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2025-09-18 - 07:19

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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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 Thu Sep 18, 2025 00:43:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
211482623,51sleep00-21swapper/019:58:260
1234899622,53cyclictest0-21swapper/217:53:432
1234799625,48cyclictest0-21swapper/121:20:421
1235099614,48cyclictest3476-21latency_hist19:23:093
1235099614,48cyclictest3476-21latency_hist19:23:093
1234899612,53cyclictest0-21swapper/220:18:402
1234799613,17cyclictest0-21swapper/120:58:291
7632603,9sleep1912-21df_abs19:13:241
158582603,12sleep20-21swapper/218:38:102
1234899602,7cyclictest14824-21grep22:03:272
207382593,12sleep20-21swapper/217:38:322
1235099593,47cyclictest7860-21munin-node21:48:333
1234799599,30cyclictest0-21swapper/122:33:131
1234799595,30cyclictest0-21swapper/117:28:361
1234799594,14cyclictest0-21swapper/118:38:381
1234799594,14cyclictest0-21swapper/118:38:381
36702583,11sleep00-21swapper/019:23:190
36702583,11sleep00-21swapper/019:23:190
275572584,48sleep10-21swapper/119:00:141
195062583,47sleep00-21swapper/018:43:320
195062583,47sleep00-21swapper/018:43:320
1235099584,47cyclictest0-21swapper/319:28:223
1235099575,44cyclictest19629-21munin-node21:08:373
1235099574,46cyclictest0-21swapper/319:38:273
1234799575,31cyclictest0-21swapper/118:28:341
12347995721,15cyclictest0-21swapper/120:08:231
1235099564,45cyclictest0-21swapper/319:08:213
1235099564,44cyclictest0-21swapper/318:58:203
1235099563,46cyclictest31688-21cut21:33:163
1235099563,46cyclictest31688-21cut21:33:163
1235099563,46cyclictest25583-21munin-node22:28:243
1235099563,46cyclictest0-21swapper/322:13:103
1235099563,46cyclictest0-21swapper/322:13:103
1235099563,45cyclictest4132-21munin-node18:13:303
1234799566,30cyclictest0-21swapper/119:03:421
1234799565,36cyclictest0-21swapper/120:13:221
1234799563,46cyclictest0-21swapper/118:08:211
12347995621,16cyclictest0-21swapper/119:33:391
12345995629,21cyclictest0-21swapper/017:58:370
12345995629,21cyclictest0-21swapper/017:58:370
1234799556,29cyclictest0-21swapper/120:03:071
1234799555,31cyclictest0-21swapper/118:53:341
1234799555,30cyclictest0-21swapper/118:33:391
1234799555,29cyclictest0-21swapper/117:48:381
1234799554,31cyclictest0-21swapper/122:18:251
1234799553,47cyclictest0-21swapper/122:48:301
12347995522,13cyclictest0-21swapper/117:43:331
12347995521,14cyclictest0-21swapper/119:48:201
12347995521,12cyclictest0-21swapper/122:15:001
12347995521,12cyclictest0-21swapper/122:15:001
12347995520,15cyclictest0-21swapper/122:08:201
12347995517,10cyclictest0-21swapper/117:33:271
12347995512,9cyclictest201ktimersoftd/121:28:381
12347995512,9cyclictest201ktimersoftd/121:28:381
299692542,10sleep00-21swapper/020:20:220
223099540,5rtkit-daemon2229-21rtkit-daemon17:20:463
223099540,5rtkit-daemon2229-21rtkit-daemon17:20:463
149532542,45sleep00-21swapper/019:44:230
1235099544,44cyclictest0-21swapper/322:48:113
1235099544,43cyclictest0-21swapper/322:23:153
12350995439,9cyclictest28790-21cut20:18:263
1235099543,44cyclictest8936-21munin-node18:23:383
1235099543,44cyclictest3274-21timerwakeupswit21:38:363
1235099543,43cyclictest1403-21iostat_ios19:13:313
1235099543,42cyclictest22109-21munin-node17:43:243
1234899543,45cyclictest0-21swapper/219:48:212
1234799547,29cyclictest0-21swapper/122:04:171
1234799545,30cyclictest0-21swapper/121:58:351
1234799545,30cyclictest0-21swapper/121:38:241
1234799545,30cyclictest0-21swapper/119:38:251
1234799545,29cyclictest0-21swapper/121:23:191
1234799545,27cyclictest0-21swapper/122:28:161
1234799544,34cyclictest0-21swapper/118:48:221
1234799544,30cyclictest0-21swapper/119:33:081
1234799544,30cyclictest0-21swapper/118:18:241
1234799544,29cyclictest0-21swapper/120:18:251
1234799543,46cyclictest0-21swapper/119:23:081
1234799543,46cyclictest0-21swapper/119:23:081
1234799543,45cyclictest0-21swapper/121:08:271
1234799543,45cyclictest0-21swapper/120:38:351
1234799543,45cyclictest0-21swapper/118:08:111
1234799543,14cyclictest0-21swapper/122:43:321
12347995420,16cyclictest0-21swapper/121:47:361
218522532,9sleep00-21swapper/017:43:020
1235099533,43cyclictest1160-21snmpd22:34:223
1235099532,45cyclictest0-21swapper/322:38:243
1235099532,45cyclictest0-21swapper/321:23:193
1235099532,45cyclictest0-21swapper/320:58:323
1235099532,45cyclictest0-21swapper/320:33:343
1235099532,45cyclictest0-21swapper/317:38:253
1234899533,43cyclictest1160-21snmpd21:20:412
1234899532,45cyclictest0-21swapper/221:58:312
1234899532,43cyclictest10075-21munin-node20:48:402
1234899532,43cyclictest0-21swapper/219:23:092
1234899532,43cyclictest0-21swapper/219:23:092
12348995312,34cyclictest0-21swapper/218:48:102
12348995312,34cyclictest0-21swapper/218:48:102
1234799536,29cyclictest0-21swapper/121:03:321
1234799536,29cyclictest0-21swapper/118:23:381
1234799535,29cyclictest0-21swapper/119:53:271
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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