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2026-06-03 - 04:16

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, 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 50 highest latencies:
System rack0slot3s.osadl.org (updated Wed Jun 03, 2026 00:44:43)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
28864082282221,31sleep20-21swapper/219:08:072
28841742267219,16sleep40-21swapper/419:05:044
28863702259218,17sleep30-21swapper/319:07:363
28864402258211,17sleep00-21swapper/019:08:300
28862622255211,15sleep60-21swapper/619:06:186
28863002248223,16sleep70-21swapper/719:06:527
28863032245219,17sleep10-21swapper/119:06:541
28862602245221,16sleep50-21swapper/519:06:175
29603212940,1sleep2391rcuc/221:30:362
28957662810,0sleep30-21swapper/319:30:113
2886824993210,22cyclictest0-21swapper/420:49:214
2886839993130,1cyclictest0-21swapper/722:20:217
2886812993130,1cyclictest2942284-21kworker/u32:4+kvfree_rcu_reclaim22:39:591
2886807993127,3cyclictest2895849-21cat19:30:120
288682499290,25cyclictest0-21swapper/421:28:434
2886829992822,2cyclictest0-21swapper/523:50:175
2886807992827,1cyclictest0-21swapper/022:35:250
288683999270,27cyclictest0-21swapper/722:42:077
2886824992720,5cyclictest523-21systemd-journal21:52:334
2886824992720,5cyclictest523-21systemd-journal00:06:134
288682199270,1cyclictest0-21swapper/322:54:523
288681299270,26cyclictest3003776-21cat22:50:171
288680799270,25cyclictest0-21swapper/023:06:350
288680799270,25cyclictest0-21swapper/020:25:410
288683999260,22cyclictest0-21swapper/720:45:097
2886833992622,3cyclictest1391-21snmpd23:31:296
288683399260,24cyclictest2902403-21strings19:45:186
288683399260,22cyclictest0-21swapper/621:30:466
288683399260,22cyclictest0-21swapper/619:58:376
288682999269,12cyclictest0-21swapper/519:55:165
2886829992622,3cyclictest1391-21snmpd22:30:185
2886829992620,6cyclictest1391-21snmpd22:58:355
288682499267,17cyclictest0-21swapper/420:35:164
288682499260,24cyclictest0-21swapper/423:45:144
288682499260,24cyclictest0-21swapper/422:22:414
288682499260,24cyclictest0-21swapper/422:00:164
288682499260,24cyclictest0-21swapper/420:59:014
288682499260,24cyclictest0-21swapper/419:42:414
288681299260,25cyclictest0-21swapper/120:06:401
288681299260,22cyclictest0-21swapper/123:23:531
288681299260,22cyclictest0-21swapper/122:59:401
288681299260,22cyclictest0-21swapper/121:50:171
2886839992521,2cyclictest0-21swapper/700:05:197
2886839992518,5cyclictest0-21swapper/719:48:527
288683999250,23cyclictest0-21swapper/719:50:147
288683999250,1cyclictest0-21swapper/723:25:157
2886833992521,3cyclictest1391-21snmpd19:35:396
2886833992518,5cyclictest0-21swapper/623:47:436
2886833992518,5cyclictest0-21swapper/619:28:096
2886829992521,3cyclictest1391-21snmpd22:19:215
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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