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2026-04-09 - 15:38

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #9, 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 50 highest latencies:
System rack9slot4s (updated Thu Apr 09, 2026 12:59:03)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
232959911521129,19cyclictest24032-21iostat_ios07:25:181
232949911301100,17cyclictest24185-21strings07:25:200
232959911281102,20cyclictest8210-21ssh12:40:011
230322664619,30sleep00-21swapper/007:22:500
230452564518,31sleep10-21swapper/107:22:591
1260221110,8sleep00-21swapper/009:23:330
192072900,9sleep02329499cyclictest08:35:250
73772880,6sleep02329499cyclictest10:25:130
23294998362,17cyclictest8227-21latency_hist12:40:010
64992610,8sleep02329499cyclictest12:04:560
175952600,8sleep02329499cyclictest10:35:220
289562560,2sleep028958-21grep09:40:170
294972520,24sleep03-21ksoftirqd/011:20:390
49102491,29sleep04962-21sed09:15:220
153312470,8sleep02329499cyclictest11:06:110
322652450,7sleep02329499cyclictest07:45:200
267052430,3sleep122-21ksoftirqd/109:37:591
218752402,6sleep122-21ksoftirqd/112:20:181
182722400,4sleep02329499cyclictest11:10:110
66752390,9sleep02329499cyclictest10:24:400
2329599397,29cyclictest29186-21cron11:55:001
2329499391,34cyclictest0-21swapper/011:46:350
27682381,33sleep12780-21rm10:54:021
2329599384,11cyclictest81rcu_preempt09:18:091
2329499374,5cyclictest0-21swapper/011:01:560
2329499371,23cyclictest14413-21cron08:25:000
2329599365,4cyclictest81rcu_preempt07:46:001
2329599364,4cyclictest81rcu_preempt07:58:271
23295993617,9cyclictest22-21ksoftirqd/109:20:121
23295993616,6cyclictest22-21ksoftirqd/109:10:591
23294993618,7cyclictest26736-21wget12:25:190
2329599355,4cyclictest81rcu_preempt10:12:331
2329599354,4cyclictest81rcu_preempt12:01:121
2329599354,4cyclictest81rcu_preempt11:35:381
2329599354,10cyclictest81rcu_preempt10:08:221
2329499355,17cyclictest0-21swapper/012:20:490
2329499353,29cyclictest0-21swapper/011:34:350
2329499352,29cyclictest0-21swapper/009:47:160
2329499352,17cyclictest27120-21iostat10:45:190
2329499351,6cyclictest2403-21irqbalance12:13:560
2329499351,6cyclictest2403-21irqbalance12:13:560
23294993513,5cyclictest3-21ksoftirqd/010:14:220
23294993511,7cyclictest8358-21aten_r4power_cu12:40:120
154152351,30sleep115520-21hddtemp_smartct11:40:191
268972341,29sleep127056-21tail08:55:301
2329599346,5cyclictest81rcu_preempt09:45:121
2329599345,5cyclictest81rcu_preempt12:30:271
2329599342,7cyclictest0-21swapper/111:46:551
23295993424,6cyclictest8888-21sh10:25:521
2329599342,28cyclictest0-21swapper/112:47:361
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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