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2026-03-19 - 17:35

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 Thu Mar 19, 2026 12:44:46)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
5331612980,3sleep03056-21PK-Backend09:20:120
139099820,71rtkit-daemon0-21swapper/007:08:040
48454527145,18sleep30-21swapper/307:05:113
48569226343,14sleep20-21swapper/207:05:462
48589826244,13sleep10-21swapper/107:08:261
5715742460,4sleep13056-21PK-Backend11:10:011
5715742460,4sleep13056-21PK-Backend11:10:011
5958002390,3sleep00-21swapper/012:20:010
5529922290,3sleep00-21swapper/010:15:180
5104432280,3sleep10-21swapper/108:15:171
48616799260,24cyclictest522203-21apt-config08:50:013
486167992511,12cyclictest515524-21df_inode08:30:133
486161992510,13cyclictest548707-21unin-run10:05:001
139099250,4rtkit-daemon1389-21rtkit-daemon09:10:310
139099250,4rtkit-daemon1389-21rtkit-daemon07:31:031
486157992416,6cyclictest552172-21unin-run10:14:590
486157992416,6cyclictest552172-21unin-run10:14:590
486161992321,1cyclictest0-21swapper/107:14:061
486161992317,4cyclictest525082-21grep08:55:191
486161992314,7cyclictest436-20systemd-journal09:05:001
139099230,3rtkit-daemon1389-21rtkit-daemon09:05:330
139099230,3rtkit-daemon1389-21rtkit-daemon07:55:210
139099230,14rtkit-daemon0-21swapper/011:15:220
48616799221,19cyclictest525274-21/usr/sbin/munin08:55:213
48616799220,20cyclictest3056-21PK-Backend11:02:503
48616799220,20cyclictest3056-21PK-Backend10:04:033
48616399220,3cyclictest547062-21grep09:59:592
486161992220,1cyclictest0-21swapper/110:49:301
486161992220,1cyclictest0-21swapper/109:29:471
48616199220,20cyclictest497032-21apt-get07:40:031
48615799222,6cyclictest495517-21apt07:35:110
486157992220,1cyclictest0-21swapper/012:34:440
486157992220,1cyclictest0-21swapper/011:30:210
486157992220,1cyclictest0-21swapper/011:29:200
486157992220,1cyclictest0-21swapper/010:50:340
486157992220,1cyclictest0-21swapper/007:11:130
48615799221,6cyclictest545473-21apt09:55:100
48615799221,6cyclictest490316-21apt07:20:100
486157992212,8cyclictest436-20systemd-journal10:33:350
486157992210,8cyclictest575213-21apt11:20:110
48615799220,21cyclictest0-21swapper/007:27:010
48615799220,20cyclictest536550-21apt09:30:100
139099220,14rtkit-daemon0-21swapper/112:00:211
5117982210,3sleep2331rcuc/208:20:122
48616799213,15cyclictest555613-21perf10:25:003
48616799210,2cyclictest42-21ksoftirqd/311:26:283
48616799210,19cyclictest3056-21PK-Backend12:24:223
48616799210,19cyclictest3056-21PK-Backend11:41:303
48616799210,19cyclictest3056-21PK-Backend11:22:513
48616799210,19cyclictest3056-21PK-Backend10:06:533
48616799210,19cyclictest3056-21PK-Backend09:13:273
48616799210,19cyclictest3056-21PK-Backend07:22:553
486163992119,1cyclictest0-21swapper/208:27:272
486163992112,7cyclictest596752-21ntp_states12:20:172
48616399210,20cyclictest0-21swapper/210:17:042
48616399210,20cyclictest0-21swapper/210:05:422
48616399210,20cyclictest0-21swapper/207:18:322
486161992119,1cyclictest3056-21PK-Backend08:42:141
486161992119,1cyclictest0-21swapper/111:23:361
486161992119,1cyclictest0-21swapper/110:12:531
486161992119,1cyclictest0-21swapper/110:12:531
486161992119,1cyclictest0-21swapper/109:55:151
486161992119,1cyclictest0-21swapper/109:52:251
486161992119,1cyclictest0-21swapper/109:10:531
486161992119,1cyclictest0-21swapper/109:08:171
486161992119,1cyclictest0-21swapper/108:13:211
486161992119,1cyclictest0-21swapper/108:04:571
486161992119,1cyclictest0-21swapper/107:29:011
486161992118,2cyclictest0-21swapper/108:45:321
486161992114,6cyclictest883-21dbus-daemon11:45:011
486161992113,6cyclictest497032-21apt-get07:40:001
48616199210,20cyclictest3056-21PK-Backend10:22:121
48616199210,20cyclictest3056-21PK-Backend08:52:081
48616199210,20cyclictest3056-21PK-Backend08:36:541
48616199210,20cyclictest0-21swapper/111:31:071
48616199210,20cyclictest0-21swapper/110:52:071
48616199210,20cyclictest0-21swapper/110:27:521
48615799212,7cyclictest504471-21/usr/sbin/munin08:00:150
486157992119,1cyclictest0-21swapper/012:01:180
486157992119,1cyclictest0-21swapper/011:55:020
486157992119,1cyclictest0-21swapper/010:28:440
486157992119,1cyclictest0-21swapper/009:27:330
486157992119,1cyclictest0-21swapper/008:09:050
486157992119,1cyclictest0-21swapper/008:09:050
486157992119,1cyclictest0-21swapper/007:44:180
486157992118,2cyclictest13-21ksoftirqd/008:16:220
486157992115,5cyclictest564537-21cron10:50:010
486157992113,6cyclictest548765-21cut10:05:000
486157992113,6cyclictest1-21systemd11:45:010
48615799210,7cyclictest5402312dpkg09:40:020
48615799210,20cyclictest13-21ksoftirqd/009:39:020
48615799210,20cyclictest0-21swapper/010:36:410
48615799210,20cyclictest0-21swapper/010:21:000
48615799210,20cyclictest0-21swapper/009:17:060
48615799210,19cyclictest3056-21PK-Backend08:44:140
48615799210,10cyclictest545144-21runrttasks09:54:240
139099210,13rtkit-daemon0-21swapper/011:51:160
486167992017,2cyclictest3056-21PK-Backend11:38:383
486167992017,2cyclictest3056-21PK-Backend10:42:143
486167992017,2cyclictest3056-21PK-Backend10:36:203
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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