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2025-12-07 - 05:37
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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 Dec 07, 2025 00:44:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2851921289,90sleep128529-21munin-run19:08:261
28658991102,88cyclictest17592-21apt-get21:33:381
1494421090,7sleep00-21swapper/021:28:260
27736210711,67sleep227766-21uname19:04:072
286589910511,83cyclictest11803-21apt-get19:53:441
502821040,6sleep30-21swapper/322:08:273
28658991046,74cyclictest1749-21modprobe23:58:291
286549910327,45cyclictest15-21ksoftirqd/023:23:450
286589910241,9cyclictest0-21swapper/120:43:231
286589910241,9cyclictest0-21swapper/120:43:231
28658991023,83cyclictest24858-21ssh22:43:511
27347210112,56sleep027417-21fschecks_time19:03:520
28658991009,82cyclictest1900-21apt-get19:23:511
2865899993,42cyclictest31561-21switchtime19:14:011
2865899993,42cyclictest31561-21switchtime19:14:011
28671999613,38cyclictest0-21swapper/319:23:513
2865899962,40cyclictest5963-21timerwakeupswit19:34:001
2800629526,42sleep30-21swapper/319:04:123
28658999469,18cyclictest28089-21sh22:48:511
28658999469,18cyclictest28089-21sh22:48:511
28658999469,16cyclictest20847-21ssh21:38:341
2865899942,43cyclictest3390-21grep22:04:031
28658999377,10cyclictest26395-21apt-config21:48:281
2865899933,40cyclictest20208-21sshd20:18:561
2865899933,40cyclictest20208-21sshd20:18:561
2865899922,40cyclictest355-21runrttasks00:08:251
2865899913,33cyclictest12364-21/usr/sbin/munin21:23:501
28654999068,16cyclictest23183-21cpuspeed20:28:430
28654998764,16cyclictest314-21in:imuxsock00:38:230
28654998749,9cyclictest181rcu_preempt00:16:090
2865499872,45cyclictest15-21ksoftirqd/021:28:590
28654998666,14cyclictest18575-21fschecks_count21:34:420
28665998563,14cyclictest2272-21ssh22:03:282
2865899854,70cyclictest2225-21apt-get21:03:381
28654998549,8cyclictest181rcu_preempt23:51:020
28654998458,20cyclictest9381-21latency_hist21:18:260
28654998458,20cyclictest9381-21latency_hist21:18:260
28654998444,8cyclictest181rcu_preempt20:33:420
28654998444,11cyclictest181rcu_preempt22:18:570
28654998444,11cyclictest181rcu_preempt22:18:570
28665998344,29cyclictest31124-21cut19:13:492
28665998344,29cyclictest31124-21cut19:13:492
28658998359,15cyclictest316-21rs:main1
28658998357,19cyclictest18893-21sendmail_mailqu20:14:051
28658998346,8cyclictest181rcu_preempt23:58:231
28658998346,8cyclictest181rcu_preempt23:58:231
28658998257,17cyclictest28645-21cyclictest19:23:271
28654998261,15cyclictest2710-21timerandwakeup19:24:340
28654998254,8cyclictest181rcu_preempt20:28:280
28654998217,47cyclictest15-21ksoftirqd/023:53:420
28654998217,47cyclictest15-21ksoftirqd/023:53:420
281742820,7sleep23581-21diskmemload22:48:532
281742820,7sleep23581-21diskmemload22:48:532
126612820,7sleep00-21swapper/019:55:100
28658998160,15cyclictest17625-21apt-key21:33:251
2865499812,48cyclictest15-21ksoftirqd/022:15:130
2865499812,48cyclictest15-21ksoftirqd/022:15:130
28665998054,19cyclictest18950-21sh23:30:232
28665998054,19cyclictest18950-21sh23:30:232
2865499805,44cyclictest15-21ksoftirqd/020:45:360
28654998048,9cyclictest181rcu_preempt23:13:270
28654998041,10cyclictest181rcu_preempt21:53:460
28654998023,38cyclictest15-21ksoftirqd/022:48:410
28654998023,38cyclictest15-21ksoftirqd/022:48:410
28654998023,25cyclictest15-21ksoftirqd/021:04:420
28665997954,18cyclictest29309-21mailstats23:48:592
2866599794,36cyclictest39-21ksoftirqd/220:30:072
2866599792,46cyclictest39-21ksoftirqd/200:36:202
2865899797,52cyclictest292-21dbus-daemon00:33:241
2865899797,33cyclictest26578-21apt-get21:48:401
2865899797,33cyclictest26578-21apt-get21:48:401
28654997930,32cyclictest15-21ksoftirqd/021:39:000
28665997851,20cyclictest983-21sh22:58:462
2866599783,35cyclictest39-21ksoftirqd/219:10:472
2866599781,19cyclictest11301-21apt-get19:53:382
28654997863,9cyclictest3581-21diskmemload22:58:270
28654997863,9cyclictest161ktimers/023:38:520
28654997860,13cyclictest28645-21cyclictest19:33:240
28654997858,14cyclictest3213-21threads22:04:010
28654997856,16cyclictest314-21in:imuxsock23:30:580
28654997856,16cyclictest314-21in:imuxsock23:30:580
28654997846,24cyclictest0-21swapper/022:09:000
28654997846,24cyclictest0-21swapper/022:09:000
2867199773,36cyclictest0-21swapper/321:33:473
28665997755,15cyclictest309-21systemd-logind22:18:252
28665997755,15cyclictest309-21systemd-logind22:18:252
28658997748,22cyclictest22141-21if_err_eth022:38:491
28654997711,30cyclictest15-21ksoftirqd/020:22:210
28654997711,30cyclictest15-21ksoftirqd/020:22:210
2867199763,51cyclictest0-21swapper/323:58:263
2867199763,51cyclictest0-21swapper/323:58:263
28665997652,16cyclictest24914-21sh23:41:312
28665997642,28cyclictest20375-21needreboot20:19:002
28665997642,28cyclictest20375-21needreboot20:19:002
28658997653,17cyclictest952-21fschecks_count22:58:461
28658997652,13cyclictest0-21swapper/122:54:011
28654997636,30cyclictest0-21swapper/023:03:260
28654997616,16cyclictest15-21ksoftirqd/019:47:290
2866599756,35cyclictest39-21ksoftirqd/220:04:152
2866599755,45cyclictest18130-21apt-get21:33:392
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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