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2026-05-04 - 21:27
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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 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
26775998330,47cyclictest352-21runrttasks09:34:281
26775998330,47cyclictest352-21runrttasks09:34:281
26768998361,15cyclictest16893-21switchtime08:07:260
26768998340,29cyclictest9933-21ssh11:02:210
2677599824,31cyclictest6007-21awk10:02:191
2677599824,31cyclictest6007-21awk10:02:191
2677599824,31cyclictest29130-21cut09:47:131
2677599824,31cyclictest29130-21cut09:47:131
2677599823,33cyclictest352-21runrttasks10:30:011
2677599823,31cyclictest11706-21cat09:17:261
2677599823,31cyclictest11706-21cat09:17:261
2677599823,30cyclictest2274-21latency_hist09:56:541
26775998232,42cyclictest0-21swapper/109:02:181
26775998232,41cyclictest0-21swapper/107:02:131
2677599822,33cyclictest2167-21ssh11:42:291
2677599822,30cyclictest10976-21switchtime11:57:251
2677599822,29cyclictest22955-21switchtime12:17:261
2677599822,28cyclictest352-21runrttasks07:53:571
26768998243,24cyclictest8472-21rm09:12:220
26768998241,26cyclictest22727-21rm11:23:180
26768998241,26cyclictest14314-21ssh12:02:400
26785998167,10cyclictest26759-21cyclictest10:42:522
26785998155,17cyclictest1478-21diskmemload09:17:262
26785998155,17cyclictest1478-21diskmemload09:17:262
2677599814,28cyclictest1900-21ntp_kernel_pll_07:22:201
2677599814,28cyclictest1900-21ntp_kernel_pll_07:22:201
2677599813,33cyclictest5381-21ssh10:01:551
2677599813,31cyclictest31918-21grep08:52:271
2677599813,29cyclictest9794-21ls11:02:171
2677599813,29cyclictest4621-21/usr/sbin/munin07:32:261
2677599813,28cyclictest20048-21taskset08:17:241
2677599813,28cyclictest14729-21tune2fs10:17:131
26775998131,41cyclictest0-21swapper/109:42:031
26775998130,43cyclictest0-21swapper/112:02:271
2677599812,39cyclictest25174-21ssh12:22:061
2677599812,32cyclictest30750-21latency_hist08:51:531
2677599812,28cyclictest969-21latency_hist11:41:541
2677599812,28cyclictest7110-21/usr/sbin/munin11:52:171
2676899813,56cyclictest27565-21apt-get11:32:080
26785998040,12cyclictest181rcu_preempt07:37:062
26785998039,12cyclictest181rcu_preempt12:13:362
2677599804,29cyclictest17064-21unixbench_multi08:07:281
2677599803,35cyclictest21544-21ssh12:16:041
2677599803,31cyclictest23971-21latency_hist08:31:551
2677599803,30cyclictest352-21runrttasks07:21:531
2677599803,28cyclictest6173-21sshd09:08:131
26768998064,11cyclictest28677-21latency_hist09:46:540
26768998060,14cyclictest352-21runrttasks11:07:250
26768998053,8cyclictest181rcu_preempt12:20:320
26768998053,19cyclictest3886-21latency_hist11:46:530
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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