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2026-01-09 - 03:40

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 Fri Jan 09, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811480,0rcu_preempt19714-1kworker/0:2H19:20:110
811370,0rcu_preempt3-21ksoftirqd/021:55:280
811270,0rcu_preempt3-21ksoftirqd/021:45:010
811210,0rcu_preempt19-21ksoftirqd/119:30:111
811040,0rcu_preempt3-21ksoftirqd/023:20:180
811010,0rcu_preempt3-21ksoftirqd/022:15:240
81920,0rcu_preempt3-21ksoftirqd/022:20:140
81910,0rcu_preempt851-21rngd00:27:461
81880,0rcu_preempt19-21ksoftirqd/100:31:331
81870,0rcu_preempt3-21ksoftirqd/000:15:210
81860,0rcu_preempt0-21swapper/100:22:481
81840,0rcu_preempt0-21swapper/122:33:511
81820,0rcu_preempt0-21swapper/121:44:231
81810,0rcu_preempt3-21ksoftirqd/023:15:280
81800,0rcu_preempt19-21ksoftirqd/121:53:411
81790,0rcu_preempt3-21ksoftirqd/023:50:150
81790,0rcu_preempt3-21ksoftirqd/022:25:200
81760,0rcu_preempt3-21ksoftirqd/023:00:000
81740,0rcu_preempt19-21ksoftirqd/100:36:111
81730,0rcu_preempt4818-21ping20:04:521
81730,0rcu_preempt30466-21kworker/1:122:07:141
81720,0rcu_preempt19-21ksoftirqd/122:24:261
81720,0rcu_preempt19-21ksoftirqd/119:58:211
81710,0rcu_preempt19-21ksoftirqd/123:54:281
81710,0rcu_preempt19-21ksoftirqd/123:41:121
81710,0rcu_preempt19-21ksoftirqd/123:24:111
81710,0rcu_preempt0-21swapper/123:29:131
81700,0rcu_preempt3-21ksoftirqd/000:30:190
81700,0rcu_preempt19-21ksoftirqd/123:37:371
81700,0rcu_preempt19-21ksoftirqd/120:11:041
81700,0rcu_preempt19-21ksoftirqd/100:12:151
81690,0rcu_preempt3-21ksoftirqd/023:55:270
81690,0rcu_preempt30466-21kworker/1:122:38:241
81690,0rcu_preempt30466-21kworker/1:121:38:161
81690,0rcu_preempt19-21ksoftirqd/120:17:041
81690,0rcu_preempt19-21ksoftirqd/119:21:281
81690,0rcu_preempt0-21swapper/121:11:181
81680,0rcu_preempt31037-21ntp_states22:45:260
81680,0rcu_preempt20993-21cyclictest19:25:231
81680,0rcu_preempt19-21ksoftirqd/123:48:071
81680,0rcu_preempt19-21ksoftirqd/123:19:411
81680,0rcu_preempt19-21ksoftirqd/122:41:411
81680,0rcu_preempt19-21ksoftirqd/122:16:511
81680,0rcu_preempt19-21ksoftirqd/119:45:251
81680,0rcu_preempt0-21swapper/122:54:461
81680,0rcu_preempt0-21swapper/121:49:571
81670,0rcu_preempt30466-21kworker/1:100:04:111
81670,0rcu_preempt21874-21dropbear20:50:181
81670,0rcu_preempt19-21ksoftirqd/123:56:221
81670,0rcu_preempt19-21ksoftirqd/122:49:081
81670,0rcu_preempt19-21ksoftirqd/121:29:481
81670,0rcu_preempt19-21ksoftirqd/120:05:091
81670,0rcu_preempt19-21ksoftirqd/119:40:071
81670,0rcu_preempt19-21ksoftirqd/119:36:471
81660,0rcu_preempt30466-21kworker/1:100:05:221
81660,0rcu_preempt19-21ksoftirqd/123:10:031
81660,0rcu_preempt19-21ksoftirqd/123:08:181
81660,0rcu_preempt0-21swapper/123:31:541
81660,0rcu_preempt0-21swapper/120:38:421
81650,0rcu_preempt19-21ksoftirqd/122:13:301
81650,0rcu_preempt19-21ksoftirqd/121:57:531
81650,0rcu_preempt19-21ksoftirqd/121:15:031
81650,0rcu_preempt19-21ksoftirqd/121:05:131
81640,0rcu_preempt3-21ksoftirqd/000:25:290
81640,0rcu_preempt30466-21kworker/1:120:25:241
81640,0rcu_preempt19-21ksoftirqd/122:02:071
81640,0rcu_preempt19-21ksoftirqd/100:15:291
81640,0rcu_preempt0-21swapper/122:26:561
81630,0rcu_preempt19-21ksoftirqd/123:01:431
81630,0rcu_preempt19-21ksoftirqd/123:01:431
