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2025-11-29 - 15:40
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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 Sat Nov 29, 2025 00:44:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3181506999988,7cyclictest3287898-21latency_hist00:40:011
3181505998978,9cyclictest1-21systemd00:20:010
3181506998774,10cyclictest3274855-40mandb00:00:011
3181505998172,7cyclictest3240645-21latency_hist22:15:020
3181506998075,3cyclictest3255453-21kworker/u8:0+flush-179:023:00:261
3181505998070,7cyclictest3186249-21latency_hist19:25:010
3181505997872,4cyclictest3255454-21kworker/u8:2+flush-179:023:00:000
3181506997672,3cyclictest3267929-21kworker/u8:0+flush-179:023:40:251
3181506997666,8cyclictest3183291-21/usr/sbin/munin19:15:231
3181506997666,8cyclictest3183291-21/usr/sbin/munin19:15:231
3181505997667,7cyclictest3278083-21latency_hist00:10:010
3181506997569,4cyclictest3205324-21kworker/u8:0+flush-179:020:35:261
3181506997563,9cyclictest3227921-21latency_hist21:35:021
3181505997060,7cyclictest3218384-21latency_hist21:05:010
3181505996859,6cyclictest3267929-21kworker/u8:0+flush-179:023:40:010
3181506996558,5cyclictest3197349-21kworker/u8:0+flush-179:020:00:231
3181506996558,5cyclictest3197349-21kworker/u8:0+flush-179:020:00:221
3181505996558,6cyclictest3179520-21kworker/u8:0+flush-179:019:20:010
3181505996558,6cyclictest3179520-21kworker/u8:0+flush-179:019:20:000
3181506996453,8cyclictest3237476-21latency_hist22:05:011
3181505996458,5cyclictest3276484-21kworker/u8:4+flush-179:000:25:000
3181505996357,4cyclictest3274816-21kworker/u8:0+events_unbound00:00:140
3181507996259,2cyclictest0-21swapper/221:46:002
3181507996259,2cyclictest0-21swapper/221:45:592
3181506996250,9cyclictest3265035-21latency_hist23:30:011
3181506996249,8cyclictest271-21systemd-journal00:20:011
318150599620,1cyclictest0-21swapper/021:55:590
3181505996155,4cyclictest3276484-21kworker/u8:4+flush-179:000:39:540
3181505996152,7cyclictest3260255-21latency_hist23:15:010
3181506996055,4cyclictest3189398-21kworker/u8:2+flush-179:019:50:261
3181505995953,5cyclictest3226368-21kworker/u8:0+flush-179:021:50:250
3181505995953,4cyclictest3261007-21kworker/u8:1+events_unbound23:30:240
3181505995850,6cyclictest3197349-21kworker/u8:0+flush-179:020:10:210
3181507995754,2cyclictest0-21swapper/200:16:002
3181505995750,5cyclictest3208526-21apt-get20:35:010
3181505995748,6cyclictest3284708-21latency_hist00:30:010
3181505995747,7cyclictest3248627-21latency_hist22:40:010
3181505995747,4cyclictest3213640-21kworker/u8:2+events_unbound21:05:230
3181505995744,11cyclictest3274855-40mandb00:00:010
3181506995650,5cyclictest3250442-21kworker/u8:1+events_unbound22:45:231
3181506995650,4cyclictest3215447-21apt-get20:55:131
3181505995652,3cyclictest3261007-21kworker/u8:1+flush-179:023:25:170
3181505995649,3cyclictest3276484-21kworker/u8:4+flush-179:000:10:170
3181505995644,11cyclictest3184118-21kworker/u8:1+flush-179:019:25:210
3181505995548,5cyclictest3255453-21kworker/u8:0+flush-179:023:00:210
3181505995443,8cyclictest3216781-21latency_hist21:00:000
3181505995439,4cyclictest3212258-21kworker/u8:1+flush-179:021:20:000
3181506995351,1cyclictest0-21swapper/119:46:581
3181506995345,6cyclictest3202386-21kworker/u8:1+flush-179:020:15:231
3181506995344,6cyclictest3187834-21latency_hist19:30:001
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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