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2026-08-15 - 19:57
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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 Sat Aug 15, 2026 12:44:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
27356991182,76cyclictest4675-21ssh11:45:160
273569911584,25cyclictest27170-21sh12:20:170
273569911584,25cyclictest27170-21sh12:20:170
27364991044,72cyclictest20241-21apt-get08:25:182
27364991044,72cyclictest20241-21apt-get08:25:182
273649910058,13cyclictest181rcu_preempt12:30:162
273649910058,13cyclictest181rcu_preempt12:30:162
27356999869,20cyclictest6777-21latency_hist07:45:020
27356999863,25cyclictest10229-21latency_hist07:55:020
27364999777,15cyclictest27349-21cyclictest10:10:302
27356999767,8cyclictest181rcu_preempt09:50:430
27356999767,23cyclictest9856-21kworker/u19:2+events_unbound11:19:580
183272970,7sleep30-21swapper/312:05:343
27364999652,9cyclictest181rcu_preempt07:50:022
27364999560,13cyclictest181rcu_preempt10:35:152
27364999560,13cyclictest181rcu_preempt10:35:152
27356999571,15cyclictest4412-21rm11:45:010
27356999557,28cyclictest0-21swapper/012:30:340
27356999557,28cyclictest0-21swapper/012:30:340
27364999472,14cyclictest27349-21cyclictest08:55:242
27364999464,8cyclictest181rcu_preempt10:28:172
27360999423,29cyclictest0-21swapper/109:14:401
27364999355,9cyclictest181rcu_preempt10:56:242
27360999326,26cyclictest32372-21seq12:28:171
2736499923,63cyclictest4622-21apt-get11:45:132
27356999275,11cyclictest19343-21unixbench_singl08:20:360
27356999273,12cyclictest16089-21unixbench_singl08:10:350
2722029223,47sleep30-21swapper/307:09:593
27364999174,12cyclictest27349-21cyclictest10:45:332
27360999130,21cyclictest9744-21ssh10:11:121
27360999121,36cyclictest353-21runrttasks08:26:431
27360999121,36cyclictest353-21runrttasks08:26:431
27360999121,31cyclictest4064-21apt-get11:45:091
270282918,57sleep227030-21sshd07:07:252
2736499903,61cyclictest27123-21apt-get12:20:162
2736499903,61cyclictest27123-21apt-get12:20:162
27360999018,30cyclictest0-21swapper/109:55:311
2735699903,61cyclictest985-21/usr/sbin/munin09:05:290
2735699903,61cyclictest985-21/usr/sbin/munin09:05:290
27364998946,14cyclictest181rcu_preempt11:23:582
27364998946,14cyclictest181rcu_preempt11:23:582
27364998942,24cyclictest0-21swapper/209:05:222
27364998942,24cyclictest0-21swapper/209:05:222
27360998928,31cyclictest2070-21taskset10:00:151
27360998923,36cyclictest353-21runrttasks09:29:221
27356998956,13cyclictest181rcu_preempt11:55:330
27356998956,13cyclictest181rcu_preempt11:55:330
27356998954,25cyclictest0-21swapper/011:00:230
2735699893,61cyclictest20241-21apt-get08:25:250
2735699893,61cyclictest20241-21apt-get08:25:250
27364998847,8cyclictest181rcu_preempt11:10:552
27364998846,9cyclictest181rcu_preempt07:10:142
27364998843,15cyclictest181rcu_preempt11:58:122
27364998843,15cyclictest181rcu_preempt11:58:122
27360998825,21cyclictest32400-21seq11:37:391
27360998825,21cyclictest32400-21seq11:37:391
27356998858,15cyclictest181rcu_preempt07:30:100
27356998853,13cyclictest181rcu_preempt08:35:210
27356998850,28cyclictest0-21swapper/011:05:220
27360998727,25cyclictest2329-21ssh12:31:251
27360998727,25cyclictest2329-21ssh12:31:251
27360998727,20cyclictest7068-21seq10:07:281
27360998715,31cyclictest0-21swapper/110:55:011
27356998767,10cyclictest0-21swapper/007:25:010
27356998760,9cyclictest181rcu_preempt10:34:310
27364998665,10cyclictest0-21swapper/208:15:012
27364998646,8cyclictest181rcu_preempt09:10:152
27360998626,26cyclictest4014-21seq11:44:521
27360998625,22cyclictest31140-21seq08:58:371
27360998619,39cyclictest6779-21grep07:45:021
27356998660,8cyclictest181rcu_preempt10:50:350
27356998655,9cyclictest181rcu_preempt08:45:330
27356998655,9cyclictest181rcu_preempt08:45:330
27356998558,8cyclictest181rcu_preempt09:28:240
27356998556,8cyclictest181rcu_preempt08:15:250
27356998549,26cyclictest0-21swapper/011:55:000
27356998538,29cyclictest0-21swapper/007:15:050
27356998535,24cyclictest11980-21ls09:25:010
27356998535,24cyclictest11980-21ls09:25:010
27364998446,9cyclictest181rcu_preempt11:40:022
27360998424,24cyclictest18735-21ssh09:35:171
27360998424,24cyclictest18735-21ssh09:35:171
27360998419,27cyclictest0-21swapper/111:16:221
27356998461,15cyclictest31408-21latency_hist09:00:010
27356998456,8cyclictest181rcu_preempt09:38:250
27356998456,8cyclictest181rcu_preempt09:38:250
27356998450,12cyclictest181rcu_preempt08:05:190
27356998443,8cyclictest181rcu_preempt10:03:120
27356998441,35cyclictest0-21swapper/011:11:250
27364998363,10cyclictest0-21swapper/207:45:002
27364998352,9cyclictest181rcu_preempt10:07:522
27364998334,8cyclictest181rcu_preempt12:15:492
27364998332,21cyclictest25937-21timerwakeupswit09:45:352
27360998333,40cyclictest0-21swapper/109:30:111
27360998327,22cyclictest11557-21apt-get10:15:121
27360998325,27cyclictest2310-21diskmemload11:07:081
27360998325,26cyclictest28874-21seq07:14:531
27360998325,25cyclictest6736-21seq12:39:441
27360998324,22cyclictest24716-21seq08:39:051
27360998322,25cyclictest8121-21seq07:49:221
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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