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2026-07-28 - 22:10

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 Jul 28, 2026 00:45:12)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
125878127859,18sleep60-21swapper/619:08:1512
125885526033,1sleep10-21swapper/119:08:581
125937099567,25cyclictest618598-21thunderbird00:29:156
1259349994949,0cyclictest0-21swapper/722:41:4713
418998450,43rtkit-daemon0-21swapper/719:06:1113
125879324543,1sleep140-21swapper/1419:08:236
125864624442,1sleep120-21swapper/1219:06:454
125542024442,1sleep90-21swapper/919:05:0615
1259337994342,1cyclictest0-21swapper/320:48:519
1259337994342,1cyclictest0-21swapper/320:48:519
1259360994241,1cyclictest1332283-21kworker/u32:5+events_unbound20:50:193
1259360994241,1cyclictest1332283-21kworker/u32:5+events_unbound20:50:183
1259360994241,1cyclictest1258852-1kworker/u33:1+i915_flip20:48:513
1259360994241,1cyclictest1258852-1kworker/u33:1+i915_flip20:48:513
125882424239,2sleep20-21swapper/219:08:448
125881924239,2sleep150-21swapper/1519:08:407
125882124139,1sleep00-21swapper/019:08:410
125860623937,1sleep130-21swapper/1319:06:145
125859823937,1sleep50-21swapper/519:06:0611
1259360993836,0cyclictest0-21swapper/1119:21:293
1259337993837,1cyclictest1510525-21kworker/u32:1+events_unbound23:30:239
1259333993834,4cyclictest1523938-21kworker/u32:2+flush-259:023:31:058
1259328993838,0cyclictest0-21swapper/000:28:410
125864523836,1sleep110-21swapper/1119:06:443
1259360993736,1cyclictest1483604-21kworker/u32:1+events_unbound22:50:203
125880823734,1sleep80-21swapper/819:08:3314
1259370993613,10cyclictest618598-21thunderbird20:05:386
1259360993635,1cyclictest1465717-21kworker/u32:3+events_unbound23:10:203
1259337993535,0cyclictest1240582-21kworker/3:2-events19:19:259
1259328993535,0cyclictest0-21swapper/000:23:320
125861623532,2sleep40-21swapper/419:06:2110
1259370993410,11cyclictest618598-21thunderbird21:00:336
1259370993410,11cyclictest0-21swapper/1421:55:286
1259349993415,0cyclictest0-21swapper/700:34:0413
1259345993432,2cyclictest1319712-21kworker/u32:0+events_unbound22:15:2112
1259337993434,0cyclictest0-21swapper/320:40:379
1259333993428,3cyclictest618598-21thunderbird23:40:478
1259333993428,3cyclictest618598-21thunderbird23:22:298
1259333993428,3cyclictest618598-21thunderbird20:04:208
1259333993427,4cyclictest618598-21thunderbird23:18:008
1259328993434,0cyclictest0-21swapper/000:10:210
125763323432,1sleep100-21swapper/1019:05:232
1259372993331,2cyclictest1618949-21kworker/u32:4+events_unbound00:35:157
125937099339,11cyclictest0-21swapper/1423:01:236
125936499330,31cyclictest618598-21thunderbird20:21:084
1259343993328,5cyclictest1774-21snmpd19:24:4811
125934399330,30cyclictest618598-21thunderbird20:53:1011
125934399330,30cyclictest618598-21thunderbird20:53:0911
1259333993327,3cyclictest618598-21thunderbird22:48:518
125933399330,31cyclictest0-21swapper/221:49:578
125933399330,31cyclictest0-21swapper/221:34:028
125933399330,30cyclictest618698-21WRScene~ilder#122:40:158
125932899330,33cyclictest618598-21thunderbird23:14:250
125937299320,29cyclictest0-21swapper/1519:20:147
125937099328,11cyclictest0-21swapper/1419:10:436
125936499320,32cyclictest0-21swapper/1223:51:484
125936499320,32cyclictest0-21swapper/1223:51:474
125936499320,31cyclictest0-21swapper/1220:25:164
1259360993231,1cyclictest1556856-21kworker/u32:1+events_unbound00:25:293
1259333993231,1cyclictest1223238-1kworker/u33:0+i915_flip19:47:068
1259333993230,1cyclictest0-21swapper/220:18:008
1259333993228,3cyclictest618598-21thunderbird00:25:548
1259333993228,2cyclictest618598-21thunderbird20:13:128
1259333993228,1cyclictest618598-21thunderbird22:58:038
1259333993227,3cyclictest618598-21thunderbird22:17:038
1259333993227,2cyclictest618598-21thunderbird23:27:168
125933399320,30cyclictest0-21swapper/222:21:598
125933399320,30cyclictest0-21swapper/221:15:518
125933399320,30cyclictest0-21swapper/221:12:248
125933399320,29cyclictest0-21swapper/222:38:298
125933399320,29cyclictest0-21swapper/200:12:358
125932899320,29cyclictest0-21swapper/023:45:160
125932899320,29cyclictest0-21swapper/023:45:150
125882823230,1sleep30-21swapper/319:08:449
125937099310,30cyclictest0-21swapper/1422:02:426
1259364993130,1cyclictest1774-21snmpd00:06:454
125935799310,30cyclictest0-21swapper/1000:01:572
125935199310,2cyclictest618598-21thunderbird19:31:1514
125934999310,31cyclictest618598-21thunderbird23:51:2413
125934999310,31cyclictest618598-21thunderbird23:51:2313
125934999310,30cyclictest0-21swapper/722:20:0513
1259343993128,3cyclictest1774-21snmpd22:33:1511
125934399310,30cyclictest0-21swapper/521:01:1811
1259337993131,0cyclictest0-21swapper/319:40:169
1259337993129,1cyclictest1774-21snmpd20:55:589
1259337993129,1cyclictest1774-21snmpd20:55:579
1259333993128,3cyclictest618598-21thunderbird23:38:328
1259333993128,3cyclictest618598-21thunderbird22:13:548
1259333993128,3cyclictest618598-21thunderbird00:35:168
1259333993128,2cyclictest618598-21thunderbird20:33:498
1259333993128,2cyclictest618598-21thunderbird19:17:208
1259333993127,4cyclictest618698-21WRScene~ilder#123:52:188
1259333993127,4cyclictest618698-21WRScene~ilder#123:52:178
1259333993127,4cyclictest618598-21thunderbird23:47:048
1259333993127,4cyclictest618598-21thunderbird23:47:038
1259333993127,4cyclictest618598-21thunderbird21:59:038
1259333993127,4cyclictest618598-21thunderbird20:08:058
125933399310,30cyclictest782-21systemd-journal22:50:058
125933399310,29cyclictest0-21swapper/222:30:548
125933399310,29cyclictest0-21swapper/221:53:128
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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