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2025-11-30 - 21:31

OSADL QA Farm on Real-time of Mainline Linux

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

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 50 highest latencies:
System rack7slot7s.osadl.org (updated Sun Nov 30, 2025 12:43:56)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
26788210982,9sleep30-21swapper/307:08:063
2667129481,9sleep10-21swapper/107:06:341
2669728864,13sleep20-21swapper/207:06:562
2687228269,9sleep00-21swapper/007:09:100
2702099230,22cyclictest0-21swapper/009:39:210
27024992221,1cyclictest0-21swapper/111:49:391
27020992221,1cyclictest0-21swapper/010:16:060
2702099210,6cyclictest0-21swapper/008:30:140
2703099200,19cyclictest0-21swapper/309:51:583
2702799201,1cyclictest19415-21tune2fs08:00:182
2702799201,19cyclictest0-21swapper/211:15:262
27030991916,2cyclictest39-21ksoftirqd/310:15:003
2702799191,16cyclictest0-21swapper/212:29:232
2702499190,19cyclictest0-21swapper/111:27:191
27020991918,1cyclictest0-21swapper/009:24:330
27020991818,0cyclictest0-21swapper/011:00:400
27020991818,0cyclictest0-21swapper/009:42:370
2702099181,10cyclictest4940-21ssh12:25:140
2703099170,2cyclictest0-21swapper/311:42:503
2703099170,2cyclictest0-21swapper/309:14:043
27020991714,2cyclictest31329-21ntp_states10:10:250
2702099171,1cyclictest141rcu_preempt12:20:590
2703099160,6cyclictest0-21swapper/308:50:153
27027991615,1cyclictest30973-21kworker/2:012:10:182
27027991613,3cyclictest37850irq/131-snd_hda10:30:292
2702799161,14cyclictest4552-21ssh12:00:552
2702499169,6cyclictest0-21swapper/109:20:541
2702499163,12cyclictest9883-21kworker/u8:011:52:031
2702099160,14cyclictest0-21swapper/009:27:180
27030991512,3cyclictest39-21ksoftirqd/311:15:303
27027991514,1cyclictest4144-21kworker/2:209:33:192
27027991514,1cyclictest32-21ksoftirqd/211:06:312
2702799151,11cyclictest0-21swapper/210:29:142
2702799150,2cyclictest0-21swapper/211:57:282
27024991512,2cyclictest801-21apt-get08:30:151
2702499150,2cyclictest0-21swapper/109:39:291
2702499150,1cyclictest0-21swapper/109:51:591
2702099150,14cyclictest0-21swapper/009:52:410
58992140,0chrt0-21swapper/110:15:391
2703099147,3cyclictest0-21swapper/312:29:553
2703099144,4cyclictest19647-21diskmemload10:55:223
2703099142,10cyclictest23642-21proc_pri10:30:253
27030991413,1cyclictest0-21swapper/311:47:513
27030991411,2cyclictest30024-21apt-get11:05:143
2703099140,4cyclictest0-21swapper/311:26:583
27027991413,1cyclictest0-21swapper/210:35:192
27027991411,2cyclictest0-21swapper/209:45:362
2702799140,14cyclictest0-21swapper/212:38:352
2702799140,14cyclictest0-21swapper/210:21:462
2702799140,13cyclictest0-21swapper/210:01:302
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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