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2026-06-15 - 12:35
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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 Mon Jun 15, 2026 00:44:53)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
135872199142132,6cyclictest1420048-21latency_hist22:20:010
135872399130119,8cyclictest1464107-21latency_hist00:35:011
135872199128117,8cyclictest1213033-21systemd-journal23:40:010
135872199128117,8cyclictest1213033-21systemd-journal20:50:000
135872399126114,8cyclictest1460926-21latency_hist00:25:001
135872199124109,12cyclictest1213033-21systemd-journal19:50:010
135872399116106,7cyclictest1410230-21latency_hist21:50:011
135872399115104,7cyclictest1373056-21latency_hist19:55:011
135872199115106,6cyclictest1403865-21latency_hist21:30:000
13587219910999,8cyclictest1368281-21latency_hist19:40:010
135872199108100,5cyclictest1395378-21kworker/u8:2+flush-179:021:15:230
13587239910798,6cyclictest1363524-21latency_hist19:25:011
13587239910696,7cyclictest1360324-21latency_hist19:15:011
13587239910695,7cyclictest1408646-21latency_hist21:45:001
13587239910593,9cyclictest1449459-21kworker/u8:0+flush-179:000:00:011
13587219910596,7cyclictest1429588-21latency_hist22:50:010
13587219910594,8cyclictest1413681-21latency_hist22:00:020
13587219910492,9cyclictest1402021-21latency_hist21:25:010
13587219910092,5cyclictest1384303-21kworker/u8:1+flush-179:020:50:170
1358723999989,7cyclictest510-21rs:main1
1358721999685,8cyclictest1341276-21kworker/u8:2+flush-179:019:30:010
1358721999685,8cyclictest1341276-21kworker/u8:2+flush-179:019:30:010
1358723999380,9cyclictest1213033-21systemd-journal00:20:011
1358721999384,7cyclictest1428003-21latency_hist22:45:020
1358723999183,5cyclictest1393796-21latency_hist21:00:011
1358721999184,4cyclictest1447357-21latency_hist23:45:000
1358721999179,9cyclictest1213033-21systemd-journal23:30:000
135872199911,88cyclictest1-21systemd00:03:590
1358723999085,4cyclictest1455878-21kworker/u8:1+flush-179:000:10:251
1358721998982,4cyclictest1406114-21kworker/u8:0+flush-179:022:10:220
1358721998881,5cyclictest1447593-21kworker/u8:2+events_unbound00:00:010
1358721998879,6cyclictest1427439-21kworker/u8:0+flush-179:022:55:160
1358721998674,9cyclictest1431187-21apt-get22:55:000
1358723998373,7cyclictest1213033-21systemd-journal20:35:001
1358723998371,10cyclictest1379727-21apt-get20:15:131
1358723998371,10cyclictest1379727-21apt-get20:15:131
1358721998375,6cyclictest1398567-21latency_hist21:15:010
1358721998273,7cyclictest1447593-21kworker/u8:2+flush-179:000:20:240
1358721998272,8cyclictest1381338-21apt-get20:20:120
1358723998175,5cyclictest1393770-21kworker/u8:0+flush-179:021:15:011
1358723998171,8cyclictest1373310-21apt-get19:55:121
1358723998170,8cyclictest1376304-21latency_hist20:05:011
1358723998073,5cyclictest1462746-21kworker/u8:1+flush-179:000:35:261
1358723998069,9cyclictest1213033-21systemd-journal19:20:011
1358723997969,7cyclictest1449380-21cat23:50:011
1358723997869,7cyclictest1404121-21apt-get21:30:121
1358721997771,4cyclictest1381118-21kworker/u8:2+flush-179:020:35:230
1358723997667,7cyclictest1213033-21systemd-journal22:26:311
1358721997566,7cyclictest1437777-21kworker/u8:0+flush-179:023:30:210
1358721997564,8cyclictest1410727-21kworker/u8:3+flush-179:021:50:230
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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