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2026-05-14 - 08:05

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 Thu May 14, 2026 00:45:08)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
419399572,41cyclictest17529-21ssh21:25:112
417499543,38cyclictest19692-21ssh22:20:120
418299471,35cyclictest2125-21ssh23:40:131
4174994641,3cyclictest1501-21ssh22:10:130
417499433,31cyclictest22524-21diskmemload00:00:110
4193994112,23cyclictest8624-21rm23:42:342
417499411,3cyclictest131rcu_preempt21:20:140
418299388,25cyclictest16482-21ssh23:30:111
420199372,21cyclictest35966irq/58-eth021:55:123
4201993720,10cyclictest0-21swapper/322:30:133
418299373,31cyclictest24894-21ssh22:05:121
418299370,34cyclictest25513-21ssh23:35:131
417499371,31cyclictest6825-21ssh21:55:110
4174993622,6cyclictest12-21ksoftirqd/021:30:120
418299352,31cyclictest930-21snmpd21:15:131
418299351,30cyclictest0-21swapper/120:40:121
419399348,16cyclictest27346irq/40-dwc2_hso23:30:112
419399341,25cyclictest22934-21ssh21:10:152
417499342,20cyclictest30184-21ssh21:50:110
420199334,17cyclictest35966irq/58-eth022:35:123
420199333,18cyclictest35966irq/58-eth023:20:133
420199332,18cyclictest35966irq/58-eth000:15:103
419399339,11cyclictest29134-21diskmemload23:55:132
419399332,24cyclictest28825-21ssh00:10:412
419399332,24cyclictest28825-21ssh00:10:412
418299336,9cyclictest131rcu_preempt22:40:121
417499333,3cyclictest131rcu_preempt21:25:120
420199324,21cyclictest35966irq/58-eth022:00:123
4201993215,11cyclictest0-21swapper/300:06:453
4201993214,13cyclictest35966irq/58-eth023:50:133
420199321,21cyclictest35966irq/58-eth022:55:133
4193993215,3cyclictest0-21swapper/223:35:122
419399321,18cyclictest21711-21ssh23:15:142
419399321,14cyclictest27541-21ssh00:30:122
418299322,26cyclictest30208-21ssh21:50:131
418299321,24cyclictest0-21swapper/123:15:131
4174993218,9cyclictest536-21usb-storage22:50:120
418299316,4cyclictest131rcu_preempt00:25:121
4182993114,3cyclictest21-21ksoftirqd/123:55:131
417499311,21cyclictest2114-21ssh23:40:120
4201993015,12cyclictest0-21swapper/300:20:133
420199301,22cyclictest35966irq/58-eth020:20:123
420199301,17cyclictest35966irq/58-eth023:45:143
419399302,21cyclictest27-21ksoftirqd/223:45:442
419399293,21cyclictest18538-21apt-get00:25:132
419399292,11cyclictest14529-21rm00:20:452
419399291,18cyclictest27346irq/40-dwc2_hso23:05:112
4193992911,14cyclictest261rcuc/220:40:142
418299297,17cyclictest21-21ksoftirqd/121:05:111
4201992820,4cyclictest0-21swapper/320:00:123
419399282,10cyclictest8072-21ssh00:18:472
417499282,21cyclictest26037-21sshd00:28:420
417499282,20cyclictest2022-21ssh23:20:260
417499282,19cyclictest4932-21ssh22:45:440
4201992710,11cyclictest0-21swapper/300:38:583
419399278,4cyclictest27-21ksoftirqd/220:10:262
419399273,19cyclictest27346irq/40-dwc2_hso20:35:132
419399273,16cyclictest27346irq/40-dwc2_hso20:15:152
419399272,9cyclictest13311-21ssh00:03:442
419399272,16cyclictest27346irq/40-dwc2_hso21:50:122
419399271,17cyclictest30756-21ssh23:20:142
4193992710,8cyclictest27346irq/40-dwc2_hso21:15:142
418299271,4cyclictest0-21swapper/120:15:141
420199266,10cyclictest35966irq/58-eth020:40:123
420199264,14cyclictest0-21swapper/323:15:143
420199263,16cyclictest0-21swapper/300:30:133
420199262,16cyclictest0-21swapper/323:05:123
420199261,13cyclictest0-21swapper/322:05:123
419399266,14cyclictest8549-21apt-get21:20:132
419399263,4cyclictest131rcu_preempt20:50:122
4193992615,8cyclictest0-21swapper/223:29:122
418299263,19cyclictest21-21ksoftirqd/100:35:131
418299262,17cyclictest3650-21ssh23:05:131
417499263,16cyclictest15854-21ssh22:00:120
4174992615,7cyclictest121ksoftirqd/021:10:140
420199254,14cyclictest0-21swapper/321:25:133
420199253,15cyclictest0-21swapper/300:28:423
420199252,15cyclictest0-21swapper/323:55:133
419399253,17cyclictest27346irq/40-dwc2_hso23:50:132
419399253,11cyclictest131rcu_preempt00:05:172
419399252,8cyclictest3023-21ssh23:04:442
419399252,15cyclictest27346irq/40-dwc2_hso22:55:132
418299252,21cyclictest30536-21sh00:12:441
418299252,21cyclictest30536-21sh00:12:441
418299251,20cyclictest1475-21ssh22:10:111
417499252,5cyclictest131rcu_preempt21:15:130
417499252,18cyclictest26512-21ssh23:52:240
417499251,18cyclictest3073-21ssh21:35:120
420199243,14cyclictest0-21swapper/323:42:343
420199242,14cyclictest35966irq/58-eth023:10:133
420199242,14cyclictest35966irq/58-eth023:10:133
420199242,14cyclictest35966irq/58-eth022:25:123
419399249,6cyclictest13343-21grep21:00:162
419399246,4cyclictest27-21ksoftirqd/220:30:102
419399244,8cyclictest21175-21ssh21:45:132
419399242,12cyclictest27346irq/40-dwc2_hso19:20:122
4193992414,8cyclictest0-21swapper/222:35:132
4193992413,8cyclictest0-21swapper/222:52:552
4193992413,8cyclictest0-21swapper/221:55:122
419399241,16cyclictest0-21swapper/222:20:122
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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