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2026-09-20 - 14:42

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 Sun Sep 20, 2026 00:44:47)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1717421350,5sleep00-21swapper/022:00:190
4986821190,5sleep342-21ksoftirqd/323:32:333
416159921060,3sleep00-21swapper/019:40:160
139099890,53rtkit-daemon0-21swapper/319:06:303
414949928140,13sleep10-21swapper/119:07:131
414963926343,14sleep00-21swapper/019:09:020
414955226343,14sleep20-21swapper/219:07:552
350732590,2sleep30-21swapper/322:50:143
235972520,3sleep03056-21PK-Backend22:20:010
523862460,3sleep00-21swapper/023:40:120
41671252390,1chrt4166380-21/usr/sbin/munin19:55:200
372752390,4sleep03056-21PK-Backend22:55:220
41604042360,3sleep33056-21PK-Backend19:35:233
41743892340,2sleep33056-21PK-Backend20:15:213
139099310,4rtkit-daemon1788643-21eadedCompositor20:21:200
414986099268,3cyclictest141rcu_preempt21:50:203
414986099259,14cyclictest0-21swapper/323:05:223
414986099236,3cyclictest42-21ksoftirqd/323:35:333
414985899239,5cyclictest34-21ksoftirqd/220:58:092
4149858992316,5cyclictest4153746-21apt-get19:20:012
4149858992315,7cyclictest30363-21users22:35:232
4149858992315,6cyclictest4158602-21python319:30:212
4149858992314,7cyclictest61836-21users00:05:242
414985499234,16cyclictest4173322-21dump-pmu-power20:15:001
4149854992320,2cyclictest3056-21PK-Backend22:34:441
4149854992313,7cyclictest67017-21sed00:20:221
4149853992321,1cyclictest0-21swapper/022:53:360
4149853992320,2cyclictest0-21swapper/021:05:070
414986099222,18cyclictest0-21swapper/321:35:133
4149860992219,2cyclictest3056-21PK-Backend21:41:063
4149860992219,2cyclictest3056-21PK-Backend19:23:233
4149860992214,6cyclictest4179375-21memory20:30:183
4149860992210,4cyclictest42-21ksoftirqd/320:50:083
414986099220,21cyclictest0-21swapper/321:00:233
414986099220,10cyclictest240532cstates22:20:133
414985899229,4cyclictest34-21ksoftirqd/223:41:582
4149858992213,7cyclictest20749-21/usr/sbin/munin22:10:182
4149858992211,9cyclictest4162988-21cpu19:45:152
414985899220,1cyclictest4161877-21strings19:40:192
4149854992220,1cyclictest0-21swapper/123:46:571
4149854992220,1cyclictest0-21swapper/122:06:251
4149854992220,1cyclictest0-21swapper/121:15:011
4149854992219,2cyclictest3056-21PK-Backend00:02:331
4149854992211,8cyclictest436-20systemd-journal20:00:011
414985499220,20cyclictest3056-21PK-Backend20:43:241
414985499220,20cyclictest3056-21PK-Backend20:36:011
414985499220,20cyclictest3056-21PK-Backend00:16:311
414985499220,20cyclictest3056-21PK-Backend00:16:311
414985499220,20cyclictest0-21swapper/120:20:131
4149853992220,1cyclictest0-21swapper/023:06:330
4149853992220,1cyclictest0-21swapper/022:11:450
4149853992220,1cyclictest0-21swapper/021:13:460
4149853992220,1cyclictest0-21swapper/020:43:450
4149853992220,1cyclictest0-21swapper/020:35:200
4149853992220,1cyclictest0-21swapper/020:19:370
4149853992220,1cyclictest0-21swapper/000:36:310
4149853992220,1cyclictest0-21swapper/000:32:040
4149853992220,1cyclictest0-21swapper/000:25:010
414985399220,21cyclictest0-21swapper/022:23:490
67872210,5sleep30-21swapper/321:30:243
4149860992119,1cyclictest0-21swapper/323:29:553
4149860992119,1cyclictest0-21swapper/320:46:183
4149860992119,1cyclictest0-21swapper/319:12:573
4149860992119,1cyclictest0-21swapper/300:36:473
414986099211,7cyclictest5047-21python321:25:223
4149860992113,5cyclictest4163804-21python319:45:233
4149860992112,7cyclictest28769-21apt-get22:35:003
414986099210,20cyclictest0-21swapper/323:22:333
414986099210,20cyclictest0-21swapper/322:58:133
414986099210,20cyclictest0-21swapper/322:43:523
4149858992119,1cyclictest0-21swapper/221:15:242
4149858992114,5cyclictest17806-21http22:05:002
4149858992113,6cyclictest436-20systemd-journal00:40:002
4149858992113,6cyclictest4190685-21systemd-run21:05:002
4149858992113,6cyclictest4166380-21/usr/sbin/munin19:55:212
414985899210,20cyclictest0-21swapper/221:43:022
414985899210,20cyclictest0-21swapper/219:37:422
4149854992119,1cyclictest3056-21PK-Backend22:44:251
4149854992119,1cyclictest3056-21PK-Backend22:35:321
4149854992119,1cyclictest3056-21PK-Backend21:05:151
4149854992119,1cyclictest0-21swapper/122:01:181
4149854992119,1cyclictest0-21swapper/121:53:481
4149854992119,1cyclictest0-21swapper/121:12:181
4149854992119,1cyclictest0-21swapper/120:01:411
4149854992119,1cyclictest0-21swapper/119:24:231
4149854992119,1cyclictest0-21swapper/100:30:371
414985499210,20cyclictest3056-21PK-Backend20:56:161
414985499210,20cyclictest0-21swapper/120:15:401
414985499210,20cyclictest0-21swapper/119:39:101
414985499210,19cyclictest3056-21PK-Backend23:23:381
414985499210,19cyclictest3056-21PK-Backend23:12:441
414985499210,19cyclictest3056-21PK-Backend22:46:011
414985499210,19cyclictest3056-21PK-Backend22:15:521
414985499210,19cyclictest3056-21PK-Backend21:29:011
4149853992119,1cyclictest0-21swapper/023:35:060
4149853992119,1cyclictest0-21swapper/021:50:010
4149853992119,1cyclictest0-21swapper/020:49:590
4149853992119,1cyclictest0-21swapper/020:07:010
4149853992113,6cyclictest9102-21cron21:40:000
414985399210,2cyclictest0-21swapper/000:12:180
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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