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2026-07-05 - 20:15

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 Sun Jul 05, 2026 00:46:17)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3568572404384,13sleep70-21swapper/719:07:5813
3566402370329,14sleep90-21swapper/919:05:3515
3569992359340,13sleep150-21swapper/1519:09:437
3568992355335,13sleep80-21swapper/819:08:3114
3535032355336,12sleep140-21swapper/1419:05:086
3569732352333,12sleep130-21swapper/1319:09:255
3568352349336,9sleep40-21swapper/419:07:3810
3568102349329,12sleep30-21swapper/319:07:229
3566342349329,13sleep50-21swapper/519:05:3111
3569782347327,13sleep10-21swapper/119:09:291
3569592347327,13sleep00-21swapper/019:09:120
3569542347326,14sleep120-21swapper/1219:09:074
3569472346325,14sleep60-21swapper/619:09:0112
3567902346323,15sleep20-21swapper/219:07:058
3534992341321,13sleep110-21swapper/1119:05:053
3567562340323,11sleep100-21swapper/1019:06:412
357467997470,3cyclictest598165-21kworker/u32:1+flush-259:023:00:238
357464996767,0cyclictest0-21swapper/119:15:051
357474995655,1cyclictest310811-21kworker/u32:1-writeback19:15:0510
35750899522,25cyclictest0-21swapper/1422:44:376
357479995252,0cyclictest0-21swapper/620:57:2912
357488995049,1cyclictest623283-21kworker/u32:2+flush-259:000:07:3515
357477994949,0cyclictest0-21swapper/500:39:0311
357483994847,1cyclictest629282-21kworker/u32:4+flush-259:023:31:4513
357464994747,0cyclictest0-21swapper/123:23:291
357508994645,0cyclictest0-21swapper/1422:11:096
357508994644,1cyclictest0-21swapper/1421:40:116
357508994610,11cyclictest566739-21ssh22:33:386
357508994610,11cyclictest0-21swapper/1423:06:356
357479994646,0cyclictest0-21swapper/620:44:5512
357464994646,0cyclictest0-21swapper/122:55:411
357464994646,0cyclictest0-21swapper/120:09:191
357483994544,1cyclictest444438-21kworker/u32:2+events_unbound21:39:0113
357477994545,0cyclictest0-21swapper/523:50:5611
35750899448,11cyclictest0-21swapper/1420:21:506
35747999440,44cyclictest383288-21kworker/6:0-events20:06:1712
357474994444,0cyclictest0-21swapper/421:54:4510
357474994444,0cyclictest0-21swapper/400:39:0310
357464994444,0cyclictest0-21swapper/123:55:251
357464994444,0cyclictest0-21swapper/123:29:271
35750899438,11cyclictest0-21swapper/1423:39:326
357477994343,0cyclictest0-21swapper/522:47:1711
357464994343,0cyclictest0-21swapper/123:42:451
357464994343,0cyclictest0-21swapper/121:22:071
357508994242,0cyclictest347128-21kworker/14:1-events19:15:056
357508994217,25cyclictest0-21swapper/1422:00:416
357477994242,0cyclictest0-21swapper/521:32:0711
357477994242,0cyclictest0-21swapper/500:30:3711
357474994242,0cyclictest0-21swapper/423:50:2310
357464994242,0cyclictest0-21swapper/122:52:011
357464994242,0cyclictest0-21swapper/121:15:451
357464994242,0cyclictest0-21swapper/121:15:441
357464994242,0cyclictest0-21swapper/120:00:471
35750899413,25cyclictest0-21swapper/1423:50:316
35750899413,25cyclictest0-21swapper/1419:37:546
357477994141,0cyclictest0-21swapper/521:18:3111
357477994141,0cyclictest0-21swapper/521:18:3111
357477994141,0cyclictest0-21swapper/500:25:5311
357477994141,0cyclictest0-21swapper/500:17:1911
357477994141,0cyclictest0-21swapper/500:17:1911
357474994141,0cyclictest0-21swapper/400:21:0110
357474994141,0cyclictest0-21swapper/400:21:0110
357464994141,0cyclictest0-21swapper/123:33:051
357464994141,0cyclictest0-21swapper/122:45:591
357464994141,0cyclictest0-21swapper/121:46:071
35750899402,25cyclictest0-21swapper/1422:22:396
35750899402,25cyclictest0-21swapper/1419:26:556
35747999400,40cyclictest0-21swapper/619:40:4112
357477994040,0cyclictest0-21swapper/523:46:2311
357477994040,0cyclictest0-21swapper/522:12:3111
357474994040,0cyclictest0-21swapper/420:52:4510
357474994040,0cyclictest0-21swapper/400:00:4510
357464994040,0cyclictest0-21swapper/122:20:371
357464994040,0cyclictest0-21swapper/121:30:151
35746499400,1cyclictest331ktimers/100:18:321
35746499400,1cyclictest331ktimers/100:18:311
35750899391,25cyclictest0-21swapper/1420:10:516
35747999391,38cyclictest0-21swapper/619:31:1712
357477993939,0cyclictest0-21swapper/523:23:5111
357464993939,0cyclictest310811-21kworker/u32:1+events_unbound19:40:411
357464993939,0cyclictest0-21swapper/123:19:111
357464993939,0cyclictest0-21swapper/119:14:301
357477993838,0cyclictest0-21swapper/523:29:2711
357477993838,0cyclictest0-21swapper/523:09:5111
357477993838,0cyclictest0-21swapper/523:03:1711
357477993838,0cyclictest0-21swapper/522:35:4311
357477993838,0cyclictest0-21swapper/522:22:3911
357477993838,0cyclictest0-21swapper/522:01:5111
357477993838,0cyclictest0-21swapper/520:44:5511
357477993838,0cyclictest0-21swapper/519:28:1311
357474993838,0cyclictest0-21swapper/422:22:3110
357464993837,0cyclictest0-21swapper/119:57:271
35746499380,38cyclictest0-21swapper/123:14:341
357508993737,0cyclictest0-21swapper/1400:39:036
357477993737,0cyclictest0-21swapper/521:47:0911
357477993737,0cyclictest0-21swapper/521:25:2711
357477993737,0cyclictest0-21swapper/520:55:5711
357477993737,0cyclictest0-21swapper/520:06:1711
357477993736,1cyclictest544510-21kworker/5:1-events22:31:3311
357474993737,0cyclictest0-21swapper/423:39:1710
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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