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2026-04-19 - 08:10
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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 Sun Apr 19, 2026 00:44:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
157721620,17sleep30-21swapper/318:58:403
22619912243,18cyclictest18971-21sendmail19:52:540
22619912048,11cyclictest0-21swapper/020:28:170
22619911652,13cyclictest12582-21latency_hist19:32:570
22619911651,59cyclictest14223-21timerwakeupswit22:03:290
2261991143,32cyclictest29091-21ssh23:23:270
22729911034,37cyclictest0-21swapper/100:08:081
22729911034,37cyclictest0-21swapper/100:08:081
2261991103,42cyclictest23727-21processes00:09:010
2261991103,42cyclictest23727-21processes00:09:010
22619910955,47cyclictest0-21swapper/023:53:220
950210412,59sleep01006-21fschecks_time18:58:220
227299982,62cyclictest13773-21cat23:52:591
227299982,62cyclictest13773-21cat23:52:591
13372979,53sleep21367-21ps18:58:362
227299959,51cyclictest12804-21apt-get19:33:161
227299954,47cyclictest0-21swapper/100:13:161
2272999510,65cyclictest16494-21apt-get22:08:081
2261999577,12cyclictest25244-21ssh22:23:090
2261999577,12cyclictest25244-21ssh22:23:090
2272999266,19cyclictest2117-21latency_hist19:02:571
2279999154,11cyclictest181rcu_preempt00:08:372
2279999154,11cyclictest181rcu_preempt00:08:372
2279999050,12cyclictest181rcu_preempt21:16:282
2261999073,10cyclictest2334-21ssh00:28:100
2272998869,14cyclictest31997-21switchtime22:33:271
2272998843,37cyclictest0-21swapper/100:03:261
2272998744,36cyclictest0-21swapper/122:18:321
2279998664,16cyclictest23063-21switchtime22:18:292
227999863,46cyclictest14830-21ssh23:54:202
227299869,28cyclictest4382-21apt-get21:48:111
227299869,28cyclictest4382-21apt-get21:48:111
2261998645,27cyclictest181rcu_preempt00:03:260
2279998546,9cyclictest181rcu_preempt20:13:072
2272998549,14cyclictest30084-21kworker/u19:1-writeback20:33:211
2261998562,15cyclictest0-21swapper/022:38:160
2261998546,17cyclictest181rcu_preempt19:08:240
2279998462,14cyclictest28601-21ssh22:28:202
2279998461,14cyclictest12210-21ssh22:54:392
2279998440,8cyclictest181rcu_preempt20:03:052
227999843,46cyclictest1153-21ssh22:37:162
2272998437,39cyclictest0-21swapper/121:13:271
227299843,67cyclictest4782-21apt-get23:38:041
2261998445,32cyclictest30714-21kworker/u17:3+nfsiod22:57:380
2272998364,12cyclictest2251-21cyclictest21:33:161
227299833,63cyclictest9329-21apt-get19:23:071
2272998334,42cyclictest7437-21latency_hist22:47:561
2272998334,42cyclictest7437-21latency_hist22:47:561
2272998324,53cyclictest0-21swapper/123:03:201
2279998231,13cyclictest181rcu_preempt21:28:202
2272998240,36cyclictest0-21swapper/121:08:161
2261998262,14cyclictest26485-21threads20:13:270
2261998260,15cyclictest2251-21cyclictest23:18:310
2261998260,15cyclictest2251-21cyclictest23:18:310
2272998160,14cyclictest29208-21unixbench_multi22:28:321
2272998157,16cyclictest0-21swapper/122:38:111
2261998164,10cyclictest23902-21ssh22:20:080
2279998043,8cyclictest181rcu_preempt19:33:332
2272998066,8cyclictest0-21swapper/122:07:531
2272998052,20cyclictest21894-21kernelversion21:23:201
2272998031,40cyclictest0-21swapper/123:17:561
2272998024,48cyclictest28697-21cut23:23:161
227299802,43cyclictest10562-21cat23:47:571
227299802,43cyclictest10562-21cat23:47:571
2261998062,12cyclictest5367-21ntp_offset21:49:300
2261998062,12cyclictest5367-21ntp_offset21:49:300
227299793,67cyclictest0-21swapper/119:03:061
227299793,67cyclictest0-21swapper/119:03:061
2261997961,12cyclictest2374-21systemd-journal21:07:550
2261997958,15cyclictest8505-21switchtime20:58:280
2261997956,16cyclictest1706-21apt-key22:37:570
227299783,66cyclictest0-21swapper/120:38:051
2272997834,36cyclictest0-21swapper/121:38:041
2272997834,33cyclictest0-21swapper/120:23:051
2272997834,33cyclictest0-21swapper/120:23:051
2272997831,40cyclictest2254-21grep21:43:311
2272997822,45cyclictest1-21systemd20:07:541
2261997859,11cyclictest19140-21sh22:12:570
2261997855,9cyclictest1631-21ssh23:32:560
2261997848,12cyclictest181rcu_preempt21:23:310
2261997842,29cyclictest8109-21cat19:18:200
240012770,7sleep30-21swapper/322:20:253
2279997762,10cyclictest2251-21cyclictest19:58:212
2279997757,12cyclictest19735-21ssh22:13:202
2279997757,12cyclictest19735-21ssh22:13:202
2272997757,14cyclictest300-21rs:main1
2272997757,14cyclictest300-21rs:main1
2272997749,22cyclictest11134-21fschecks_count19:28:161
227299774,64cyclictest0-21swapper/121:18:041
2261997749,20cyclictest2879-21unixbench_multi23:33:300
2285997611,37cyclictest0-21swapper/323:52:593
2285997611,37cyclictest0-21swapper/323:52:593
2279997647,20cyclictest1978-21latency_hist00:27:562
2279997646,21cyclictest7015-21tail19:13:312
2272997633,35cyclictest0-21swapper/119:43:211
2272997630,35cyclictest0-21swapper/120:13:101
2272997628,37cyclictest0-21swapper/100:29:151
2272997625,45cyclictest0-21swapper/100:22:211
2272997615,34cyclictest181rcu_preempt22:13:161
2272997615,34cyclictest181rcu_preempt22:13:161
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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