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2026-09-02 - 06:44

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #5, slot #3

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 rack5slot3s.osadl.org (updated Wed Sep 02, 2026 00:44:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
149462252193,20sleep20-21swapper/219:06:222
150752232162,23sleep10-21swapper/119:08:021
149762205176,20sleep00-21swapper/019:06:440
151922202165,24sleep30-21swapper/319:09:333
323482950,1sleep00-21swapper/023:25:210
15320996057,2cyclictest0-21swapper/222:33:192
213902500,2sleep10-21swapper/119:20:181
15320994945,3cyclictest0-21swapper/221:56:532
142212440,1sleep10-21swapper/100:00:011
226592430,2sleep20-21swapper/223:05:122
1532599410,30cyclictest0-21swapper/323:07:013
1531399411,36cyclictest4867-21/usr/sbin/munin22:25:191
1532599391,28cyclictest0-21swapper/321:59:013
1531399380,32cyclictest0-21swapper/121:20:191
1532599371,27cyclictest0-21swapper/321:39:533
1532599370,30cyclictest0-21swapper/323:41:453
1532099370,23cyclictest0-21swapper/200:38:092
1531399377,14cyclictest19593-21sort00:10:191
1531399371,32cyclictest28920-21fschecks_time22:05:151
1531399371,23cyclictest21509-21grep00:15:171
1531399371,23cyclictest15859-21/usr/sbin/munin22:50:191
1531399371,21cyclictest26857-21/usr/sbin/munin23:15:191
15320993633,2cyclictest0-21swapper/221:04:392
1531399361,26cyclictest8027-21/usr/sbin/munin20:05:161
1532599351,27cyclictest0-21swapper/321:22:453
1532099351,25cyclictest0-21swapper/220:57:192
1531399352,29cyclictest30349-21grep00:35:161
1531399352,23cyclictest12050irq/123-ahci[0019:35:021
1531399351,31cyclictest6168-21/usr/sbin/munin20:00:141
1531399351,31cyclictest17498-21idleruntime-cro19:15:011
1531399351,31cyclictest13437-21awk22:45:011
1531399351,31cyclictest13437-21awk22:45:011
1531399351,30cyclictest16852-21/usr/sbin/munin00:05:151
1531399351,22cyclictest11869-21sleep23:55:011
1531399351,22cyclictest11869-21sleep23:55:011
1531399351,20cyclictest31431-21cstates23:25:121
1530499358,12cyclictest24450-21perf23:10:010
1532599341,21cyclictest0-21swapper/322:02:053
1532599341,20cyclictest0-21swapper/323:13:413
1532599341,20cyclictest0-21swapper/321:40:133
1532599341,19cyclictest0-21swapper/320:15:213
1532099341,25cyclictest0-21swapper/219:44:512
1531399341,31cyclictest19423-21awk21:45:011
1531399341,30cyclictest0-21swapper/122:01:011
1531399341,29cyclictest4015-21latency_hist21:10:011
1531399341,29cyclictest25909-21mailstats23:10:241
1531399341,23cyclictest29318-21chrt00:33:161
1531399341,23cyclictest1070-21/usr/sbin/munin23:30:121
1531399341,20cyclictest14659-21/usr/sbin/munin22:45:221
1531399341,19cyclictest29052-21/usr/sbin/munin23:20:241
1531399341,17cyclictest25068-21ntpq21:55:221
1531399340,24cyclictest0-21swapper/121:50:251
152782340,5sleep015282-21gltestperf20:20:160
81042330,4sleep01530499cyclictest21:16:110
1532599331,24cyclictest0-21swapper/300:21:473
1532599331,22cyclictest0-21swapper/323:25:013
1532599331,19cyclictest0-21swapper/322:28:253
1532099331,14cyclictest4018-21diskmemload21:50:152
1531399338,18cyclictest0-21swapper/120:25:141
1531399336,16cyclictest7621-21cat23:45:011
1531399332,27cyclictest23448-21diskstats00:20:141
1531399331,28cyclictest766-21ntpd19:46:151
1531399331,28cyclictest24436-21munin-run23:10:011
1531399331,21cyclictest361-21/usr/sbin/munin22:15:161
1531399331,20cyclictest30732-21expr22:10:131
1531399331,20cyclictest15975-21awk21:35:161
1531399331,16cyclictest15171-21latency_hist21:35:011
1531399331,16cyclictest15171-21latency_hist21:35:011
1531399330,21cyclictest0-21swapper/119:55:161
1531399330,19cyclictest0-21swapper/120:40:201
1530499334,14cyclictest22242-21munin-run23:05:010
1532599321,25cyclictest0-21swapper/321:00:053
1532599321,21cyclictest0-21swapper/300:32:513
1532599321,13cyclictest0-21swapper/320:40:453
1532599320,20cyclictest0-21swapper/323:50:293
1532599320,20cyclictest0-21swapper/323:50:293
1531399328,11cyclictest0-21swapper/123:45:131
1531399326,17cyclictest0-21swapper/123:40:011
1531399323,24cyclictest27810-21/usr/sbin/munin20:50:271
1531399321,28cyclictest7128-21cpuspeed_turbos22:30:131
1531399321,28cyclictest27263-21latency_hist00:30:021
1531399321,27cyclictest4665-21sort22:25:011
1531399321,27cyclictest19830-21interrupts20:30:191
1531399321,27cyclictest19567-21unixbench_multi22:55:251
1531399321,21cyclictest6707-21cstates21:15:161
1531399321,19cyclictest12409-21unixbench_singl21:25:251
15325993118,3cyclictest0-21swapper/320:50:293
1532599311,24cyclictest0-21swapper/300:15:513
1532599311,22cyclictest0-21swapper/322:06:373
1532599311,20cyclictest0-21swapper/319:53:333
1532599311,18cyclictest0-21swapper/322:37:333
1532599311,18cyclictest0-21swapper/321:51:213
1532599311,14cyclictest0-21swapper/321:49:173
1532599310,18cyclictest0-21swapper/300:29:193
1532099311,12cyclictest0-21swapper/220:45:152
1532099310,25cyclictest0-21swapper/222:27:352
1531399317,9cyclictest0-21swapper/119:20:011
1531399311,27cyclictest3394-21latency_hist19:55:011
1531399311,27cyclictest21623-21timerandwakeup23:00:231
1531399311,27cyclictest1414-21chrt21:00:261
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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