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2026-08-14 - 19:06

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #c, slot #7

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 or here to proceed to next system.
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 100 highest latencies:
System rackcslot7s.osadl.org (updated Fri Aug 14, 2026 12:44:47)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
31585924020,9sleep23056-21PK-Backend07:10:012
31503522460,15sleep30-21swapper/307:05:243
40389621100,3sleep20-21swapper/211:15:152
40389621100,3sleep20-21swapper/211:15:152
32794921020,4sleep13056-21PK-Backend07:40:201
3147192970,21sleep013-21ksoftirqd/007:05:170
3148492840,17sleep10-21swapper/107:05:221
3682662500,2sleep20-21swapper/209:35:142
3775762410,3sleep20-21swapper/210:00:202
3857882320,5sleep0385794-21cpuspeed_turbos10:25:110
31592499319,12cyclictest82332-21update-manager08:15:351
3334112300,4sleep33056-21PK-Backend07:55:213
3464662290,7sleep0131ksoftirqd/008:35:010
315924992810,7cyclictest324638-21users07:30:261
31592499270,19cyclictest0-21swapper/111:17:511
31592499270,19cyclictest0-21swapper/111:17:501
315924992619,6cyclictest3056-21PK-Backend09:16:451
139099260,4rtkit-daemon1389-21rtkit-daemon12:24:450
3429662250,3chrt342970-21munin-plugin-st08:25:002
139099250,3rtkit-daemon1389-21rtkit-daemon11:24:300
3637042240,8sleep126-21ksoftirqd/109:20:211
31592499240,18cyclictest3056-21PK-Backend12:18:481
4322132230,4chrt0-21swapper/212:35:172
315932992321,1cyclictest0-21swapper/309:37:433
315924992321,1cyclictest3056-21PK-Backend11:00:201
315924992316,1cyclictest0-21swapper/107:20:451
4171712220,4sleep30-21swapper/311:55:003
315932992220,1cyclictest0-21swapper/309:54:123
315932992219,2cyclictest3056-21PK-Backend12:30:263
315932992219,2cyclictest3056-21PK-Backend11:13:083
315932992219,2cyclictest3056-21PK-Backend10:39:343
315932992214,6cyclictest332006-21cron07:55:013
31593299220,20cyclictest3056-21PK-Backend12:00:333
31593299220,19cyclictest343232-21apt08:25:103
315927992219,2cyclictest339495-21apt08:15:132
315927992214,6cyclictest388845-21cron10:35:002
315924992220,1cyclictest3056-21PK-Backend08:33:321
315924992219,2cyclictest3056-21PK-Backend10:34:251
315924992215,5cyclictest334399-21grep08:00:131
31592499220,21cyclictest3056-21PK-Backend10:20:521
315922992220,1cyclictest0-21swapper/012:01:110
315922992220,1cyclictest0-21swapper/010:03:220
315922992212,7cyclictest385120-21apt-get10:25:000
31592299220,21cyclictest0-21swapper/011:45:020
139099220,3rtkit-daemon1389-21rtkit-daemon12:29:291
139099220,19rtkit-daemon410442-21apt11:35:101
139099220,18rtkit-daemon315915-21cyclictest08:53:390
4076902210,4sleep33056-21PK-Backend11:25:183
31593299215,14cyclictest383402-21basename10:20:003
315932992119,1cyclictest3056-21PK-Backend10:44:213
315932992119,1cyclictest3056-21PK-Backend08:42:343
315932992119,1cyclictest0-21swapper/310:34:473
315932992119,1cyclictest0-21swapper/309:24:313
315932992119,1cyclictest0-21swapper/309:13:233
315932992119,1cyclictest0-21swapper/308:35:113
315932992119,1cyclictest0-21swapper/308:07:123
315932992119,1cyclictest0-21swapper/307:45:223
315932992118,2cyclictest3056-21PK-Backend09:29:183
31593299210,20cyclictest0-21swapper/307:42:383
31593299210,19cyclictest3056-21PK-Backend11:34:513
31593299210,19cyclictest3056-21PK-Backend08:03:193
31593299210,19cyclictest0-21swapper/307:15:143
315927992119,1cyclictest0-21swapper/209:19:422
315927992114,5cyclictest436-20systemd-journal09:15:002
315927992113,6cyclictest319297-21threads07:15:222
31592799211,19cyclictest0-21swapper/208:34:392
31592799210,19cyclictest0-21swapper/211:43:122
315924992119,1cyclictest3056-21PK-Backend12:08:541
315924992119,1cyclictest3056-21PK-Backend10:27:551
315924992119,1cyclictest3056-21PK-Backend09:12:171
315924992119,1cyclictest3056-21PK-Backend08:11:011
315924992119,1cyclictest0-21swapper/112:00:081
315924992119,1cyclictest0-21swapper/111:52:321
315924992119,1cyclictest0-21swapper/110:39:451
315924992119,1cyclictest0-21swapper/110:06:131
315924992119,1cyclictest0-21swapper/109:46:461
315924992119,1cyclictest0-21swapper/109:25:091
315924992119,1cyclictest0-21swapper/108:39:331
315924992119,1cyclictest0-21swapper/107:27:411
315924992119,1cyclictest0-21swapper/107:11:041
315924992118,2cyclictest3056-21PK-Backend08:43:381
315924992113,6cyclictest319830-21grep07:19:591
31592499210,20cyclictest0-21swapper/108:57:181
31592499210,20cyclictest0-21swapper/107:55:471
31592499210,19cyclictest3056-21PK-Backend08:20:531
315922992119,1cyclictest0-21swapper/012:30:240
315922992119,1cyclictest0-21swapper/011:09:410
315922992119,1cyclictest0-21swapper/009:28:490
315922992119,1cyclictest0-21swapper/009:17:120
315922992119,1cyclictest0-21swapper/008:42:320
315922992119,1cyclictest0-21swapper/008:39:480
315922992119,1cyclictest0-21swapper/007:36:140
315922992119,1cyclictest0-21swapper/007:30:260
315922992119,1cyclictest0-21swapper/007:21:330
315922992118,2cyclictest3056-21PK-Backend10:45:410
315922992114,5cyclictest883-21dbus-daemon08:45:350
3774762200,4chrt0-21swapper/110:00:181
315932992018,1cyclictest3056-21PK-Backend12:21:083
315932992018,1cyclictest3056-21PK-Backend07:32:443
315932992018,1cyclictest0-21swapper/312:09:173
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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