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2025-11-25 - 23:25

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 100 highest latencies:
System rackaslot5s.osadl.org (updated Tue Nov 25, 2025 12:43:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811510,0rcu_preempt3-21ksoftirqd/009:39:210
811480,0rcu_preempt24685-21kworker/0:209:24:510
811460,0rcu_preempt2668-1kworker/0:1H12:35:090
3058621420,0sleep010050irq/346-484840008:12:220
811400,0rcu_preempt13480-1kworker/0:0H09:50:580
811240,0rcu_preempt19-21ksoftirqd/107:19:321
81830,0rcu_preempt3-21ksoftirqd/009:09:430
81810,0rcu_preempt3-21ksoftirqd/009:54:560
81750,0rcu_preempt16417-21diskmemload11:58:260
81730,0rcu_preempt22430-21kworker/1:109:16:521
10050730,0irq/346-4848400171rcuc/108:39:311
81720,0rcu_preempt19-21ksoftirqd/111:40:211
81720,0rcu_preempt19-21ksoftirqd/110:26:391
81710,0rcu_preempt4064-21kworker/1:211:08:341
81700,0rcu_preempt19-21ksoftirqd/111:45:421
81690,0rcu_preempt54-21kswapd011:31:361
81690,0rcu_preempt19-21ksoftirqd/112:33:361
81690,0rcu_preempt19-21ksoftirqd/112:13:031
81690,0rcu_preempt19-21ksoftirqd/112:02:161
81690,0rcu_preempt19-21ksoftirqd/109:35:191
81690,0rcu_preempt0-21swapper/112:26:371
81690,0rcu_preempt0-21swapper/110:37:041
291452690,0sleep010050irq/346-484840008:09:240
10050690,0irq/346-484840017563-1kworker/0:4H10:43:120
81680,0rcu_preempt19-21ksoftirqd/112:22:371
81670,0rcu_preempt19-21ksoftirqd/112:07:521
81670,0rcu_preempt0-21swapper/110:43:321
81650,0rcu_preempt19-21ksoftirqd/109:57:481
81640,0rcu_preempt9519-21cyclictest10:24:230
81640,0rcu_preempt3-21ksoftirqd/011:45:560
81640,0rcu_preempt0-21swapper/111:50:421
81630,0rcu_preempt3-21ksoftirqd/012:03:410
81630,0rcu_preempt19-21ksoftirqd/110:09:431
10050630,0irq/346-48484006406-1kworker/0:2H09:41:320
10050630,0irq/346-48484000-21swapper/009:32:480
81610,0rcu_preempt3-21ksoftirqd/010:35:010
9950600,0irq/345-484840027971-21latency11:39:540
81600,0rcu_preempt8023-21apt-get07:04:440
81600,0rcu_preempt3-21ksoftirqd/010:58:310
81600,0rcu_preempt3-21ksoftirqd/010:00:500
81600,0rcu_preempt19-21ksoftirqd/111:17:181
10050600,0irq/346-484840021546-1kworker/0:2H11:34:540
81590,0rcu_preempt3-21ksoftirqd/008:50:450
81590,0rcu_preempt3-21ksoftirqd/008:39:560
81590,0rcu_preempt19-21ksoftirqd/112:19:091
81590,0rcu_preempt19-21ksoftirqd/110:44:421
10050590,0irq/346-484840017474-1kworker/0:3H10:05:300
10050590,0irq/346-48484000-21swapper/010:16:530
81580,0rcu_preempt3-21ksoftirqd/012:21:560
81580,0rcu_preempt3-21ksoftirqd/011:14:060
81580,0rcu_preempt3-21ksoftirqd/009:18:360
81580,0rcu_preempt3-21ksoftirqd/007:52:450
10050580,0irq/346-4848400171rcuc/111:27:431
10050580,0irq/346-48484000-21swapper/011:29:530
81570,0rcu_preempt3-21ksoftirqd/007:59:330
81570,0rcu_preempt3-21ksoftirqd/007:59:330
81570,0rcu_preempt19-21ksoftirqd/110:30:271
323802570,0sleep010050irq/346-484840008:19:050
10050570,0irq/346-48484006761-1kworker/0:0H11:14:590
10050570,0irq/346-484840020883-1kworker/0:0H10:10:000
81560,0rcu_preempt54-21kswapd007:30:001
81560,0rcu_preempt3-21ksoftirqd/010:45:140
81560,0rcu_preempt19-21ksoftirqd/108:25:021
81560,0rcu_preempt19-21ksoftirqd/107:29:311
30432560,0sleep010050irq/346-484840008:26:460
169072560,0sleep09950irq/345-484840011:25:020
10050560,0irq/346-48484006763-1kworker/0:2H11:20:200
10050560,0irq/346-484840017563-1kworker/0:4H10:49:520
10050560,0irq/346-4848400171rcuc/109:39:461
10050560,0irq/346-484840011145-1kworker/0:0H09:00:030
10050560,0irq/346-48484000-21swapper/012:17:590
81550,0rcu_preempt19-21ksoftirqd/111:09:431
81550,0rcu_preempt19-21ksoftirqd/109:32:261
10050550,0irq/346-48484004581-1kworker/0:3H08:39:310
10050550,0irq/346-48484003833-1kworker/0:1H11:53:350
10050550,0irq/346-48484002673-1kworker/0:0H07:14:520
10050550,0irq/346-4848400181ktimersoftd/110:02:581
10050550,0irq/346-4848400171rcuc/112:34:481
81540,0rcu_preempt19-21ksoftirqd/111:01:551
81540,0rcu_preempt19-21ksoftirqd/108:29:431
10050540,0irq/346-48484006406-1kworker/0:2H09:49:110
10050540,0irq/346-484840021222-1kworker/0:1H11:05:550
10050540,0irq/346-484840021222-1kworker/0:1H11:00:000
10050540,0irq/346-484840020243-21ssh12:13:000
10050540,0irq/346-4848400171rcuc/110:05:211
9950530,0irq/345-484840029383-21apt-get12:24:440
9950530,0irq/345-484840022618-21munin-run07:49:310
10050530,0irq/346-48484009628-21ssh10:30:030
10050530,0irq/346-484840031896-1kworker/0:4H10:27:110
10050530,0irq/346-484840015214-1kworker/0:1H12:07:390
9950520,0irq/345-484840020435-21cat07:40:060
81520,0rcu_preempt3-21ksoftirqd/012:30:020
81520,0rcu_preempt27176-21ping08:19:500
81520,0rcu_preempt27176-21ping08:19:500
10050520,0irq/346-48484003467-21munin-node0
9950510,0irq/345-484840012897-21latency_hist07:19:331
952199519,0cyclictest5700-21runrttasks11:54:341
81510,0rcu_preempt19-21ksoftirqd/108:12:551
81510,0rcu_preempt19-21ksoftirqd/108:08:021
81510,0rcu_preempt10746-21ssh09:47:331
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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