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2026-09-20 - 07:04

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #1, 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 here to display the system's profile data or here to proceed to next system.
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, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rack1slot3s.osadl.org (updated Sun Sep 20, 2026 00:43:40)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
57799211143,34mali-event-hand0-21swapper/119:11:271
1124836995645,7cyclictest70-21kauditd22:26:402
1124838994922,16cyclictest1124833-21cyclictest23:16:514
1124834994921,14cyclictest1224828-21cat22:51:400
112483499484,28cyclictest51450weston23:40:380
112483499482,23cyclictest0-21swapper/023:11:320
1124834994822,13cyclictest1142287-21unix_chkpwd20:01:400
1124834994822,13cyclictest1142287-21unix_chkpwd20:01:400
1124834994729,16cyclictest1270048-21kworker/u24:0-xprtiod00:26:510
1124834994718,13cyclictest51450weston00:14:380
112483499469,34cyclictest1126797-21cat19:16:410
1124834994633,2cyclictest0-21swapper/020:31:400
112483499461,14cyclictest1288065-21cron00:41:400
57799451,3mali-event-hand0-21swapper/320:18:273
1124837994538,5cyclictest551-21in:imklog22:16:403
112483499451,19cyclictest1219389-21/usr/sbin/munin22:42:010
1124834994433,5cyclictest191rcu_preempt21:27:040
1124834994425,4cyclictest191rcu_preempt22:02:100
1124834994425,4cyclictest191rcu_preempt22:02:100
112483499442,27cyclictest1219041-21ls22:41:400
112483499442,27cyclictest1219041-21ls22:41:400
1124834994418,17cyclictest0-21swapper/021:36:420
112483499441,40cyclictest1161547-21awk20:56:400
112483499441,40cyclictest1161547-21awk20:56:400
1124839994325,14cyclictest1153886-21ps20:32:175
1124839994325,14cyclictest1153886-21ps20:32:175
112483899435,34cyclictest1282930-21cut00:32:024
1124838994226,7cyclictest191rcu_preempt23:31:404
1124838994220,6cyclictest191rcu_preempt23:36:414
1124838994220,14cyclictest1124833-21cyclictest20:22:174
1124838994220,14cyclictest1124833-21cyclictest20:22:174
1124838994213,21cyclictest56-21ksoftirqd/419:47:044
1124834994226,13cyclictest1135297-21apt-get19:41:400
1124834994221,7cyclictest191rcu_preempt23:52:120
1124834994213,21cyclictest1258208-21systemd-userwor23:49:150
112483499421,10cyclictest16-21ksoftirqd/023:31:400
1124836994133,6cyclictest1124833-21cyclictest19:41:402
112483499418,22cyclictest191rcu_preempt21:58:420
1124834994135,4cyclictest1241758-21kworker/u24:2-kvfree_rcu_reclaim23:23:070
1124834994135,4cyclictest1241758-21kworker/u24:2-kvfree_rcu_reclaim23:23:070
1124834994133,6cyclictest1130052-21systemd-userwor19:29:400
1124834994133,6cyclictest1130052-21systemd-userwor19:29:400
1124834994130,9cyclictest1212205-21systemd-userwor22:32:030
1124834994128,5cyclictest1210662-21wc22:26:410
1124834994120,17cyclictest1159798-21awk20:51:390
112483499411,6cyclictest1227639-21cron22:56:400
1124838994026,7cyclictest191rcu_preempt00:37:044
1124838994020,4cyclictest191rcu_preempt21:41:414
1124838994013,17cyclictest56-21ksoftirqd/420:27:134
1124838994013,17cyclictest0-21swapper/400:17:134
1124835994029,8cyclictest1207070-21kworker/u24:3+nfsiod22:59:491
112483499403,5cyclictest16-21ksoftirqd/000:26:410
1124834994025,9cyclictest0-21swapper/019:21:400
1124834994023,9cyclictest16-21ksoftirqd/000:11:400
112483499402,35cyclictest1156319-21sendmail20:41:400
1124834994019,10cyclictest1250955-21date23:36:410
1124834994014,16cyclictest514-21weston22:10:380
1124838993923,7cyclictest191rcu_preempt21:26:554
1124838993922,8cyclictest191rcu_preempt22:12:134
1124837993920,15cyclictest1132172-21cpu19:31:593
1124836993931,5cyclictest0-21swapper/221:16:402
1124836993931,5cyclictest0-21swapper/221:16:402
1124834993921,9cyclictest0-21swapper/019:46:400
1124834993915,9cyclictest191rcu_preempt21:06:410
112483499391,34cyclictest1268003-21cat00:06:410
112483499391,34cyclictest1213411-21ssh22:31:410
112483499391,10cyclictest1202070-21ssh22:11:430
112483899387,16cyclictest1255374-21sh23:42:394
1124838993829,6cyclictest1166798-21idleruntime-cro21:11:394
1124838993825,5cyclictest191rcu_preempt23:05:004
1124838993821,13cyclictest1164287-21ntpq21:02:114
1124838993818,12cyclictest1141270-21kernelversion19:57:054
1124838993818,12cyclictest1141270-21kernelversion19:57:054
1124838993818,11cyclictest56-21ksoftirqd/420:57:024
1124838993814,12cyclictest0-21swapper/420:37:194
1124837993832,4cyclictest0-21swapper/319:41:403
1124837993824,10cyclictest1274932-21grep00:17:183
1124837993816,9cyclictest1267319-21sshd-session00:04:173
1124835993831,5cyclictest0-21swapper/100:37:221
1124835993820,13cyclictest1285191-21cron00:36:401
1124834993829,7cyclictest1229946-21systemd-userwor23:02:130
112483499382,25cyclictest16-21ksoftirqd/023:12:420
112483499382,25cyclictest16-21ksoftirqd/023:12:420
1124834993820,9cyclictest0-21swapper/020:21:410
112483499381,9cyclictest1138843-21latency_hist19:51:400
1124834993818,10cyclictest0-21swapper/022:21:410
112483499381,11cyclictest16-21ksoftirqd/023:21:380
1124839993728,6cyclictest0-21swapper/521:46:405
1124839993728,6cyclictest0-21swapper/521:46:405
1124839993728,6cyclictest0-21swapper/521:46:405
1124839993723,10cyclictest1173411-21sed21:22:045
1124839993723,10cyclictest1173411-21sed21:22:045
1124839993722,11cyclictest1179207-21ls21:32:015
1124839993719,12cyclictest1227004-21systemd-userwor22:54:145
1124838993725,5cyclictest191rcu_preempt22:49:464
1124838993721,9cyclictest191rcu_preempt21:17:124
1124838993721,7cyclictest191rcu_preempt22:11:404
1124838993721,7cyclictest191rcu_preempt00:22:054
1124838993721,7cyclictest191rcu_preempt00:22:054
1124838993719,8cyclictest191rcu_preempt23:12:054
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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