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2026-09-23 - 01:41

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #1, slot #6

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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  Intel
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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
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rack1slot6s.osadl.org (updated Wed Sep 23, 2026 00:43:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2996621220,7sleep029965-21tr20:25:070
2583399999,25cyclictest0-21swapper/019:30:180
97152980,7sleep20-21swapper/217:50:332
2583399964,30cyclictest0-21swapper/020:20:240
2583399964,26cyclictest0-21swapper/020:10:110
2583399964,26cyclictest0-21swapper/020:10:110
25833999523,20cyclictest3659-21grep17:40:140
2583399935,13cyclictest0-21swapper/019:50:200
2583399934,27cyclictest0-21swapper/021:00:070
2583399934,27cyclictest0-21swapper/020:45:140
2583399924,27cyclictest0-21swapper/018:00:160
2583399914,27cyclictest0-21swapper/019:45:190
2583399913,24cyclictest5820-21munin-node22:15:050
2583399903,26cyclictest0-21swapper/021:12:010
2583399894,28cyclictest0-21swapper/021:05:100
2583399894,27cyclictest0-21swapper/022:20:090
2583399894,27cyclictest0-21swapper/019:40:080
2583399893,24cyclictest16185-21chrt20:52:200
2583399884,12cyclictest0-21swapper/021:48:010
25833998837,11cyclictest16081-21tail18:05:190
25833998837,11cyclictest16081-21tail18:05:190
2583399876,24cyclictest32028-21unixbench-2d21:15:260
2583399864,28cyclictest0-21swapper/017:25:010
2583399864,28cyclictest0-21swapper/017:25:010
2583399864,13cyclictest0-21swapper/022:06:000
2583399855,15cyclictest0-21swapper/021:39:140
25833998520,12cyclictest0-21swapper/018:10:190
2583399844,27cyclictest0-21swapper/019:39:570
2583399834,37cyclictest0-21swapper/021:40:160
25833998321,13cyclictest0-21swapper/020:40:530
2583399824,27cyclictest0-21swapper/022:03:210
2583399824,26cyclictest0-21swapper/020:09:340
2583399824,26cyclictest0-21swapper/020:09:340
2583399823,34cyclictest0-21swapper/018:45:090
2583399823,34cyclictest0-21swapper/018:45:090
25833998219,13cyclictest0-21swapper/020:34:110
2583399803,29cyclictest0-21swapper/021:20:220
2583599795,50cyclictest30595-21hddtemp_smartct20:25:141
264282783,9sleep10-21swapper/121:08:471
2583699714,59cyclictest0-21swapper/221:55:092
25837996850,12cyclictest11443-21cut20:45:133
308012664,12sleep20-21swapper/218:35:252
2583699665,54cyclictest0-21swapper/219:22:412
2583599665,46cyclictest0-21swapper/119:50:551
25837996551,9cyclictest0-21swapper/321:55:253
2583699655,54cyclictest0-21swapper/221:15:062
2583699654,54cyclictest4276-21grep19:45:152
2583699654,52cyclictest0-21swapper/220:35:102
2583699644,54cyclictest0-21swapper/221:53:032
2583699644,53cyclictest11467-21hddtemp_smartct20:45:132
2583699644,53cyclictest0-21swapper/221:45:032
25835996418,24cyclictest0-21swapper/122:34:011
25837996347,9cyclictest24464-21fschecks_time21:05:133
25836996344,13cyclictest27308-21cpuspeed_turbos21:10:072
2583699634,53cyclictest0-21swapper/221:35:092
2583699634,52cyclictest0-21swapper/222:30:242
2583699634,52cyclictest0-21swapper/220:21:512
2583699634,51cyclictest2139-21grep21:20:172
25836996335,13cyclictest0-21swapper/222:20:242
25836996323,33cyclictest1553-21nscd17:30:012
2583699632,55cyclictest0-21swapper/222:10:202
2583699632,55cyclictest0-21swapper/222:10:202
2583599634,14cyclictest0-21swapper/122:35:361
219499630,5rtkit-daemon2193-21rtkit-daemon17:50:263
82542620,3sleep1201ktimersoftd/122:19:491
2583699624,52cyclictest0-21swapper/222:03:082
2583699624,52cyclictest0-21swapper/221:27:102
2583699624,51cyclictest0-21swapper/221:00:162
2583699624,51cyclictest0-21swapper/220:40:182
2583699624,51cyclictest0-21swapper/220:05:152
2583699624,51cyclictest0-21swapper/220:05:152
2583699624,51cyclictest0-21swapper/220:03:092
2583599624,37cyclictest0-21swapper/119:39:181
219499620,4rtkit-daemon2193-21rtkit-daemon21:01:413
25837996146,10cyclictest0-21swapper/319:37:253
2583699615,50cyclictest0-21swapper/219:40:362
2583699614,51cyclictest0-21swapper/219:50:182
2583699614,41cyclictest0-21swapper/220:32:382
2583699613,54cyclictest0-21swapper/219:34:002
2583699613,52cyclictest0-21swapper/220:50:052
2583599614,13cyclictest0-21swapper/121:10:261
25835996114,29cyclictest107550irq/46-eth022:20:251
161662613,50sleep30-21swapper/320:04:353
322862603,11sleep10-21swapper/121:15:561
2583699605,49cyclictest0-21swapper/221:42:462
2583699605,49cyclictest0-21swapper/219:55:272
2583699604,49cyclictest0-21swapper/220:25:142
2583599604,13cyclictest0-21swapper/120:50:051
219499600,4rtkit-daemon2193-21rtkit-daemon18:31:243
25837995945,7cyclictest0-21swapper/321:35:043
2583699594,49cyclictest0-21swapper/222:35:022
2583699594,49cyclictest0-21swapper/222:05:212
2583699594,49cyclictest0-21swapper/219:37:042
2583599594,40cyclictest0-21swapper/118:10:251
2583599594,36cyclictest0-21swapper/121:39:491
25835995929,10cyclictest1124-21snmpd20:57:571
25835995925,18cyclictest25357-21cstates22:45:041
25835995919,26cyclictest0-21swapper/121:24:371
219499590,4rtkit-daemon2193-21rtkit-daemon21:30:403
219499590,4rtkit-daemon2193-21rtkit-daemon21:30:403
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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