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2026-04-30 - 12:47

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 Thu Apr 30, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81930,0rcu_preempt19-21ksoftirqd/123:38:381
81920,0rcu_preempt19-21ksoftirqd/123:51:201
81870,0rcu_preempt19-21ksoftirqd/121:58:331
81770,0rcu_preempt3-21ksoftirqd/023:54:390
81770,0rcu_preempt3-21ksoftirqd/020:10:530
81770,0rcu_preempt12193-21kworker/0:222:13:320
81760,0rcu_preempt3-21ksoftirqd/022:03:380
81750,0rcu_preempt4190-21kworker/0:021:24:340
81750,0rcu_preempt3-21ksoftirqd/022:20:350
81750,0rcu_preempt2124-21kworker/0:121:57:060
81740,0rcu_preempt3-21ksoftirqd/021:14:540
81740,0rcu_preempt3-21ksoftirqd/000:14:380
81740,0rcu_preempt3072-21kworker/0:123:50:530
81740,0rcu_preempt2124-21kworker/0:122:42:340
81740,0rcu_preempt1350-21lldpd00:26:430
81730,0rcu_preempt3-21ksoftirqd/023:31:320
81730,0rcu_preempt3-21ksoftirqd/022:58:340
81730,0rcu_preempt3-21ksoftirqd/021:18:520
81730,0rcu_preempt3072-21kworker/0:123:17:250
81730,0rcu_preempt30240-21kworker/0:100:34:010
81730,0rcu_preempt26023-21ssh23:37:120
81730,0rcu_preempt19678-21diskmemload21:09:410
81730,0rcu_preempt18157-21kworker/0:222:53:200
81720,0rcu_preempt3-21ksoftirqd/000:20:410
81720,0rcu_preempt22693-21ssh00:09:080
81720,0rcu_preempt19678-21diskmemload23:21:000
10050720,0irq/346-484840015247-1kworker/0:1H23:27:460
81710,0rcu_preempt54-21kswapd020:17:410
81710,0rcu_preempt4648-21ssh22:36:150
81710,0rcu_preempt32566-21kworker/0:321:59:290
81710,0rcu_preempt3-21ksoftirqd/022:28:370
81710,0rcu_preempt3-21ksoftirqd/021:03:160
81710,0rcu_preempt3-21ksoftirqd/020:51:490
81710,0rcu_preempt3-21ksoftirqd/020:39:430
81710,0rcu_preempt3-21ksoftirqd/019:58:410
81710,0rcu_preempt3-21ksoftirqd/019:48:200
81710,0rcu_preempt19678-21diskmemload22:18:431
81710,0rcu_preempt19678-21diskmemload21:50:120
81710,0rcu_preempt19678-21diskmemload00:28:310
81710,0rcu_preempt0-21swapper/021:33:350
81700,0rcu_preempt3-21ksoftirqd/022:53:070
81700,0rcu_preempt3-21ksoftirqd/022:26:200
81700,0rcu_preempt3-21ksoftirqd/021:43:430
81700,0rcu_preempt3-21ksoftirqd/020:37:380
81700,0rcu_preempt3-21ksoftirqd/020:05:080
81700,0rcu_preempt3072-21kworker/0:123:45:240
81700,0rcu_preempt28886-21ping20:26:110
81700,0rcu_preempt28886-21ping20:18:400
81700,0rcu_preempt19678-21diskmemload22:09:190
81700,0rcu_preempt19678-21diskmemload21:43:160
81690,0rcu_preempt3-21ksoftirqd/023:40:170
81690,0rcu_preempt3-21ksoftirqd/022:45:190
81690,0rcu_preempt3-21ksoftirqd/021:28:330
81690,0rcu_preempt3-21ksoftirqd/020:56:000
81690,0rcu_preempt3-21ksoftirqd/020:29:040
81690,0rcu_preempt3072-21kworker/0:100:00:190
81690,0rcu_preempt19678-21diskmemload23:06:270
81680,0rcu_preempt3-21ksoftirqd/023:10:570
81680,0rcu_preempt3-21ksoftirqd/021:03:170
81680,0rcu_preempt3-21ksoftirqd/019:34:230
81680,0rcu_preempt3-21ksoftirqd/019:11:080
81680,0rcu_preempt19678-21diskmemload00:06:370
81670,0rcu_preempt3-21ksoftirqd/019:57:360
81670,0rcu_preempt3-21ksoftirqd/019:43:460
81670,0rcu_preempt3-21ksoftirqd/019:13:430
81640,0rcu_preempt3-21ksoftirqd/020:47:320
81640,0rcu_preempt3-21ksoftirqd/019:28:090
81630,0rcu_preempt3-21ksoftirqd/019:32:150
