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2026-07-02 - 14:24
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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 Thu Jul 02, 2026 00:44:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
169149910648,28cyclictest16900-21cyclictest21:50:391
15605210513,57sleep015643-21fschecks_count18:53:190
15605210513,57sleep015643-21fschecks_count18:53:190
1291021020,6sleep10-21swapper/100:14:321
169099910122,48cyclictest0-21swapper/021:58:130
16909999663,26cyclictest297-21systemd-logind21:17:540
277862950,10sleep2371rcuc/221:57:562
16914999546,12cyclictest16900-21cyclictest21:35:181
16914999546,12cyclictest16900-21cyclictest21:35:181
1690999949,43cyclictest20956-21timerandwakeup23:33:290
16909999414,36cyclictest13543-21apt-get23:23:050
16926999260,7cyclictest181rcu_preempt19:53:092
16914999175,10cyclictest1914-21/usr/sbin/munin23:03:091
16914999175,10cyclictest1914-21/usr/sbin/munin23:03:091
16914999163,9cyclictest181rcu_preempt23:48:481
16914999157,13cyclictest181rcu_preempt20:18:271
16926999055,8cyclictest181rcu_preempt22:23:362
16926999055,8cyclictest181rcu_preempt22:23:362
16909999023,35cyclictest0-21swapper/000:02:550
16926998968,15cyclictest20228-21threads20:43:292
16926998967,12cyclictest12636-21kworker/u17:4-rpciod21:37:562
16926998967,12cyclictest12636-21kworker/u17:4-rpciod21:37:562
16926998952,8cyclictest181rcu_preempt22:28:142
16909998969,11cyclictest24071-21diskmemload21:53:290
16926998861,18cyclictest22526-21sh22:43:152
16914998817,40cyclictest31-21ksoftirqd/119:57:571
16909998810,24cyclictest13491-21sed20:24:230
16926998755,8cyclictest181rcu_preempt23:20:402
16926998740,11cyclictest4141-21fschecks_count21:18:162
16926998740,11cyclictest4141-21fschecks_count21:18:162
16926998737,28cyclictest16900-21cyclictest22:09:102
16926998726,24cyclictest0-21swapper/223:15:122
1692699872,58cyclictest352-21runrttasks19:18:142
1692699872,58cyclictest352-21runrttasks19:18:142
16914998710,59cyclictest23734-21apt-get19:18:161
16914998710,59cyclictest23734-21apt-get19:18:161
16909998717,20cyclictest13902-21ssh00:17:250
16926998651,12cyclictest181rcu_preempt00:09:132
16926998651,12cyclictest181rcu_preempt00:09:132
1691499869,44cyclictest31-21ksoftirqd/122:08:411
16909998622,34cyclictest0-21swapper/020:59:280
16926998555,10cyclictest181rcu_preempt22:42:252
16926998549,13cyclictest181rcu_preempt20:48:312
16926998549,13cyclictest181rcu_preempt20:48:312
16914998567,12cyclictest0-21swapper/122:58:151
1691499852,54cyclictest14201-21ssh23:23:221
16909998565,12cyclictest277-21dbus-daemon22:52:540
16909998528,26cyclictest277-21dbus-daemon21:52:540
16909998521,33cyclictest0-21swapper/022:38:130
16926998452,10cyclictest181rcu_preempt22:14:182
16926998445,8cyclictest181rcu_preempt21:45:162
16926998428,20cyclictest0-21swapper/221:24:542
16926998425,26cyclictest0-21swapper/221:48:472
16914998450,8cyclictest181rcu_preempt22:24:561
16914998450,8cyclictest181rcu_preempt22:24:561
16914998448,30cyclictest4050-21apt-get22:13:121
16914998421,39cyclictest31-21ksoftirqd/119:38:221
16909998427,28cyclictest28133-21kworker/u17:3+xprtiod22:09:550
16909998422,30cyclictest8735-21kworker/u17:0+rpciod00:26:400
16909998422,30cyclictest8735-21kworker/u17:0+rpciod00:26:400
16909998421,23cyclictest0-21swapper/019:33:090
16909998419,28cyclictest14465-21rm21:34:480
16909998419,28cyclictest14465-21rm21:34:480
16926998353,10cyclictest181rcu_preempt22:06:502
16926998260,8cyclictest181rcu_preempt22:33:262
16926998260,8cyclictest181rcu_preempt22:33:262
16926998255,9cyclictest181rcu_preempt21:11:082
16926998231,22cyclictest0-21swapper/223:54:402
16914998261,8cyclictest181rcu_preempt22:06:021
16914998253,7cyclictest181rcu_preempt21:40:541
16914998251,8cyclictest181rcu_preempt20:38:291
1690999828,25cyclictest22623-21if_eth022:43:160
1690999826,45cyclictest5817-21ssh22:13:530
16909998261,13cyclictest5242-21fschecks_time23:08:170
16909998215,31cyclictest11225-21grep22:23:270
16909998215,31cyclictest11225-21grep22:23:270
16909998215,26cyclictest10989-21unixbench_singl21:28:320
16926998160,7cyclictest181rcu_preempt20:53:142
16926998156,17cyclictest24399-21kworker/u17:3-xprtiod23:03:132
16926998156,17cyclictest24399-21kworker/u17:3-xprtiod23:03:132
16926998151,7cyclictest181rcu_preempt20:08:232
16926998147,11cyclictest181rcu_preempt23:38:252
16926998147,11cyclictest181rcu_preempt23:38:252
16926998146,8cyclictest181rcu_preempt19:43:292
1692699813,49cyclictest13007-21apt-get20:23:112
16926998123,24cyclictest0-21swapper/223:27:202
1691499816,43cyclictest31-21ksoftirqd/121:43:181
16914998149,8cyclictest181rcu_preempt20:48:271
16914998149,8cyclictest181rcu_preempt20:48:271
1691499813,56cyclictest32259-21sh23:53:121
16914998135,11cyclictest181rcu_preempt21:32:491
16914998119,32cyclictest31-21ksoftirqd/123:58:301
16909998127,43cyclictest0-21swapper/023:38:030
16909998127,43cyclictest0-21swapper/023:38:030
16909998121,27cyclictest16556-21/usr/sbin/munin21:38:270
16909998119,23cyclictest9421-21ssh22:20:430
16909998113,27cyclictest28490-21vmstat21:03:340
16909998110,40cyclictest27919-21rm23:45:500
16926998059,16cyclictest16900-21cyclictest20:38:152
16926998056,17cyclictest544-21cron23:32:532
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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