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2026-06-05 - 20:33

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 all highest latencies:
System rackaslot5s.osadl.org (updated Fri Jun 05, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811490,0rcu_preempt3-21ksoftirqd/010:51:590
811240,0rcu_preempt3-21ksoftirqd/012:13:020
811160,0rcu_preempt14744-21diskmemload09:48:050
811080,0rcu_preempt3-21ksoftirqd/010:03:070
811020,0rcu_preempt3-21ksoftirqd/009:38:070
81960,0rcu_preempt3-21ksoftirqd/012:18:090
81930,0rcu_preempt3-21ksoftirqd/010:07:420
81900,0rcu_preempt3-21ksoftirqd/012:33:020
81870,0rcu_preempt5042-21apt-get08:37:520
81860,0rcu_preempt3-21ksoftirqd/010:47:410
81860,0rcu_preempt3-21ksoftirqd/009:33:070
81840,0rcu_preempt8322-21apt-get08:47:510
81840,0rcu_preempt3-21ksoftirqd/009:58:100
81810,0rcu_preempt3-21ksoftirqd/011:28:000
81810,0rcu_preempt3-21ksoftirqd/011:02:540
81810,0rcu_preempt3-21ksoftirqd/007:23:210
81800,0rcu_preempt3-21ksoftirqd/009:55:120
81790,0rcu_preempt14744-21diskmemload11:23:090
81770,0rcu_preempt3-21ksoftirqd/012:03:000
81770,0rcu_preempt3-21ksoftirqd/011:48:060
81770,0rcu_preempt3-21ksoftirqd/009:27:530
81770,0rcu_preempt3-21ksoftirqd/009:08:590
81760,0rcu_preempt4766-21kworker/0:009:22:530
81760,0rcu_preempt4766-21kworker/0:009:22:530
81760,0rcu_preempt3-21ksoftirqd/009:43:010
81760,0rcu_preempt3-21ksoftirqd/009:12:550
81750,0rcu_preempt3-21ksoftirqd/009:18:070
81750,0rcu_preempt3-21ksoftirqd/008:12:540
81750,0rcu_preempt3-21ksoftirqd/008:11:000
81750,0rcu_preempt14744-21diskmemload11:22:410
81740,0rcu_preempt3-21ksoftirqd/012:07:520
81740,0rcu_preempt3-21ksoftirqd/010:27:190
81740,0rcu_preempt3-21ksoftirqd/007:48:040
81740,0rcu_preempt3-21ksoftirqd/007:32:580
81730,0rcu_preempt3-21ksoftirqd/011:07:590
81730,0rcu_preempt3-21ksoftirqd/007:52:560
81730,0rcu_preempt3-21ksoftirqd/007:52:560
81720,0rcu_preempt3-21ksoftirqd/012:23:230
81720,0rcu_preempt3-21ksoftirqd/011:38:070
81720,0rcu_preempt3-21ksoftirqd/010:27:590
81720,0rcu_preempt3-21ksoftirqd/010:15:530
81720,0rcu_preempt3-21ksoftirqd/008:54:450
81710,0rcu_preempt3-21ksoftirqd/010:52:540
81700,0rcu_preempt7322-21ntpq08:43:040
81700,0rcu_preempt3-21ksoftirqd/012:32:250
81700,0rcu_preempt3-21ksoftirqd/008:18:080
81700,0rcu_preempt14677-21df07:27:590
81690,0rcu_preempt3-21ksoftirqd/011:44:570
81680,0rcu_preempt3-21ksoftirqd/008:58:040
81670,0rcu_preempt3-21ksoftirqd/008:00:350
81670,0rcu_preempt3-21ksoftirqd/007:43:110
81670,0rcu_preempt0-21swapper/112:07:501
81660,0rcu_preempt3-21ksoftirqd/010:57:530
81660,0rcu_preempt3-21ksoftirqd/010:57:530
81650,0rcu_preempt3-21ksoftirqd/007:38:120
81650,0rcu_preempt3-21ksoftirqd/007:38:120
81640,0rcu_preempt24501-21grep10:22:410
10050640,0irq/346-484840032007-1kworker/1:1H10:32:551
81630,0rcu_preempt7751-21cyclictest10:33:010
81630,0rcu_preempt3-21ksoftirqd/007:18:020
81630,0rcu_preempt2234-21munin-node0
10050630,0irq/346-484840021974-1kworker/1:2H11:26:291
10050620,0irq/346-484840026930-1kworker/1:1H11:30:241
10050620,0irq/346-484840024297-1kworker/1:0H12:00:131
10050620,0irq/346-484840020923-1kworker/1:1H12:32:401
10050610,0irq/346-484840017095-1kworker/1:0H10:16:021
9950600,0irq/345-48484008629-1kworker/1:3H11:47:311
10050600,0irq/346-484840054-21kswapd009:25:511
10050600,0irq/346-484840054-21kswapd009:25:511
81590,0rcu_preempt19-21ksoftirqd/109:53:101
10050590,0irq/346-48484009588-1kworker/1:2H10:40:381
10050590,0irq/346-484840054-21kswapd011:53:391
81580,0rcu_preempt3-21ksoftirqd/011:32:550
