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2026-08-02 - 01:15

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 Sat Aug 01, 2026 00:45:19)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1001792391381,7sleep100-21swapper/1019:06:202
1004542375368,4sleep50-21swapper/519:09:4411
1002362364356,5sleep70-21swapper/719:07:0513
1001682358350,5sleep20-21swapper/219:06:128
1003912357349,5sleep110-21swapper/1119:09:013
1003882350342,5sleep80-21swapper/819:08:5814
1001762341333,5sleep90-21swapper/919:06:1815
1001202336329,5sleep10-21swapper/119:05:391
1003532322314,5sleep150-21swapper/1519:08:347
1004432319309,6sleep120-21swapper/1219:09:344
1002682314306,5sleep140-21swapper/1419:07:276
1001912292284,5sleep30-21swapper/319:06:299
1004802285276,6sleep40-21swapper/419:09:5910
1002562180173,5sleep60-21swapper/619:07:2012
100265210096,2sleep130-21swapper/1319:07:265
10039729694,1sleep00-21swapper/019:09:070
100940995550,2cyclictest3318-21Xorg21:00:3110
100940995550,2cyclictest3318-21Xorg21:00:3110
100974994810,25cyclictest618598-21thunderbird22:01:436
100934994413,28cyclictest277597-21kworker/u32:0+flush-259:022:21:458
100951994040,0cyclictest15105-1kworker/u33:2+i915_flip19:30:1113
100938993939,0cyclictest0-21swapper/322:20:419
100938993938,1cyclictest407065-21kworker/u32:3+events_unbound23:50:199
100968993838,0cyclictest0-21swapper/1219:50:204
100938993837,1cyclictest277597-21kworker/u32:0+events_unbound23:04:499
100940993737,0cyclictest0-21swapper/422:20:4010
100934993733,2cyclictest158917-21kworker/u32:3+events_unbound20:20:018
100974993636,0cyclictest15105-1kworker/u33:2+i915_flip20:10:026
100940993636,0cyclictest189774-1kworker/u33:0+i915_flip23:19:0810
100940993534,1cyclictest407065-21kworker/u32:3+events_unbound00:30:1910
100938993535,0cyclictest0-21swapper/300:03:059
100938993535,0cyclictest0-21swapper/300:03:059
100940993433,1cyclictest129558-21kworker/u32:2+flush-259:020:05:2110
10097499338,25cyclictest0-21swapper/1419:49:556
100965993332,1cyclictest0-21swapper/1119:39:173
100940993332,1cyclictest185305-21kworker/u32:5+flush-259:020:53:0110
100938993333,0cyclictest189774-1kworker/u33:0+i915_flip23:42:189
100938993332,1cyclictest189840-21kworker/u32:1+events_unbound22:10:149
10093499333,30cyclictest4177600-21kworker/u32:1+events_unbound20:14:228
100934993329,4cyclictest618598-21thunderbird22:39:318
10093499330,31cyclictest618598-21thunderbird22:13:478
10093499330,31cyclictest618598-21thunderbird20:06:178
10093499330,31cyclictest618598-21thunderbird19:32:388
10093499330,30cyclictest782-21systemd-journal22:29:588
10097499328,11cyclictest0-21swapper/1423:51:336
10097499328,11cyclictest0-21swapper/1422:56:376
10097499328,11cyclictest0-21swapper/1421:50:436
10097499328,11cyclictest0-21swapper/1420:00:546
10097499328,11cyclictest0-21swapper/1400:02:326
10097499328,11cyclictest0-21swapper/1400:02:326
100970993232,0cyclictest196697-21kworker/u32:2+events_unbound21:00:185
100970993232,0cyclictest196697-21kworker/u32:2+events_unbound21:00:175
100956993232,0cyclictest0-21swapper/822:36:2214
100940993232,0cyclictest0-21swapper/422:45:4110
100934993230,1cyclictest3578-21gnome-shell19:22:548
100934993229,3cyclictest618598-21thunderbird23:51:158
100934993229,2cyclictest618598-21thunderbird20:58:528
100934993229,2cyclictest618598-21thunderbird20:58:518
100934993229,1cyclictest782-21systemd-journal21:08:558
10093499320,32cyclictest618598-21thunderbird00:33:518
10093499320,30cyclictest618598-21thunderbird23:42:498
10093499320,30cyclictest618598-21thunderbird22:50:598
10093499320,30cyclictest618598-21thunderbird21:13:048
10093499320,30cyclictest618598-21thunderbird20:51:578
10093499320,29cyclictest0-21swapper/223:39:098
10093499320,29cyclictest0-21swapper/223:13:418
10093499320,29cyclictest0-21swapper/223:05:298
10093499320,29cyclictest0-21swapper/223:02:038
10093499320,29cyclictest0-21swapper/221:53:558
10093499320,29cyclictest0-21swapper/221:23:378
10093499320,29cyclictest0-21swapper/220:32:038
10093499320,29cyclictest0-21swapper/219:50:098
10093499320,29cyclictest0-21swapper/219:41:088
10093499320,29cyclictest0-21swapper/200:26:398
10093499320,29cyclictest0-21swapper/200:15:338
100932993229,3cyclictest1774-21snmpd00:02:521
100932993229,3cyclictest1774-21snmpd00:02:521
100976993130,1cyclictest1774-21snmpd23:30:487
100976993130,1cyclictest1774-21snmpd19:23:067
10097499310,2cyclictest618598-21thunderbird22:35:496
100963993130,1cyclictest425038-21kworker/10:2+events00:11:312
100963993130,1cyclictest342673-21kworker/10:1+events23:27:042
100963993130,1cyclictest328659-21kworker/10:0+events22:57:192
100963993130,1cyclictest256539-21kworker/10:0+events22:05:192
100963993130,1cyclictest179622-21mii-tool20:40:152
100963993130,1cyclictest1774-21snmpd22:28:222
10096399310,30cyclictest0-21swapper/1023:55:272
10096399310,30cyclictest0-21swapper/1023:55:272
10095999310,29cyclictest0-21swapper/900:20:1815
100945993131,0cyclictest0-21swapper/622:13:4312
100943993130,1cyclictest1774-21snmpd19:27:5711
10094399310,30cyclictest0-21swapper/523:15:1611
10094399310,30cyclictest0-21swapper/520:19:0911
10094399310,1cyclictest0-21swapper/521:55:1511
100940993130,1cyclictest113926-21kworker/u32:4+events_unbound19:40:2310
100938993131,0cyclictest0-21swapper/322:45:409
100938993131,0cyclictest0-21swapper/300:35:199
100934993126,3cyclictest0-21swapper/219:37:238
10093499310,31cyclictest782-21systemd-journal22:01:338
10093499310,31cyclictest618598-21thunderbird19:48:428
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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