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2026-04-06 - 20:29

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 Apr 06, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811000,0rcu_preempt19-21ksoftirqd/110:13:311
81990,0rcu_preempt19-21ksoftirqd/111:32:091
81980,0rcu_preempt19-21ksoftirqd/112:25:111
81970,0rcu_preempt19-21ksoftirqd/111:51:251
81970,0rcu_preempt19-21ksoftirqd/109:45:141
81950,0rcu_preempt19-21ksoftirqd/112:19:561
81950,0rcu_preempt19-21ksoftirqd/110:28:211
81950,0rcu_preempt19-21ksoftirqd/110:28:211
81950,0rcu_preempt19-21ksoftirqd/110:07:541
81950,0rcu_preempt19-21ksoftirqd/109:32:221
81950,0rcu_preempt19-21ksoftirqd/107:58:521
81930,0rcu_preempt19-21ksoftirqd/112:34:461
81930,0rcu_preempt19-21ksoftirqd/110:51:561
81930,0rcu_preempt19-21ksoftirqd/110:31:481
81920,0rcu_preempt19-21ksoftirqd/112:30:471
81920,0rcu_preempt19-21ksoftirqd/111:25:071
81920,0rcu_preempt19-21ksoftirqd/110:46:271
81920,0rcu_preempt19-21ksoftirqd/109:18:391
81910,0rcu_preempt19-21ksoftirqd/111:58:351
81910,0rcu_preempt19-21ksoftirqd/111:34:181
81900,0rcu_preempt19-21ksoftirqd/109:22:521
81890,0rcu_preempt19-21ksoftirqd/111:17:031
81880,0rcu_preempt19-21ksoftirqd/112:12:591
81880,0rcu_preempt19-21ksoftirqd/111:45:451
81870,0rcu_preempt19-21ksoftirqd/110:22:341
81860,0rcu_preempt19-21ksoftirqd/107:33:531
81850,0rcu_preempt19-21ksoftirqd/108:05:481
81840,0rcu_preempt27988-21diskmemload09:26:501
81840,0rcu_preempt19-21ksoftirqd/109:57:331
81840,0rcu_preempt19-21ksoftirqd/109:57:331
81840,0rcu_preempt19-21ksoftirqd/108:21:591
81840,0rcu_preempt19-21ksoftirqd/108:12:431
81840,0rcu_preempt19-21ksoftirqd/107:58:191
81830,0rcu_preempt19-21ksoftirqd/110:00:531
81830,0rcu_preempt19-21ksoftirqd/107:42:041
81830,0rcu_preempt19-21ksoftirqd/107:29:441
81820,0rcu_preempt54-21kswapd010:58:541
81820,0rcu_preempt19-21ksoftirqd/109:52:571
81820,0rcu_preempt19-21ksoftirqd/107:27:371
81820,0rcu_preempt19-21ksoftirqd/107:08:571
81810,0rcu_preempt19-21ksoftirqd/110:13:561
81810,0rcu_preempt19-21ksoftirqd/108:25:521
81800,0rcu_preempt54-21kswapd010:40:181
81800,0rcu_preempt19-21ksoftirqd/111:03:551
81800,0rcu_preempt19-21ksoftirqd/109:41:051
81800,0rcu_preempt19-21ksoftirqd/109:08:471
81790,0rcu_preempt19-21ksoftirqd/112:03:501
81790,0rcu_preempt19-21ksoftirqd/111:10:191
81790,0rcu_preempt19-21ksoftirqd/111:10:191
81790,0rcu_preempt19-21ksoftirqd/107:22:211
81780,0rcu_preempt19-21ksoftirqd/112:00:081
81780,0rcu_preempt19-21ksoftirqd/111:41:221
81780,0rcu_preempt19-21ksoftirqd/108:17:001
81770,0rcu_preempt19-21ksoftirqd/110:35:071
81770,0rcu_preempt19-21ksoftirqd/110:35:071
81770,0rcu_preempt19-21ksoftirqd/109:37:221
81770,0rcu_preempt19-21ksoftirqd/107:18:071
81750,0rcu_preempt19-21ksoftirqd/110:54:001
81740,0rcu_preempt19-21ksoftirqd/111:21:191
81720,0rcu_preempt19-21ksoftirqd/107:43:531
81710,0rcu_preempt19-21ksoftirqd/112:15:311
81710,0rcu_preempt19-21ksoftirqd/108:38:561
81700,0rcu_preempt19-21ksoftirqd/109:03:031
81700,0rcu_preempt19-21ksoftirqd/108:28:551
81690,0rcu_preempt54-21kswapd010:41:520
81690,0rcu_preempt54-21kswapd009:12:350
81690,0rcu_preempt19-21ksoftirqd/108:58:171
81690,0rcu_preempt19-21ksoftirqd/107:48:591
81680,0rcu_preempt19-21ksoftirqd/109:03:571
81680,0rcu_preempt19-21ksoftirqd/108:33:591
10050680,0irq/346-484840015962-1kworker/0:3H11:40:420
81660,0rcu_preempt3-21ksoftirqd/012:34:040
81650,0rcu_preempt3-21ksoftirqd/012:00:390