81630,0rcu_preempt19-21ksoftirqd/121:24:121
81630,0rcu_preempt19-21ksoftirqd/120:49:531
81630,0rcu_preempt18747-21ssh21:31:141
81630,0rcu_preempt18747-21ssh21:31:141
81620,0rcu_preempt851-21rngd20:55:151
81620,0rcu_preempt30466-21kworker/1:122:57:101
81620,0rcu_preempt19-21ksoftirqd/120:40:211
81620,0rcu_preempt19-21ksoftirqd/119:52:151
81610,0rcu_preempt3-21ksoftirqd/019:16:110
81610,0rcu_preempt19-21ksoftirqd/119:17:581
81610,0rcu_preempt19-21ksoftirqd/119:10:221
81600,0rcu_preempt3-21ksoftirqd/023:25:320
81600,0rcu_preempt19-21ksoftirqd/121:00:021
81600,0rcu_preempt19-21ksoftirqd/120:20:131
81590,0rcu_preempt3-21ksoftirqd/022:40:020
81570,0rcu_preempt3-21ksoftirqd/023:45:180
81570,0rcu_preempt19-21ksoftirqd/120:30:221
10050540,0irq/346-4848400851-21rngd00:22:570
10050530,0irq/346-484840022232-21munin-node0
10050530,0irq/346-48484000-21swapper/000:15:000
9950510,0irq/345-484840016543-1kworker/0:3H00:38:130
10050510,0irq/346-4848400851-21rngd23:10:330
10050510,0irq/346-48484000-21swapper/021:44:400
10050500,0irq/346-48484006347-21rm21:20:030
9950490,0irq/345-484840023016-21munin-node0
10050490,0irq/346-48484000-21swapper/021:10:210
9950480,0irq/345-484840024291-21ping19:40:110
81480,0rcu_preempt3-21ksoftirqd/019:05:190
81480,0rcu_preempt13436-21apt-get20:25:100
2099499487,0cyclictest3-21ksoftirqd/023:31:110
10050480,0irq/346-4848400851-21rngd21:27:350
10050480,0irq/346-484840012678-1kworker/0:2H00:05:250
10050480,0irq/346-48484000-21swapper/020:10:240
9950470,0irq/345-484840024291-21ping19:45:340
2099499472,0cyclictest0-21swapper/020:45:290
10050470,0irq/346-4848400851-21rngd23:04:010
10050470,0irq/346-4848400851-21rngd23:04:010
10050470,0irq/346-48484005210-21apt-get20:00:110
10050470,0irq/346-484840020895-21sshd23:06:520
10050470,0irq/346-484840018217-21munin-run20:40:010
10050470,0irq/346-484840012678-1kworker/0:2H00:03:030
10050460,0irq/346-484840024291-21ping19:40:000
10050460,0irq/346-48484000-21swapper/022:05:240
10050460,0irq/346-48484000-21swapper/021:53:460
9950450,0irq/345-48484000-21swapper/022:00:180
81450,0rcu_preempt18590-21diskstats20:40:160
10050450,0irq/346-484840041ktimersoftd/021:18:270
10050450,0irq/346-48484000-21swapper/022:10:260
10050440,0irq/346-4848400851-21rngd23:35:010
10050440,0irq/346-484840026590-21munin-node0
10050440,0irq/346-48484000-21swapper/022:33:180
10050440,0irq/346-48484000-21swapper/021:32:360
10050440,0irq/346-48484000-21swapper/021:32:360
81430,0rcu_preempt3-21ksoftirqd/022:50:140
10050430,0irq/346-48484000-21swapper/022:42:340
10050420,0irq/346-484840023309-21munin-node0
10050420,0irq/346-484840022824-21dropbear20:51:310
10050420,0irq/346-48484001976-21runrttasks19:50:130
10050420,0irq/346-48484001024-21nfsv4.0-svc20:00:010
81410,0rcu_preempt3-21ksoftirqd/021:00:140
81410,0rcu_preempt3-21ksoftirqd/020:15:190
79592412,0sleep00-21swapper/020:06:040
10050400,0irq/346-48484000-21swapper/119:05:111
81390,0rcu_preempt3-21ksoftirqd/019:10:160
1599390,0migration/012633-21threads20:20:260
10050390,0irq/346-484840022860-1kworker/0:2H21:05:270
10050390,0irq/346-48484000-21swapper/020:31:340
2099499371,0cyclictest24291-21ping19:30:100
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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