81630,0rcu_preempt3-21ksoftirqd/019:18:500
81630,0rcu_preempt19-21ksoftirqd/121:28:501
10050630,0irq/346-484840054-21kswapd022:38:291
81620,0rcu_preempt3-21ksoftirqd/019:38:400
81590,0rcu_preempt19-21ksoftirqd/100:27:521
81580,0rcu_preempt19-21ksoftirqd/123:56:301
81570,0rcu_preempt19-21ksoftirqd/121:43:441
9950560,0irq/345-4848400851-21rngd00:11:231
81560,0rcu_preempt19-21ksoftirqd/120:15:211
9950550,0irq/345-484840019563-1kworker/1:3H21:43:171
10050550,0irq/346-484840054-21kswapd021:54:531
10050550,0irq/346-484840019-21ksoftirqd/122:51:101
9950540,0irq/345-4848400851-21rngd22:34:431
81540,0rcu_preempt19-21ksoftirqd/121:48:441
81530,0rcu_preempt19-21ksoftirqd/121:18:171
81530,0rcu_preempt19-21ksoftirqd/121:08:431
9950520,0irq/345-4848400851-21rngd00:00:031
9950520,0irq/345-4848400181ktimersoftd/123:30:371
9950520,0irq/345-4848400181ktimersoftd/123:23:491
9950500,0irq/345-4848400181ktimersoftd/122:27:201
10050480,0irq/346-484840014768-1kworker/1:3H22:12:041
10050470,0irq/346-48484003531-1kworker/1:2H00:32:371
10050470,0irq/346-484840030434-1kworker/1:3H20:05:031
10050470,0irq/346-484840017911-1kworker/1:2H23:13:041
10050470,0irq/346-484840011191-21munin-node0
81460,0rcu_preempt851-21rngd21:13:381
9950450,0irq/345-48484005931-1kworker/1:2H22:07:531
9950450,0irq/345-484840019678-21diskmemload21:23:281
81450,0rcu_preempt30742-21ls22:28:401
81450,0rcu_preempt19-21ksoftirqd/119:03:291
10050450,0irq/346-484840022518-21cron19:38:161
10050440,0irq/346-484840054-21kswapd023:21:551
10050440,0irq/346-484840030369-21ssh00:18:341
9950430,0irq/345-484840014268-1kworker/1:1H00:14:421
81430,0rcu_preempt4960-21grep20:23:171
81430,0rcu_preempt19-21ksoftirqd/119:48:421
9950420,0irq/345-484840017911-1kworker/1:2H22:54:281
81420,0rcu_preempt13401-21unixbench_singl21:33:451
81420,0rcu_preempt0-21swapper/120:08:311
10050420,0irq/346-484840014268-1kworker/1:1H00:05:531
10050420,0irq/346-48484000-21swapper/123:14:461
81410,0rcu_preempt26802-1kworker/1:1H23:04:161
10050410,0irq/346-484840024247-21ssh22:58:271
81400,0rcu_preempt5077-21basename20:23:281
9950390,0irq/345-484840024061-1kworker/1:2H23:35:301
81390,0rcu_preempt0-21swapper/120:53:441
1699390,0migration/19992-21aten_rapower_cu20:38:291
10050390,0irq/346-48484000-21swapper/119:28:161
81380,0rcu_preempt19-21ksoftirqd/119:53:261
10050380,0irq/346-484840054-21kswapd022:45:321
10050380,0irq/346-484840032582-21ssh23:44:121
10050370,0irq/346-484840054-21kswapd000:33:171
10050370,0irq/346-484840018267-21ssh22:14:491
10050370,0irq/346-48484000-21swapper/120:28:331
10050360,0irq/346-484840029350-21wget19:58:291
81350,0rcu_preempt0-21swapper/120:58:361
1699340,0migration/115132-21ntp_kernel_pll_19:13:391
9950330,0irq/345-484840015984-21ping19:33:161
10050330,0irq/346-484840015650-1kworker/1:3H19:18:271
10050320,0irq/346-48484000-21swapper/120:48:361
10050320,0irq/346-48484000-21swapper/120:43:401
9950310,0irq/345-484840015984-21ping19:43:271
10050300,0irq/346-48484009527-21sshd20:35:211
1270199299,0cyclictest10050irq/346-484840019:08:261
10050290,0irq/346-484840018779-21meminfo21:03:391
10050270,0irq/346-484840023806-21sshd19:39:211
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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