81580,0rcu_preempt3-21ksoftirqd/011:16:240
10050580,0irq/346-484840054-21kswapd009:33:481
10050580,0irq/346-484840019683-1kworker/1:1H09:47:451
10050580,0irq/346-48484001796-1kworker/1:2H12:18:341
10050580,0irq/346-484840014563-1kworker/1:0H10:48:151
81570,0rcu_preempt3-21ksoftirqd/011:58:050
81570,0rcu_preempt3-21ksoftirqd/008:03:080
10050570,0irq/346-484840024499-1kworker/1:1H10:57:001
81560,0rcu_preempt3-21ksoftirqd/010:37:520
10050560,0irq/346-484840017095-1kworker/1:0H10:17:521
81550,0rcu_preempt3-21ksoftirqd/008:32:580
81550,0rcu_preempt3-21ksoftirqd/008:23:020
81550,0rcu_preempt19-21ksoftirqd/107:26:231
81550,0rcu_preempt13922-21ntp_states09:03:030
81550,0rcu_preempt13922-21ntp_states09:03:030
10050550,0irq/346-484840054-21kswapd009:58:201
81540,0rcu_preempt3-21ksoftirqd/011:52:550
10050540,0irq/346-484840054-21kswapd009:28:181
10050540,0irq/346-484840024499-1kworker/1:1H10:58:501
10050540,0irq/346-484840024499-1kworker/1:1H10:58:501
10050540,0irq/346-484840017229-1kworker/1:1H09:19:231
10050540,0irq/346-484840017229-1kworker/1:1H09:13:141
10050530,0irq/346-48484009289-21ssh11:12:411
10050530,0irq/346-484840054-21kswapd012:36:201
10050530,0irq/346-484840054-21kswapd010:28:441
10050530,0irq/346-48484002062-1kworker/1:1H11:05:321
10050530,0irq/346-484840014687-1kworker/1:2H09:44:141
81520,0rcu_preempt19-21ksoftirqd/110:43:021
10050520,0irq/346-48484007123-1kworker/1:1H10:07:571
10050520,0irq/346-48484006774-1kworker/1:3H12:16:531
10050520,0irq/346-484840054-21kswapd012:23:071
10050520,0irq/346-484840013580-1kworker/1:0H11:51:411
81510,0rcu_preempt9536-21apt-get07:12:510
10050510,0irq/346-48484006462-21ssh11:42:301
10050510,0irq/346-484840012118-1kworker/1:2H10:27:131
81500,0rcu_preempt12014-1kworker/1:3H11:18:001
10050500,0irq/346-484840054-21kswapd009:12:281
10050500,0irq/346-484840029255-1kworker/1:1H12:06:451
81490,0rcu_preempt19-21ksoftirqd/107:03:001
10050490,0irq/346-484840054-21kswapd011:32:471
10050480,0irq/346-48484006096-21ssh10:03:131
10050470,0irq/346-484840012014-1kworker/1:3H11:15:461
81460,0rcu_preempt3-21ksoftirqd/007:07:410
81450,0rcu_preempt7751-21cyclictest07:08:070
10050450,0irq/346-484840011037-21ping07:37:481
10050450,0irq/346-484840011037-21ping07:37:481
9950440,0irq/345-484840011037-21ping07:45:121
10050430,0irq/346-484840014530-21ssh09:39:181
7753994021,0cyclictest0-21swapper/107:52:521
7753994021,0cyclictest0-21swapper/107:52:521
10050400,0irq/346-484840030383-1kworker/1:3H08:27:401
7753993922,0cyclictest0-21swapper/108:42:521
81380,0rcu_preempt19-21ksoftirqd/108:08:061
7753993823,0cyclictest12666-21vmstat08:58:061
7753993822,0cyclictest1966-21munin-node1
7753993822,0cyclictest0-21swapper/109:02:511
7753993822,0cyclictest0-21swapper/109:02:511
7753993821,0cyclictest0-21swapper/108:47:511
7753993722,0cyclictest31779-21timerwakeupswit08:18:101
7753993722,0cyclictest15526-21who07:28:201
7753993716,0cyclictest0-21swapper/107:10:101
7753993621,0cyclictest0-21swapper/107:47:541
10050360,0irq/346-48484000-21swapper/107:58:031
7753993520,0cyclictest30707-21cron08:17:401
7753993519,0cyclictest0-21swapper/108:02:531
10050350,0irq/346-484840017572-21cron07:37:401
10050350,0irq/346-48484000-21swapper/107:12:561
7753993419,0cyclictest12433-21taskset07:20:081
7753993415,0cyclictest1470-21runrttasks08:52:511
81330,0rcu_preempt19-21ksoftirqd/108:33:021
7753993318,0cyclictest10050irq/346-484840008:37:521
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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