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2026-05-27 - 22:30
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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 Wed May 27, 2026 12:44:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
124278799126105,18cyclictest1286067-21latency_hist09:25:021
124278799122107,10cyclictest1213033-21systemd-journal08:00:001
124278399115105,6cyclictest1334809-21kworker/u8:0+events_unbound12:00:010
124278799110100,8cyclictest1213033-21systemd-journal09:34:591
124278799108100,6cyclictest1257150-21latency_hist07:55:021
12427879910596,7cyclictest1274661-21latency_hist08:50:011
12427839910597,5cyclictest1305408-21kworker/u8:1+flush-179:010:40:020
12427879910189,9cyclictest1213033-21systemd-journal12:30:001
12427879910091,6cyclictest1252381-21latency_hist07:40:011
1242787999991,5cyclictest1329557-21latency_hist11:40:011
1242783999588,5cyclictest1300676-21kworker/u8:3+events_unbound10:10:210
1242783999580,11cyclictest1308604-21apt-get10:35:000
1242787999484,7cyclictest1268297-21latency_hist08:30:011
1242783999387,4cyclictest1313666-21kworker/u8:2+events_unbound10:50:000
1242783999379,10cyclictest1213033-21systemd-journal08:15:000
1242787999286,4cyclictest1294310-21kworker/u8:0+flush-179:009:55:251
1242787999084,4cyclictest1312028-21kworker/u8:0+events_unbound11:05:011
1242787998882,4cyclictest1245312-21kworker/u8:1+flush-179:009:45:151
1242783998882,4cyclictest1245312-21kworker/u8:1+flush-179:007:55:260
1242787998782,4cyclictest1305408-21kworker/u8:1+flush-179:010:35:011
1242787998779,6cyclictest1327930-21kworker/u8:2+events_unbound12:35:001
1242787998681,4cyclictest1242731-21kworker/u8:2+flush-179:007:15:141
1242787998668,15cyclictest1289735-21kworker/u8:2+flush-179:010:00:111
1242787998579,5cyclictest1312028-21kworker/u8:0+events_unbound11:15:001
1242787998479,3cyclictest1294310-21kworker/u8:0+events_unbound10:25:241
1242787998476,6cyclictest1327930-21kworker/u8:2+flush-179:011:55:241
1242787998276,4cyclictest1342804-21apt-get12:20:111
1242787998272,7cyclictest1287913-21latency_hist09:30:011
1242787998270,9cyclictest1213033-21systemd-journal10:10:001
1242783998273,6cyclictest1312028-21kworker/u8:0+flush-179:010:55:260
1242787998072,6cyclictest1300676-21kworker/u8:3+flush-179:010:20:211
1242787998071,5cyclictest1294310-21kworker/u8:0+flush-179:010:15:231
1242787997974,4cyclictest1258793-21kworker/u8:2+flush-179:008:14:561
1242783997872,4cyclictest1269878-21kworker/u8:2+flush-179:008:35:160
1242783997872,4cyclictest1269878-21kworker/u8:2+flush-179:008:35:160
1242783997871,4cyclictest1245312-21kworker/u8:1+flush-179:007:50:010
1242787997771,4cyclictest1245312-21kworker/u8:1+flush-179:009:50:241
1242787997767,9cyclictest1245312-21kworker/u8:1+flush-179:009:39:551
1242783997767,7cyclictest1276248-21latency_hist08:55:010
1242783997767,7cyclictest1250689-21latency_hist07:35:010
1242783997667,6cyclictest1312046-21latency_hist10:45:010
1242787997568,5cyclictest1312301-21apt-get10:45:101
1242783997567,5cyclictest1312028-21kworker/u8:0+flush-179:011:20:200
1242787997468,4cyclictest584833-21kworker/u8:0+flush-179:007:20:141
1242787997468,4cyclictest1282907-21kworker/u8:2+flush-179:009:15:241
1242787997465,7cyclictest1245312-21kworker/u8:1+flush-179:008:15:201
1242787997463,9cyclictest1318667-21apt-get11:05:091
1242783997468,5cyclictest1263750-21kworker/u8:0+flush-179:008:25:230
1242783997467,5cyclictest1269885-21latency_hist08:35:010
1242783997464,7cyclictest1339355-21latency_hist12:10:010
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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