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2026-04-28 - 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 100 highest latencies:
System rackbslot7.osadl.org (updated Tue Apr 28, 2026 12:44:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
22234991088,83cyclictest5757-21apt-get11:57:341
222349910855,48cyclictest22219-21cyclictest08:57:521
22241991056,58cyclictest39-21ksoftirqd/210:57:302
22234999939,10cyclictest0-21swapper/111:02:251
2223499992,35cyclictest17183-21unixbench_multi08:22:511
22234999730,12cyclictest0-21swapper/111:52:401
2223499972,38cyclictest20244-21tune2fs11:27:391
2223499964,35cyclictest32452-21latency_hist07:32:191
2223499964,35cyclictest32452-21latency_hist07:32:191
2223499963,37cyclictest4034-21grep07:42:521
2223499962,42cyclictest31112-21/usr/sbin/munin10:52:481
22234999533,12cyclictest0-21swapper/111:17:191
22234999529,12cyclictest0-21swapper/110:32:511
22234999529,12cyclictest0-21swapper/110:32:511
2066429556,16sleep2371rcuc/206:57:212
2223499944,39cyclictest24965-21kernelversion09:47:401
2223499943,37cyclictest14732-21cstates08:17:331
2223499943,33cyclictest27555-21latency_hist07:17:181
22234999433,12cyclictest0-21swapper/110:27:181
22234999429,12cyclictest0-21swapper/112:12:191
2223499942,40cyclictest18242-21latency_hist09:37:191
2223499942,36cyclictest24234-21modprobe09:47:151
2223499933,37cyclictest21677-21/usr/sbin/munin12:22:511
2223499933,34cyclictest30308-21latency_hist09:57:171
2223499933,34cyclictest30308-21latency_hist09:57:171
22234999330,11cyclictest0-21swapper/108:27:331
22234999330,11cyclictest0-21swapper/108:27:331
2223499932,39cyclictest13393-21latency08:12:411
22241999269,15cyclictest58-21kcompactd011:34:092
22234999236,10cyclictest0-21swapper/107:52:191
2223499923,39cyclictest9660-21latency_hist08:02:181
2223499923,39cyclictest9660-21latency_hist08:02:181
2223499923,35cyclictest6123-21date09:17:181
2223499923,35cyclictest6123-21date09:17:181
2223499923,35cyclictest13016-21/usr/sbin/munin09:27:491
22234999167,15cyclictest9760-21kernelversion09:22:431
22234999144,40cyclictest0-21swapper/112:04:331
2223499913,33cyclictest1464-21latency_hist07:37:171
22234999121,22cyclictest12224-21cat08:07:511
2223499903,36cyclictest4966-21awk10:07:501
2223499903,36cyclictest4966-21awk10:07:501
2223499903,35cyclictest28281-21grep07:17:481
2223499902,40cyclictest20407-21unixbench_multi08:32:501
2223499893,43cyclictest352-21runrttasks09:11:501
2223499893,37cyclictest26221-21fschecks_count11:37:361
2223499893,37cyclictest26221-21fschecks_count11:37:361
2223499892,35cyclictest23357-21latency08:42:431
22241998862,9cyclictest17474-21ssh11:22:432
2223499884,39cyclictest12788-21modprobe10:22:151
2223499884,36cyclictest22402-21fschecks_time10:37:381
2223499884,35cyclictest25484-21proc_pri08:48:561
22234998834,15cyclictest352-21runrttasks11:35:171
2223499883,36cyclictest28931-21/usr/sbin/munin11:42:311
22229998871,11cyclictest2374-21systemd-journal12:17:160
22229998865,16cyclictest32491-21latency_hist09:07:180
22229998865,16cyclictest32491-21latency_hist09:07:180
22229998854,17cyclictest19139-21ssh12:18:360
22229998854,17cyclictest19139-21ssh12:18:360
22241998768,12cyclictest298-21in:imuxsock10:17:332
2223499874,35cyclictest352-21runrttasks08:38:591
2223499874,33cyclictest17751-21/usr/sbin/munin12:17:381
2223499874,33cyclictest17751-21/usr/sbin/munin12:17:381
2223499873,34cyclictest943-21latency_hist10:02:181
2223499863,39cyclictest26458-21cpu08:52:311
2223499863,39cyclictest26458-21cpu08:52:311
2223499853,35cyclictest32218-21fschecks_count11:47:371
2223499853,35cyclictest32218-21fschecks_count11:47:371
2223499853,35cyclictest25105-21/usr/sbin/munin10:42:261
2223499853,35cyclictest25105-21/usr/sbin/munin10:42:261
2223499853,34cyclictest23901-21cstates12:27:331
2223499853,32cyclictest11499-21ssh11:12:441
22229998565,12cyclictest21542-21sh09:42:260
22229998563,15cyclictest22219-21cyclictest09:38:160
22229998554,13cyclictest1-21systemd09:27:170
2222999854,69cyclictest25156-21ssh10:42:310
2222999854,69cyclictest25156-21ssh10:42:310
22241998360,8cyclictest181rcu_preempt08:42:332
22241998335,25cyclictest22932-21kworker/u18:2-ext4-rsv-conversion11:07:502
2223499833,35cyclictest13906-21/usr/sbin/munin11:17:421
22241998263,13cyclictest16185-21latency_hist08:22:192
22241998256,9cyclictest181rcu_preempt08:27:162
2223499823,38cyclictest25980-21latency_hist07:12:191
22229998263,13cyclictest298-21in:imuxsock10:57:150
22229998259,16cyclictest22219-21cyclictest10:03:420
22241998164,8cyclictest181rcu_preempt10:32:182
22241998157,10cyclictest181rcu_preempt10:25:152
22229998158,15cyclictest29411-21diskmemload11:03:280
2222999813,53cyclictest15-21ksoftirqd/008:23:070
2222999811,24cyclictest25957-21ssh11:37:250
2222999811,24cyclictest25957-21ssh11:37:250
2224199802,67cyclictest21546-21apt-get09:42:402
2207828015,42sleep30-21swapper/307:02:163
22241997962,11cyclictest365-21ntpd09:02:332
22241997962,11cyclictest365-21ntpd09:02:332
22241997960,13cyclictest300-21rs:main2
22241997960,13cyclictest300-21rs:main2
22241997959,14cyclictest13361-21sh11:16:342
22241997959,14cyclictest13361-21sh11:16:342
22241997941,12cyclictest181rcu_preempt07:47:452
22241997936,8cyclictest0-21swapper/211:03:512
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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