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2026-09-21 - 03:31

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #b, slot #2

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.
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, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 50 highest latencies:
System rackbslot2s.osadl.org (updated Mon Sep 21, 2026 00:48:38)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
22071909912404,1234cyclictest860048-21kworker/14:2+events19:39:546
22071759912325,1225cyclictest860048-21kworker/14:2+events22:01:296
22071969912194,1214cyclictest2457138-21kworker/16:0+events23:15:228
22072119912165,1209cyclictest2772038-21kworker/13:2+events23:45:215
22071909912164,1210cyclictest2680688-21kworker/14:0+events22:43:026
22071759912064,1199cyclictest2218111-21kworker/16:1+events19:22:138
22071759912034,1196cyclictest2097647-21kworker/14:1+events21:07:166
22071759912034,1196cyclictest2097647-21kworker/14:1+events21:07:156
22071829911975,1191cyclictest4009213-21kworker/17:1+events22:02:399
22071829911904,1185cyclictest2455589-21turbostat21:04:5511
22071829911904,1185cyclictest2455589-21turbostat21:04:5511
22071689911904,1184cyclictest2523120-21kworker/15:0+events23:47:377
22071759911890,1187cyclictest0-21swapper/1523:41:277
22071689911855,1178cyclictest3783980-21kworker/15:1+events20:28:417
220719499118310,1172cyclictest23421-21kworker/8:2+events19:45:4418
22072119911764,1170cyclictest2421863-21kworker/13:1+events21:40:445
22071759911764,1171cyclictest0-21swapper/1422:28:446
22071689911764,1170cyclictest0-21swapper/1319:19:305
22071689911724,1167cyclictest0-21swapper/1320:01:265
22071659911708,1161cyclictest2522988-21kworker/0:1+events21:37:370
22072119911675,1160cyclictest2421863-21kworker/13:1+events22:17:115
220719499116210,1152cyclictest1295333-21kworker/8:1+events19:52:1718
22072069911614,1155cyclictest1855192-21kworker/12:1+events19:54:534
22071689911611,1157cyclictest0-21swapper/1500:04:327
22071759911604,1155cyclictest0-21swapper/1300:32:595
22071689911604,1155cyclictest3783980-21kworker/15:1+events21:29:517
22072069911594,1153cyclictest1855192-21kworker/12:1+events00:25:464
22071759911584,1152cyclictest4124330-21kworker/15:2+events20:37:397
22072069911575,1150cyclictest1855192-21kworker/12:1+events20:34:514
22072069911565,1149cyclictest2455500-21kworker/12:0+events21:03:034
22072069911565,1149cyclictest2455500-21kworker/12:0+events21:03:034
22072069911564,1150cyclictest1855192-21kworker/12:1+events20:59:274
22071689911554,1150cyclictest2240922-21turbostat19:29:5511
22071759911544,1147cyclictest2097647-21kworker/14:1+events00:31:306
22072119911525,1145cyclictest2240669-21kworker/13:0+events21:08:465
22072119911525,1145cyclictest2240669-21kworker/13:0+events21:08:465
22071759911524,1145cyclictest860048-21kworker/14:2+events20:09:556
22072119911514,1145cyclictest2646879-21kworker/13:2+events22:50:455
22072069911464,1140cyclictest2455500-21kworker/12:0+events21:39:514
22071689911454,1139cyclictest2218111-21kworker/16:1+events19:27:418
22072119911444,1138cyclictest2240669-21kworker/13:0+events20:44:505
22072069911434,1137cyclictest1855192-21kworker/12:1+events23:24:044
220717299114012,1126cyclictest2376322-21kworker/2:0+events20:40:2012
22071969911384,1132cyclictest0-21swapper/1722:24:489
22072119911374,1131cyclictest2421863-21kworker/13:1+events21:17:145
22072119911345,1127cyclictest2240669-21kworker/13:0+events23:04:285
22072119911344,1128cyclictest2263117-21kworker/13:2+events19:43:195
22072119911324,1126cyclictest2240669-21kworker/13:0+events00:03:465
220717299113011,1118cyclictest2613333-21kworker/2:1+events22:25:2112
22072069911294,1123cyclictest2782728-21kworker/12:0+events00:19:294
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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