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2026-07-04 - 16:20

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, slot #3

Rack #0/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #1/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #2/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #3/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #4/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #5/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #6/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #7/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #8/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #9/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #a/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #b/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #c/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #d/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #e/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #f/#0 #1 #2 #3 #4 #5 #6 #7 #8 
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Click on a legend element to toggle display of that core, ctrl-click inverts display, shift-click enables all.

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
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rackeslot3s.osadl.org (updated Sat Jul 04, 2026 12:45:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
185081991423,7cyclictest131rcu_preempt10:15:023
185081991423,7cyclictest131rcu_preempt10:15:023
185071999285,3cyclictest150-21pr/ttyS208:00:030
18507199760,36cyclictest0-21swapper/008:05:010
18507199760,36cyclictest0-21swapper/008:05:010
18507199754,54cyclictest236351-21ssh10:45:020
185071997429,5cyclictest0-21swapper/010:38:360
18507199736,41cyclictest0-21swapper/011:35:260
185074997247,13cyclictest189232-21kworker/u8:108:30:021
185071997152,16cyclictest16950irq/224-800000010:52:500
185074997018,14cyclictest275-21dbus-daemon09:40:011
185081996826,38cyclictest275-21dbus-daemon12:30:013
185074996825,5cyclictest214449-21sh09:59:151
185074996713,12cyclictest275-21dbus-daemon12:00:021
18507199668,33cyclictest194127-21rm09:15:420
185081996523,4cyclictest202701-21sh09:34:193
185081996523,4cyclictest202701-21sh09:34:193
18507199650,35cyclictest0-21swapper/010:35:020
18508199649,16cyclictest290084-21sendmail12:40:013
185074996426,33cyclictest274-21cron12:30:011
185074996423,6cyclictest235088-21sh10:42:341
18507499641,22cyclictest238473-21ssh10:50:011
185081996323,10cyclictest0-21swapper/310:25:003
185074996319,5cyclictest0-21swapper/111:24:011
18507199632,44cyclictest250799-21ssh11:15:570
185081996226,32cyclictest190060-21pluginstate08:45:013
185081996224,4cyclictest234346-21sh10:40:453
185081996219,9cyclictest275-21dbus-daemon10:40:013
185081996219,4cyclictest191335-21diskmemload09:20:253
185081996219,4cyclictest191335-21diskmemload09:20:253
185074996230,29cyclictest120-21kswapd010:25:011
185074996223,7cyclictest188995-21sshd08:24:441
185074996223,4cyclictest272378-21sh12:01:281
185074996218,5cyclictest259645-21latency_hist11:35:021
185071996210,15cyclictest282095-21ssh12:22:510
185081996120,8cyclictest37-21ksoftirqd/308:50:003
185074996120,5cyclictest191335-21diskmemload11:46:181
18507199619,18cyclictest218811-21ssh10:08:110
185071996115,8cyclictest12-21ksoftirqd/010:13:470
18508199604,20cyclictest212483-21unin-run09:55:013
185081996025,10cyclictest37-21ksoftirqd/310:47:173
185081996018,10cyclictest37-21ksoftirqd/307:45:443
185081996017,8cyclictest238881-1kworker/u9:010:52:503
185081996010,14cyclictest48-21kcompactd011:55:213
185074996025,32cyclictest221965-21sh10:15:011
185074996025,29cyclictest3467602-21systemd-journal09:09:591
185074996021,4cyclictest255565-21sh11:25:551
185074996020,5cyclictest191335-21diskmemload09:17:311
185074996019,5cyclictest261275-21rm11:38:191
18507199608,48cyclictest0-21swapper/011:41:410
185071996030,26cyclictest212465-21munin-run09:55:000
18508199593,14cyclictest195978-21cron09:19:593
185081995924,9cyclictest37-21ksoftirqd/309:39:583
185081995920,10cyclictest37-21ksoftirqd/311:29:443
185071995945,10cyclictest3467602-21systemd-journal11:30:010
185071995938,16cyclictest16850irq/134-800000010:26:290
185071995938,16cyclictest16850irq/134-800000010:26:280
185071995916,37cyclictest217224-21munin-run10:05:000
185071995915,8cyclictest286280-21ssh12:31:440
185081995822,4cyclictest189262-21latency_hist08:30:023
18508199582,17cyclictest229068-21cut10:30:003
18508199582,17cyclictest229068-21cut10:30:003
185081995819,8cyclictest37-21ksoftirqd/310:07:013
185077995850,5cyclictest176277-21kworker/2:110:37:432
185074995824,4cyclictest262815-21sh11:41:271
185074995823,7cyclictest23-21ksoftirqd/109:43:421
185074995823,7cyclictest23-21ksoftirqd/109:43:421
18507199589,16cyclictest199741-21rm09:27:490
18507199588,15cyclictest248300-21ssh11:10:310
185071995815,7cyclictest12-21ksoftirqd/009:24:010
185071995815,7cyclictest12-21ksoftirqd/009:24:000
185071995812,41cyclictest272777-21ssh12:02:290
185071995812,41cyclictest245523-21ssh11:05:000
185081995728,25cyclictest275414-21sh12:08:133
185081995726,28cyclictest37-21ksoftirqd/310:56:303
185081995726,28cyclictest37-21ksoftirqd/310:56:293
185074995721,4cyclictest227151-21sshd10:25:431
185074995721,4cyclictest227151-21sshd10:25:431
18507199575,35cyclictest276519-21ssh12:10:130
185071995712,13cyclictest213025-21ssh09:55:440
185081995624,4cyclictest246959-21sh11:07:593
185081995624,4cyclictest246959-21sh11:07:593
185081995622,5cyclictest309-21in:imuxsock07:30:003
185081995622,5cyclictest309-21in:imuxsock07:30:003
185081995622,4cyclictest191335-21diskmemload12:21:243
185081995622,12cyclictest37-21ksoftirqd/308:40:033
18508199562,20cyclictest261971-21cron11:40:003
185081995619,5cyclictest208983-21sh09:47:223
185074995639,13cyclictest275-21dbus-daemon12:39:321
185074995621,6cyclictest23-21ksoftirqd/111:54:591
185074995617,9cyclictest23-21ksoftirqd/110:05:491
185071995627,13cyclictest266429-21ssh11:49:160
185071995626,3cyclictest0-21swapper/012:18:360
185071995617,9cyclictest191335-21diskmemload12:36:440
185071995615,36cyclictest223588-21ssh10:18:300
185071995615,36cyclictest223588-21ssh10:18:290
185081995525,7cyclictest245416-21sh11:04:483
185081995522,10cyclictest37-21ksoftirqd/312:13:153
185081995520,6cyclictest190932-21latency_hist09:00:013
185081995519,4cyclictest249447-21sh11:13:153
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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