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2026-07-07 - 16:58

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 Tue Jul 07, 2026 12:45:21)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
116686899921,87cyclictest1245442-21ssh11:41:170
116686899883,8cyclictest1258927-21munin-run12:10:000
1166868998727,56cyclictest1227996-21ssh11:04:570
1166868998426,40cyclictest1232346-21ssh11:13:570
1166868998376,3cyclictest0-21swapper/007:25:020
1166868998328,51cyclictest1253840-21ssh11:59:170
1166868998328,51cyclictest1233316-21ssh11:15:460
1166868998328,37cyclictest1195640-21ssh09:56:560
1166868998128,36cyclictest1197748-21ssh10:01:120
1166868998029,33cyclictest1179579-21ssh09:23:210
116686899802,6cyclictest1237584-21munin-run11:25:010
1166868997930,44cyclictest16950irq/224-800000012:15:010
1166868997820,39cyclictest1204991-21ssh10:16:320
1166868997724,48cyclictest1199781-21ssh10:05:260
1166868997722,51cyclictest1216385-21ssh10:40:030
116686899751,56cyclictest1185418-21ssh09:35:170
116686899749,6cyclictest16850irq/134-800000010:54:480
1166868997436,34cyclictest16950irq/224-800000007:40:000
1166868997436,21cyclictest1247585-21ssh11:45:470
116686899742,6cyclictest3467602-21systemd-journal12:02:510
116686899741,68cyclictest1240033-21date11:30:010
1166868997332,37cyclictest16950irq/224-800000012:25:010
1166868997331,38cyclictest1193737-21ssh09:52:580
1166868997330,24cyclictest1219659-21ssh10:47:140
1166879997227,40cyclictest275-21dbus-daemon10:35:013
116686899721,52cyclictest1174845-21ssh09:13:350
1166868997127,26cyclictest1268304-21ssh12:29:260
116686899711,6cyclictest1213653-21ssh10:34:560
116686899711,2cyclictest0-21swapper/011:07:280
1166879996929,34cyclictest1-21systemd12:40:013
1166879996923,9cyclictest1255886-21sshd12:03:283
1166868996927,26cyclictest1191971-21ssh09:49:260
1166868996914,51cyclictest16850irq/134-800000010:23:030
116686899691,12cyclictest1204090-21ssh10:15:000
116687299685,11cyclictest23-21ksoftirqd/107:20:001
116686899682,16cyclictest1172015-21sshd08:46:280
1166868996715,47cyclictest16850irq/134-800000012:36:020
1166868996659,3cyclictest0-21swapper/007:45:020
1166868996659,3cyclictest0-21swapper/007:45:020
1166868996630,33cyclictest0-21swapper/012:35:010
1166868996629,33cyclictest1177442-21ssh09:19:040
1166868996629,33cyclictest1177442-21ssh09:19:040
1166868996615,46cyclictest16850irq/134-800000009:41:320
116686899661,4cyclictest1210526-21ssh10:28:030
1166872996529,12cyclictest23-21ksoftirqd/108:40:001
116686899651,58cyclictest1263807-21unin-run12:20:010
1166868996511,49cyclictest16850irq/134-800000010:55:370
1166879996322,5cyclictest1167413-21latency_hist07:20:023
1166879996322,10cyclictest1185233-21sed09:35:023
1166879996318,11cyclictest37-21ksoftirqd/311:24:033
1166868996328,30cyclictest48-21kcompactd011:33:300
116686899632,47cyclictest16950irq/224-800000010:40:020
116686899631,10cyclictest1167421-21latency_hist07:20:020
116687999623,19cyclictest1235329-21wc11:20:023
1166879996217,8cyclictest1259364-21sshd12:10:293
116686899629,12cyclictest1180883-21ssh09:25:510
116686899621,43cyclictest1159489-21kworker/u8:007:45:030
116686899621,12cyclictest48-21kcompactd009:30:250
116687999614,15cyclictest1242282-21modprobe11:35:003
116687999613,17cyclictest3467602-21systemd-journal07:50:003
116686899616,45cyclictest125067850ssh11:52:310
116686899612,6cyclictest1244671-21munin-run11:40:000
116686899612,5cyclictest1171025-21munin-run08:30:010
116686899612,55cyclictest1171492-21sshd08:38:280
1166879996040,15cyclictest1-21systemd09:40:013
1166879996024,5cyclictest1193664-21sh09:52:493
1166879996022,6cyclictest1206799-21latency_hist10:20:023
1166872996012,7cyclictest131rcu_preempt11:40:011
116686899601,8cyclictest1171772-21sshd08:43:280
116686899601,13cyclictest1172276-21sshd08:53:280
1166879995925,31cyclictest1243605-21sh11:37:283
116687999591,17cyclictest1180327-21cat09:25:013
1166877995951,5cyclictest1199478-21kworker/2:210:35:022
1166868995929,27cyclictest12-21ksoftirqd/007:15:010
116686899592,13cyclictest1172594-21munin-run09:00:010
116686899592,13cyclictest1172594-21munin-run09:00:010
1166868995910,44cyclictest1169979-21unin-run08:10:010
116687999585,18cyclictest3467602-21systemd-journal10:30:033
1166879995828,25cyclictest1263606-21sh12:19:423
1166879995825,30cyclictest1267320-21sh12:27:123
1166879995815,12cyclictest120-21kswapd010:45:003
1166879995813,7cyclictest1168386-21cron07:40:003
1166879995812,14cyclictest275-21dbus-daemon10:50:013
1166877995849,6cyclictest1159521-21kworker/2:309:13:432
116686899581,15cyclictest1169477-21munin-run08:00:010
116686899581,15cyclictest1169477-21munin-run08:00:010
116686899581,10cyclictest48-21kcompactd009:05:210
1166879995723,7cyclictest37-21ksoftirqd/311:09:293
116687999572,19cyclictest1173385-21ssh09:10:093
1166879995720,7cyclictest37-21ksoftirqd/309:59:493
116686899573,6cyclictest1170450-21sshd08:17:270
116686899573,6cyclictest1170450-21sshd08:17:270
116687999562,9cyclictest1170477-21modprobe08:20:003
116687999562,9cyclictest1170477-21modprobe08:20:003
1166879995626,26cyclictest1214586-21sh10:36:333
116687999562,20cyclictest1167241-21cat07:15:023
1166879995620,9cyclictest37-21ksoftirqd/312:00:003
1166879995615,9cyclictest1167600-21date07:20:033
1166877995647,5cyclictest1159521-21kworker/2:307:10:012
1166877995635,15cyclictest3467602-21systemd-journal10:44:592
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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