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2026-05-20 - 21:13
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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 Wed May 20, 2026 12:44:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
14624220811,94sleep214702-21/usr/sbin/munin06:56:072
14786213511,96sleep114856-21tune2fs06:56:141
1489721049,22sleep30-21swapper/306:56:163
16062991023,72cyclictest30211-21apt-get10:06:150
16062991023,72cyclictest30211-21apt-get10:06:150
160679910057,38cyclictest16053-21cyclictest10:35:211
16067999933,37cyclictest0-21swapper/110:00:481
1606299998,78cyclictest10922-21apt-get11:21:030
1606299998,71cyclictest12419-21apt-get10:31:040
16062999942,13cyclictest16053-21cyclictest10:17:370
16067999882,11cyclictest16053-21cyclictest08:41:091
16071999647,41cyclictest0-21swapper/211:16:032
1606299964,71cyclictest2613-21apt-get12:01:010
21102950,8sleep10-21swapper/107:55:501
16067999551,36cyclictest15740-21kernelversion08:36:121
16062999341,11cyclictest181rcu_preempt09:51:080
16062999258,11cyclictest181rcu_preempt11:16:050
1606299923,47cyclictest21638-21apt-get10:46:020
1606299923,47cyclictest21638-21apt-get10:46:020
16071999143,40cyclictest0-21swapper/212:00:582
16062999164,18cyclictest17847-21latency_hist07:05:510
16062999058,24cyclictest21933-21apt-key10:45:510
16071998969,10cyclictest0-21swapper/210:45:492
16071998967,16cyclictest23960-21unixbench_singl11:41:232
16071998966,16cyclictest16053-21cyclictest09:46:122
16067998949,32cyclictest22568-21kworker/u17:2-rpciod11:51:201
16067998870,9cyclictest0-21swapper/112:26:221
16071998744,35cyclictest0-21swapper/209:11:102
16067998770,10cyclictest28421-21diskmemload11:50:301
16067998770,10cyclictest28421-21diskmemload11:50:301
16062998750,27cyclictest30155-21kworker/u17:1+nfsiod11:03:050
16062998749,13cyclictest181rcu_preempt10:05:490
16062998749,13cyclictest181rcu_preempt10:05:490
16067998643,36cyclictest277-21dbus-daemon09:30:481
16067998643,36cyclictest277-21dbus-daemon09:30:481
1606799862,44cyclictest26001-21chrt09:05:161
16062998614,16cyclictest15-21ksoftirqd/007:24:250
16071998570,10cyclictest19676-21snmpd11:21:572
16067998569,10cyclictest16053-21cyclictest07:01:251
16067998567,12cyclictest2374-21systemd-journal10:09:381
16067998567,12cyclictest2374-21systemd-journal10:09:381
16067998546,33cyclictest23213-21diskmemload12:17:451
16067998546,33cyclictest23213-21diskmemload12:17:451
16067998543,35cyclictest0-21swapper/109:11:201
16067998542,37cyclictest16053-21cyclictest10:51:121
16067998540,38cyclictest23213-21diskmemload10:27:511
16062998551,27cyclictest16053-21cyclictest12:06:090
151492857,54sleep015154-21ntpq06:56:250
16067998466,11cyclictest0-21swapper/109:23:391
16067998463,12cyclictest0-21swapper/107:05:591
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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