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2026-04-12 - 17:56

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 792 highest latencies:
System rackaslot5s.osadl.org (updated Sun Apr 12, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81910,0rcu_preempt22484-1kworker/0:0H07:33:320
81850,0rcu_preempt3-21ksoftirqd/010:38:480
81840,0rcu_preempt3-21ksoftirqd/011:43:580
81820,0rcu_preempt3-21ksoftirqd/007:48:550
81790,0rcu_preempt3-21ksoftirqd/010:37:540
81790,0rcu_preempt3-21ksoftirqd/010:37:540
81790,0rcu_preempt3-21ksoftirqd/009:18:080
81770,0rcu_preempt3-21ksoftirqd/012:33:480
81770,0rcu_preempt3-21ksoftirqd/012:12:020
81770,0rcu_preempt3-21ksoftirqd/012:12:020
81770,0rcu_preempt3-21ksoftirqd/009:13:120
81760,0rcu_preempt3-21ksoftirqd/010:23:080
81760,0rcu_preempt3-21ksoftirqd/009:22:090
81750,0rcu_preempt3-21ksoftirqd/011:54:590
81750,0rcu_preempt3-21ksoftirqd/011:21:550
81750,0rcu_preempt3-21ksoftirqd/011:01:460
81750,0rcu_preempt3-21ksoftirqd/010:03:570
81740,0rcu_preempt851-21rngd10:32:220
81740,0rcu_preempt3-21ksoftirqd/011:08:570
81740,0rcu_preempt3-21ksoftirqd/009:58:510
81740,0rcu_preempt3-21ksoftirqd/009:58:510
81740,0rcu_preempt3-21ksoftirqd/009:28:530
81740,0rcu_preempt3-21ksoftirqd/007:58:570
81730,0rcu_preempt3-21ksoftirqd/011:13:550
81730,0rcu_preempt3-21ksoftirqd/010:56:350
81730,0rcu_preempt3-21ksoftirqd/009:44:590
81720,0rcu_preempt3-21ksoftirqd/011:24:340
81720,0rcu_preempt3-21ksoftirqd/010:45:180
81720,0rcu_preempt3-21ksoftirqd/009:41:570
81710,0rcu_preempt3-21ksoftirqd/012:25:050
81710,0rcu_preempt3-21ksoftirqd/009:35:560
81710,0rcu_preempt0-21swapper/009:51:110
81710,0rcu_preempt0-21swapper/009:51:110
81700,0rcu_preempt3-21ksoftirqd/009:25:590
91680,0rcu_sched19-21ksoftirqd/110:23:571
81680,0rcu_preempt3-21ksoftirqd/010:13:010
81670,0rcu_preempt3-21ksoftirqd/007:08:320
81670,0rcu_preempt1161-21munin-node0
81660,0rcu_preempt3-21ksoftirqd/009:03:550
81660,0rcu_preempt14721-1kworker/1:0H08:48:591
81650,0rcu_preempt3-21ksoftirqd/007:33:490
81640,0rcu_preempt3-21ksoftirqd/010:14:210
81600,0rcu_preempt19-21ksoftirqd/112:28:581
81600,0rcu_preempt19-21ksoftirqd/109:43:331
81580,0rcu_preempt19-21ksoftirqd/111:59:131
81580,0rcu_preempt19-21ksoftirqd/107:19:021
81570,0rcu_preempt19-21ksoftirqd/108:18:041
10050570,0irq/346-484840032220-1kworker/0:2H11:31:220
81560,0rcu_preempt3-21ksoftirqd/007:23:530
81560,0rcu_preempt19-21ksoftirqd/111:54:251
81550,0rcu_preempt19-21ksoftirqd/111:03:441
10050550,0irq/346-484840054-21kswapd010:04:491
81540,0rcu_preempt3-21ksoftirqd/011:04:040
10050520,0irq/346-484840026816-1kworker/0:2H12:31:440
10050510,0irq/346-48484008508-21sed11:39:000
9950500,0irq/345-48484000-21swapper/012:19:060
81500,0rcu_preempt54-21kswapd010:19:481
81480,0rcu_preempt19-21ksoftirqd/111:13:541
81480,0rcu_preempt19-21ksoftirqd/109:33:221
81480,0rcu_preempt19-21ksoftirqd/108:03:511
81480,0rcu_preempt19-21ksoftirqd/107:59:041
81480,0rcu_preempt19-21ksoftirqd/107:44:001
81480,0rcu_preempt19-21ksoftirqd/107:34:551
10050480,0irq/346-484840026048-1kworker/0:1H07:43:330
10050480,0irq/346-48484000-21swapper/010:28:200
81470,0rcu_preempt54-21kswapd010:11:031
81470,0rcu_preempt19-21ksoftirqd/109:55:331
81470,0rcu_preempt19-21ksoftirqd/108:18:541
81470,0rcu_preempt19-21ksoftirqd/107:33:041
10050470,0irq/346-484840026304-21ssh10:51:460
9950460,0irq/345-484840029503-1kworker/1:2H12:24:501
9950460,0irq/345-484840021564-1kworker/1:1H09:44:091
81460,0rcu_preempt21565-21diskmemload12:06:011
