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2026-08-07 - 00:03
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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 Thu Aug 06, 2026 00:44:27)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
67999913745,83cyclictest0-21swapper/021:16:060
6799991326,54cyclictest32631-21kworker/u19:2+ext4-rsv-conversion23:45:570
656321197,16sleep00-21swapper/018:54:280
67999911199,7cyclictest0-21swapper/021:56:440
68179910912,81cyclictest30066-21chrt22:15:483
68179910912,81cyclictest30066-21chrt22:15:483
6799991099,67cyclictest3981-21apt-get23:20:500
68129910276,18cyclictest21087-21latency_hist22:55:322
68129910173,19cyclictest31536-21apt-key20:10:332
68129910173,19cyclictest31536-21apt-key20:10:332
68129910081,12cyclictest18527-40ogrotate23:45:322
6799999882,9cyclictest0-21swapper/000:11:010
6799999882,9cyclictest0-21swapper/000:11:010
681799962,83cyclictest3992-21chrt23:20:443
6799999668,12cyclictest181rcu_preempt21:15:340
6799999359,13cyclictest181rcu_preempt19:55:460
6799999256,11cyclictest181rcu_preempt19:25:470
6799999256,11cyclictest181rcu_preempt19:25:470
679999914,66cyclictest30040-21kworker/u17:1+ext4-rsv-conversion22:15:510
679999914,66cyclictest30040-21kworker/u17:1+ext4-rsv-conversion22:15:510
6799999055,14cyclictest181rcu_preempt20:50:450
6799998952,27cyclictest11138-21ssh22:37:480
6805998850,25cyclictest8255-21kworker/u19:1-ext4-rsv-conversion23:20:441
6812998713,41cyclictest39-21ksoftirqd/219:43:002
6805998766,14cyclictest1-21systemd00:25:311
54182877,50sleep15469-21df18:50:501
6812998649,12cyclictest181rcu_preempt22:10:342
6812998613,33cyclictest39-21ksoftirqd/220:11:462
6812998613,33cyclictest39-21ksoftirqd/220:11:462
6805998662,18cyclictest21226-21sh22:00:551
6799998668,11cyclictest15-21ksoftirqd/023:00:340
6799998668,11cyclictest15-21ksoftirqd/023:00:340
681799855,53cyclictest0-21swapper/321:56:013
681299854,38cyclictest39-21ksoftirqd/222:58:442
681299854,38cyclictest39-21ksoftirqd/222:58:442
6812998516,29cyclictest39-21ksoftirqd/221:02:052
6812998512,41cyclictest39-21ksoftirqd/219:24:462
6812998512,41cyclictest39-21ksoftirqd/219:24:462
6805998567,11cyclictest6786-21cyclictest20:46:051
6805998467,11cyclictest3451-21gpgv23:20:321
6799998446,26cyclictest15368-21latency_hist19:20:340
6812998360,8cyclictest181rcu_preempt22:20:552
6799998364,13cyclictest2258-21systemd-run21:30:310
6812998241,28cyclictest6808-21cat23:25:372
6812998210,44cyclictest39-21ksoftirqd/223:37:442
6812998210,43cyclictest39-21ksoftirqd/220:21:582
6799998251,19cyclictest16999-21latency_hist19:25:340
6799998251,19cyclictest16999-21latency_hist19:25:340
6799998246,13cyclictest181rcu_preempt23:14:430
6812998113,39cyclictest39-21ksoftirqd/219:00:032
6805998163,12cyclictest1-21systemd22:51:551
6805998157,18cyclictest7206-21fschecks_time18:55:531
6799998155,18cyclictest17580-21apt-key21:55:340
6799998154,18cyclictest19802-21latency_hist21:05:330
6799998138,13cyclictest15-21ksoftirqd/000:22:310
681299802,45cyclictest39-21ksoftirqd/222:04:162
6812998012,27cyclictest39-21ksoftirqd/220:40:592
681299793,36cyclictest39-21ksoftirqd/221:19:432
6812997852,20cyclictest4239-21latency_hist00:15:332
6812997852,20cyclictest4239-21latency_hist00:15:332
6812997817,23cyclictest39-21ksoftirqd/222:17:082
6812997817,23cyclictest39-21ksoftirqd/222:17:082
6799997837,32cyclictest15529-21modprobe23:40:290
6799997813,10cyclictest181rcu_preempt21:43:530
681799773,58cyclictest0-21swapper/323:45:553
6812997739,23cyclictest352-21runrttasks23:50:262
681299772,35cyclictest39-21ksoftirqd/221:37:172
681299772,32cyclictest39-21ksoftirqd/200:22:512
6805997756,15cyclictest6786-21cyclictest20:10:341
6805997756,15cyclictest6786-21cyclictest20:10:341
6799997761,10cyclictest15-21ksoftirqd/021:39:080
6799997756,15cyclictest300-21rs:main0
6799997754,8cyclictest181rcu_preempt22:51:550
6799997742,28cyclictest0-21swapper/023:16:000
6799997731,12cyclictest181rcu_preempt21:46:040
6812997658,12cyclictest9649-21sh23:30:312
6812997656,7cyclictest181rcu_preempt21:48:372
6812997638,22cyclictest27183-21if_err_eth022:10:522
6812997638,22cyclictest27183-21if_err_eth022:10:522
681299762,35cyclictest21785-21latency_hist19:40:332
6805997660,10cyclictest9938-21rm22:35:561
6805997660,10cyclictest6786-21cyclictest21:35:331
6805997660,10cyclictest6786-21cyclictest21:35:331
6805997658,13cyclictest6786-21cyclictest23:01:541
6799997637,13cyclictest12321-21kworker/u17:2+xprtiod20:56:060
615727610,40sleep26248-21grep18:51:162
681799753,32cyclictest15422-21chrt22:45:433
6812997556,13cyclictest1236-21latency_hist00:10:322
6812997554,8cyclictest181rcu_preempt22:32:152
6812997547,12cyclictest181rcu_preempt00:18:032
6812997536,13cyclictest181rcu_preempt19:51:382
6812997520,45cyclictest381ktimers/221:50:582
6812997510,25cyclictest39-21ksoftirqd/221:40:412
6799997559,11cyclictest15-21ksoftirqd/023:50:510
6799997545,22cyclictest964-21kernelversion22:20:560
6799997545,20cyclictest18823-21apt-key23:45:350
6799997538,16cyclictest181rcu_preempt19:34:230
679999753,35cyclictest15851-21latency22:45:560
679999752,20cyclictest1-21systemd22:10:310
681799744,30cyclictest30468-21chrt20:05:563
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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