u8:0+events_unbound20:50:010
1903406997463,8cyclictest1984288-21latency_hist23:20:011
1903405997467,5cyclictest1930918-21kworker/u8:2+flush-179:021:20:210
1903405997466,5cyclictest1919589-21kworker/u8:3+events_unbound20:15:220
1903405997464,8cyclictest1922982-21apt-get20:10:130
1903405997364,6cyclictest1964674-21latency_hist22:20:000
1903405997267,4cyclictest1948944-21kworker/u8:0+flush-179:021:55:010
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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