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2025-11-07 - 14:40

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #4, slot #1

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.

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 rack4slot1s.osadl.org (updated Fri Nov 07, 2025 12:44:09)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3023421470,2sleep0171ktimers/010:53:350
3023421470,2sleep0171ktimers/010:53:350
844721450,3sleep30-21swapper/309:53:453
844721450,3sleep30-21swapper/309:53:453
240982740,7sleep024101-21grep09:08:480
240982740,7sleep024101-21grep09:08:480
287632720,3chrt28760-21if_err_wlan010:48:381
287632720,3chrt28760-21if_err_wlan010:48:381
176762630,3sleep30-21swapper/310:18:413
176762630,3sleep30-21swapper/310:18:413
273082590,3chrt0-21swapper/307:53:383
1179899575,37cyclictest1332-21ntpd07:28:380
1179899575,37cyclictest1332-21ntpd07:28:380
11798995422,23cyclictest171ktimers/010:13:310
11798995422,23cyclictest171ktimers/010:13:310
229812530,2sleep123137-21if_wlan010:33:391
11799995328,16cyclictest281ktimers/109:53:331
11799995328,16cyclictest281ktimers/109:53:331
174702510,2sleep117473-21cut08:53:371
323432500,3sleep20-21swapper/212:23:382
1179999502,7cyclictest181rcu_preempt11:48:371
1179999502,7cyclictest181rcu_preempt11:48:371
11798995015,28cyclictest0-21swapper/009:03:340
11798995015,28cyclictest0-21swapper/009:03:340
151852480,3chrt0-21swapper/308:48:293
151852480,3chrt0-21swapper/308:48:293
1179899482,34cyclictest32369-21runrttasks09:33:340
1179899482,34cyclictest32369-21runrttasks09:33:340
11798994823,20cyclictest171ktimers/010:18:330
11798994823,20cyclictest171ktimers/010:18:330
179502470,3sleep20-21swapper/211:43:462
1179999472,5cyclictest181rcu_preempt07:58:351
1179999472,5cyclictest181rcu_preempt07:58:351
11798994723,17cyclictest171ktimers/008:18:330
11798994723,17cyclictest171ktimers/008:18:330
11798994710,28cyclictest0-21swapper/009:43:340
11798994710,28cyclictest0-21swapper/009:43:340
11798994619,20cyclictest0-21swapper/007:53:330
273582450,2sleep10-21swapper/109:18:421
11798994531,10cyclictest14898-21apt-get11:38:360
11798994531,10cyclictest14898-21apt-get11:38:360
49922430,3sleep30-21swapper/312:38:223
49922430,3sleep30-21swapper/312:38:223
1180099432,25cyclictest14901-21taskset11:38:352
1180099432,25cyclictest14901-21taskset11:38:352
11798994332,6cyclictest0-21swapper/011:13:380
11798994332,6cyclictest0-21swapper/011:13:380
11798994318,19cyclictest171ktimers/012:28:330
11798994318,19cyclictest171ktimers/012:28:330
11799994234,4cyclictest0-21swapper/110:28:361
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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