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2026-04-26 - 21:04
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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 Sun Apr 26, 2026 12:44:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
737299974,26cyclictest31096-21rm11:17:381
70982979,60sleep17099-21sshd07:01:061
737299964,41cyclictest21831-21grep07:43:011
736399963,41cyclictest1641-21ssh11:22:370
7380999512,71cyclictest32411-21apt-get12:12:382
7372999440,44cyclictest0-21swapper/111:52:501
738099933,71cyclictest417-21apt-get09:32:482
737299915,30cyclictest30048-21/usr/sbin/munin09:27:501
7372999067,15cyclictest277-21dbus-daemon08:22:241
7372999047,36cyclictest31154-21processes10:22:561
737299904,41cyclictest7868-21apt-get11:32:351
737299903,40cyclictest352-21runrttasks10:50:381
737299892,42cyclictest12564-21idleruntime-cro07:17:231
737299892,42cyclictest12564-21idleruntime-cro07:17:231
7363998971,14cyclictest17190-21kworker/u18:3+events_unbound11:52:230
7363998971,14cyclictest17190-21kworker/u18:3+events_unbound11:52:230
736399893,75cyclictest500-21rm09:32:480
7380998864,14cyclictest27845-21kworker/u17:3-rpciod10:02:582
7380998864,14cyclictest27845-21kworker/u17:3-rpciod10:02:582
7372998871,11cyclictest352-21runrttasks12:23:001
737299885,40cyclictest15180-21sshd11:49:051
737299885,40cyclictest15180-21sshd11:49:051
7372998841,39cyclictest0-21swapper/109:42:561
7372998841,39cyclictest0-21swapper/109:42:561
7372998838,43cyclictest0-21swapper/111:23:011
737299883,35cyclictest28691-21latency_hist08:07:261
737299883,31cyclictest22524-21latency11:02:491
737299882,28cyclictest13117-21sh09:52:551
7363998868,14cyclictest352-21runrttasks07:07:260
7380998766,15cyclictest7303-21latency_hist11:32:262
7372998741,39cyclictest17911-21sh09:07:481
7372998738,42cyclictest0-21swapper/110:32:541
737299873,34cyclictest7019-21/usr/sbin/munin10:37:471
737299873,32cyclictest352-21runrttasks12:17:411
737299873,32cyclictest23394-21grep07:48:001
737299873,28cyclictest26590-21/usr/sbin/munin09:22:531
7363998759,20cyclictest23826-21processes11:57:560
7372998646,17cyclictest181rcu_preempt12:07:361
7372998646,17cyclictest181rcu_preempt12:07:361
737299863,37cyclictest352-21runrttasks10:46:041
737299863,31cyclictest16565-21latency_hist11:47:271
737299863,30cyclictest25032-21/usr/sbin/munin11:07:411
737299863,27cyclictest26353-21latency_hist09:22:261
737299863,27cyclictest26353-21latency_hist09:22:261
7372998627,51cyclictest0-21swapper/108:47:461
7363998643,11cyclictest181rcu_preempt12:27:250
7380998569,10cyclictest277-21dbus-daemon11:42:242
7380998569,10cyclictest277-21dbus-daemon11:42:242
7380998517,57cyclictest8050-21taskset11:33:022
737299854,39cyclictest18741-21latency_hist10:57:261
737299854,29cyclictest7791-21modprobe08:42:231
737299854,29cyclictest7791-21modprobe08:42:231
7372998535,43cyclictest0-21swapper/111:42:491
737299853,37cyclictest9297-21runrttasks08:46:071
737299853,32cyclictest352-21runrttasks09:03:061
737299853,31cyclictest5424-21ps08:32:561
737299853,31cyclictest5424-21ps08:32:561
737299853,30cyclictest11268-21fschecks_time11:37:591
737299853,30cyclictest11268-21fschecks_time11:37:591
737299853,28cyclictest25812-21ssh12:02:221
7372998531,44cyclictest24623-21ntp_kernel_pll_07:52:521
7372998531,44cyclictest24623-21ntp_kernel_pll_07:52:521
737299852,30cyclictest21733-21modprobe11:02:221
7363998566,10cyclictest16612-21/usr/sbin/munin11:47:230
7363998566,10cyclictest16612-21/usr/sbin/munin11:47:230
7363998564,15cyclictest32743-21ssh12:13:300
7363998553,13cyclictest181rcu_preempt09:41:250
7372998438,38cyclictest0-21swapper/110:17:531
737299843,33cyclictest31362-21timerandwakeup08:12:591
737299843,33cyclictest31362-21timerandwakeup08:12:591
737299843,33cyclictest15910-21latency09:57:501
737299843,33cyclictest1215-21kernelversion09:33:501
737299843,29cyclictest12073-21timerandwakeup08:52:561
7372998429,41cyclictest0-21swapper/110:12:541
7372998429,41cyclictest0-21swapper/110:12:541
737299842,34cyclictest352-21runrttasks08:09:191
737299842,34cyclictest352-21runrttasks08:09:191
737299842,32cyclictest10390-21sed07:08:021
737299842,30cyclictest12352-21latency_hist09:52:271
7363998453,10cyclictest181rcu_preempt09:43:160
7363998453,10cyclictest181rcu_preempt09:43:160
7363998444,11cyclictest0-21swapper/008:23:390
7380998359,18cyclictest1093-21latency_hist08:22:252
737299834,39cyclictest27226-21latency_hist08:02:261
737299833,34cyclictest19184-21latency_hist07:37:271
737299833,33cyclictest13031-21fschecks_count07:17:471
737299833,33cyclictest13031-21fschecks_count07:17:471
737299833,29cyclictest20876-21fschecks_count09:12:461
737299833,28cyclictest27199-21grep12:03:011
737299832,29cyclictest4683-21latency_hist08:32:271
738099822,62cyclictest17201-21ssh11:47:472
738099822,62cyclictest17201-21ssh11:47:472
737299825,29cyclictest352-21runrttasks08:57:511
737299825,29cyclictest352-21runrttasks08:57:511
737299824,32cyclictest28403-21fschecks_time11:12:471
737299823,32cyclictest32388-21ssh12:12:341
737299823,31cyclictest7519-21/usr/sbin/munin07:02:481
737299823,31cyclictest3966-21latency_hist10:32:271
737299823,31cyclictest1893-21fschecks_time08:23:301
737299823,30cyclictest19471-21ssh10:03:001
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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