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2026-01-01 - 08:58

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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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 Thu Jan 01, 2026 00:43:34)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811340,0rcu_preempt3-21ksoftirqd/000:16:580
811330,0rcu_preempt3-21ksoftirqd/000:23:200
811330,0rcu_preempt3-21ksoftirqd/000:23:200
811320,0rcu_preempt3-21ksoftirqd/022:31:200
811310,0rcu_preempt3-21ksoftirqd/022:13:050
811310,0rcu_preempt3-21ksoftirqd/021:23:530
811300,0rcu_preempt3-21ksoftirqd/000:00:450
811290,0rcu_preempt3-21ksoftirqd/023:36:010
811290,0rcu_preempt3-21ksoftirqd/023:36:010
811290,0rcu_preempt3-21ksoftirqd/023:15:260
811290,0rcu_preempt3-21ksoftirqd/000:32:250
811280,0rcu_preempt811-21rngd20:10:260
811280,0rcu_preempt3-21ksoftirqd/023:09:040
811280,0rcu_preempt3-21ksoftirqd/023:09:040
811280,0rcu_preempt3-21ksoftirqd/022:21:190
811280,0rcu_preempt3-21ksoftirqd/021:40:230
811270,0rcu_preempt54-21kswapd000:09:570
811270,0rcu_preempt3-21ksoftirqd/023:01:070
811250,0rcu_preempt3-21ksoftirqd/023:47:380
811250,0rcu_preempt22928-1kworker/0:0H23:54:270
811240,0rcu_preempt3-21ksoftirqd/021:34:320
811230,0rcu_preempt3-21ksoftirqd/000:35:250
811230,0rcu_preempt3-21ksoftirqd/000:35:250
811170,0rcu_preempt3-21ksoftirqd/023:59:480
811150,0rcu_preempt3-21ksoftirqd/022:37:560
811140,0rcu_preempt811-21rngd22:07:040
811120,0rcu_preempt54-21kswapd023:43:290
811120,0rcu_preempt54-21kswapd021:50:210
811120,0rcu_preempt3-21ksoftirqd/023:21:290
811120,0rcu_preempt3-21ksoftirqd/021:56:130
811110,0rcu_preempt3-21ksoftirqd/022:00:160
811110,0rcu_preempt3-21ksoftirqd/021:00:210
811090,0rcu_preempt3-21ksoftirqd/022:40:230
811090,0rcu_preempt3-21ksoftirqd/022:40:230
811080,0rcu_preempt24073-21kworker/0:121:35:560
811060,0rcu_preempt3-21ksoftirqd/019:35:250
811060,0rcu_preempt3-21ksoftirqd/019:35:250
811050,0rcu_preempt54-21kswapd023:25:420
811050,0rcu_preempt3-21ksoftirqd/019:50:120
811050,0rcu_preempt3-21ksoftirqd/019:50:120
811040,0rcu_preempt3-21ksoftirqd/022:47:450
811030,0rcu_preempt3-21ksoftirqd/022:58:230
811020,0rcu_preempt3-21ksoftirqd/000:26:020
811010,0rcu_preempt3-21ksoftirqd/021:11:520
811000,0rcu_preempt3-21ksoftirqd/023:11:540
811000,0rcu_preempt3-21ksoftirqd/020:55:160
81990,0rcu_preempt3-21ksoftirqd/020:00:050
81960,0rcu_preempt3-21ksoftirqd/023:33:150
81860,0rcu_preempt3-21ksoftirqd/022:19:080
81850,0rcu_preempt3-21ksoftirqd/022:53:000
81820,0rcu_preempt3-21ksoftirqd/020:06:220
81800,0rcu_preempt3-21ksoftirqd/020:17:030
81790,0rcu_preempt3-21ksoftirqd/022:27:350
81780,0rcu_preempt16285-21ping20:20:270
81770,0rcu_preempt25884-21kworker/0:021:15:160
81760,0rcu_preempt32484-21cyclictest22:10:521
81760,0rcu_preempt32484-21cyclictest00:35:401
81760,0rcu_preempt32484-21cyclictest00:35:401
81760,0rcu_preempt2319-21ssh00:06:110
81760,0rcu_preempt1308-21lldpd20:44:540
81760,0rcu_preempt1308-21lldpd20:44:540
81740,0rcu_preempt3-21ksoftirqd/021:45:550
81740,0rcu_preempt3-21ksoftirqd/021:29:520
81740,0rcu_preempt19-21ksoftirqd/122:35:341
81730,0rcu_preempt3-21ksoftirqd/020:50:050
81730,0rcu_preempt3-21ksoftirqd/019:15:310
81730,0rcu_preempt3-21ksoftirqd/019:15:310
81730,0rcu_preempt2631-21kworker/0:219:45:240
81720,0rcu_preempt3-21ksoftirqd/019:20:110
81710,0rcu_preempt3-21ksoftirqd/020:25:340
81710,0rcu_preempt2631-21kworker/0:219:40:000
81700,0rcu_preempt3-21ksoftirqd/020:40:080
81700,0rcu_preempt3-21ksoftirqd/019:30:210
81700,0rcu_preempt19-21ksoftirqd/100:15:131
81690,0rcu_preempt27577-1kworker/0:1H20:35:060
10050690,0irq/346-484840019478-1kworker/1:1H23:16:501
81680,0rcu_preempt3-21ksoftirqd/021:05:040
81680,0rcu_preempt3-21ksoftirqd/021:05:040
81680,0rcu_preempt3-21ksoftirqd/019:55:200