81650,0rcu_preempt19-21ksoftirqd/108:49:381
81610,0rcu_preempt54-21kswapd010:35:080
81610,0rcu_preempt54-21kswapd010:35:080
10050610,0irq/346-484840014686-1kworker/0:1H10:13:580
81590,0rcu_preempt3-21ksoftirqd/011:35:210
10050590,0irq/346-48484009766-1kworker/0:3H10:02:360
10050590,0irq/346-484840054-21kswapd012:22:220
10050590,0irq/346-484840054-21kswapd011:53:550
9950570,0irq/345-48484000-21swapper/009:49:470
81570,0rcu_preempt3-21ksoftirqd/011:21:030
4350560,0irq/32-4330000022747-21ssh10:08:530
10050560,0irq/346-484840023694-1kworker/0:1H11:15:380
81550,0rcu_preempt3-21ksoftirqd/010:52:030
10050550,0irq/346-484840054-21kswapd010:03:500
81540,0rcu_preempt19-21ksoftirqd/108:44:021
81540,0rcu_preempt19-21ksoftirqd/108:44:021
1599540,0migration/031611-21diskmemload11:23:520
10050540,0irq/346-4848400851-21rngd11:47:490
10050540,0irq/346-4848400851-21rngd09:44:180
10050520,0irq/346-4848400851-21rngd09:36:560
10050520,0irq/346-484840031507-1kworker/0:2H10:59:400
10050510,0irq/346-484840054-21kswapd010:33:240
10050510,0irq/346-484840027460-21ssh10:46:260
10050510,0irq/346-4848400255262sleep012:23:430
10050500,0irq/346-484840054-21kswapd012:10:440
10050500,0irq/346-484840054-21kswapd009:32:490
10050500,0irq/346-48484005024-21ssh10:23:520
10050500,0irq/346-48484005024-21ssh10:23:520
10050500,0irq/346-484840010613-21munin-node0
10050500,0irq/346-48484000-21swapper/009:56:440
10050500,0irq/346-48484000-21swapper/009:56:440
10050490,0irq/346-484840054-21kswapd011:13:020
10050490,0irq/346-484840054-21kswapd011:13:020
81480,0rcu_preempt19494-21apt-get07:03:500
81480,0rcu_preempt19-21ksoftirqd/107:04:031
10050480,0irq/346-484840054-21kswapd011:29:250
10050480,0irq/346-484840054-21kswapd011:04:450
10050480,0irq/346-484840054-21kswapd010:20:310
10050480,0irq/346-484840054-21kswapd009:15:060
10050480,0irq/346-48484004668-21ping08:29:070
10050470,0irq/346-48484000-21swapper/012:32:440
10050460,0irq/346-48484000-21swapper/009:38:420
10050460,0irq/346-48484000-21swapper/009:21:120
10050450,0irq/346-48484003-21ksoftirqd/007:20:410
10050450,0irq/346-48484000-21swapper/011:49:230
10050440,0irq/346-484840054-21kswapd012:07:340
10050430,0irq/346-48484004668-21ping08:23:560
10050430,0irq/346-48484003486-21munin-node0
10050430,0irq/346-484840031000-21dropbear07:38:490
10050430,0irq/346-484840026704-21df09:03:550
10050430,0irq/346-484840021564-21munin-node0
10050430,0irq/346-48484000-21swapper/012:16:490
9950420,0irq/345-484840024277-21ping07:44:040
81420,0rcu_preempt3-21ksoftirqd/010:54:080
10050410,0irq/346-48484005114-21sed07:58:400
10050410,0irq/346-48484002334-21munin-node0
10050410,0irq/346-484840019509-1kworker/0:2H08:43:560
10050410,0irq/346-484840019509-1kworker/0:2H08:43:560
10050410,0irq/346-484840012928-1kworker/0:1H08:38:500
2099499402,0cyclictest0-21swapper/007:29:140
9950390,0irq/345-48484000-21swapper/008:09:050
81390,0rcu_preempt3-21ksoftirqd/007:13:580
10050390,0irq/346-484840025666-21switchtime08:59:020
20994993816,0cyclictest11540-21latency_hist08:18:390
111380,0rcuc/054-21kswapd008:04:000
232512370,0chrt22793-1kworker/0:0H08:53:520
2099499372,0cyclictest0-21swapper/007:34:120
2099499364,0cyclictest4668-21ping08:18:540
81350,0rcu_preempt3-21ksoftirqd/008:33:510
81350,0rcu_preempt3-21ksoftirqd/007:24:070
81350,0rcu_preempt10235-21kworker/0:207:09:020
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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