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2025-11-24 - 00:00
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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 50 highest latencies:
System rackbslot7.osadl.org (updated Sun Nov 23, 2025 12:44:28)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1276721180,5sleep012766-21ssh10:30:020
24475991144,91cyclictest32144-21apt-get09:09:371
244759911063,39cyclictest0-21swapper/110:09:541
244659910689,13cyclictest22466-21kworker/u18:2+flush-179:011:24:360
244759910445,11cyclictest0-21swapper/109:54:511
244759910338,11cyclictest0-21swapper/111:59:501
24475991033,73cyclictest3751-21apt-get12:09:331
244759910240,13cyclictest0-21swapper/107:24:531
244759910240,13cyclictest0-21swapper/107:24:531
244759910140,12cyclictest0-21swapper/107:54:171
1523721010,6sleep30-21swapper/310:35:283
24494991003,58cyclictest12694-21chrt12:24:363
244759910044,9cyclictest0-21swapper/108:14:551
244759910044,9cyclictest0-21swapper/108:14:551
244759910038,12cyclictest0-21swapper/108:54:551
244759910031,13cyclictest0-21swapper/109:04:391
24475999936,11cyclictest0-21swapper/110:54:171
24475999836,13cyclictest0-21swapper/107:59:201
24475999834,16cyclictest0-21swapper/110:44:191
24475999834,16cyclictest0-21swapper/110:44:191
2447599982,39cyclictest11235-21ntp_kernel_err09:29:451
24475999749,11cyclictest207-21systemd-journal08:48:541
2447599973,41cyclictest10084-21apt-get11:24:321
24475999734,12cyclictest0-21swapper/110:44:381
2447599973,30cyclictest21302-21/usr/sbin/munin09:49:391
2447599972,37cyclictest24859-21sort11:49:341
24465999771,17cyclictest1-21systemd12:09:180
24475999650,39cyclictest3099-21diskmemload10:14:221
24475999636,9cyclictest0-21swapper/108:24:431
2447599953,37cyclictest30079-21latency_hist09:04:201
24475999439,12cyclictest0-21swapper/109:14:351
24465999449,10cyclictest181rcu_preempt08:49:290
24465999369,16cyclictest21153-21latency_hist09:49:190
24465999369,16cyclictest21153-21latency_hist09:49:190
24475999263,21cyclictest10711-21kworker/u17:4+events_unbound11:49:161
2447599923,42cyclictest25593-21fschecks_count08:49:381
2447599923,40cyclictest19211-21fschecks_time08:29:401
24475999221,29cyclictest7307-21grep12:14:511
2446599913,76cyclictest29539-21kworker/u19:1+ext4-rsv-conversion10:35:110
24488999059,23cyclictest20542-21kworker/u19:1+nfsiod12:04:552
24488998862,18cyclictest28058-21sendmail07:19:182
24465998833,17cyclictest181rcu_preempt11:54:340
24475998741,12cyclictest9485-21sh09:26:291
24475998741,12cyclictest9485-21sh09:26:291
2446599877,64cyclictest15735-21apt-get08:19:400
2446599874,45cyclictest24410-21kworker/0:2+events_power_efficient07:39:200
2446599874,45cyclictest24410-21kworker/0:2+events_power_efficient07:39:200
24465998665,15cyclictest24456-21cyclictest10:22:160
24488998559,17cyclictest11613-21/usr/sbin/munin10:29:352
24475998561,15cyclictest11411-21ssh10:29:191
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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