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2026-07-19 - 02:40

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 Sun Jul 19, 2026 00:43:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2194991100,5rtkit-daemon2193-21rtkit-daemon23:26:410
7398991006,46cyclictest0-21swapper/222:22:152
739599974,12cyclictest0-21swapper/021:42:070
739899964,50cyclictest0-21swapper/220:37:112
739599954,80cyclictest0-21swapper/023:40:240
7395999512,68cyclictest0-21swapper/021:27:530
7399999432,11cyclictest9077-21tr19:32:153
739999934,42cyclictest0-21swapper/322:48:163
7399999327,13cyclictest0-21swapper/320:49:393
739599935,80cyclictest0-21swapper/022:32:130
739599935,80cyclictest0-21swapper/022:32:130
739599934,67cyclictest0-21swapper/021:37:230
739599925,73cyclictest0-21swapper/021:22:200
739599923,70cyclictest27090-21runrttasks20:57:290
739599923,11cyclictest0-21swapper/023:06:520
739599923,10cyclictest0-21swapper/022:43:000
739599915,78cyclictest0-21swapper/020:52:410
739599914,64cyclictest0-21swapper/022:02:220
739599913,11cyclictest5106-21needreboot20:27:270
7395999116,52cyclictest1547-21nscd20:47:100
739599909,55cyclictest0-21swapper/020:42:290
739599904,70cyclictest0-21swapper/022:12:200
739599904,14cyclictest0-21swapper/021:33:270
739599904,12cyclictest0-21swapper/023:17:030
81412890,6sleep38143-21unixbench_singl19:27:333
739599896,11cyclictest29922-21yum-updatesd-he21:02:150
739599895,14cyclictest0-21swapper/021:15:390
739599894,77cyclictest0-21swapper/023:42:510
739599894,77cyclictest0-21swapper/022:47:070
739599894,77cyclictest0-21swapper/022:09:010
739599894,77cyclictest0-21swapper/019:42:160
739599894,77cyclictest0-21swapper/019:42:160
739599894,69cyclictest0-21swapper/018:42:220
739599894,14cyclictest0-21swapper/020:37:200
739599893,8cyclictest107550irq/46-eth022:28:250
739599893,64cyclictest0-21swapper/020:32:220
739599893,10cyclictest30173-21tr21:47:100
739599893,10cyclictest30173-21tr21:47:100
739999884,39cyclictest0-21swapper/322:42:353
739599885,72cyclictest0-21swapper/023:07:150
739599885,64cyclictest0-21swapper/019:47:170
739599884,65cyclictest0-21swapper/022:17:080
739599883,68cyclictest0-21swapper/019:02:290
739599882,9cyclictest0-21swapper/022:01:110
739599875,66cyclictest0-21swapper/023:15:080
739599875,66cyclictest0-21swapper/023:15:080
739599874,9cyclictest2319-21perl22:37:120
739599874,59cyclictest0-21swapper/023:32:040
739599874,11cyclictest0-21swapper/020:22:300
739599874,11cyclictest0-21swapper/020:22:300
739599873,76cyclictest0-21swapper/021:10:190
739599873,76cyclictest0-21swapper/021:10:190
7395998713,44cyclictest107550irq/46-eth022:22:220
739599865,59cyclictest0-21swapper/020:02:280
739599865,54cyclictest0-21swapper/022:58:030
739599864,14cyclictest0-21swapper/021:17:090
739599863,8cyclictest24385-21basename18:57:150
7399998529,12cyclictest0-21swapper/320:37:213
7399998528,12cyclictest0-21swapper/323:39:263
739599854,8cyclictest20368-21kworker/0:023:47:250
739599854,63cyclictest0-21swapper/022:52:080
739599854,13cyclictest0-21swapper/023:30:080
739599853,63cyclictest324141diskmemload21:52:010
739599853,63cyclictest324141diskmemload21:52:010
739999844,39cyclictest0-21swapper/320:52:183
739599845,72cyclictest0-21swapper/019:22:010
739599834,12cyclictest0-21swapper/019:58:120
739599834,12cyclictest0-21swapper/019:37:160
739599834,12cyclictest0-21swapper/019:37:160
7399998220,27cyclictest8279-21fschecks_time20:32:173
739599825,66cyclictest0-21swapper/018:22:190
739599824,52cyclictest0-21swapper/019:52:280
7395998217,46cyclictest19540-21munin-node18:47:310
739599814,12cyclictest0-21swapper/020:08:500
739599814,12cyclictest0-21swapper/019:27:150
739599805,68cyclictest0-21swapper/019:16:580
739599804,58cyclictest0-21swapper/019:32:130
739599803,57cyclictest0-21swapper/018:32:140
95942790,3sleep2281ktimersoftd/220:33:132
739599795,13cyclictest0-21swapper/018:37:270
739599794,12cyclictest0-21swapper/018:27:390
739599784,66cyclictest0-21swapper/019:11:150
739599774,66cyclictest0-21swapper/018:52:350
739599774,66cyclictest0-21swapper/018:52:350
739599774,59cyclictest0-21swapper/019:22:250
739599762,12cyclictest30263-21munin-node20:17:320
739599743,9cyclictest0-21swapper/020:16:580
323992740,4sleep3361ktimersoftd/323:17:253
60942708,15sleep20-21swapper/218:17:212
739599695,57cyclictest0-21swapper/018:22:040
117412663,11sleep20-21swapper/223:34:012
739699633,41cyclictest0-21swapper/122:52:251
88372623,51sleep30-21swapper/323:31:163
739999613,51cyclictest0-21swapper/322:12:203
7396996143,11cyclictest9329-21unixbench_multi18:22:361
131372616,47sleep20-21swapper/221:22:282
739899605,48cyclictest0-21swapper/221:57:252
739899604,48cyclictest0-21swapper/220:57:322
7396996042,11cyclictest1444-21gltestperf21:07:171
7396996042,11cyclictest1444-21gltestperf21:07:171
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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