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2026-06-16 - 22:51
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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 Jun 16, 2026 12:44:28)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3101321336,90sleep231092-21timerwakeupswit06:54:432
3153121076,17sleep10-21swapper/106:58:291
2930121050,7sleep30-21swapper/308:29:233
31728991022,69cyclictest1794-21apt-get08:44:221
317309910135,39cyclictest0-21swapper/211:44:262
317309910135,39cyclictest0-21swapper/211:44:262
31728999446,27cyclictest4154-21ssh11:36:221
31730999130,25cyclictest23713-21sh09:27:102
31730999129,26cyclictest4536-21latency_hist10:43:592
31730999023,26cyclictest0-21swapper/211:03:012
31730998930,25cyclictest277-21dbus-daemon09:18:582
31730998926,28cyclictest15610-21taskset10:08:052
31730998926,28cyclictest15610-21taskset10:08:052
31728998914,41cyclictest8054-21apt-get10:49:131
31728998914,41cyclictest8054-21apt-get10:49:131
31723998969,14cyclictest32124-21sh11:29:180
31730998827,24cyclictest1145-21seq08:42:162
31730998826,28cyclictest0-21swapper/209:13:442
31730998823,28cyclictest0-21swapper/209:47:322
31728998846,19cyclictest181rcu_preempt12:09:151
3172399883,66cyclictest7489-21apt-get10:49:120
3172399883,66cyclictest7489-21apt-get10:49:120
31730998727,25cyclictest19231-21seq07:59:062
31730998630,20cyclictest6401-21diskmemload10:46:202
31730998627,26cyclictest31954-21seq08:36:412
31730998627,25cyclictest7470-21seq07:21:282
31730998626,32cyclictest2393-21ssh11:34:062
31730998625,24cyclictest15548-21seq07:46:432
31728998651,13cyclictest181rcu_preempt10:34:131
31728998651,13cyclictest181rcu_preempt10:34:131
31730998528,27cyclictest13845-21seq07:40:232
31730998527,22cyclictest25910-21ssh11:19:032
31730998527,20cyclictest7763-21seq11:43:142
31730998521,30cyclictest0-21swapper/209:02:092
31730998521,30cyclictest0-21swapper/209:02:092
31728998550,9cyclictest181rcu_preempt09:13:011
31730998428,22cyclictest277-21dbus-daemon11:28:582
31730998428,22cyclictest277-21dbus-daemon11:28:582
31730998427,31cyclictest15630-21seq11:55:142
31730998427,31cyclictest15630-21seq11:55:142
31728998461,15cyclictest2374-21systemd-journal10:57:161
31728998453,22cyclictest3701-21fschecks_time08:49:201
31730998328,24cyclictest26674-21seq10:25:292
31730998327,23cyclictest24638-21seq10:23:102
31730998327,23cyclictest24638-21seq10:23:102
31730998327,22cyclictest22260-21seq12:07:132
31730998326,25cyclictest18648-21taskset10:13:072
31730998326,24cyclictest8991-21seq07:25:212
31730998326,23cyclictest0-21swapper/210:49:322
31730998326,23cyclictest0-21swapper/210:49:322
31730998326,21cyclictest0-21swapper/212:24:192
31730998325,23cyclictest18190-21seq11:04:452
31730998324,24cyclictest0-21swapper/209:41:242
31730998323,23cyclictest0-21swapper/211:16:022
31730998319,26cyclictest0-21swapper/210:34:242
31730998319,26cyclictest0-21swapper/210:34:242
3172899834,34cyclictest25619-21latency_hist08:19:011
31723998365,13cyclictest14108-21sh10:59:130
31723998364,14cyclictest27169-21latency_hist08:24:000
31723998327,28cyclictest25772-21latency_hist11:19:000
31730998229,23cyclictest22343-21sh11:13:032
31730998228,22cyclictest4689-21seq08:52:572
31730998226,23cyclictest12468-21seq07:38:252
31730998225,22cyclictest1763-21ssh11:33:012
31730998223,20cyclictest25364-21seq08:18:102
3086028212,42sleep30-21swapper/306:54:403
3173799812,35cyclictest13365-21chrt10:04:133
3173799812,35cyclictest13365-21chrt10:04:133
31730998134,36cyclictest0-21swapper/209:59:132
31730998126,19cyclictest21119-21seq09:23:172
31730998125,22cyclictest6184-21seq09:51:502
31730998125,21cyclictest19749-21runrttasks12:03:312
31730998124,23cyclictest0-21swapper/208:30:282
31730998121,29cyclictest30836-21seq12:21:152
3172899816,29cyclictest352-21runrttasks08:34:121
31728998141,10cyclictest181rcu_preempt09:25:031
31728998138,12cyclictest181rcu_preempt12:04:251
31723998165,10cyclictest20900-21proc_pri12:04:300
44752800,5sleep3451rcuc/307:13:573
31730998028,21cyclictest21129-21seq10:16:422
31730998025,24cyclictest3111-21seq08:48:442
31730998021,23cyclictest29240-21grep10:29:352
31730998017,36cyclictest0-21swapper/207:09:002
31728998040,12cyclictest181rcu_preempt08:54:211
31723998053,15cyclictest19216-21sh11:07:350
3173799793,33cyclictest21631-21chrt10:18:073
31730997960,13cyclictest17460-21sshd09:54:162
31730997960,13cyclictest17460-21sshd09:54:162
31730997925,23cyclictest31878-21seq06:59:042
31730997924,18cyclictest6056-21seq07:18:572
31728997956,15cyclictest2374-21systemd-journal11:43:161
31728997955,10cyclictest181rcu_preempt11:26:281
31728997955,10cyclictest181rcu_preempt11:26:281
31723997963,10cyclictest10904-21kworker/u18:0+events_unbound08:58:570
31730997828,27cyclictest25576-21seq12:13:092
31730997825,20cyclictest27757-21taskset12:15:542
31730997821,24cyclictest0-21swapper/207:33:142
31730997820,24cyclictest25043-21fschecks_time09:29:212
31730997820,23cyclictest0-21swapper/207:57:162
31730997820,23cyclictest0-21swapper/207:57:162
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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