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2026-09-08 - 04:42

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, slot #4

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 rack0slot4s.osadl.org (updated Tue Sep 08, 2026 00:46:21)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
37792132407387,13sleep120-21swapper/1219:08:004
37790862372351,13sleep70-21swapper/719:06:1813
37790362371350,14sleep20-21swapper/219:05:418
37791432364343,14sleep50-21swapper/519:07:0411
37790442359318,15sleep100-21swapper/1019:05:492
37790282359340,12sleep110-21swapper/1119:05:343
37791442350326,14sleep60-21swapper/619:07:0512
37793112349327,14sleep140-21swapper/1419:09:226
37791092349330,13sleep130-21swapper/1319:06:415
37790632348326,14sleep40-21swapper/419:06:0010
37790422347327,13sleep80-21swapper/819:05:4714
37792522346325,14sleep150-21swapper/1519:08:357
37792382345323,14sleep10-21swapper/119:08:211
37792402344323,14sleep30-21swapper/319:08:239
37792632343324,12sleep90-21swapper/919:08:4515
37790512342321,14sleep00-21swapper/019:05:550
3779800996058,2cyclictest4072765-21kworker/u32:3+flush-259:000:25:180
377984699500,25cyclictest0-21swapper/1423:50:356
3779846994946,3cyclictest3980521-21kworker/u32:5+flush-259:022:27:336
3779846994913,11cyclictest0-21swapper/1423:39:356
3779846994913,11cyclictest0-21swapper/1420:21:536
3779846994912,11cyclictest0-21swapper/1400:01:346
3779846994812,11cyclictest0-21swapper/1420:54:506
3779846994812,11cyclictest0-21swapper/1420:10:546
3779846994812,11cyclictest0-21swapper/1419:15:596
3779846994812,11cyclictest0-21swapper/1400:12:336
3779846994812,11cyclictest0-21swapper/1400:12:326
3779846994712,10cyclictest0-21swapper/1419:37:576
3779846994610,11cyclictest0-21swapper/1423:06:396
377984699459,11cyclictest0-21swapper/1421:49:466
377984699459,11cyclictest0-21swapper/1419:48:566
3779800994543,2cyclictest3936416-21kworker/u32:1+flush-259:021:51:430
3779838994443,1cyclictest4041234-21kworker/u32:0+events_unbound23:42:303
3779846994218,11cyclictest0-21swapper/1422:55:406
3779838994038,2cyclictest4072765-21kworker/u32:3+flush-259:000:17:393
3779838994038,2cyclictest4072765-21kworker/u32:3+flush-259:000:17:383
3779846993813,25cyclictest0-21swapper/1423:17:376
3779846993813,25cyclictest0-21swapper/1422:33:426
3779800993834,0cyclictest0-21swapper/021:15:040
3779800993834,0cyclictest0-21swapper/021:15:030
3779846993712,25cyclictest0-21swapper/1422:00:446
3779846993712,25cyclictest0-21swapper/1400:34:306
3779819993711,23cyclictest3318-21Xorg21:15:0412
3779819993711,23cyclictest3318-21Xorg21:15:0312
3779834993633,2cyclictest4025151-21kworker/u32:5+events_unbound23:06:402
3779846993510,25cyclictest0-21swapper/1419:26:586
377984699349,0cyclictest0-21swapper/1420:43:516
3779838993434,0cyclictest0-21swapper/1122:59:053
3779838993434,0cyclictest0-21swapper/1100:10:243
3779838993434,0cyclictest0-21swapper/1100:10:233
3779807993430,3cyclictest782-21systemd-journal23:12:398
3779803993432,1cyclictest3954381-21kworker/u32:4+flush-259:023:00:171
3779800993433,1cyclictest3814008-21kworker/u32:1+flush-259:020:00:220
3779849993332,1cyclictest3962132-21kworker/u32:3+flush-259:022:28:117
3779838993333,0cyclictest0-21swapper/1122:54:053
3779838993333,0cyclictest0-21swapper/1100:30:233
3779838993231,1cyclictest3814008-21kworker/u32:1+events_unbound20:20:163
3779834993231,1cyclictest4095905-21kworker/u32:1+flush-259:000:25:232
3779813993232,0cyclictest0-21swapper/421:45:1710
377981399320,29cyclictest0-21swapper/423:10:1810
377980799320,31cyclictest0-21swapper/223:18:358
377980799320,29cyclictest4109835-21ssh00:05:548
377980799320,29cyclictest0-21swapper/222:47:008
3779849993130,1cyclictest1774-21snmpd23:49:457
377984699310,30cyclictest0-21swapper/1423:25:366
377984499310,30cyclictest0-21swapper/1320:47:365
377984099310,30cyclictest0-21swapper/1200:17:414
377984099310,30cyclictest0-21swapper/1200:17:404
3779838993131,0cyclictest0-21swapper/1122:36:303
3779838993130,1cyclictest0-21swapper/1100:27:123
3779834993130,1cyclictest3954048-21mii-tool22:05:152
3779834993130,1cyclictest3812491-21kworker/10:2+events22:14:052
3779834993130,1cyclictest1774-21snmpd21:56:202
3779834993129,1cyclictest3812491-21kworker/10:2+events23:37:142
3779834993129,1cyclictest3812491-21kworker/10:2+events23:34:572
3779834993129,1cyclictest3812491-21kworker/10:2+events23:26:362
3779834993129,1cyclictest3812491-21kworker/10:2+events22:37:592
3779834993129,1cyclictest3812491-21kworker/10:2+events21:50:122
3779834993129,1cyclictest3812491-21kworker/10:2+events21:11:122
3779834993129,1cyclictest3812491-21kworker/10:2+events21:11:112
3779834993129,1cyclictest3812491-21kworker/10:2+events00:15:262
3779834993129,1cyclictest3812491-21kworker/10:2+events00:15:252
3779834993129,1cyclictest3812491-21kworker/10:2+events00:01:132
3779834993129,1cyclictest3735116-21kworker/10:1+events19:26:292
377983499310,30cyclictest0-21swapper/1020:41:402
377983499310,30cyclictest0-21swapper/1020:30:252
377983499310,30cyclictest0-21swapper/1020:16:172
377982899310,31cyclictest0-21swapper/923:52:0915
377982899310,28cyclictest0-21swapper/922:08:3115
3779819993130,1cyclictest1774-21snmpd21:33:3212
377981999310,28cyclictest0-21swapper/623:20:1412
3779813993131,0cyclictest0-21swapper/423:50:1710
3779813993131,0cyclictest0-21swapper/422:23:0310
3779813993131,0cyclictest0-21swapper/421:15:0310
3779813993131,0cyclictest0-21swapper/421:15:0310
377980999310,30cyclictest0-21swapper/322:44:419
377980999310,30cyclictest0-21swapper/319:41:259
3779807993130,1cyclictest0-21swapper/220:25:278
3779807993130,1cyclictest0-21swapper/200:37:518
3779807993128,1cyclictest4130548-21sh00:23:388
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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