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2026-05-04 - 18:23
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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 50 highest latencies:
System rackbslot7.osadl.org (updated Mon May 04, 2026 12:44:26)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2629521610,19sleep30-21swapper/306:57:403
26137212013,76sleep126224-21grep06:57:391
26228211611,72sleep226294-21/usr/sbin/munin06:57:402
26775991153,31cyclictest27565-21apt-get11:32:101
267689910880,19cyclictest2374-21systemd-journal07:01:550
267759910255,40cyclictest544-21cron07:08:511
26775999432,49cyclictest0-21swapper/108:01:541
26775999257,25cyclictest8659-21sh10:07:131
2677599904,39cyclictest22486-21grep08:26:541
26768999061,21cyclictest24157-21latency_hist08:31:550
2677599894,40cyclictest4836-21grep11:47:241
26775998943,36cyclictest0-21swapper/111:13:381
26775998839,42cyclictest8637-21timerandwakeup07:42:271
26775998839,42cyclictest8637-21timerandwakeup07:42:271
26775998836,42cyclictest20994-21cron11:21:511
26775998836,42cyclictest20994-21cron11:21:511
2677599883,32cyclictest352-21runrttasks07:39:101
2677599882,30cyclictest28179-21seq12:27:061
2677599882,28cyclictest6173-21latency_hist10:56:541
2677599874,25cyclictest12613-21/usr/sbin/munin10:12:321
2677599874,25cyclictest12613-21/usr/sbin/munin10:12:321
26775998735,40cyclictest0-21swapper/111:22:261
2677599873,28cyclictest17463-21/usr/sbin/munin10:22:191
26768998758,12cyclictest181rcu_preempt08:42:030
2677599863,31cyclictest32720-21/usr/sbin/munin10:47:281
2677599863,29cyclictest7155-21taskset10:57:281
2677599863,25cyclictest24545-21cut11:27:131
2677599862,28cyclictest23757-21fschecks_count10:32:131
26785998549,10cyclictest181rcu_preempt07:17:062
2677599854,27cyclictest16107-21/usr/sbin/munin12:07:081
2677599853,30cyclictest29187-21cron10:41:511
2677599852,31cyclictest16522-21cron09:26:501
26775998511,12cyclictest0-21swapper/108:02:181
26768998557,15cyclictest15-21ksoftirqd/009:17:060
26768998557,15cyclictest15-21ksoftirqd/009:17:060
26785998452,11cyclictest181rcu_preempt10:37:062
26785998416,33cyclictest6881-21cat11:51:532
2677599847,60cyclictest29201-21apt-get10:42:071
2677599844,38cyclictest624-21ntpq08:57:201
2677599844,38cyclictest624-21ntpq08:57:201
26775998439,37cyclictest0-21swapper/108:12:271
2677599843,32cyclictest17687-21switchtime09:27:271
2677599843,31cyclictest22860-21/usr/sbin/munin09:37:261
2677599843,22cyclictest12307-21apt-get11:07:081
2677599842,31cyclictest26483-21fschecks_time08:38:231
26768998454,21cyclictest3268-21grep07:27:130
26768998443,26cyclictest13021-21ssh10:13:400
26768998443,26cyclictest13021-21ssh10:13:400
2677599834,25cyclictest24245-21/usr/sbin/munin08:32:151
2677599833,28cyclictest9807-21cpuspeed07:47:261
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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