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2026-05-19 - 01:02

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #7, slot #4

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 rack7slot4s.osadl.org (updated Mon May 18, 2026 12:45:12)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2166699716,54cyclictest13843-21ssh10:25:140
2168699612,36cyclictest18114-21ssh12:15:132
21677996122,9cyclictest131rcu_preempt09:15:141
2166699503,39cyclictest20626-21ssh09:35:140
2166699482,40cyclictest1697-21ssh11:30:130
2167799421,35cyclictest12313-21ssh11:00:141
2168699413,29cyclictest11102-21sshd08:40:132
2166699406,30cyclictest12728-21ssh12:30:120
2168699382,19cyclictest7248-21timerwakeupswit10:55:332
2167799383,26cyclictest24986-21kworker/u8:112:25:121
21666993821,8cyclictest12-21ksoftirqd/010:10:140
21666993821,8cyclictest12-21ksoftirqd/010:10:140
2168699374,22cyclictest27346irq/40-dwc2_hso12:25:132
21666993729,5cyclictest0-21swapper/008:15:110
21666993720,10cyclictest7257-21diskmemload11:35:590
2169599364,14cyclictest0-21swapper/312:35:143
2168699363,21cyclictest27346irq/40-dwc2_hso11:15:132
2169599352,24cyclictest0-21swapper/308:40:123
21695993520,11cyclictest35966irq/58-eth009:40:143
2169599335,18cyclictest35966irq/58-eth010:45:133
21686993316,11cyclictest27-21ksoftirqd/211:45:122
2168699324,19cyclictest27346irq/40-dwc2_hso10:45:142
2168699321,15cyclictest28202-21ssh10:15:122
2166699321,25cyclictest4860-21rm10:20:140
2166699321,23cyclictest28686-21ssh11:45:130
21666993210,17cyclictest12770-1kworker/u9:211:20:120
2168699313,7cyclictest0-21swapper/209:15:132
2167799312,23cyclictest4193-21rm09:42:591
2167799312,22cyclictest25836-21ssh09:20:121
2167799310,25cyclictest0-21swapper/108:40:121
2166699312,26cyclictest8430-21ssh10:40:140
2166699312,23cyclictest6605-21ssh11:14:590
2166699312,22cyclictest32414-21cut09:40:200
2167799302,22cyclictest1316-21rm11:45:431
2166699302,10cyclictest131rcu_preempt10:45:280
2166699301,21cyclictest12-21ksoftirqd/011:25:110
21695992912,9cyclictest35966irq/58-eth011:20:123
2168699296,9cyclictest27-21ksoftirqd/210:10:142
2168699296,9cyclictest27-21ksoftirqd/210:10:132
2168699294,10cyclictest21657-21cyclictest09:20:112
2168699292,21cyclictest0-21swapper/209:05:142
21686992914,6cyclictest10535-21kworker/2:010:25:132
2168699281,15cyclictest27346irq/40-dwc2_hso11:40:112
2168699281,15cyclictest27346irq/40-dwc2_hso11:40:112
2167799283,17cyclictest7738-21ssh09:10:131
2167799282,13cyclictest0-21swapper/112:15:121
21666992813,5cyclictest12-21ksoftirqd/010:50:120
2168699272,17cyclictest27346irq/40-dwc2_hso08:25:122
2167799272,6cyclictest131rcu_preempt10:50:121
2166699274,16cyclictest25474-21sshd08:55:150
2169599264,15cyclictest0-21swapper/312:15:133
21695992610,9cyclictest0-21swapper/309:15:143
21695992610,8cyclictest35966irq/58-eth011:40:113
21695992610,8cyclictest35966irq/58-eth011:40:103
2168699262,13cyclictest32574-21kthreadcore09:40:212
21686992619,4cyclictest0-21swapper/210:35:132
21686992616,8cyclictest0-21swapper/212:30:142
21686992613,5cyclictest0-21swapper/211:10:132
2167799262,18cyclictest17433-21ssh10:45:151
2168699252,15cyclictest16108-21ssh11:20:112
2168699252,14cyclictest27214-21ssh12:20:172
2168699252,10cyclictest21683-21ssh12:35:142
21686992513,3cyclictest0-21swapper/208:00:152
21686992510,12cyclictest455-21irqcore07:55:172
2167799251,21cyclictest73-21kswapd010:30:131
2167799251,10cyclictest0-21swapper/111:40:111
2167799251,10cyclictest0-21swapper/111:40:101
2166699252,18cyclictest2442-21ssh09:25:130
2166699252,16cyclictest31817-21ssh10:35:130
21695992415,4cyclictest35966irq/58-eth009:55:113
2168699249,5cyclictest17141-21latency_hist10:45:012
2168699244,11cyclictest11450-21ntp_states09:10:282
2168699242,11cyclictest10714-21ssh11:35:132
2168699241,18cyclictest7257-21diskmemload10:51:002
2168699241,18cyclictest26178-21tr11:25:182
21686992411,6cyclictest7830-21sshd12:09:002
21686992411,6cyclictest7830-21sshd12:08:592
2168699241,11cyclictest13456-21tr09:30:202
21686992411,10cyclictest26249-21sshd09:55:202
2166699248,7cyclictest22803-21sh10:30:120
2166699241,7cyclictest26555-21kthreadcore09:55:200
21666992410,10cyclictest12-21ksoftirqd/012:00:130
2169599233,13cyclictest0-21swapper/312:30:143
2169599233,13cyclictest0-21swapper/311:45:443
2169599233,11cyclictest0-21swapper/310:15:133
21695992314,8cyclictest33-21ksoftirqd/310:50:123
2168699232,18cyclictest22775-21/usr/sbin/munin10:30:312
2168699232,17cyclictest14417-21ssh11:55:142
2168699232,16cyclictest9090-21find11:50:272
2168699232,16cyclictest0-21swapper/211:00:592
2168699232,12cyclictest21031-21sed09:35:192
2168699232,10cyclictest11665-21kthreadcore12:10:232
2168699231,8cyclictest4420-21kthreadcore09:25:212
21686992312,9cyclictest0-21swapper/211:05:202
21686992312,8cyclictest8854-21kthreadcore09:45:222
2168699231,18cyclictest23960-21ps12:00:192
2168699231,13cyclictest10145-21apt-get10:05:132
2168699231,13cyclictest10145-21apt-get10:05:122
2167799233,16cyclictest10729-21ssh11:35:151
2167799232,2cyclictest131rcu_preempt12:20:171
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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