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2026-04-20 - 12:05

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 Mon Apr 20, 2026 00:44:45)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
163729521060,4sleep20-21swapper/223:35:192
154259527940,13sleep30-21swapper/319:08:033
154128327946,23sleep10-21swapper/119:05:111
154210027646,21sleep20-21swapper/219:05:252
154126727243,20sleep00-21swapper/019:05:060
16472492510,4sleep03056-21PK-Backend00:05:130
15859892490,3sleep00-21swapper/021:10:170
16463262470,2sleep20-21swapper/200:00:222
15884082440,2sleep10-21swapper/121:16:361
1542906992916,3cyclictest26-21ksoftirqd/123:18:331
1542906992815,3cyclictest26-21ksoftirqd/120:47:041
1542906992611,4cyclictest26-21ksoftirqd/122:32:261
154290699260,6cyclictest26-21ksoftirqd/123:50:001
16472222250,11sleep342-21ksoftirqd/300:05:123
1542914992516,3cyclictest42-21ksoftirqd/323:30:013
154290699251,9cyclictest26-21ksoftirqd/122:50:001
1542906992510,4cyclictest26-21ksoftirqd/119:59:041
1542914992419,4cyclictest42-21ksoftirqd/321:20:003
1542906992411,3cyclictest26-21ksoftirqd/121:11:461
1542906992410,4cyclictest26-21ksoftirqd/121:26:221
139099240,16rtkit-daemon3056-21PK-Backend00:36:123
139099240,15rtkit-daemon0-21swapper/220:22:492
154291499230,21cyclictest1641301-21runrttasks23:47:443
154291099230,21cyclictest0-21swapper/223:50:112
154290699233,8cyclictest26-21ksoftirqd/121:40:121
1542906992320,2cyclictest0-21swapper/123:39:551
154290699230,6cyclictest3056-21PK-Backend23:05:201
154290699230,21cyclictest1545362-21cpuspeed19:15:111
1542904992315,6cyclictest883-21dbus-daemon20:40:010
16564072220,11sleep126-21ksoftirqd/100:30:121
16445292220,4sleep13056-21PK-Backend23:55:191
15792602220,4sleep30-21swapper/320:50:203
154291499222,15cyclictest1588973-21runrttasks21:20:133
1542914992215,5cyclictest1608662-21diskstats22:15:143
1542914992213,7cyclictest436-20systemd-journal21:30:003
1542910992220,1cyclictest0-21swapper/220:01:312
1542910992211,9cyclictest1590461-21unin-run21:25:002
154291099220,20cyclictest0-21swapper/200:30:272
1542906992220,1cyclictest0-21swapper/122:00:251
1542906992220,1cyclictest0-21swapper/100:20:451
1542906992219,2cyclictest3056-21PK-Backend23:30:291
1542906992218,3cyclictest251rcuc/120:30:001
1542906992211,2cyclictest141rcu_preempt00:02:131
154290699220,21cyclictest3056-21PK-Backend19:49:191
154290699220,20cyclictest3056-21PK-Backend19:31:411
154290699220,20cyclictest16061682sleep122:08:411
154290699220,20cyclictest16061682sleep122:08:411
154290699220,20cyclictest0-21swapper/120:14:331
154291499219,4cyclictest42-21ksoftirqd/323:05:003
154291499219,4cyclictest42-21ksoftirqd/319:50:003
154291499217,2cyclictest141rcu_preempt00:30:163
1542914992119,1cyclictest3056-21PK-Backend21:40:033
154291499211,8cyclictest1550888-21df19:30:133
1542914992118,2cyclictest3056-21PK-Backend21:07:253
1542914992112,3cyclictest42-21ksoftirqd/323:35:223
154291499210,19cyclictest3056-21PK-Backend21:01:093
1542910992119,1cyclictest0-21swapper/221:36:482
1542910992119,1cyclictest0-21swapper/221:04:572
1542910992119,1cyclictest0-21swapper/220:55:042
1542910992119,1cyclictest0-21swapper/220:49:362
1542910992119,1cyclictest0-21swapper/219:55:352
1542910992112,7cyclictest1653071-21df_inode00:20:142
154291099210,20cyclictest0-21swapper/223:24:162
154291099210,20cyclictest0-21swapper/222:52:462
154291099210,20cyclictest0-21swapper/221:31:072
154291099210,20cyclictest0-21swapper/220:39:152
154291099210,20cyclictest0-21swapper/219:53:332
154291099210,20cyclictest0-21swapper/219:41:572
154291099210,20cyclictest0-21swapper/200:16:412
154290699212,7cyclictest26-21ksoftirqd/121:50:151
1542906992119,1cyclictest3056-21PK-Backend23:13:261
1542906992119,1cyclictest3056-21PK-Backend19:25:251
1542906992119,1cyclictest0-21swapper/121:45:111
1542906992119,1cyclictest0-21swapper/121:04:281
1542906992119,1cyclictest0-21swapper/120:58:131
1542906992119,1cyclictest0-21swapper/120:32:461
1542906992119,1cyclictest0-21swapper/120:15:341
1542906992119,1cyclictest0-21swapper/119:12:491
1542906992119,1cyclictest0-21swapper/100:36:191
1542906992118,2cyclictest3056-21PK-Backend22:13:161
1542906992117,3cyclictest251rcuc/120:22:411
1542906992111,2cyclictest141rcu_preempt21:36:331
154290699210,20cyclictest0-21swapper/119:37:081
154290699210,19cyclictest3056-21PK-Backend23:00:411
154290699210,19cyclictest3056-21PK-Backend22:38:101
154290499210,20cyclictest0-21swapper/022:34:200
139099210,13rtkit-daemon3056-21PK-Backend21:47:472
139099210,13rtkit-daemon3056-21PK-Backend21:47:253
16338752200,4sleep13056-21PK-Backend23:25:201
16155722200,3sleep20-21swapper/222:35:132
16057862200,3sleep20-21swapper/222:05:212
16057862200,3sleep20-21swapper/222:05:212
15561282200,3sleep20-21swapper/219:45:142
154291499207,3cyclictest141rcu_preempt00:10:403
154291499206,3cyclictest141rcu_preempt22:20:213
1542914992018,1cyclictest3056-21PK-Backend22:51:133
1542914992018,1cyclictest0-21swapper/322:48:093
154291499201,7cyclictest1642125-21df23:50:133
154291499201,7cyclictest1616804-21cat22:40:023
1542914992017,2cyclictest3056-21PK-Backend20:03:303
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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