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2026-07-21 - 07:39
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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 Jul 21, 2026 00:44:34)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
8628212610,71sleep08147-21/usr/sbin/munin18:52:120
1378721160,3sleep20-21swapper/220:46:352
1843321080,9sleep30-21swapper/323:42:003
898821039,22sleep30-21swapper/318:52:233
965599987,61cyclictest32542-21apt-get21:22:431
965599987,61cyclictest32542-21apt-get21:22:431
93342987,17sleep20-21swapper/218:54:382
9660999660,8cyclictest181rcu_preempt00:24:522
9655999455,13cyclictest181rcu_preempt21:36:481
9660999218,41cyclictest39-21ksoftirqd/220:16:392
9655999176,8cyclictest0-21swapper/120:27:001
9655999176,8cyclictest0-21swapper/120:27:001
9660999060,18cyclictest11812-21sh23:31:352
9660999060,18cyclictest11812-21sh23:31:352
9660999057,9cyclictest181rcu_preempt19:32:112
9660999020,41cyclictest39-21ksoftirqd/219:37:142
9660999013,46cyclictest39-21ksoftirqd/218:56:532
9655999053,29cyclictest6097-21kworker/u17:3-rpciod23:42:001
9660998970,13cyclictest17054-21diskmemload22:41:552
9660998927,34cyclictest39-21ksoftirqd/219:01:442
966099862,71cyclictest32542-21apt-get21:22:412
966099862,71cyclictest32542-21apt-get21:22:412
9651998666,14cyclictest15413-21fschecks_time23:36:590
9651998666,14cyclictest15413-21fschecks_time23:36:590
9651998516,13cyclictest17899-21/usr/sbin/munin22:47:190
9651998516,13cyclictest17899-21/usr/sbin/munin22:47:190
9660998430,32cyclictest39-21ksoftirqd/221:51:532
9655998452,10cyclictest181rcu_preempt20:02:081
9655998441,11cyclictest181rcu_preempt19:51:491
9655998441,11cyclictest181rcu_preempt19:51:491
9651998464,15cyclictest12169-21latency_hist00:26:380
9660998368,10cyclictest9009-21latency_hist23:26:392
9660998358,16cyclictest5640-21cron21:31:352
9655998362,14cyclictest58-21kcompactd023:48:081
9651998363,14cyclictest300-21rs:main0
9651998363,14cyclictest300-21rs:main0
9660998264,13cyclictest29547-21latency_hist19:56:392
9660998264,13cyclictest29547-21latency_hist19:56:392
9660998217,36cyclictest39-21ksoftirqd/220:22:022
9655998257,16cyclictest9964-21ntp_offset00:22:051
9660998125,33cyclictest39-21ksoftirqd/221:16:562
9655998147,14cyclictest8720-21apt-get20:31:591
9651998163,11cyclictest1-21systemd20:46:350
9660998039,11cyclictest14177-21sensors_temp19:07:092
9660998039,11cyclictest14177-21sensors_temp19:07:092
9655998051,11cyclictest181rcu_preempt22:06:491
9651998056,16cyclictest9052-21latency_hist23:26:390
9651998055,19cyclictest9506-21interrupts22:32:010
9660997953,20cyclictest8473-21apt-key20:31:392
9660997953,20cyclictest8473-21apt-key20:31:392
9655997948,8cyclictest181rcu_preempt19:11:511
9655997948,8cyclictest181rcu_preempt19:11:511
9655997943,11cyclictest181rcu_preempt22:41:501
9655997941,8cyclictest181rcu_preempt21:30:411
9655997932,25cyclictest15370-21fschecks_time23:36:591
9655997932,25cyclictest15370-21fschecks_time23:36:591
9651997917,37cyclictest0-21swapper/023:42:020
9651997913,27cyclictest24243-21/usr/sbin/munin22:02:030
9651997913,27cyclictest24243-21/usr/sbin/munin22:02:030
9660997858,14cyclictest17703-21sh23:41:352
9660997858,14cyclictest17703-21sh23:41:352
9660997856,9cyclictest181rcu_preempt19:27:062
9660997856,7cyclictest181rcu_preempt23:34:482
9660997836,7cyclictest181rcu_preempt21:04:182
9660997834,11cyclictest12266-21fschecks_count22:36:582
9660997824,35cyclictest39-21ksoftirqd/223:47:052
9660997814,27cyclictest39-21ksoftirqd/223:52:022
9655997856,15cyclictest9642-21cyclictest21:59:461
9655997847,9cyclictest181rcu_preempt20:12:031
965599783,40cyclictest5645-21wc20:22:031
9655997828,9cyclictest0-21swapper/123:11:511
9655997828,9cyclictest0-21swapper/123:11:511
9651997860,12cyclictest277-21dbus-daemon20:36:360
9660997758,14cyclictest17054-21diskmemload00:01:592
9660997756,15cyclictest21496-21sh21:57:112
9660997750,8cyclictest181rcu_preempt00:13:382
9660997738,10cyclictest20455-21rm23:45:592
9660997736,9cyclictest181rcu_preempt21:01:182
9655997740,13cyclictest11034-21ssh22:34:371
9655997739,19cyclictest31-21ksoftirqd/122:11:461
965599773,35cyclictest6079-21modprobe00:16:341
9655997730,12cyclictest8054-21ssh00:18:481
9655997730,12cyclictest8054-21ssh00:18:481
9651997762,9cyclictest27855-21kworker/u17:0+rpciod21:17:120
9660997656,15cyclictest27862-21latency_hist19:51:382
9660997645,10cyclictest181rcu_preempt21:41:562
9660997643,10cyclictest181rcu_preempt19:21:362
9660997638,8cyclictest181rcu_preempt23:07:042
9655997656,13cyclictest297-21systemd-logind20:41:361
9655997656,11cyclictest1513-21ssh00:07:141
9655997656,11cyclictest1513-21ssh00:07:141
9655997632,9cyclictest181rcu_preempt23:32:011
9655997630,16cyclictest181rcu_preempt22:37:131
952127612,31sleep10-21swapper/118:56:371
9660997557,12cyclictest27891-21sh23:57:362
9660997557,12cyclictest27891-21sh23:57:362
9660997555,14cyclictest300-21rs:main2
9660997555,14cyclictest300-21rs:main2
9660997553,12cyclictest0-21swapper/222:12:092
9660997552,8cyclictest181rcu_preempt23:12:322
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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