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2026-04-11 - 00:35

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 Fri Apr 10, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811040,0rcu_preempt19-21ksoftirqd/111:58:551
81860,0rcu_preempt3-21ksoftirqd/012:18:570
10050820,0irq/346-484840054-21kswapd009:36:400
81800,0rcu_preempt3-21ksoftirqd/007:29:030
81770,0rcu_preempt12767-21kworker/0:010:41:000
81770,0rcu_preempt12767-21kworker/0:010:41:000
81770,0rcu_preempt12767-21kworker/0:010:25:120
10050770,0irq/346-484840054-21kswapd011:57:050
10050760,0irq/346-484840054-21kswapd011:48:550
10050740,0irq/346-484840025091-1kworker/0:1H10:52:110
81730,0rcu_preempt3-21ksoftirqd/012:28:500
81730,0rcu_preempt3-21ksoftirqd/010:57:050
81730,0rcu_preempt15999-21apt-get07:13:450
81730,0rcu_preempt15999-21apt-get07:13:450
10050730,0irq/346-48484007505-1kworker/0:1H11:08:310
81720,0rcu_preempt7785-21kworker/0:108:38:360
10050720,0irq/346-484840017374-1kworker/0:1H11:17:590
10050720,0irq/346-484840014604-1kworker/0:1H11:47:050
10050720,0irq/346-48484001060-1kworker/0:3H09:21:080
81710,0rcu_preempt7785-21kworker/0:109:33:040
10050710,0irq/346-4848400315-1kworker/0:0H10:30:190
81700,0rcu_preempt8656-21kworker/0:209:46:360
81700,0rcu_preempt5409-21kworker/0:210:01:240
81700,0rcu_preempt3-21ksoftirqd/011:09:440
81700,0rcu_preempt3-21ksoftirqd/009:42:090
81700,0rcu_preempt30436-21ping08:13:010
81700,0rcu_preempt19-21ksoftirqd/109:20:511
81700,0rcu_preempt12767-21kworker/0:010:08:200
81680,0rcu_preempt3-21ksoftirqd/012:03:570
81680,0rcu_preempt3-21ksoftirqd/009:51:030
10050680,0irq/346-48484006859-1kworker/0:0H12:14:310
10050680,0irq/346-48484006859-1kworker/0:0H12:14:310
81670,0rcu_preempt3-21ksoftirqd/010:20:510
81670,0rcu_preempt3-21ksoftirqd/007:58:510
81670,0rcu_preempt0-21swapper/007:08:480
81660,0rcu_preempt3-21ksoftirqd/007:53:120
81660,0rcu_preempt3-21ksoftirqd/007:53:120
81660,0rcu_preempt3-21ksoftirqd/007:38:490
81660,0rcu_preempt30436-21ping08:13:500
81660,0rcu_preempt28021-21kworker/0:012:34:490
81660,0rcu_preempt12767-21kworker/0:010:11:000
81660,0rcu_preempt12767-21kworker/0:010:11:000
81660,0rcu_preempt11865-21kworker/0:111:28:490
81650,0rcu_preempt3-21ksoftirqd/011:18:490
81650,0rcu_preempt3-21ksoftirqd/010:58:580
81650,0rcu_preempt0-21swapper/010:14:550
81640,0rcu_preempt3-21ksoftirqd/012:12:480
81640,0rcu_preempt3-21ksoftirqd/012:03:320
81640,0rcu_preempt0-21swapper/011:26:470
81640,0rcu_preempt0-21swapper/009:10:020
81630,0rcu_preempt9273-21kworker/0:211:42:010
81630,0rcu_preempt4542-21meminfo09:23:570
81630,0rcu_preempt3-21ksoftirqd/009:57:190
81630,0rcu_preempt3-21ksoftirqd/009:14:500
81630,0rcu_preempt0-21swapper/011:35:180
81620,0rcu_preempt3-21ksoftirqd/012:26:010
81620,0rcu_preempt3-21ksoftirqd/010:43:500
81620,0rcu_preempt3-21ksoftirqd/008:58:470
81620,0rcu_preempt3-21ksoftirqd/008:03:560
81620,0rcu_preempt19-21ksoftirqd/109:48:421
81610,0rcu_preempt3-21ksoftirqd/010:36:090
81610,0rcu_preempt3-21ksoftirqd/009:03:530
81610,0rcu_preempt3-21ksoftirqd/008:48:470
81610,0rcu_preempt3-21ksoftirqd/008:33:570
81610,0rcu_preempt3-21ksoftirqd/008:28:490
81600,0rcu_preempt3-21ksoftirqd/008:43:540
81600,0rcu_preempt19-21ksoftirqd/112:33:351
81600,0rcu_preempt0-21swapper/007:53:580
81590,0rcu_preempt3-21ksoftirqd/008:53:520
81590,0rcu_preempt3-21ksoftirqd/008:23:570
81570,0rcu_preempt3-21ksoftirqd/007:45:240
81560,0rcu_preempt3-21ksoftirqd/008:20:020
9950550,0irq/345-4848400851-21rngd10:34:261
