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2026-05-17 - 21:47

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 Sun May 17, 2026 00:46:16)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
26897842423403,13sleep90-21swapper/919:05:1015
26927992371350,18sleep110-21swapper/1119:05:283
26930442368326,34sleep70-21swapper/719:07:1713
26930292366358,5sleep150-21swapper/1519:07:097
26929552366328,13sleep20-21swapper/219:06:078
26930432364357,5sleep60-21swapper/619:07:1612
26930852359317,14sleep120-21swapper/1219:07:554
26929312353335,12sleep00-21swapper/019:05:490
26930872349328,14sleep140-21swapper/1419:07:566
26932012348328,13sleep80-21swapper/819:09:2614
26931332347327,13sleep10-21swapper/119:08:311
26929582347328,12sleep50-21swapper/519:06:1111
26897792347327,13sleep40-21swapper/419:05:0610
26930952346325,14sleep30-21swapper/319:08:019
26932062341321,13sleep130-21swapper/1319:09:315
26897852341321,13sleep100-21swapper/1019:05:112
269368999424,25cyclictest0-21swapper/1421:08:426
269368999415,11cyclictest0-21swapper/1421:41:396
2693689993838,0cyclictest0-21swapper/1400:31:546
2693689993636,0cyclictest0-21swapper/1423:32:246
269368999360,11cyclictest0-21swapper/1421:52:386
269368999360,11cyclictest0-21swapper/1421:30:406
269368999360,11cyclictest0-21swapper/1421:19:416
2693668993636,0cyclictest0-21swapper/722:30:2713
2693653993632,4cyclictest2842757-21kworker/u32:1+events_unbound22:33:218
2693689993534,1cyclictest2842757-21kworker/u32:1+flush-259:022:50:196
2693653993534,1cyclictest3017095-21ssh00:00:148
2693653993534,1cyclictest1769-21arpwatch23:21:368
2693653993534,1cyclictest1769-21arpwatch23:21:358
2693653993531,3cyclictest2979724-21kworker/u32:3+events_unbound23:50:108
2693668993433,1cyclictest2755851-21kworker/u32:3+flush-259:021:10:1813
2693653993433,1cyclictest2978914-21ntpq23:30:218
2693653993432,2cyclictest3030053-21kworker/u32:2+events_unbound00:30:008
269368999338,0cyclictest0-21swapper/1422:03:386
2693689993333,0cyclictest0-21swapper/1422:30:276
2693689993333,0cyclictest0-21swapper/1421:29:206
269368999330,8cyclictest0-21swapper/1419:18:526
269368999330,8cyclictest0-21swapper/1400:37:226
269368999330,33cyclictest0-21swapper/1419:29:516
2693658993330,3cyclictest1774-21snmpd21:13:1110
269365399334,29cyclictest0-21swapper/200:24:598
2693653993330,3cyclictest2979724-21kworker/u32:3+events_unbound23:48:458
2693653993329,1cyclictest0-21swapper/223:28:448
2693653993329,1cyclictest0-21swapper/223:28:438
2693653993324,2cyclictest0-21swapper/221:20:058
269368999328,11cyclictest0-21swapper/1423:42:296
2693689993232,0cyclictest0-21swapper/1422:43:276
2693689993232,0cyclictest0-21swapper/1400:17:266
2693689993232,0cyclictest0-21swapper/1400:01:316
269367199320,32cyclictest0-21swapper/820:30:1514
2693668993232,0cyclictest0-21swapper/700:17:2613
2693668993230,1cyclictest0-21swapper/721:40:0513
269366899322,30cyclictest0-21swapper/722:24:1213
2693658993228,4cyclictest1774-21snmpd23:14:5210
269365699320,29cyclictest0-21swapper/319:45:149
269365399323,29cyclictest0-21swapper/221:32:298
2693653993232,0cyclictest0-21swapper/223:44:038
2693653993232,0cyclictest0-21swapper/222:14:048
2693653993232,0cyclictest0-21swapper/221:40:458
2693653993232,0cyclictest0-21swapper/221:13:358
2693653993231,1cyclictest2923042-21ssh22:48:048
2693653993227,3cyclictest2805163-21kworker/u32:4+events_unbound21:26:328
269365399322,30cyclictest2923262-21kworker/2:0-events00:15:528
269365399321,30cyclictest2905441-21kworker/2:1-events22:39:288
269365399321,30cyclictest2811945-21kworker/2:2-mm_percpu_wq21:46:228
269365399320,0cyclictest0-21swapper/222:03:298
2693692993130,1cyclictest1774-21snmpd19:10:287
269368999317,11cyclictest0-21swapper/1420:35:466
269368999316,14cyclictest0-21swapper/1422:25:366
2693689993131,0cyclictest0-21swapper/1423:09:176
2693689993131,0cyclictest0-21swapper/1422:14:146
2693689993131,0cyclictest0-21swapper/1421:36:476
2693689993130,1cyclictest1774-21snmpd19:50:116
269368999312,28cyclictest151-21ksoftirqd/1423:20:296
269368999312,28cyclictest151-21ksoftirqd/1423:20:296
269368699310,30cyclictest0-21swapper/1321:20:155
269368499310,30cyclictest0-21swapper/1222:07:464
2693678993129,2cyclictest2810556-21kworker/10:2+events21:34:292
269367499310,30cyclictest0-21swapper/923:30:1515
269367499310,30cyclictest0-21swapper/919:26:4015
269367499310,30cyclictest0-21swapper/919:22:5315
2693668993131,0cyclictest0-21swapper/722:26:3213
269366899311,29cyclictest0-21swapper/722:17:0113
269366899310,30cyclictest871ktimers/722:40:2113
2693663993130,1cyclictest2810037-21mii-tool21:20:1511
2693653993131,0cyclictest0-21swapper/223:56:558
2693653993131,0cyclictest0-21swapper/223:37:308
2693653993131,0cyclictest0-21swapper/222:57:508
2693653993131,0cyclictest0-21swapper/222:15:198
2693653993131,0cyclictest0-21swapper/221:53:498
2693653993131,0cyclictest0-21swapper/220:25:178
2693653993131,0cyclictest0-21swapper/200:39:268
2693653993131,0cyclictest0-21swapper/200:05:258
2693653993130,1cyclictest2878607-21kworker/u32:4+flush-259:022:20:428
2693653993128,1cyclictest211rcu_preempt19:15:158
269365399312,29cyclictest0-21swapper/200:10:508
269365399312,0cyclictest2923262-21kworker/2:0-events23:11:348
269365399311,29cyclictest2772230-21kworker/2:1-events21:15:088
269365399310,3cyclictest2755821-21ntpq20:20:208
269365399310,3cyclictest2755821-21ntpq20:20:198
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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