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2026-04-01 - 16:01

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #7, 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 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 rack7slot7s.osadl.org (updated Wed Apr 01, 2026 12:43:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1196429582,9sleep20-21swapper/207:08:422
1171928660,9sleep00-21swapper/007:05:320
1196327857,6sleep10-21swapper/107:08:411
1177927661,9sleep30-21swapper/307:06:183
136512720,2sleep232-21ksoftirqd/209:34:512
1214599314,26cyclictest25800-21df_abs10:20:180
1214599312,27cyclictest6709-21munin-run09:50:000
1214599302,27cyclictest4738-21diskmemload12:09:240
1214599302,27cyclictest4738-21diskmemload10:41:550
1214599291,27cyclictest4738-21diskmemload11:45:060
1214599291,27cyclictest4738-21diskmemload09:24:130
1214599290,28cyclictest4738-21diskmemload10:46:120
1214599290,28cyclictest0-21swapper/009:41:250
1214599290,1cyclictest0-21swapper/007:20:140
1214599282,25cyclictest0-21swapper/012:35:210
1214599280,25cyclictest0-21swapper/010:00:210
1214599280,25cyclictest0-21swapper/007:40:120
1214599272,24cyclictest4738-21diskmemload11:56:360
1214599271,22cyclictest0-21swapper/011:17:550
1214599271,22cyclictest0-21swapper/008:20:000
1214599271,20cyclictest4738-21diskmemload12:30:100
1214599270,26cyclictest0-21swapper/010:10:000
1214599270,25cyclictest0-21swapper/010:25:180
1214599270,0cyclictest0-21swapper/010:53:510
1214599263,22cyclictest4738-21diskmemload11:31:470
1214599261,24cyclictest4738-21diskmemload11:54:140
1214599261,19cyclictest4738-21diskmemload09:36:410
1214599260,20cyclictest11966-21chrt09:52:360
1214599260,1cyclictest0-21swapper/011:10:550
1215199253,20cyclictest32-21ksoftirqd/210:16:032
1214599253,21cyclictest4738-21diskmemload09:13:500
1214599250,3cyclictest4738-21diskmemload11:03:110
1214599250,3cyclictest0-21swapper/012:02:000
1214599250,1cyclictest0-21swapper/009:33:030
239682240,0sleep20-21swapper/211:55:402
1215199240,24cyclictest0-21swapper/211:32:462
1214999240,21cyclictest0-21swapper/110:10:091
1214599242,21cyclictest9753-21pmu-power10:10:220
1214599241,23cyclictest4738-21diskmemload12:11:290
1214599241,19cyclictest3873-21grep09:05:210
1214599240,23cyclictest0-21swapper/011:20:140
1214599240,23cyclictest0-21swapper/010:34:530
1214599240,1cyclictest0-21swapper/011:07:320
1214599233,19cyclictest4738-21diskmemload09:28:140
1214599231,20cyclictest4738-21diskmemload10:59:310
1214599230,2cyclictest0-21swapper/011:36:470
1214599230,22cyclictest4738-21diskmemload09:17:100
1214599230,22cyclictest4738-21diskmemload09:17:100
1214599230,1cyclictest0-21swapper/011:42:510
1214599230,19cyclictest23651-21grep07:30:270
1215599221,21cyclictest0-21swapper/311:36:123
12155992210,0cyclictest141rcu_preempt11:44:193
1215599220,17cyclictest21943-21ssh09:20:143
1214599222,20cyclictest0-21swapper/010:38:300
1214599222,14cyclictest0-21swapper/009:55:330
1214599220,21cyclictest0-21swapper/010:15:340
1214599220,1cyclictest4738-21diskmemload11:29:530
1214599220,1cyclictest4738-21diskmemload11:29:530
12151992120,1cyclictest311rcuc/212:11:422
12151992120,1cyclictest311rcuc/209:19:002
12151992120,1cyclictest311rcuc/209:18:592
12151992118,2cyclictest32-21ksoftirqd/212:40:012
1215199211,2cyclictest141rcu_preempt09:43:392
1214999218,8cyclictest14577-21apt-get09:35:121
1214599211,19cyclictest4738-21diskmemload12:17:090
1214599211,19cyclictest20451-21if_enp0s31f607:25:180
1214599211,19cyclictest0-21swapper/008:35:150
1214599210,2cyclictest0-21swapper/012:27:470
1214599210,19cyclictest0-21swapper/008:10:180
12155992020,0cyclictest0-21swapper/311:24:243
1215599200,4cyclictest0-21swapper/310:55:183
1215199201,18cyclictest0-21swapper/209:38:492
1215199201,17cyclictest13626-21cat11:50:152
1214999209,10cyclictest27429-21sh10:01:351
12149992013,5cyclictest12770-21perf11:50:001
1214599202,14cyclictest32565-21ssh12:20:210
1214599201,18cyclictest24024-21if_err_enp0s31f08:40:160
1214599200,0cyclictest0-21swapper/009:00:140
12155991918,1cyclictest0-21swapper/309:56:563
1215599191,1cyclictest0-21swapper/311:01:203
1215599190,4cyclictest0-21swapper/310:25:243
1215199198,6cyclictest32-21ksoftirqd/210:39:472
12151991917,1cyclictest6713-21awk09:50:002
1215199190,17cyclictest0-21swapper/211:38:272
1214599193,15cyclictest24349-21apt-get07:35:150
1214599190,1cyclictest17147-21ntpq08:25:210
1215599188,1cyclictest141rcu_preempt09:44:573
1215599181,0cyclictest0-21swapper/309:36:513
1215599180,17cyclictest0-21swapper/309:54:503
1215199186,6cyclictest4738-21diskmemload10:10:222
12151991816,1cyclictest32-21ksoftirqd/211:24:232
1215199181,16cyclictest32-21ksoftirqd/211:25:072
1215199181,16cyclictest32-21ksoftirqd/211:25:072
12151991810,6cyclictest4738-21diskmemload11:05:492
12149991817,1cyclictest0-21swapper/110:31:131
1214999180,18cyclictest0-21swapper/112:32:421
1214999180,18cyclictest0-21swapper/112:29:021
1214999180,18cyclictest0-21swapper/112:24:321
1214999180,18cyclictest0-21swapper/110:37:121
1214599180,17cyclictest0-21swapper/007:50:000
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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