81540,0rcu_preempt3-21ksoftirqd/007:38:270
81540,0rcu_preempt12704-21apt-get07:03:450
10050540,0irq/346-484840054-21kswapd012:30:461
10050540,0irq/346-484840054-21kswapd011:53:341
81520,0rcu_preempt3-21ksoftirqd/007:24:030
81520,0rcu_preempt17663-21munin-node0
9950500,0irq/345-484840027834-1kworker/1:2H10:22:271
81500,0rcu_preempt32300-21grep08:03:351
10050490,0irq/346-48484008063-21ls08:28:341
10050490,0irq/346-484840012428-1kworker/1:0H11:12:001
81470,0rcu_preempt19-21ksoftirqd/111:23:551
81470,0rcu_preempt19-21ksoftirqd/107:03:581
81460,0rcu_preempt19-21ksoftirqd/109:58:531
10050450,0irq/346-484840017499-21ping07:38:431
10050440,0irq/346-4848400851-21rngd10:53:341
9950430,0irq/345-48484000-21swapper/110:53:511
81430,0rcu_preempt54-21kswapd011:44:221
81430,0rcu_preempt540-21if_can010:58:521
81430,0rcu_preempt19-21ksoftirqd/112:20:481
10050430,0irq/346-48484006858-1kworker/1:0H12:23:551
81410,0rcu_preempt19-21ksoftirqd/111:33:461
81410,0rcu_preempt19-21ksoftirqd/111:13:571
10050410,0irq/346-4848400851-21rngd10:28:391
10050410,0irq/346-484840017372-1kworker/1:2H11:18:451
10050400,0irq/346-484840054-21kswapd010:12:521
10050400,0irq/346-484840054-21kswapd010:12:521
10050400,0irq/346-484840021587-21ssh10:14:001
10050400,0irq/346-484840019-21ksoftirqd/108:08:591
10050400,0irq/346-484840014210-21cyclictest09:35:371
81390,0rcu_preempt19-21ksoftirqd/110:08:351
10050390,0irq/346-484840054-21kswapd009:29:151
10050390,0irq/346-484840032633-21ntp_states12:03:581
10050390,0irq/346-484840029743-21apt-get11:28:441
10050390,0irq/346-484840027084-21munin-node1
10050390,0irq/346-484840025282-21ssh09:12:271
10050390,0irq/346-48484002144-21munin-node1
10050390,0irq/346-484840019565-21switchtime09:39:011
10050380,0irq/346-48484007584-21ssh11:38:511
10050380,0irq/346-48484003977-21wget09:23:481
10050380,0irq/346-484840023758-21ssh09:43:491
10050380,0irq/346-484840014595-21ssh10:39:401
10050380,0irq/346-484840014595-21ssh10:39:401
9950370,0irq/345-484840015208-1kworker/1:0H10:43:461
10050370,0irq/346-484840024456-1kworker/1:2H11:58:041
10050370,0irq/346-484840012689-21ssh12:16:571
10050370,0irq/346-484840012689-21ssh12:16:571
81360,0rcu_preempt612-21ntpq08:03:591
10050360,0irq/346-484840032137-21ssh10:24:351
10050360,0irq/346-484840020143-1kworker/1:2H11:03:521
10050360,0irq/346-484840014611-21munin-node1
10050360,0irq/346-48484000-21swapper/112:09:041
10050350,0irq/346-484840014210-21cyclictest07:34:091
10050350,0irq/346-48484000-21swapper/108:48:411
9950340,0irq/345-48484000-21swapper/108:18:361
81340,0rcu_preempt19-21ksoftirqd/108:38:361
1699340,0migration/13932-21ntp_kernel_pll_08:14:011
81330,0rcu_preempt19-21ksoftirqd/107:18:561
10050330,0irq/346-484840016725-21munin-node1
10050330,0irq/346-484840016725-21munin-node1
10050330,0irq/346-48484000-21swapper/107:23:481
10050320,0irq/346-484840013724-21meminfo08:43:561
81310,0rcu_preempt19-21ksoftirqd/107:28:481
10050310,0irq/346-48484009700-21munin-plugin-st08:33:341
10050310,0irq/346-484840019665-21ls09:03:361
10050310,0irq/346-48484000-21swapper/107:58:291
10050310,0irq/346-48484000-21swapper/107:53:271
10050310,0irq/346-48484000-21swapper/107:53:271
9950300,0irq/345-484840017580-21taskset08:55:031
9950300,0irq/345-48484000-21swapper/107:43:571
10050290,0irq/346-484840011341-21munin-run08:38:351
10050290,0irq/346-48484000-21swapper/108:58:561
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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