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2026-05-22 - 10:10
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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 100 highest latencies:
System rackbslot7.osadl.org (updated Fri May 22, 2026 00:44:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3037421237,74sleep230375-21cpu18:56:002
3037421237,74sleep230375-21cpu18:56:002
30587211513,64sleep130646-21tune2fs18:56:281
30587211513,64sleep130646-21tune2fs18:56:281
3158321066,16sleep00-21swapper/018:59:200
3158321066,16sleep00-21swapper/018:59:200
31845999361,23cyclictest8156-21ssh21:56:382
31845999361,23cyclictest8156-21ssh21:56:382
223552910,7sleep222360-21unixbench_multi20:06:172
31845999051,10cyclictest181rcu_preempt23:03:552
31840999040,38cyclictest22760-21apt-get23:15:541
31840998827,23cyclictest0-21swapper/123:35:441
31840998827,23cyclictest0-21swapper/123:35:441
31835998565,13cyclictest297-21systemd-logind23:25:420
31845998463,15cyclictest11227-21ntp_kernel_err22:01:102
31845998263,9cyclictest0-21swapper/200:06:152
31845998161,13cyclictest0-21swapper/220:31:132
31845998158,14cyclictest7243-21cron21:55:412
31840998161,10cyclictest0-21swapper/119:56:291
31840998161,10cyclictest0-21swapper/119:56:291
31835998157,16cyclictest7778-21apt-get21:56:240
31835998157,16cyclictest7778-21apt-get21:56:240
31835998133,42cyclictest14089-21grep19:41:290
31845998059,14cyclictest31133-21kworker/u17:0-xprtiod23:46:172
31845998059,14cyclictest31133-21kworker/u17:0-xprtiod23:46:172
31835998047,26cyclictest0-21swapper/000:00:400
31835998047,26cyclictest0-21swapper/000:00:400
31845997963,9cyclictest0-21swapper/222:41:062
31845997961,11cyclictest0-21swapper/222:06:032
31845997954,15cyclictest0-21swapper/220:16:072
31845997948,22cyclictest20070-21cut20:01:022
31835997948,21cyclictest29546-21apt-get20:30:550
31845997862,9cyclictest0-21swapper/200:11:172
31845997862,9cyclictest0-21swapper/200:11:172
31840997863,8cyclictest0-21swapper/121:21:081
31840997859,13cyclictest19275-21munin-plugin-st22:15:411
31840997859,13cyclictest19275-21munin-plugin-st22:15:411
31840997857,15cyclictest544-21cron21:15:411
31840997857,10cyclictest0-21swapper/120:25:451
31835997845,23cyclictest5405-21apt-get20:55:520
31835997844,26cyclictest4562-21apt-get21:50:550
31835997836,30cyclictest17057-21ssh22:11:070
31835997836,30cyclictest17057-21ssh22:11:070
31835997829,38cyclictest29680-21ls00:21:080
31840997757,10cyclictest0-21swapper/120:11:011
31840997724,22cyclictest0-21swapper/119:23:461
31845997659,12cyclictest0-21swapper/221:16:102
31845997659,12cyclictest0-21swapper/221:16:102
31845997659,11cyclictest0-21swapper/221:36:172
31845997659,11cyclictest0-21swapper/221:36:172
31845997659,10cyclictest0-21swapper/219:51:172
31845997648,18cyclictest13123-21ssh22:59:332
31840997656,9cyclictest0-21swapper/121:20:441
31840997656,9cyclictest0-21swapper/121:20:441
31840997654,14cyclictest0-21swapper/121:55:461
31840997646,24cyclictest16962-21grep19:51:121
31835997649,19cyclictest16582-21fschecks_count19:51:010
31835997648,22cyclictest10883-21apt-get22:55:560
31835997626,28cyclictest14090-21grep21:11:180
31835997617,18cyclictest24222-21runrttasks22:22:560
31835997617,18cyclictest24222-21runrttasks22:22:560
31845997558,10cyclictest0-21swapper/220:46:152
31845997555,11cyclictest0-21swapper/219:21:172
31845997549,17cyclictest26506-21unixbench_multi22:26:192
31840997555,14cyclictest8019-21ssh21:01:181
31835997554,14cyclictest352-21runrttasks20:16:070
31835997553,16cyclictest28945-21sh00:20:420
31835997548,20cyclictest352-21runrttasks23:43:110
31835997542,26cyclictest0-21swapper/021:40:520
31835997516,23cyclictest0-21swapper/021:25:190
3184999746,53cyclictest13378-21chrt21:11:033
3184999743,57cyclictest12871-21taskset22:04:273
3184999743,55cyclictest21007-21taskset20:03:303
3184999742,42cyclictest19419-21taskset21:21:053
31845997458,9cyclictest0-21swapper/219:11:312
31845997458,10cyclictest16970-21latency_hist00:00:442
31845997458,10cyclictest16970-21latency_hist00:00:442
31845997458,10cyclictest0-21swapper/223:06:072
31845997458,10cyclictest0-21swapper/220:21:062
31845997457,11cyclictest19153-21kworker/u17:2-xprtiod22:18:402
31845997455,13cyclictest2396-21fschecks_count23:36:022
31845997450,15cyclictest20240-21latency23:11:072
31845997450,15cyclictest20240-21latency23:11:072
31845997439,7cyclictest181rcu_preempt19:45:432
31840997458,7cyclictest0-21swapper/121:36:141
31840997458,7cyclictest0-21swapper/121:36:141
31835997445,20cyclictest1634-21cron22:40:400
31835997443,21cyclictest19813-21latency_hist20:00:450
3184999733,57cyclictest30768-21taskset00:22:353
3184999733,34cyclictest15947-21chrt23:04:103
31845997358,10cyclictest0-21swapper/219:31:112
31845997356,9cyclictest0-21swapper/219:26:022
31845997356,9cyclictest0-21swapper/219:26:022
31845997341,11cyclictest181rcu_preempt21:35:432
31840997355,11cyclictest277-21dbus-daemon00:10:421
31840997353,14cyclictest10287-21forks21:06:041
31840997350,16cyclictest0-21swapper/100:20:421
31835997347,18cyclictest9962-21fschecks_time19:31:020
3184999724,54cyclictest2940-21taskset19:10:413
3184999723,54cyclictest17145-21chrt22:11:083
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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