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2026-03-13 - 06:18
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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 Fri Mar 13, 2026 00:44:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
21722799910493,6cyclictest2215941-21kworker/u8:3+events_unbound21:40:230
2172282999285,5cyclictest2277222-21apt-get00:35:041
2172279999280,9cyclictest266-21systemd-journal00:35:200
2172279998879,6cyclictest2225442-21latency_hist21:55:010
2172282998678,6cyclictest2222272-21latency_hist21:45:011
2172279998578,5cyclictest2180097-21kworker/u8:1+events_unbound19:40:250
2172282998474,8cyclictest2241345-21kworker/u8:1+flush-179:022:45:001
2172282998375,6cyclictest2244537-21latency_hist22:55:011
2172282998173,6cyclictest2255977-21kworker/u8:3+events_unbound23:30:011
2172282998173,6cyclictest2255977-21kworker/u8:3+events_unbound23:30:011
2172279997975,3cyclictest2272450-21kworker/u8:3+events_unbound00:25:220
2172279997970,6cyclictest2266009-21latency_hist00:00:010
217227999791,76cyclictest2267619-21systemd00:04:000
2172279997868,3cyclictest2196280-21kworker/u8:2+events_unbound20:33:220
2172279997868,3cyclictest2196280-21kworker/u8:2+events_unbound20:33:220
2172282997672,3cyclictest2196280-21kworker/u8:2+flush-179:020:45:221
2172279997671,4cyclictest2254340-21kworker/u8:2+events_unbound23:25:250
2172279997671,4cyclictest2254340-21kworker/u8:2+events_unbound23:25:240
2172279997671,4cyclictest2233462-21kworker/u8:2+events_unbound22:40:230
2172279997667,6cyclictest2233419-21latency_hist22:20:010
2172279997571,3cyclictest2269248-21kworker/u8:0+events_unbound00:14:550
2172279997571,3cyclictest2254340-21kworker/u8:2+events_unbound23:44:550
2172279997563,9cyclictest266-21systemd-journal19:50:000
2172282997465,7cyclictest2233655-21/usr/sbin/munin22:20:231
2172282997462,9cyclictest2277222-21apt-get00:35:001
2172282997367,4cyclictest2191236-21kworker/u8:0+flush-179:020:20:151
2172282997268,3cyclictest2241345-21kworker/u8:1+flush-179:022:49:541
2172282997264,5cyclictest2244518-21kworker/u8:2+events_unbound23:10:151
2172282997262,8cyclictest2274267-21/usr/sbin/munin00:25:271
2172282997249,21cyclictest2215941-21kworker/u8:3+flush-179:022:05:011
2172282997164,5cyclictest2242932-21kworker/u8:0+flush-179:023:20:001
2172279997159,9cyclictest266-21systemd-journal21:32:400
2172279997065,4cyclictest2215941-21kworker/u8:3+events_unbound22:20:230
2172279997065,4cyclictest2211105-21kworker/u8:1+events_unbound21:10:240
2172282996965,3cyclictest2180097-21kworker/u8:1+flush-179:019:55:251
2172279996962,5cyclictest2227062-21latency_hist22:00:000
2172279996958,4cyclictest2236634-21kworker/u8:0+events_unbound22:33:210
2172282996861,5cyclictest2220731-21kworker/u8:2+flush-179:021:50:241
2172279996863,4cyclictest2233462-21kworker/u8:2+events_unbound22:25:240
2172282996760,5cyclictest2194664-21kworker/u8:1+flush-179:020:20:001
2172279996762,4cyclictest2225487-21kworker/u8:0+events_unbound22:12:210
2172279996762,4cyclictest2225487-21kworker/u8:0+events_unbound22:12:200
2172279996760,5cyclictest2259376-21latency_hist23:40:000
2172279996661,4cyclictest2194664-21kworker/u8:1+events_unbound20:25:180
217228299651,2cyclictest714-21Xorg19:27:591
2172279996560,4cyclictest2212690-21kworker/u8:0+events_unbound21:24:210
2172279996560,4cyclictest2196280-21kworker/u8:2+events_unbound20:35:290
2172279996560,4cyclictest2191236-21kworker/u8:0+events_unbound20:20:200
2172279996554,9cyclictest2178785-21apt-get19:30:120
2172279996460,3cyclictest2262805-21kworker/u8:3+events_unbound23:49:560
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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