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2025-12-29 - 22:19

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #a, slot #5

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 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
Compare latency of primary with shadow system
Characteristics of the highest latencies:
System rackaslot5s.osadl.org (updated Mon Dec 29, 2025 12:43:34)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811530,0rcu_preempt19-21ksoftirqd/109:20:451
811250,0rcu_preempt14455-21diskmemload09:59:111
811230,0rcu_preempt19-21ksoftirqd/110:33:271
811220,0rcu_preempt19-21ksoftirqd/110:46:231
811220,0rcu_preempt19-21ksoftirqd/110:04:471
811170,0rcu_preempt3-21ksoftirqd/007:35:160
811080,0rcu_preempt3-21ksoftirqd/010:20:150
811030,0rcu_preempt8153-21ssh10:50:261
811020,0rcu_preempt19-21ksoftirqd/107:20:241
81980,0rcu_preempt12529-1kworker/0:4H09:04:540
81960,0rcu_preempt19-21ksoftirqd/111:39:551
81950,0rcu_preempt19-21ksoftirqd/110:58:321
81940,0rcu_preempt19-21ksoftirqd/112:36:021
81940,0rcu_preempt19-21ksoftirqd/110:25:271
81940,0rcu_preempt19-21ksoftirqd/109:15:101
81940,0rcu_preempt19-21ksoftirqd/109:15:101
81930,0rcu_preempt19-21ksoftirqd/111:10:261
81920,0rcu_preempt54-21kswapd010:20:141
81920,0rcu_preempt3-21ksoftirqd/010:30:250
81910,0rcu_preempt17947-1kworker/1:3H11:03:171
81890,0rcu_preempt19-21ksoftirqd/111:32:321
81890,0rcu_preempt19-21ksoftirqd/111:15:141
81880,0rcu_preempt19-21ksoftirqd/112:00:031
81880,0rcu_preempt14455-21diskmemload09:35:181
81880,0rcu_preempt14455-21diskmemload09:35:181
81860,0rcu_preempt19-21ksoftirqd/109:45:061
81860,0rcu_preempt14455-21diskmemload11:05:121
81830,0rcu_preempt19-21ksoftirqd/111:20:261
81830,0rcu_preempt19-21ksoftirqd/108:30:191
81820,0rcu_preempt19-21ksoftirqd/112:10:061
81820,0rcu_preempt19-21ksoftirqd/109:30:071
81810,0rcu_preempt19-21ksoftirqd/111:55:051
81810,0rcu_preempt19-21ksoftirqd/111:55:051
81810,0rcu_preempt19-21ksoftirqd/111:45:051
81810,0rcu_preempt19-21ksoftirqd/108:09:551
81800,0rcu_preempt19-21ksoftirqd/112:15:071
81800,0rcu_preempt19-21ksoftirqd/109:10:061
81800,0rcu_preempt19-21ksoftirqd/107:49:541
81790,0rcu_preempt7497-1kworker/1:0H11:28:241
81770,0rcu_preempt19-21ksoftirqd/112:06:381
81760,0rcu_preempt30287-1kworker/1:0H09:28:431
81750,0rcu_preempt19-21ksoftirqd/108:00:261
81740,0rcu_preempt19-21ksoftirqd/107:43:301
10050740,0irq/346-484840054-21kswapd012:37:330
81720,0rcu_preempt19-21ksoftirqd/110:05:151
8612700,0chrt9950irq/345-484840010:06:070
81690,0rcu_preempt3-21ksoftirqd/010:00:250
299912690,0sleep09950irq/345-484840011:52:580
81680,0rcu_preempt14771-1kworker/1:5H10:35:071
236092680,0sleep09950irq/345-484840011:45:240
81670,0rcu_preempt19-21ksoftirqd/108:14:581
305382670,0chrt9950irq/345-484840008:19:540
81660,0rcu_preempt19-21ksoftirqd/112:26:151
7606996620,0cyclictest2448-1kworker/0:4H11:30:220
244632660,0chrt9950irq/345-484840009:56:150
81650,0rcu_preempt19-21ksoftirqd/109:50:321
81640,0rcu_preempt30181-1kworker/1:1H08:20:201
81640,0rcu_preempt19-21ksoftirqd/108:25:091
81630,0rcu_preempt14455-21diskmemload11:53:581
81630,0rcu_preempt14455-21diskmemload10:18:211
7606996320,0cyclictest7596-1kworker/0:0H07:17:220
7606996320,0cyclictest7596-1kworker/0:0H07:17:220
7606996319,0cyclictest2705-1kworker/0:1H08:39:550
209322630,0sleep09950irq/345-484840009:52:390
81620,0rcu_preempt3-21ksoftirqd/009:31:130
81620,0rcu_preempt19-21ksoftirqd/108:05:271
81620,0rcu_preempt14455-21diskmemload10:14:041
7606996223,0cyclictest14769-1kworker/0:2H10:25:170
7606996214,0cyclictest0-21swapper/011:05:070
81610,0rcu_preempt3-21ksoftirqd/012:20:190
