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2026-06-20 - 14:48
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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 Sat Jun 20, 2026 00:44:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
528421280,10sleep15285-21ssh22:43:451
31993991172,70cyclictest17275-21ssh22:09:040
31827211214,65sleep131860-21munin-plugin-st18:58:441
31827211214,65sleep131860-21munin-plugin-st18:58:441
319979910257,33cyclictest32642-21latency_hist20:38:431
31997991004,76cyclictest26703-21apt-get00:14:011
31997991004,76cyclictest26703-21apt-get00:14:011
3199799993,67cyclictest17265-21ssh22:09:031
31993999742,24cyclictest31981-21cyclictest21:39:480
31993999742,24cyclictest31981-21cyclictest21:39:480
3199399962,74cyclictest13711-21kworker/u19:1+ext4-rsv-conversion00:14:110
3199399962,74cyclictest13711-21kworker/u19:1+ext4-rsv-conversion00:14:110
31997999462,20cyclictest23446-21latency_hist00:08:471
32000999213,34cyclictest0-21swapper/200:00:282
31993999254,11cyclictest181rcu_preempt22:41:420
32000999171,12cyclictest11490-21apt-get22:53:532
32000999028,50cyclictest29292-21sshd23:23:582
32000999019,29cyclictest0-21swapper/223:33:492
32000999019,29cyclictest0-21swapper/223:33:492
31993999063,8cyclictest181rcu_preempt20:49:050
31993999063,19cyclictest7283-21sh20:59:060
32000998920,27cyclictest24086-21sed00:09:112
31997998967,11cyclictest0-21swapper/122:53:461
31997998966,14cyclictest9901-21cpuspeed19:29:001
31997998965,16cyclictest2374-21systemd-journal22:20:591
31993998953,30cyclictest17138-21latency_hist22:08:480
32000998824,27cyclictest14197-21tail21:09:192
32000998822,27cyclictest19676-21snmpd20:34:182
31997998864,15cyclictest10276-21kworker/u17:2-rpciod21:19:141
3199799882,63cyclictest8278-21ssh21:54:291
3199799882,63cyclictest8278-21ssh21:54:291
32000998766,15cyclictest9952-21apt-key21:03:472
31993998742,34cyclictest0-21swapper/020:03:430
32000998665,14cyclictest1916-21latency_hist20:43:462
32000998624,27cyclictest2768-21runrttasks22:39:002
31997998662,17cyclictest28841-21latency_hist22:28:451
31997998655,8cyclictest181rcu_preempt00:12:341
31997998649,12cyclictest181rcu_preempt22:04:001
31997998639,13cyclictest181rcu_preempt22:59:401
31997998639,13cyclictest181rcu_preempt22:59:401
31997998625,27cyclictest0-21swapper/122:54:121
31993998658,19cyclictest6657-21diskmemload23:36:390
31993998658,19cyclictest6657-21diskmemload23:36:390
32000998513,38cyclictest11376-40mandb23:48:472
31993998554,8cyclictest181rcu_preempt19:44:070
32000998423,26cyclictest352-21runrttasks22:09:022
32000998410,37cyclictest11161-21ssh22:53:422
31997998460,17cyclictest1-21systemd20:03:441
31993998444,9cyclictest181rcu_preempt23:30:250
32000998321,23cyclictest3538-21ssh21:45:562
32000998318,24cyclictest0-21swapper/221:33:152
32000998316,37cyclictest9209-21ssh21:55:312
32000998316,37cyclictest9209-21ssh21:55:312
31997998364,9cyclictest0-21swapper/120:19:181
31997998359,9cyclictest31959-21ssh21:39:141
31997998359,9cyclictest31959-21ssh21:39:141
31997998345,11cyclictest181rcu_preempt20:08:561
31997998345,11cyclictest181rcu_preempt20:08:561
31997998328,25cyclictest31981-21cyclictest00:23:431
31993998356,19cyclictest23843-21sh23:14:100
32000998259,16cyclictest31935-21latency_hist22:33:472
32000998223,27cyclictest22769-21runrttasks21:24:152
32000998222,34cyclictest30514-21ssh21:37:202
32000998221,26cyclictest352-21runrttasks23:31:012
32000998220,25cyclictest7212-21taskset19:19:182
32000998220,25cyclictest7212-21taskset19:19:182
32000998216,36cyclictest352-21runrttasks22:01:472
31997998260,12cyclictest0-21swapper/119:09:181
31997998237,15cyclictest181rcu_preempt22:16:161
31993998249,9cyclictest181rcu_preempt00:23:390
32000998163,11cyclictest17460-21sshd23:57:592
32000998163,11cyclictest17460-21sshd23:57:592
32000998122,23cyclictest18513-21seq21:17:502
32000998122,23cyclictest18513-21seq21:17:502
32000998119,30cyclictest20864-21basename20:03:432
32000998113,29cyclictest23729-21ntp_states22:19:112
32000998111,36cyclictest0-21swapper/220:54:352
31997998141,8cyclictest181rcu_preempt20:48:591
31997998136,11cyclictest181rcu_preempt20:58:461
31997998128,21cyclictest0-21swapper/122:02:351
3199399814,62cyclictest8290-21ssh21:54:310
3199399814,62cyclictest8290-21ssh21:54:310
31993998132,8cyclictest181rcu_preempt23:20:000
31993998126,25cyclictest0-21swapper/019:43:460
32000998041,28cyclictest22181-21timerandwakeup20:04:452
32000998041,28cyclictest22181-21timerandwakeup20:04:452
32000998031,15cyclictest0-21swapper/222:34:072
32000998031,15cyclictest0-21swapper/222:34:072
32000998020,26cyclictest6657-21diskmemload22:44:332
32000998020,26cyclictest6657-21diskmemload22:44:332
32000998020,24cyclictest6164-21seq19:16:442
32000998019,24cyclictest0-21swapper/200:14:002
32000998019,24cyclictest0-21swapper/200:14:002
31997998065,10cyclictest31981-21cyclictest21:44:011
31997998060,14cyclictest17706-21ssh23:59:011
31997998044,11cyclictest181rcu_preempt20:44:061
31997998041,7cyclictest181rcu_preempt23:14:231
3199399804,64cyclictest10188-21apt-get21:04:070
3199399804,64cyclictest10188-21apt-get21:04:070
31993998038,10cyclictest181rcu_preempt22:28:480
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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