81460,0rcu_preempt19-21ksoftirqd/112:08:431
81460,0rcu_preempt19-21ksoftirqd/112:08:431
81460,0rcu_preempt19-21ksoftirqd/111:48:491
81460,0rcu_preempt19-21ksoftirqd/111:48:491
81460,0rcu_preempt19-21ksoftirqd/109:58:491
81460,0rcu_preempt19-21ksoftirqd/109:58:491
81460,0rcu_preempt19-21ksoftirqd/108:28:561
81460,0rcu_preempt19-21ksoftirqd/108:12:271
81460,0rcu_preempt19-21ksoftirqd/107:23:351
81460,0rcu_preempt19-21ksoftirqd/107:03:571
10050460,0irq/346-484840054-21kswapd008:23:441
10050460,0irq/346-484840011949-1kworker/1:0H12:16:121
81450,0rcu_preempt27817-21timerandwakeup09:14:011
81450,0rcu_preempt19-21ksoftirqd/110:58:331
81450,0rcu_preempt19-21ksoftirqd/110:48:491
81450,0rcu_preempt19-21ksoftirqd/110:39:551
81450,0rcu_preempt19-21ksoftirqd/108:33:481
81450,0rcu_preempt19-21ksoftirqd/107:57:521
81450,0rcu_preempt19-21ksoftirqd/107:39:071
81450,0rcu_preempt15034-21wc08:48:330
81450,0rcu_preempt1060-21runrttasks12:37:431
10050450,0irq/346-484840026386-21sshd07:43:490
10050450,0irq/346-484840022355-1kworker/1:3H11:37:061
81440,0rcu_preempt4680-21rm09:23:531
81440,0rcu_preempt19-21ksoftirqd/111:02:021
81440,0rcu_preempt19-21ksoftirqd/110:47:171
81440,0rcu_preempt19-21ksoftirqd/110:13:531
81440,0rcu_preempt19-21ksoftirqd/108:58:571
81440,0rcu_preempt19-21ksoftirqd/108:43:571
10050440,0irq/346-48484005430-21ssh11:36:100
10050440,0irq/346-484840054-21kswapd010:33:571
10050440,0irq/346-484840054-21kswapd010:33:571
10050440,0irq/346-484840029505-1kworker/0:3H12:01:560
10050440,0irq/346-48484001440-21ssh12:04:320
10050440,0irq/346-48484001272-21runrttasks09:20:031
10050440,0irq/346-48484000-21swapper/012:15:330
81430,0rcu_preempt19-21ksoftirqd/112:18:531
81430,0rcu_preempt19-21ksoftirqd/109:33:571
81430,0rcu_preempt19-21ksoftirqd/108:53:521
10050430,0irq/346-484840022353-1kworker/1:0H11:27:281
10050430,0irq/346-484840018408-21ssh11:48:590
10050430,0irq/346-484840018408-21ssh11:48:590
10050430,0irq/346-484840018308-21idleruntime07:18:530
81420,0rcu_preempt19-21ksoftirqd/111:45:541
81420,0rcu_preempt19-21ksoftirqd/111:40:481
81420,0rcu_preempt19-21ksoftirqd/111:28:541
81420,0rcu_preempt19-21ksoftirqd/111:18:341
81420,0rcu_preempt19-21ksoftirqd/111:08:461
81420,0rcu_preempt19-21ksoftirqd/109:48:531
81420,0rcu_preempt19-21ksoftirqd/109:48:531
81420,0rcu_preempt19-21ksoftirqd/109:08:521
81420,0rcu_preempt19-21ksoftirqd/107:48:491
81420,0rcu_preempt19-21ksoftirqd/107:08:511
81420,0rcu_preempt0-21swapper/008:09:040
1599420,0migration/01471-21taskset08:04:390
10050420,0irq/346-484840016273-1kworker/0:1H08:53:580
81410,0rcu_preempt3-21ksoftirqd/008:38:500
81410,0rcu_preempt19-21ksoftirqd/109:03:341
81410,0rcu_preempt12499-21kworker/1:110:30:571
10050410,0irq/346-48484005556-21wget08:18:520
10050410,0irq/346-484840014713-21munin-node0
1456999402,0cyclictest0-21swapper/008:17:520
10050400,0irq/346-484840030966-21munin-run07:58:330
81390,0rcu_preempt3-21ksoftirqd/008:37:330
163202390,0chrt16273-1kworker/0:1H08:50:190
81380,0rcu_preempt3-21ksoftirqd/008:28:560
81380,0rcu_preempt19-21ksoftirqd/108:38:521
81380,0rcu_preempt19-21ksoftirqd/107:13:381
81380,0rcu_preempt19-21ksoftirqd/107:13:381
10050380,0irq/346-484840018006-1kworker/0:4H08:58:540
10050380,0irq/346-48484000-21swapper/008:23:580
10050380,0irq/346-48484000-21swapper/007:13:540
10050380,0irq/346-48484000-21swapper/007:13:540
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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