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2026-08-25 - 06:43

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #f, slot #7

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.
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.

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 50 highest latencies:
System rackfslot7s.osadl.org (updated Tue Aug 25, 2026 00:44:19)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
90864599371516,3694cyclictest974680-21kworker/0:1+events22:40:170
90865099292916,2909cyclictest997014-21kworker/1:2+events00:10:201
90864599284113,2824cyclictest980704-21kworker/0:1+events22:55:290
9086599927978,2785cyclictest985915-21kworker/3:2+events23:15:163
90865999277312,2757cyclictest1004583-21kworker/3:2+events00:18:193
90865999275113,2735cyclictest941076-21kworker/3:2+events21:00:183
90865099274613,2729cyclictest1004579-21kworker/1:1+events00:35:121
90865099274013,2723cyclictest997014-21kworker/1:2+events00:20:131
90865099270812,2692cyclictest929702-21kworker/1:0+events20:14:561
90864599269913,2682cyclictest936077-21kworker/0:0+events20:40:010
90865099269813,2681cyclictest945972-21kworker/1:0+events21:22:431
90865099269712,2683cyclictest953756-21kworker/1:2+events21:30:211
90865099269712,2681cyclictest937468-21kworker/1:2+events21:00:391
90865499268113,2664cyclictest988975-21kworker/2:2+events23:20:142
90865999267413,2657cyclictest929451-21kworker/3:0+events20:15:193
90865099266113,2644cyclictest928018-21kworker/1:1+events20:20:431
90865099266113,2644cyclictest928018-21kworker/1:1+events20:20:431
90865999264413,2627cyclictest985915-21kworker/3:2+events23:20:353
90865499259612,2580cyclictest956677-21kworker/2:2+events21:40:392
90864599257010,2556cyclictest961641-21kworker/0:2+events22:15:170
90864599257010,2556cyclictest961641-21kworker/0:2+events22:15:170
90865499256612,2550cyclictest960281-21kworker/2:2+events21:49:432
90865499256212,2546cyclictest928134-21kworker/2:2+events20:13:472
90864599256112,2545cyclictest976488-21kworker/0:0+events22:49:220
90865499256011,2546cyclictest945653-21kworker/2:1+events21:05:132
90865499255512,2539cyclictest967987-21kworker/2:1+events22:11:512
9086459925531,2548cyclictest993597-21kworker/0:1+events23:39:370
90865999255212,2536cyclictest953555-21kworker/3:1+events21:41:253
90865499254911,2534cyclictest916790-21kworker/2:2+events19:47:552
90864599254911,2534cyclictest993597-21kworker/0:1+events00:02:230
9086599925477,2536cyclictest972449-21kworker/3:0+events22:26:163
90865999254712,2532cyclictest980823-21kworker/3:1+events22:57:253
90865999254512,2529cyclictest953555-21kworker/3:1+events21:48:593
90865999254212,2526cyclictest941076-21kworker/3:2+events20:56:513
90865999254210,2529cyclictest968075-21kworker/3:2+events22:14:103
90865499254212,2526cyclictest929863-21kworker/2:0+events20:22:582
90865499254212,2526cyclictest929863-21kworker/2:0+events20:22:582
90864599254012,2524cyclictest993597-21kworker/0:1+events00:07:190
90865499253913,2523cyclictest942355-21kworker/2:0+events20:58:232
90865099253512,2520cyclictest995340-21kworker/1:1+events23:50:341
90865999252812,2512cyclictest935929-21kworker/3:0+events20:36:323
90865499252812,2513cyclictest916790-21kworker/2:2+events19:40:412
90864599252711,2511cyclictest961641-21kworker/0:2+events21:56:590
90865999252611,2513cyclictest999703-21kworker/3:2+events00:00:023
90865099252012,2504cyclictest945972-21kworker/1:0+events21:39:321
90865499251312,2497cyclictest982665-21kworker/2:2+events23:03:572
9086599925125,2502cyclictest919899-21kworker/3:2+events19:45:153
90865999251112,2496cyclictest955168-21kworker/3:0+events22:00:283
90865499250910,2495cyclictest979144-21kworker/2:0+events22:52:262
90865999250411,2490cyclictest979205-21kworker/3:0+events23:04:213
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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