10050680,0irq/346-4848400181ktimersoftd/122:25:011
9950670,0irq/345-484840019-21ksoftirqd/123:25:181
81670,0rcu_preempt3-21ksoftirqd/019:25:160
81660,0rcu_preempt3-21ksoftirqd/020:33:510
10050660,0irq/346-48484009200-1kworker/1:1H21:20:251
81650,0rcu_preempt3-21ksoftirqd/019:13:240
9950620,0irq/345-4848400181ktimersoftd/123:41:361
10050620,0irq/346-484840081rcu_preempt21:35:191
10050600,0irq/346-48484000-21swapper/121:55:051
9950580,0irq/345-4848400181ktimersoftd/123:04:201
10050580,0irq/346-484840081rcu_preempt22:01:391
9950570,0irq/345-484840081rcu_preempt00:10:021
9950560,0irq/345-4848400181ktimersoftd/123:05:151
9950560,0irq/345-4848400181ktimersoftd/123:05:151
9950560,0irq/345-4848400181ktimersoftd/100:25:211
9950560,0irq/345-4848400181ktimersoftd/100:00:511
10050550,0irq/346-4848400171rcuc/100:20:181
10050550,0irq/346-4848400171rcuc/100:20:181
9950540,0irq/345-48484003248699cyclictest00:30:341
9950540,0irq/345-4848400181ktimersoftd/123:12:161
9950540,0irq/345-48484000-21swapper/121:40:121
10050540,0irq/346-484840054-21kswapd023:50:241
10050540,0irq/346-484840054-21kswapd020:20:121
10050540,0irq/346-484840028457-1kworker/1:2H23:30:171
9950530,0irq/345-4848400181ktimersoftd/122:42:021
9950530,0irq/345-4848400181ktimersoftd/122:42:021
9950530,0irq/345-4848400181ktimersoftd/121:31:191
9950530,0irq/345-4848400171rcuc/121:54:501
9950520,0irq/345-4848400171rcuc/122:07:201
10050520,0irq/346-4848400171rcuc/122:23:581
10050520,0irq/346-48484000-21swapper/123:49:411
9950510,0irq/345-48484000-21swapper/120:16:211
81510,0rcu_preempt19-21ksoftirqd/123:59:531
10050510,0irq/346-48484000-21swapper/122:54:031
9950500,0irq/345-4848400171rcuc/123:37:031
9950500,0irq/345-4848400171rcuc/123:37:031
9950500,0irq/345-4848400171rcuc/122:31:091
9950490,0irq/345-4848400171rcuc/123:20:201
9950490,0irq/345-4848400171rcuc/119:39:561
10050490,0irq/346-48484006931-1kworker/1:0H21:11:111
10050490,0irq/346-48484006248-21fschecks_count21:45:101
10050490,0irq/346-48484000-21swapper/121:17:391
9950480,0irq/345-4848400171rcuc/121:26:281
10050470,0irq/346-484840011207-1kworker/1:3H19:45:091
10050470,0irq/346-48484000-21swapper/122:48:421
10050440,0irq/346-484840023858-1kworker/1:1H22:19:521
81420,0rcu_preempt3-21ksoftirqd/019:05:180
81420,0rcu_preempt3-21ksoftirqd/019:05:180
10050420,0irq/346-48484003350-21ping19:37:021
10050420,0irq/346-48484003350-21ping19:37:021
10050420,0irq/346-484840019-21ksoftirqd/120:05:161
10050420,0irq/346-48484000-21swapper/119:55:071
10050410,0irq/346-48484008014-21munin-run22:59:521
81400,0rcu_preempt19-21ksoftirqd/119:09:511
81400,0rcu_preempt19-21ksoftirqd/119:09:511
9950380,0irq/345-48484000-21swapper/120:10:231
10050380,0irq/346-48484000-21swapper/121:00:101
10050380,0irq/346-48484000-21swapper/119:19:521
10050380,0irq/346-48484000-21swapper/119:19:521
10050380,0irq/346-48484000-21swapper/100:05:491
10050370,0irq/346-484840016597-21munin-node1
81360,0rcu_preempt19-21ksoftirqd/119:30:551
81360,0rcu_preempt19-21ksoftirqd/119:25:291
9950350,0irq/345-484840054-21kswapd020:25:111
9950340,0irq/345-484840013581-21idleruntime19:50:081
9950340,0irq/345-484840013581-21idleruntime19:50:081
10050340,0irq/346-48484000-21swapper/120:35:121
81330,0rcu_preempt19-21ksoftirqd/121:06:041
81330,0rcu_preempt19-21ksoftirqd/121:06:041
81330,0rcu_preempt19-21ksoftirqd/120:39:581
81330,0rcu_preempt19-21ksoftirqd/119:19:591
81310,0rcu_preempt19-21ksoftirqd/120:54:101
9950300,0irq/345-48484001716-1kworker/1:3H20:55:021
81300,0rcu_preempt19-21ksoftirqd/120:32:091
9950290,0irq/345-48484000-21swapper/120:45:091
9950290,0irq/345-48484000-21swapper/120:45:091
9950270,0irq/345-48484000-21swapper/119:10:201
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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