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2026-09-12 - 15:33
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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 Sep 12, 2026 12:44:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2556821307,15sleep00-21swapper/007:08:040
2556821307,15sleep00-21swapper/007:08:040
25827991153,81cyclictest26884-21apt-get10:44:390
258379910944,10cyclictest0-21swapper/209:49:372
258279910769,20cyclictest0-21swapper/009:29:530
258379910646,13cyclictest1-21systemd11:40:412
258379910639,12cyclictest0-21swapper/211:29:242
24511210611,67sleep124512-21diskstats07:04:471
24511210611,67sleep124512-21diskstats07:04:471
258379910342,13cyclictest0-21swapper/210:19:252
258379910027,26cyclictest5620-21timerwakeupswit11:54:582
258379910027,26cyclictest5620-21timerwakeupswit11:54:582
2583799999,73cyclictest27045-21ssh10:44:592
25837999678,12cyclictest8129-21latency_hist10:14:222
245132948,56sleep224562-21fschecks_count07:04:482
245132948,56sleep224562-21fschecks_count07:04:482
2583099937,55cyclictest6181-21kworker/u19:0+ext4-rsv-conversion11:59:391
25827999173,12cyclictest317-21dbus-daemon10:19:210
25827999060,20cyclictest6232-21ssh11:04:220
25827999060,20cyclictest6232-21ssh11:04:220
2583799892,67cyclictest1576-21kworker/u17:1+ext4-rsv-conversion11:50:482
2583799892,67cyclictest1576-21kworker/u17:1+ext4-rsv-conversion11:50:482
25830998922,30cyclictest343-21runrttasks11:18:091
25830998922,30cyclictest343-21runrttasks11:18:091
25830998912,39cyclictest0-21swapper/109:26:471
25830998912,39cyclictest0-21swapper/109:26:471
25827998967,14cyclictest16894-21latency_hist08:19:250
25837998865,15cyclictest200-21systemd-journal12:36:412
25830998823,25cyclictest5399-21seq11:02:041
25830998823,25cyclictest5399-21seq11:02:041
25827998712,66cyclictest2484-21ssh10:04:450
189502860,20sleep018924-21sh11:24:450
25837998562,17cyclictest9158-21fschecks_count07:54:432
25837998562,17cyclictest9158-21fschecks_count07:54:432
25837998558,20cyclictest22798-21netstat09:44:492
2583099853,69cyclictest10240-21kworker/u17:0+ext4-rsv-conversion11:50:261
2583099853,69cyclictest10240-21kworker/u17:0+ext4-rsv-conversion11:50:261
25830998525,25cyclictest18211-21seq08:21:511
25830998521,31cyclictest31383-21runrttasks12:38:071
2584399848,59cyclictest0-21swapper/309:50:023
2584399844,37cyclictest0-21swapper/310:44:463
25837998453,13cyclictest181rcu_preempt10:39:352
25837998453,13cyclictest181rcu_preempt10:39:352
25837998453,12cyclictest58-21kcompactd012:19:282
25837998453,12cyclictest58-21kcompactd012:19:282
25830998423,25cyclictest392-21seq09:08:151
25827998462,8cyclictest181rcu_preempt07:39:400
25827998429,31cyclictest15-21ksoftirqd/008:54:210
25827998429,31cyclictest15-21ksoftirqd/008:54:210
25837998360,17cyclictest521-21apt-key07:29:252
25837998360,17cyclictest521-21apt-key07:29:252
25837998345,16cyclictest181rcu_preempt07:47:092
25830998322,23cyclictest27317-21seq07:14:161
25830998322,23cyclictest27317-21seq07:14:161
25830998321,29cyclictest5320-21ssh09:15:581
25830998321,24cyclictest1296-21cat11:49:251
25830998321,24cyclictest1296-21cat11:49:251
25830998320,23cyclictest0-21swapper/107:57:251
25830998320,23cyclictest0-21swapper/107:57:251
25830998319,28cyclictest0-21swapper/110:05:431
25827998364,11cyclictest6882-21sh09:19:310
25827998355,11cyclictest181rcu_preempt07:34:410
2582799834,59cyclictest1086-21apt-get11:49:370
2582799834,59cyclictest1086-21apt-get11:49:370
25827998328,30cyclictest15-21ksoftirqd/008:59:590
25837998266,11cyclictest25811-21cyclictest08:59:442
25837998246,11cyclictest181rcu_preempt11:09:572
2583799823,66cyclictest2423-21apt-get10:04:412
25830998222,30cyclictest17946-21seq09:36:451
25830998222,29cyclictest200-21systemd-journal12:29:411
25830998221,23cyclictest27779-21seq08:50:261
25830998221,23cyclictest27779-21seq08:50:261
25830998218,28cyclictest0-21swapper/110:34:531
25837998162,12cyclictest5504-21idleruntime-cro07:44:222
25837998159,16cyclictest14211-21latency_hist10:24:242
25830998159,15cyclictest506-21diskmemload12:10:381
25830998121,32cyclictest506-21diskmemload11:24:161
25830998121,29cyclictest0-21swapper/111:58:041
25830998121,29cyclictest0-21swapper/111:58:041
25830998114,31cyclictest11896-21chrt12:04:581
25830998114,31cyclictest11896-21chrt12:04:581
25837998028,16cyclictest12875-21ssh09:29:252
25837998028,16cyclictest12875-21ssh09:29:252
25830998059,12cyclictest24974-21cut09:49:221
25830998023,24cyclictest8023-21seq10:14:061
25830998023,20cyclictest29812-21seq09:55:261
25830998020,24cyclictest19841-21seq08:27:091
25830998020,24cyclictest19841-21seq08:27:091
25830998018,33cyclictest343-21runrttasks09:52:051
25830998017,25cyclictest0-21swapper/108:09:511
25830998014,30cyclictest0-21swapper/110:45:251
25830998013,33cyclictest0-21swapper/112:15:411
25827998059,14cyclictest506-21diskmemload11:23:400
25827998045,26cyclictest0-21swapper/011:14:210
2583799794,39cyclictest29404-21apt-get07:19:372
2583799792,19cyclictest29626-21kworker/2:0-mm_percpu_wq11:46:192
2583799792,19cyclictest29626-21kworker/2:0-mm_percpu_wq11:46:192
25837997921,13cyclictest0-21swapper/207:49:352
25830997961,12cyclictest19207-21ssh10:31:321
25830997954,14cyclictest27960-21kworker/u18:2+rpciod09:29:501
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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