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2026-05-02 - 04:50
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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 Sat May 02, 2026 00:44:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
253922310,21sleep20-21swapper/218:57:462
1803213811,83sleep11820-21cstates18:57:211
3042211513,71sleep03045-21cron19:02:010
3202991133,79cyclictest11507-21apt-get21:57:190
3209991062,27cyclictest20158-21taskset22:11:562
32099910536,38cyclictest352-21runrttasks22:21:092
32099910536,38cyclictest352-21runrttasks22:21:092
3209991012,27cyclictest32540-21sh00:18:552
3209991012,27cyclictest24581-21sh21:24:522
32099910079,15cyclictest15708-21systemd-run23:52:022
3209991002,33cyclictest11642-21chrt19:24:372
106202990,6sleep10-21swapper/121:02:201
106202990,6sleep10-21swapper/121:02:201
320999973,30cyclictest22226-21taskset21:21:402
3209999531,37cyclictest0-21swapper/223:16:092
320999952,30cyclictest7102-21sh21:49:452
320999942,55cyclictest21969-21apt-get00:02:122
320999942,55cyclictest21969-21apt-get00:02:122
3202999367,18cyclictest565-21latency_hist20:32:040
3209999231,40cyclictest0-21swapper/219:51:362
3204999229,39cyclictest31-21ksoftirqd/122:35:051
3204999229,39cyclictest31-21ksoftirqd/122:35:051
3209999049,34cyclictest2990-21kworker/u17:1-xprtiod22:47:402
3204998963,19cyclictest7065-21latency_hist19:12:031
321699887,60cyclictest0-21swapper/322:27:243
320999882,31cyclictest352-21runrttasks19:02:292
3202998858,8cyclictest283742modprobe00:12:400
320999872,74cyclictest0-21swapper/220:22:122
320299872,70cyclictest6008-21cron22:42:000
320999863,6cyclictest0-21swapper/220:17:142
320999863,6cyclictest0-21swapper/220:17:142
320999862,36cyclictest5825-21if_eth020:47:252
320499863,59cyclictest30225-21diskstats22:28:061
320999852,35cyclictest12451-21/usr/sbin/munin21:58:462
320999852,26cyclictest31009-21runrttasks21:36:022
3204998567,12cyclictest8477-21ssh21:52:221
320299857,62cyclictest29733-21/usr/sbin/munin22:28:020
3202998549,15cyclictest181rcu_preempt19:02:250
3202998541,13cyclictest181rcu_preempt19:42:330
3202998541,13cyclictest181rcu_preempt19:42:330
321699842,34cyclictest8792-21chrt19:17:043
320999844,69cyclictest0-21swapper/220:57:162
320999843,70cyclictest0-21swapper/220:37:132
320999843,6cyclictest0-21swapper/200:27:122
320999843,69cyclictest0-21swapper/219:17:122
320999843,57cyclictest0-21swapper/219:32:172
320999842,38cyclictest15527-21rm22:57:182
320999842,26cyclictest352-21runrttasks20:56:152
3204998445,12cyclictest181rcu_preempt23:30:341
3204998442,8cyclictest181rcu_preempt21:09:301
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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