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2026-08-10 - 04:33

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 Mon Aug 10, 2026 00:45:39)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
18149012429418,7sleep150-21swapper/1519:05:387
18150922386380,4sleep00-21swapper/019:08:030
18149352368362,4sleep80-21swapper/819:06:0314
18117542354345,6sleep140-21swapper/1419:05:056
18149372351342,6sleep100-21swapper/1019:06:052
18150932345336,6sleep10-21swapper/119:08:041
18117592342334,5sleep20-21swapper/219:05:098
18152542340330,6sleep70-21swapper/719:09:4713
18150442338329,6sleep90-21swapper/919:07:2415
18151202334324,7sleep40-21swapper/419:08:2310
18149742327320,4sleep50-21swapper/519:06:3211
18149272324315,6sleep30-21swapper/319:05:589
18151652323314,6sleep60-21swapper/619:08:5712
18151272321313,5sleep110-21swapper/1119:08:303
18149182310300,7sleep120-21swapper/1219:05:514
181496529691,3sleep130-21swapper/1319:06:245
1815745995820,14cyclictest618598-21thunderbird22:13:026
1815709995049,1cyclictest1984409-21kworker/u32:1+events_unbound22:30:148
181574599457,25cyclictest0-21swapper/1423:51:546
181574599457,25cyclictest0-21swapper/1422:24:026
181574599457,25cyclictest0-21swapper/1421:40:056
181574599457,25cyclictest0-21swapper/1420:12:136
181574599447,24cyclictest0-21swapper/1422:35:006
181574599424,25cyclictest0-21swapper/1423:40:546
1815709994241,1cyclictest1917071-21kworker/u32:2+events_unbound21:27:138
181570999410,2cyclictest2147421-21kworker/2:2+mm_percpu_wq00:18:538
181574599401,14cyclictest0-21swapper/1420:01:146
1815709994039,1cyclictest2061382-21kworker/u32:1+events_unbound23:13:538
181570999400,28cyclictest0-21swapper/222:19:598
1815709993938,1cyclictest618598-21thunderbird21:16:458
1815709993938,1cyclictest618598-21thunderbird00:29:478
19803652380,0chrt0-21swapper/1221:57:364
1815709993837,1cyclictest618698-21WRScene~ilder#122:06:318
1815709993837,1cyclictest618598-21thunderbird20:35:178
1815709993837,1cyclictest618598-21thunderbird00:22:238
1815745993723,14cyclictest618598-21thunderbird21:29:066
1815709993736,1cyclictest618698-21WRScene~ilder#123:53:218
1815709993736,1cyclictest618698-21WRScene~ilder#123:03:118
1815709993736,1cyclictest618698-21WRScene~ilder#122:47:218
1815709993736,1cyclictest618698-21WRScene~ilder#119:17:138
1815709993735,2cyclictest618598-21thunderbird19:49:238
1815709993735,2cyclictest0-21swapper/219:55:198
1815709993734,3cyclictest618680-21Compositor22:59:058
1815709993734,1cyclictest1862685-21kworker/2:0-events20:04:218
1815709993733,3cyclictest618698-21WRScene~ilder#121:02:558
1815709993732,3cyclictest1986970-21kworker/2:0-events22:10:278
1815709993730,4cyclictest0-21swapper/221:48:428
181574599360,11cyclictest618598-21thunderbird00:35:496
181574599360,11cyclictest0-21swapper/1419:17:186
1815721993634,2cyclictest2029247-21kworker/u32:0+events_unbound23:00:1812
1815709993635,1cyclictest618698-21WRScene~ilder#120:18:258
1815709993635,1cyclictest618698-21WRScene~ilder#100:08:088
1815709993635,1cyclictest618598-21thunderbird21:23:518
1815709993635,1cyclictest1887794-21kworker/u32:0+events_unbound20:40:178
1815709993634,2cyclictest618598-21thunderbird22:53:358
1815709993634,1cyclictest618698-21WRScene~ilder#123:17:128
1815709993633,3cyclictest0-21swapper/221:56:118
1815709993633,3cyclictest0-21swapper/200:37:038
1815709993633,1cyclictest618698-21WRScene~ilder#122:41:368
1815709993632,2cyclictest618619-21glean.dispatche23:57:308
1815709993632,2cyclictest618619-21glean.dispatche23:57:298
1815709993629,3cyclictest618598-21thunderbird19:37:038
1815709993628,2cyclictest211rcu_preempt00:33:518
1815721993530,4cyclictest2112394-21mii-tool23:40:1612
1815709993534,1cyclictest618598-21thunderbird19:25:578
1815709993533,2cyclictest618700-21WRRende~ckend#123:23:388
1815709993533,2cyclictest0-21swapper/221:54:158
1815709993533,2cyclictest0-21swapper/200:02:158
1815709993533,2cyclictest0-21swapper/200:02:158
1815709993533,0cyclictest0-21swapper/221:12:398
1815709993533,0cyclictest0-21swapper/219:20:218
1815709993532,3cyclictest0-21swapper/219:50:318
1815709993532,2cyclictest618598-21thunderbird23:41:438
1815709993532,1cyclictest618698-21WRScene~ilder#122:37:148
1815709993530,2cyclictest211rcu_preempt23:25:268
1815709993530,2cyclictest0-21swapper/223:45:278
1815709993528,5cyclictest0-21swapper/223:33:278
1815709993528,3cyclictest618698-21WRScene~ilder#123:36:138
1815709993527,1cyclictest211rcu_preempt22:03:098
1815709993523,12cyclictest0-21swapper/221:41:568
181570999350,31cyclictest0-21swapper/219:10:378
1815745993434,0cyclictest0-21swapper/1423:29:176
1815729993428,5cyclictest618700-21WRRende~ckend#121:37:2514
1815712993431,3cyclictest0-21swapper/323:05:299
1815709993434,0cyclictest0-21swapper/222:16:138
1815709993434,0cyclictest0-21swapper/219:30:198
1815709993430,2cyclictest0-21swapper/200:12:128
1815709993429,2cyclictest618698-21WRScene~ilder#120:20:108
1815709993429,2cyclictest618598-21thunderbird23:08:058
1815709993429,2cyclictest618598-21thunderbird20:54:438
1815709993429,2cyclictest618598-21thunderbird20:54:438
181570999342,30cyclictest0-21swapper/221:31:278
1815745993333,0cyclictest0-21swapper/1421:37:276
181572199330,1cyclictest0-21swapper/622:30:1312
181571299334,0cyclictest0-21swapper/322:30:059
1815712993333,0cyclictest0-21swapper/322:24:499
1815712993333,0cyclictest0-21swapper/300:04:319
1815712993333,0cyclictest0-21swapper/300:04:319
1815709993332,1cyclictest0-21swapper/220:34:238
1815709993332,1cyclictest0-21swapper/220:05:258
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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