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2026-06-03 - 05:12

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 Jun 03, 2026 00:43:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1908621370,4sleep219081-21cpuspeed_turbos22:55:232
20738998839,31cyclictest23764-21ssh21:25:523
20738998440,27cyclictest18969-21wc22:05:443
20738998437,29cyclictest27268-21ntp_states21:30:393
20738998437,29cyclictest161731ssh23:38:503
20738998332,31cyclictest0-21swapper/323:50:333
20738998332,31cyclictest0-21swapper/323:50:333
20738998330,30cyclictest0-21swapper/322:40:283
20738998237,38cyclictest16221-21ntp_states00:25:343
20738998138,35cyclictest3427-21runrttasks21:44:463
20738998136,37cyclictest27305-21tr23:55:213
20738998037,26cyclictest22682-21kworker/3:121:54:423
20738998035,28cyclictest15954-21rm21:15:293
20738998035,28cyclictest15954-21rm21:15:293
20738998033,28cyclictest1124-21snmpd22:38:373
20738997935,36cyclictest21988-21ntpq22:10:383
20738997932,40cyclictest0-21swapper/321:35:343
20738997930,42cyclictest0-21swapper/322:27:303
20738997930,41cyclictest4795-21sendmail_mailqu23:20:383
20738997928,43cyclictest0-21swapper/321:14:283
20738997928,43cyclictest0-21swapper/321:14:283
20738997927,44cyclictest0-21swapper/323:15:203
20738997926,44cyclictest0-21swapper/323:12:463
20738997926,44cyclictest0-21swapper/323:12:463
20738997836,35cyclictest23980-21unixbench_singl23:00:443
20738997831,39cyclictest0-21swapper/323:43:013
20738997831,29cyclictest3871-21ssh00:07:473
20738997831,26cyclictest0-21swapper/322:02:103
20738997828,42cyclictest0-21swapper/322:15:273
20738997827,44cyclictest0-21swapper/323:27:293
20738997824,45cyclictest0-21swapper/320:18:543
20738997823,47cyclictest12708-21ssh21:56:423
20738997823,47cyclictest12708-21ssh21:56:423
219499770,6rtkit-daemon9581-21memory21:05:393
219499770,29rtkit-daemon2193-21rtkit-daemon23:08:560
20738997735,34cyclictest14789-21cat00:25:063
20738997734,26cyclictest11529-21munin-node23:30:363
20738997730,27cyclictest32099-21munin-run19:40:163
20738997729,29cyclictest0-21swapper/300:02:303
20738997725,44cyclictest5756-21munin-run21:00:133
20738997723,37cyclictest0-21swapper/300:32:233
20738997723,37cyclictest0-21swapper/300:32:233
20738997635,25cyclictest1124-21snmpd19:46:463
20738997635,25cyclictest1124-21snmpd19:46:463
20738997633,26cyclictest28918-21grep22:20:413
20738997630,26cyclictest19780-21iostat_ios22:55:313
20738997629,40cyclictest13548-21switchtime22:45:423
20738997629,28cyclictest0-21swapper/321:45:383
20738997627,42cyclictest0-21swapper/322:53:253
20738997623,45cyclictest0-21swapper/321:21:273
20738997537,31cyclictest19888-21fschecks_time20:20:333
20738997531,30cyclictest0-21swapper/322:30:293
20738997531,30cyclictest0-21swapper/322:30:293
20738997531,29cyclictest0-21swapper/323:09:493
20738997530,11cyclictest107550irq/46-eth020:13:433
20738997527,40cyclictest0-21swapper/300:15:163
20738997526,30cyclictest0-21swapper/323:48:013
20738997428,39cyclictest0-21swapper/319:40:493
20738997326,40cyclictest0-21swapper/320:35:323
20738997233,32cyclictest1227-21runrttasks21:01:523
20738997227,29cyclictest0-21swapper/319:21:423
20738997226,39cyclictest0-21swapper/300:10:113
20738997123,41cyclictest0-21swapper/319:10:453
20738997039,24cyclictest27305-21cpuspeed_turbos19:25:273
20738997029,35cyclictest0-21swapper/320:45:153
20738997026,37cyclictest6074-21seq19:50:433
20738997022,40cyclictest0-21swapper/320:30:263
20738997022,40cyclictest0-21swapper/320:30:263
20738996922,39cyclictest0-21swapper/320:00:163
20738996838,14cyclictest31407-21cpuspeed_turbos20:45:283
20738996826,35cyclictest0-21swapper/320:04:193
20738996824,24cyclictest0-21swapper/320:05:283
20738996749,12cyclictest22349-21gltestperf20:25:353
20738996716,34cyclictest0-21swapper/319:05:293
20738996716,34cyclictest0-21swapper/319:05:293
20738996621,37cyclictest2425-21netstat20:50:383
20738996619,32cyclictest0-21swapper/319:31:433
219499650,6rtkit-daemon0-21swapper/020:57:312
20738996538,20cyclictest25146-21tail19:15:383
219499620,4rtkit-daemon2193-21rtkit-daemon00:11:240
2073699627,46cyclictest31790-21processes00:00:401
2073599623,51cyclictest0-21swapper/000:20:330
2073799614,39cyclictest0-21swapper/221:28:282
20736996121,33cyclictest23058-21df_abs21:25:421
2073599613,11cyclictest0-21swapper/023:26:210
153872613,51sleep00-21swapper/022:50:220
68092603,12sleep10-21swapper/121:00:341
52692603,48sleep10-21swapper/123:20:581
219499600,4rtkit-daemon2193-21rtkit-daemon21:39:300
219499600,22rtkit-daemon2193-21rtkit-daemon21:40:300
2073799603,38cyclictest0-21swapper/222:20:332
20736996012,41cyclictest8951-21df_abs21:05:301
20735996029,23cyclictest20343-21grep20:20:390
219499590,6rtkit-daemon2193-21rtkit-daemon23:40:320
2073799593,38cyclictest30554-21ssh00:00:242
20737995919,23cyclictest26-21rcuc/219:20:172
2073599594,47cyclictest0-21swapper/022:10:370
20735995920,29cyclictest0-21swapper/023:10:410
20735995920,29cyclictest0-21swapper/023:10:410
203732597,12sleep00-21swapper/022:10:110
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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