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2026-04-14 - 06:03
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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 Apr 14, 2026 00:44:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2130721046,16sleep10-21swapper/118:59:591
217079910244,14cyclictest181rcu_preempt23:53:140
2024629714,52sleep019676-21snmpd18:58:310
2170799943,68cyclictest11649-21apt-get00:13:320
2170799943,68cyclictest11649-21apt-get00:13:320
21707999057,8cyclictest181rcu_preempt22:58:250
2029728915,42sleep20-21swapper/218:58:332
21707998854,14cyclictest181rcu_preempt23:28:370
21713998772,10cyclictest18399-21switchtime22:33:481
21713998772,10cyclictest18399-21switchtime22:33:481
21707998664,8cyclictest181rcu_preempt22:27:150
21707998664,8cyclictest181rcu_preempt22:27:150
21707998654,8cyclictest181rcu_preempt23:48:160
21707998551,13cyclictest181rcu_preempt20:43:150
21717998421,26cyclictest39-21ksoftirqd/222:33:512
21717998421,26cyclictest39-21ksoftirqd/222:33:512
21707998411,44cyclictest15-21ksoftirqd/021:33:370
21707998355,21cyclictest27450-21latency_hist20:58:170
21707998350,12cyclictest181rcu_preempt22:06:180
21707998350,12cyclictest181rcu_preempt22:06:180
21707998338,18cyclictest181rcu_preempt00:27:520
21707998314,30cyclictest15-21ksoftirqd/023:58:350
21717998253,20cyclictest22935-21sh00:33:142
21713998260,14cyclictest300-21rs:main1
21707998233,17cyclictest0-21swapper/023:10:550
21707998233,17cyclictest0-21swapper/023:10:550
21707998232,11cyclictest181rcu_preempt21:18:160
21707998232,11cyclictest181rcu_preempt21:18:160
21707998147,8cyclictest181rcu_preempt20:48:310
21707998146,20cyclictest181rcu_preempt22:08:450
21707998146,20cyclictest181rcu_preempt22:08:450
21707998141,15cyclictest181rcu_preempt19:48:360
21713998062,12cyclictest297-21systemd-logind22:53:141
21707998049,10cyclictest181rcu_preempt22:53:400
21707998036,17cyclictest181rcu_preempt22:19:460
21707998020,21cyclictest0-21swapper/020:22:000
21707998019,22cyclictest0-21swapper/022:02:020
21713997962,11cyclictest297-21systemd-logind00:08:151
21713997961,14cyclictest28969-21kworker/u19:3+events_unbound23:03:131
21713997960,13cyclictest2967-21if_eth023:58:381
21713997958,15cyclictest4957-21sh22:12:051
21713997958,15cyclictest4957-21sh22:12:051
2170799797,32cyclictest15-21ksoftirqd/000:08:240
2170799797,32cyclictest15-21ksoftirqd/000:08:240
21707997937,16cyclictest181rcu_preempt21:46:030
21707997937,16cyclictest181rcu_preempt21:46:030
21707997935,17cyclictest21693-21cyclictest23:41:350
21707997935,13cyclictest181rcu_preempt00:08:160
21707997928,11cyclictest181rcu_preempt22:41:280
21717997846,21cyclictest2544-21latency_hist21:13:172
21717997844,23cyclictest23995-21modprobe20:48:132
21717997838,11cyclictest3845-21ssh22:08:542
21717997838,11cyclictest3845-21ssh22:08:542
21713997858,14cyclictest24510-21processes19:08:481
21713997856,15cyclictest11715-21proc_pri20:09:441
21707997860,11cyclictest297-21systemd-logind19:13:140
21707997846,7cyclictest181rcu_preempt19:33:510
21707997846,7cyclictest181rcu_preempt19:33:510
21707997843,12cyclictest181rcu_preempt21:54:060
21707997840,9cyclictest181rcu_preempt21:28:510
21707997832,25cyclictest11364-21date23:18:160
21707997832,25cyclictest11364-21date23:18:160
21717997757,14cyclictest31891-21sh22:03:132
21717997737,12cyclictest15296-21ssh22:28:492
21713997762,10cyclictest21693-21cyclictest00:18:511
21713997759,12cyclictest2952-21systemd-journal20:23:151
21713997758,13cyclictest352-21runrttasks21:08:041
21707997746,16cyclictest181rcu_preempt20:13:360
21707997738,10cyclictest181rcu_preempt23:03:400
21717997638,9cyclictest181rcu_preempt22:44:312
21717997635,10cyclictest9583-21ssh00:08:562
21717997635,10cyclictest9583-21ssh00:08:562
2171799763,49cyclictest5992-21ssh22:13:372
2171799763,49cyclictest5992-21ssh22:13:372
2171799762,52cyclictest11078-21apt-get20:08:342
21713997656,14cyclictest17968-21ntp_offset23:28:441
21707997642,26cyclictest0-21swapper/021:48:420
21707997637,12cyclictest181rcu_preempt23:22:140
21717997555,14cyclictest5953-21fschecks_time21:18:372
21717997550,7cyclictest181rcu_preempt21:23:442
21717997550,7cyclictest181rcu_preempt21:23:442
21713997556,13cyclictest22647-21/usr/sbin/munin20:43:251
21713997555,14cyclictest1395-21sh23:55:481
21707997544,12cyclictest181rcu_preempt20:46:020
21707997543,11cyclictest181rcu_preempt23:27:520
21707997543,11cyclictest181rcu_preempt23:27:520
21707997533,8cyclictest181rcu_preempt21:18:210
21707997533,8cyclictest181rcu_preempt00:21:270
21707997530,22cyclictest0-21swapper/019:53:490
21717997457,11cyclictest26532-21idleruntime23:43:382
21717997457,10cyclictest5324-21munin-plugin-st23:08:162
21717997452,12cyclictest0-21swapper/220:13:312
21717997447,8cyclictest181rcu_preempt22:55:262
21717997446,7cyclictest181rcu_preempt23:26:352
21717997446,7cyclictest181rcu_preempt23:26:352
21717997421,25cyclictest39-21ksoftirqd/219:08:062
21713997459,9cyclictest1-21systemd20:38:161
21707997440,12cyclictest181rcu_preempt21:03:550
21707997438,16cyclictest181rcu_preempt00:28:400
21707997437,8cyclictest181rcu_preempt20:26:570
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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