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2026-06-27 - 16:05
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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 Sat Jun 27, 2026 12:44:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1730021590,10sleep3451rcuc/306:53:393
17610214511,96sleep017658-21grep06:53:540
185139912638,63cyclictest6880-21apt-get10:13:550
18513991225,94cyclictest11647-21apt-get08:13:280
185139911537,14cyclictest0-21swapper/012:23:300
185139911537,14cyclictest0-21swapper/012:23:300
185139911237,12cyclictest0-21swapper/011:18:350
185139911237,12cyclictest0-21swapper/011:18:350
18419211123,55sleep218382-21/usr/sbin/munin06:58:162
18513991083,25cyclictest16158-21apt-get11:23:330
18513991073,45cyclictest24572-21latency_hist11:38:140
18513991073,45cyclictest24572-21latency_hist11:38:140
18513991053,31cyclictest24803-21/usr/sbin/munin10:43:350
18513991053,31cyclictest15139-21df_inode09:33:330
185139910472,23cyclictest13382-21latency_hist12:13:180
185139910472,23cyclictest13382-21latency_hist12:13:180
185139910472,23cyclictest13382-21latency_hist12:13:180
18513991046,46cyclictest8109-21apt-get08:03:340
185349910361,12cyclictest13093-21kworker/u18:2-rpciod10:29:172
1786021029,60sleep117952-21unixbench_multi06:53:591
1851399996,48cyclictest16637-21apt-get12:18:300
18513999545,8cyclictest2640-21kworker/u17:1+rpciod11:13:210
18534999360,8cyclictest181rcu_preempt10:58:092
1852499933,33cyclictest31-21ksoftirqd/107:23:261
18534999271,15cyclictest2563-21latency_hist09:13:152
18534999052,8cyclictest181rcu_preempt10:00:302
18534998949,8cyclictest181rcu_preempt07:58:252
18513998925,35cyclictest7749-21uname11:08:470
18534998855,12cyclictest181rcu_preempt07:18:162
18534998855,12cyclictest181rcu_preempt07:18:162
18534998754,16cyclictest181rcu_preempt10:38:362
18534998753,8cyclictest181rcu_preempt12:18:432
18524998664,10cyclictest0-21swapper/110:18:471
1851399854,60cyclictest14840-21kworker/u19:2+ext4-rsv-conversion11:43:280
1851399854,60cyclictest14840-21kworker/u19:2+ext4-rsv-conversion11:43:280
18534998462,9cyclictest181rcu_preempt10:18:012
1852499843,33cyclictest31-21ksoftirqd/110:53:251
18513998463,15cyclictest30425-21cpu07:33:280
1854399839,46cyclictest116532sleep308:13:283
18524998336,8cyclictest181rcu_preempt12:13:291
18524998336,8cyclictest181rcu_preempt12:13:291
1851399833,24cyclictest4635-21apt-get11:58:270
18534998147,7cyclictest181rcu_preempt08:18:152
18524998155,10cyclictest22679-21ssh09:45:441
18524998155,10cyclictest22679-21ssh09:45:441
18524998136,10cyclictest181rcu_preempt11:12:121
18513998148,12cyclictest374-21kworker/u17:1-ext4-rsv-conversion07:18:160
18513998148,12cyclictest374-21kworker/u17:1-ext4-rsv-conversion07:18:160
232832800,3sleep0211rcuc/008:48:360
18534998044,9cyclictest181rcu_preempt09:22:312
18534998044,9cyclictest181rcu_preempt09:22:312
18534997960,13cyclictest22322-21latency_hist12:28:152
18534997960,13cyclictest22322-21latency_hist12:28:152
18524997938,9cyclictest181rcu_preempt10:11:151
18524997937,8cyclictest181rcu_preempt10:30:401
18534997841,10cyclictest15293-21latency08:23:402
18534997818,14cyclictest371rcuc/210:18:262
18524997863,8cyclictest0-21swapper/109:53:141
18524997860,12cyclictest2374-21systemd-journal11:58:151
18524997858,12cyclictest19220-21systemd-run12:23:131
18524997857,14cyclictest2374-21systemd-journal06:58:361
18524997855,9cyclictest181rcu_preempt09:20:501
18524997855,9cyclictest181rcu_preempt09:20:501
18524997840,9cyclictest22989-21ssh10:39:431
18524997834,9cyclictest181rcu_preempt10:03:511
18513997852,17cyclictest544-21cron09:28:120
1851399783,33cyclictest352-21runrttasks10:22:010
1851399782,41cyclictest29570-21apt-get09:58:290
18534997761,9cyclictest17686-21kworker/u17:3-xprtiod09:53:162
18534997761,9cyclictest17686-21kworker/u17:3-xprtiod09:53:162
18534997756,14cyclictest28018-21latency10:48:382
18534997756,14cyclictest28018-21latency10:48:382
18534997754,7cyclictest181rcu_preempt09:33:582
18534997752,9cyclictest8581-21ssh11:10:062
18524997737,8cyclictest181rcu_preempt07:38:161
18534997652,8cyclictest181rcu_preempt10:25:402
18534997652,15cyclictest352-21runrttasks11:24:462
18534997646,8cyclictest181rcu_preempt08:28:252
18534997643,9cyclictest181rcu_preempt11:06:162
18534997643,9cyclictest181rcu_preempt11:06:162
18534997630,18cyclictest28134-21unixbench_singl07:23:502
18524997640,10cyclictest181rcu_preempt10:36:321
18524997640,10cyclictest181rcu_preempt09:07:341
18524997634,10cyclictest181rcu_preempt09:37:041
18524997633,10cyclictest181rcu_preempt11:24:341
18524997630,7cyclictest181rcu_preempt11:18:311
18524997630,7cyclictest181rcu_preempt11:18:311
1851399766,42cyclictest0-21swapper/009:12:270
18513997647,10cyclictest18504-21cyclictest09:48:140
18513997647,10cyclictest18504-21cyclictest09:48:140
1851399763,43cyclictest4853-21tune2fs07:53:340
18534997556,13cyclictest4441-21sh09:15:292
18534997556,13cyclictest4441-21sh09:15:292
18534997549,8cyclictest181rcu_preempt08:21:102
18534997549,8cyclictest181rcu_preempt08:21:102
18534997544,9cyclictest181rcu_preempt08:58:322
18524997558,9cyclictest301ktimers/109:53:251
18524997558,9cyclictest301ktimers/109:53:251
18524997554,15cyclictest20641-21latency_hist09:43:141
18524997542,9cyclictest181rcu_preempt12:28:151
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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