81610,0rcu_preempt3-21ksoftirqd/009:13:590
81610,0rcu_preempt19-21ksoftirqd/108:59:591
81600,0rcu_preempt19-21ksoftirqd/108:39:541
7606995921,0cyclictest6869-1kworker/0:1H09:39:530
7606995921,0cyclictest6869-1kworker/0:1H09:39:530
81580,0rcu_preempt19-21ksoftirqd/110:43:091
7606995826,0cyclictest27377-21apt-get08:10:070
7606995821,0cyclictest25791-1kworker/0:3H09:25:220
7606995820,0cyclictest23629-1kworker/0:2H07:59:560
7606995819,0cyclictest17946-1kworker/0:3H11:03:110
7606995814,0cyclictest13767-1kworker/0:2H11:35:570
7606995719,0cyclictest23779-21ping08:27:340
272392570,0sleep09950irq/345-484840009:23:520
81560,0rcu_preempt19-21ksoftirqd/109:44:051
7606995625,0cyclictest6433-21apt-get08:45:050
7606995523,0cyclictest8349-21runrttasks11:28:180
7606995523,0cyclictest8057-21unixbench_multi10:50:250
7606995522,0cyclictest2536-21taskset11:58:510
7606995522,0cyclictest2536-21taskset11:58:510
7606995522,0cyclictest23629-1kworker/0:2H08:05:090
7606995520,0cyclictest24581-21aten_rapower_po11:10:070
7606995520,0cyclictest10620-21seq10:17:190
81540,0rcu_preempt19-21ksoftirqd/107:50:111
7606995423,0cyclictest22179-21runrttasks09:18:010
7606995423,0cyclictest22179-21runrttasks09:18:010
7606995421,0cyclictest15862-1kworker/0:3H09:48:590
7606995421,0cyclictest1427-21runrttasks10:48:400
7606995417,0cyclictest54-21kswapd011:41:150
81530,0rcu_preempt19-21ksoftirqd/111:35:161
81530,0rcu_preempt19-21ksoftirqd/108:55:191
81530,0rcu_preempt19-21ksoftirqd/108:55:191
7606995325,0cyclictest23714-1kworker/0:0H10:35:130
7606995323,0cyclictest795-1kworker/0:3H11:20:150
7606995322,0cyclictest9109-21latency_hist09:39:550
7606995322,0cyclictest6741-21runrttasks12:03:340
81520,0rcu_preempt19-21ksoftirqd/107:10:141
81520,0rcu_preempt14455-21diskmemload12:30:241
81520,0rcu_preempt14455-21diskmemload12:21:211
7606995223,0cyclictest30206-1kworker/0:2H10:44:390
7606995223,0cyclictest16654-21apt-get12:15:070
7606995222,0cyclictest11392-21apt-get10:55:070
7606995221,0cyclictest22335-1kworker/0:2H11:16:290
7606995218,0cyclictest23997-21ls07:59:550
7606995218,0cyclictest10050irq/346-484840012:05:040
7606995215,0cyclictest0-21swapper/012:32:070
7606995119,0cyclictest10855-21taskset08:56:290
7606995119,0cyclictest10855-21taskset08:56:290
7606995119,0cyclictest0-21swapper/008:19:560
7606995025,0cyclictest10872-21ping07:25:070
7606995024,0cyclictest12294-1kworker/0:2H12:14:230
7606995023,0cyclictest1053-1kworker/0:0H08:30:240
7606995021,0cyclictest0-21swapper/012:25:030
7606995019,0cyclictest17422-21sendmail-msp07:39:560
7606994923,0cyclictest4028-21php-cgi10:10:140
7606994922,0cyclictest14462-21munin-run09:09:540
81480,0rcu_preempt19-21ksoftirqd/108:40:251
81480,0rcu_preempt19-21ksoftirqd/107:39:551
7606994823,0cyclictest7596-1kworker/0:0H07:10:200
7606994815,0cyclictest0-21swapper/007:29:590
7606994718,0cyclictest2705-1kworker/0:1H08:35:090
7606994715,0cyclictest20365-1kworker/0:0H07:50:090
81460,0rcu_preempt3-21ksoftirqd/007:08:520
81460,0rcu_preempt19-21ksoftirqd/108:50:131
7606994616,0cyclictest0-21swapper/007:20:430
7606994517,0cyclictest0-21swapper/008:50:100
7606994516,0cyclictest0-21swapper/007:49:540
81440,0rcu_preempt19-21ksoftirqd/107:15:151
81440,0rcu_preempt19-21ksoftirqd/107:15:151
10050420,0irq/346-484840010872-21ping07:34:181
10050410,0irq/346-484840010872-21ping07:25:301
81400,0rcu_preempt19-21ksoftirqd/107:55:051
81390,0rcu_preempt19-21ksoftirqd/107:05:561
81380,0rcu_preempt19-21ksoftirqd/109:04:551
81370,0rcu_preempt19-21ksoftirqd/108:45:051
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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