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2026-08-27 - 16:32
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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 Thu Aug 27, 2026 12:44:58)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
343865799158124,22cyclictest3496852-21latency_hist10:10:011
343865799149138,8cyclictest1213033-21systemd-journal07:20:011
343865399140132,5cyclictest3458434-21kworker/u8:4+flush-179:008:50:010
343865399130119,8cyclictest3517795-21latency_hist11:15:010
343865799129118,8cyclictest3485707-21latency_hist09:35:021
343865399120105,12cyclictest3441890-21apt-get07:20:000
343865799119111,5cyclictest3441945-21kworker/u8:0+events_unbound08:00:251
343865799119105,11cyclictest1213033-21systemd-journal12:25:001
343865799119105,11cyclictest1213033-21systemd-journal12:25:001
343865799118107,8cyclictest3455208-21latency_hist08:00:011
343865399116106,7cyclictest3458399-21latency_hist08:10:010
343865799115104,8cyclictest3488900-21latency_hist09:45:011
343865399112103,5cyclictest3522273-21kworker/u8:0+events_unbound12:00:010
343865399112103,5cyclictest3522273-21kworker/u8:0+events_unbound12:00:010
34386539911181,19cyclictest1213033-21systemd-journal11:05:010
343865799110101,6cyclictest3453618-21latency_hist07:55:011
34386579910999,7cyclictest3443735-21latency_hist07:25:011
34386579910494,7cyclictest3523840-21journal-offline11:30:201
34386539910391,9cyclictest3521002-21apt-get11:25:000
34386539910292,7cyclictest1213033-21systemd-journal10:45:010
34386539910290,9cyclictest3472717-21latency_hist08:55:000
34386579910192,6cyclictest3504787-21kworker/u8:2+flush-179:010:45:161
34386579910091,7cyclictest3450452-21latency_hist07:45:011
34386579910086,11cyclictest1213033-21systemd-journal11:00:011
34386539910095,3cyclictest3504787-21kworker/u8:2+flush-179:010:55:230
3438657999990,6cyclictest3531027-21/usr/sbin/munin11:55:241
3438657999990,6cyclictest3531027-21/usr/sbin/munin11:55:231
3438657999790,5cyclictest3537148-21kworker/u8:0+flush-179:012:30:171
3438657999385,6cyclictest3477733-21kworker/u8:1+flush-179:009:35:161
3438657999385,6cyclictest3477733-21kworker/u8:1+flush-179:009:35:151
3438657999382,8cyclictest3458657-21apt-get08:10:091
3438657999285,5cyclictest3541937-21latency_hist12:30:011
3438657999282,7cyclictest3527618-21latency_hist11:45:011
3438653999282,7cyclictest3432302-21kworker/u8:1+events_unbound07:20:020
3438657999180,8cyclictest3535560-21kworker/u8:2+flush-179:012:10:211
3438653999083,6cyclictest3481737-21kworker/u8:2+flush-179:010:05:240
3438657998981,6cyclictest3458377-21kworker/u8:2+flush-179:008:20:211
3438657998974,12cyclictest1213033-21systemd-journal10:20:001
3438657998875,11cyclictest3458434-21kworker/u8:4+events_unbound08:50:251
3438657998780,4cyclictest3494703-21kworker/u8:1+flush-179:010:00:221
3438657998780,4cyclictest3494703-21kworker/u8:1+flush-179:010:00:211
3438657998779,6cyclictest3498470-21kworker/u8:3+flush-179:010:20:231
3438657998779,5cyclictest3432302-21kworker/u8:1+flush-179:007:25:221
3438657998681,4cyclictest3432302-21kworker/u8:1+flush-179:008:05:261
3438657998676,7cyclictest3438408-21latency_hist07:10:021
3438657998581,3cyclictest3515668-21kworker/u8:0+events_unbound11:05:231
3438657998577,6cyclictest3441945-21kworker/u8:0+flush-179:007:50:001
3438653998574,8cyclictest3519456-21kworker/u8:3+flush-179:011:25:020
3438657998477,5cyclictest3519456-21kworker/u8:3+events_unbound11:45:251
3438657998460,21cyclictest3534240-21apt-get12:05:111
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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