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2026-06-11 - 23:35
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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 Jun 11, 2026 12:44:35)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
76821257,19sleep00-21swapper/006:58:230
76821257,19sleep00-21swapper/006:58:230
9879912411,97cyclictest2767-21apt-get11:29:570
32526211811,75sleep132532-21/usr/sbin/munin06:54:571
32526211811,75sleep132532-21/usr/sbin/munin06:54:571
9879911732,12cyclictest0-21swapper/011:55:230
9879911732,12cyclictest0-21swapper/011:55:230
987991166,43cyclictest22720-21apt-get11:09:340
9879911513,26cyclictest24409-21sh10:19:170
987991128,86cyclictest28988-21apt-get11:19:420
987991128,86cyclictest28988-21apt-get11:19:420
9879910935,44cyclictest13511-21apt-get10:54:360
987991073,49cyclictest18772-21kworker/u18:4+ext4-rsv-conversion10:09:580
987991073,49cyclictest18772-21kworker/u18:4+ext4-rsv-conversion10:09:580
2913821050,7sleep20-21swapper/210:25:502
9879910071,20cyclictest6362-21latency_hist09:49:210
82321006,72sleep20-21swapper/206:59:062
82321006,72sleep20-21swapper/206:59:062
1005991009,57cyclictest0-21swapper/311:19:373
1005991009,57cyclictest0-21swapper/311:19:373
98799996,41cyclictest19589-21apt-get07:54:320
997999851,8cyclictest181rcu_preempt10:00:022
100599988,79cyclictest0-21swapper/311:54:513
100599988,79cyclictest0-21swapper/311:54:513
987999664,15cyclictest181rcu_preempt09:34:310
997999374,13cyclictest352-21runrttasks09:49:212
99799923,61cyclictest18722-21apt-get10:09:332
99799923,61cyclictest18722-21apt-get10:09:332
997998957,7cyclictest181rcu_preempt09:01:502
997998957,7cyclictest181rcu_preempt09:01:502
987998959,21cyclictest28260-21latency_hist08:19:210
997998853,7cyclictest181rcu_preempt08:04:482
98799885,44cyclictest3456-21apt-get07:04:330
992998749,12cyclictest181rcu_preempt10:10:281
992998749,12cyclictest181rcu_preempt10:10:281
987998746,31cyclictest0-21swapper/012:09:500
997998655,9cyclictest181rcu_preempt08:49:212
997998642,9cyclictest0-21swapper/207:34:212
992998664,15cyclictest13215-21latency_hist10:54:211
99299862,48cyclictest31-21ksoftirqd/108:46:581
987998669,9cyclictest15-21ksoftirqd/008:34:200
987998664,14cyclictest15-21ksoftirqd/010:04:210
997998544,12cyclictest181rcu_preempt08:19:542
99799853,57cyclictest13511-21apt-get10:54:342
992998512,38cyclictest31-21ksoftirqd/112:05:451
992998512,38cyclictest31-21ksoftirqd/112:05:451
987998558,17cyclictest3953-21latency_hist08:44:210
997998436,13cyclictest181rcu_preempt10:19:432
997998436,13cyclictest181rcu_preempt10:19:432
997998367,9cyclictest14613-21apt-key07:39:212
997998362,8cyclictest181rcu_preempt12:19:212
99299838,44cyclictest31-21ksoftirqd/112:01:191
992998363,14cyclictest14272-21processes10:55:041
992998348,8cyclictest181rcu_preempt08:22:161
99299834,40cyclictest31-21ksoftirqd/108:56:101
99299832,35cyclictest31-21ksoftirqd/109:40:421
99299832,35cyclictest31-21ksoftirqd/109:40:421
3211128317,38sleep30-21swapper/306:54:393
3211128317,38sleep30-21swapper/306:54:393
997998267,9cyclictest31091-21ssh11:22:432
997998267,9cyclictest31091-21ssh11:22:432
997998258,8cyclictest181rcu_preempt08:14:532
997998247,10cyclictest22877-21ssh10:15:042
997998240,12cyclictest32576-21sh10:32:012
99799823,50cyclictest20092-21apt-get07:54:322
992998248,10cyclictest7570-21users09:49:571
992998248,10cyclictest7570-21users09:49:571
99299822,38cyclictest31-21ksoftirqd/109:33:511
987998255,18cyclictest8613-21diskmemload11:44:320
992998138,16cyclictest181rcu_preempt09:06:541
992998138,16cyclictest181rcu_preempt09:06:541
992998136,12cyclictest181rcu_preempt09:26:041
992998136,12cyclictest181rcu_preempt09:26:041
987998155,16cyclictest6594-21latency_hist07:14:200
987998155,16cyclictest6594-21latency_hist07:14:200
98799813,32cyclictest8613-21diskmemload10:44:540
997998058,8cyclictest181rcu_preempt12:22:382
997998055,9cyclictest181rcu_preempt11:26:032
992998060,14cyclictest8613-21diskmemload10:19:201
992998035,12cyclictest181rcu_preempt08:54:211
987998060,14cyclictest7272-21cpu08:54:340
987998040,10cyclictest181rcu_preempt10:04:330
997997962,11cyclictest5507-21ssh11:34:202
997997960,13cyclictest6917-21cat09:49:442
997997960,13cyclictest6917-21cat09:49:442
997997948,7cyclictest181rcu_preempt12:01:102
997997936,12cyclictest30954-21sh09:34:542
997997924,27cyclictest39-21ksoftirqd/207:09:382
997997924,27cyclictest39-21ksoftirqd/207:09:382
992997945,10cyclictest17001-21ssh11:53:261
992997945,10cyclictest17001-21ssh11:53:261
99299792,32cyclictest31-21ksoftirqd/111:01:501
987997959,14cyclictest9943-21unixbench_multi08:59:540
987997959,14cyclictest9943-21unixbench_multi08:59:540
987997957,14cyclictest25364-21ssh10:19:490
987997957,14cyclictest25364-21ssh10:19:490
1005997947,21cyclictest0-21swapper/308:04:453
997997844,8cyclictest0-21swapper/211:14:492
997997844,8cyclictest0-21swapper/211:14:492
997997843,12cyclictest17343-21ssh11:54:182
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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