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2026-07-29 - 23:27

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 Wed Jul 29, 2026 00:45:08)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
10070712580,0sleep80-21swapper/819:20:1214
996375995656,0cyclictest962074-1kworker/u33:0+i915_flip22:30:228
996402994948,1cyclictest618598-21thunderbird00:13:033
996375994847,1cyclictest1316829-21kworker/u32:3+events_unbound00:12:568
99587824644,1sleep140-21swapper/1419:09:076
99587824644,1sleep140-21swapper/1419:09:066
99572024644,1sleep40-21swapper/419:07:0410
99572024644,1sleep40-21swapper/419:07:0310
99584124442,1sleep00-21swapper/019:08:370
99584124442,1sleep00-21swapper/019:08:370
99562624442,1sleep120-21swapper/1219:05:524
99562624442,1sleep120-21swapper/1219:05:514
99414724442,1sleep70-21swapper/719:05:1513
99414724442,1sleep70-21swapper/719:05:1413
996375994342,1cyclictest1255943-21kworker/u32:5+flush-259:023:20:208
996375994240,2cyclictest999950-21kworker/u32:3+events_unbound19:14:158
996375994240,2cyclictest999950-21kworker/u32:3+events_unbound19:14:148
996375994236,6cyclictest618598-21thunderbird23:54:268
996386994140,1cyclictest1255943-21kworker/u32:5+events_unbound23:59:2112
996375994140,1cyclictest618598-21thunderbird21:10:198
996386994040,0cyclictest0-21swapper/623:07:0612
996375994039,1cyclictest618698-21WRScene~ilder#121:56:198
996375994039,1cyclictest618598-21thunderbird22:13:558
996375994039,1cyclictest618598-21thunderbird21:20:278
996375994039,1cyclictest618598-21thunderbird19:35:148
996386993938,1cyclictest1316829-21kworker/u32:3+events_unbound00:15:2012
996386993938,1cyclictest1120008-21kworker/u32:1+events_unbound21:50:1812
996375993938,1cyclictest618698-21WRScene~ilder#121:04:438
996375993938,1cyclictest618598-21thunderbird23:14:448
996375993938,1cyclictest618598-21thunderbird20:48:488
996375993938,1cyclictest618598-21thunderbird20:04:438
996375993938,1cyclictest618598-21thunderbird19:58:548
996375993938,1cyclictest618598-21thunderbird19:25:048
996375993937,2cyclictest618598-21thunderbird20:52:178
996375993936,3cyclictest618598-21thunderbird20:56:028
996375993936,2cyclictest618598-21thunderbird22:49:248
99641099382,25cyclictest0-21swapper/1423:55:066
99641099380,25cyclictest0-21swapper/1423:33:086
996402993838,0cyclictest0-21swapper/1123:47:283
996378993835,3cyclictest0-21swapper/322:37:279
996375993837,1cyclictest618598-21thunderbird23:31:368
996375993837,1cyclictest618598-21thunderbird22:24:378
996375993837,1cyclictest618598-21thunderbird22:07:358
996375993837,1cyclictest618598-21thunderbird22:07:348
996375993837,1cyclictest618598-21thunderbird20:06:028
996375993837,1cyclictest618598-21thunderbird00:04:588
996375993835,3cyclictest618598-21thunderbird20:15:228
996375993835,3cyclictest0-21swapper/200:25:138
996375993835,1cyclictest618598-21thunderbird21:37:558
996375993833,1cyclictest211rcu_preempt23:15:068
99637599383,29cyclictest211rcu_preempt22:16:308
99578823836,1sleep60-21swapper/619:07:5412
99578823836,1sleep60-21swapper/619:07:5312
996402993737,0cyclictest0-21swapper/1100:00:233
996375993737,0cyclictest1128690-21ssh21:32:278
996375993736,1cyclictest618641-21Timer19:34:518
996375993736,1cyclictest618598-21thunderbird23:55:058
996375993736,1cyclictest618598-21thunderbird22:56:588
996375993736,1cyclictest618598-21thunderbird21:51:218
996375993736,1cyclictest618598-21thunderbird19:45:468
996375993736,1cyclictest618598-21thunderbird19:23:378
996375993736,1cyclictest618598-21thunderbird19:17:228
996375993735,2cyclictest618598-21thunderbird21:18:018
996375993734,3cyclictest618598-21thunderbird00:35:048
996375993734,3cyclictest618598-21thunderbird00:05:298
996375993734,3cyclictest0-21swapper/219:40:258
996375993734,1cyclictest618698-21WRScene~ilder#123:03:168
99590923734,2sleep80-21swapper/819:09:3314
99590923734,2sleep80-21swapper/819:09:3214
99560723736,0sleep150-21swapper/1519:05:397
99560723736,0sleep150-21swapper/1519:05:387
99641099368,4cyclictest618598-21thunderbird19:20:306
996402993635,1cyclictest1282582-21kworker/u32:1+events_unbound23:35:203
996391993636,0cyclictest0-21swapper/700:38:1813
996386993636,0cyclictest0-21swapper/600:27:0212
996375993635,1cyclictest618598-21thunderbird20:28:588
996375993635,1cyclictest618598-21thunderbird20:12:518
996375993635,1cyclictest618598-21thunderbird00:16:018
996375993635,1cyclictest1038788-21kworker/u32:4+events_unbound20:23:578
996375993635,1cyclictest0-21swapper/223:26:348
996375993634,2cyclictest0-21swapper/222:41:148
996375993634,0cyclictest0-21swapper/223:38:178
996375993633,2cyclictest618598-21thunderbird22:54:408
99558623634,1sleep10-21swapper/119:05:251
99558623634,1sleep10-21swapper/119:05:241
996402993534,1cyclictest960787-21kworker/u32:4+flush-259:019:15:173
996402993534,1cyclictest1080958-21kworker/u32:0+events_unbound20:55:213
996391993535,0cyclictest0-21swapper/722:58:5313
996391993535,0cyclictest0-21swapper/721:48:5913
996386993535,0cyclictest0-21swapper/623:03:4812
996386993535,0cyclictest0-21swapper/621:35:2012
996375993534,1cyclictest618598-21thunderbird21:09:028
996375993533,2cyclictest0-21swapper/223:49:358
996375993533,2cyclictest0-21swapper/223:05:228
996375993533,2cyclictest0-21swapper/222:00:198
996375993533,2cyclictest0-21swapper/222:00:198
996375993533,2cyclictest0-21swapper/200:24:448
996375993533,0cyclictest0-21swapper/223:41:548
996375993532,3cyclictest618598-21thunderbird20:41:238
996375993532,3cyclictest0-21swapper/222:29:478
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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