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2025-11-19 - 16:51

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 100 highest latencies:
System rackaslot5s.osadl.org (updated Wed Nov 19, 2025 12:43:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81960,0rcu_preempt12037-21sshd07:28:200
81960,0rcu_preempt12037-21sshd07:28:200
81920,0rcu_preempt3-21ksoftirqd/011:39:370
81910,0rcu_preempt3-21ksoftirqd/011:50:090
81910,0rcu_preempt3-21ksoftirqd/011:21:520
81900,0rcu_preempt3-21ksoftirqd/012:28:220
81860,0rcu_preempt31173-21kworker/0:212:02:480
81850,0rcu_preempt15247-21kworker/0:007:40:140
81850,0rcu_preempt15247-21kworker/0:007:40:140
81810,0rcu_preempt12813-21kworker/0:012:19:410
81800,0rcu_preempt19-21ksoftirqd/107:19:381
81790,0rcu_preempt3-21ksoftirqd/010:05:060
81770,0rcu_preempt3064-21apt-get12:04:480
81750,0rcu_preempt12539-21diskmemload11:07:131
81740,0rcu_preempt3-21ksoftirqd/009:41:220
81740,0rcu_preempt3-21ksoftirqd/007:59:510
81740,0rcu_preempt0-21swapper/011:27:400
254162740,0sleep010050irq/346-484840008:09:470
81720,0rcu_preempt7434-1kworker/0:1H07:20:080
81720,0rcu_preempt5276-21kworker/0:112:11:020
81720,0rcu_preempt15247-21kworker/0:007:50:060
81710,0rcu_preempt8806-21kworker/0:210:40:560
81700,0rcu_preempt13384-21ssh11:32:200
81690,0rcu_preempt3-21ksoftirqd/008:55:060
81680,0rcu_preempt3-21ksoftirqd/008:39:520
81680,0rcu_preempt16715-1kworker/1:1H07:44:371
81680,0rcu_preempt16715-1kworker/1:1H07:44:371
81680,0rcu_preempt13620-21kworker/0:207:34:590
81680,0rcu_preempt13620-21kworker/0:207:34:590
81680,0rcu_preempt1250-21lldpd09:09:510
81680,0rcu_preempt1250-21lldpd09:09:510
81680,0rcu_preempt0-21swapper/010:16:280
81670,0rcu_preempt3-21ksoftirqd/011:08:210
81670,0rcu_preempt3-21ksoftirqd/009:31:490
81670,0rcu_preempt3-21ksoftirqd/009:27:050
81670,0rcu_preempt3-21ksoftirqd/009:27:050
81670,0rcu_preempt30132-21kworker/0:008:25:230
81660,0rcu_preempt3-21ksoftirqd/012:18:290
81660,0rcu_preempt3-21ksoftirqd/008:20:050
81660,0rcu_preempt3-21ksoftirqd/008:14:420
81660,0rcu_preempt1362-21dropbear11:14:570
81650,0rcu_preempt3-21ksoftirqd/012:35:070
81650,0rcu_preempt3-21ksoftirqd/010:50:000
81650,0rcu_preempt3-21ksoftirqd/007:59:190
81650,0rcu_preempt3-21ksoftirqd/007:59:190
81640,0rcu_preempt7240-21apt-get09:49:500
81640,0rcu_preempt3-21ksoftirqd/011:40:030
81640,0rcu_preempt3-21ksoftirqd/009:55:110
81640,0rcu_preempt3-21ksoftirqd/009:55:110
81640,0rcu_preempt3-21ksoftirqd/009:35:430
81640,0rcu_preempt25423-21kworker/0:211:02:550
81640,0rcu_preempt13047-21kworker/0:209:16:220
81640,0rcu_preempt0-21swapper/011:12:470
81630,0rcu_preempt3-21ksoftirqd/010:39:200
81630,0rcu_preempt3-21ksoftirqd/010:28:500
81630,0rcu_preempt3-21ksoftirqd/008:29:540
81630,0rcu_preempt0-21swapper/010:31:520
228222630,0chrt10050irq/346-484840010:12:420
81620,0rcu_preempt3-21ksoftirqd/011:45:040
81620,0rcu_preempt3-21ksoftirqd/009:20:070
81620,0rcu_preempt3-21ksoftirqd/008:08:400
81620,0rcu_preempt3-21ksoftirqd/007:15:230
81620,0rcu_preempt0-21swapper/010:55:450
81620,0rcu_preempt0-21swapper/010:21:110
81610,0rcu_preempt3-21ksoftirqd/012:34:070
81610,0rcu_preempt3-21ksoftirqd/011:57:500
81610,0rcu_preempt3-21ksoftirqd/010:00:070
81610,0rcu_preempt3-21ksoftirqd/010:00:070
81610,0rcu_preempt3-21ksoftirqd/009:44:520
81610,0rcu_preempt3-21ksoftirqd/009:05:070
81610,0rcu_preempt3-21ksoftirqd/008:50:510
81610,0rcu_preempt3-21ksoftirqd/007:09:510
81600,0rcu_preempt3-21ksoftirqd/010:44:500
81600,0rcu_preempt3-21ksoftirqd/009:00:090
81600,0rcu_preempt3-21ksoftirqd/007:30:070
81590,0rcu_preempt3-21ksoftirqd/007:45:100
81590,0rcu_preempt0-21swapper/008:34:580
10050570,0irq/346-484840054-21kswapd012:34:521
81560,0rcu_preempt3-21ksoftirqd/008:45:040
81560,0rcu_preempt1325-21munin-node08:25:011
10050550,0irq/346-484840021309-1kworker/1:1H10:57:121
81540,0rcu_preempt19-21ksoftirqd/107:27:511
81540,0rcu_preempt19-21ksoftirqd/107:27:511
4350540,0irq/32-433000005955-21dropbear07:09:531
9950530,0irq/345-484840030180-1kworker/1:0H11:56:291
10050530,0irq/346-484840054-21kswapd008:19:381
81520,0rcu_preempt19-21ksoftirqd/111:19:381
10050520,0irq/346-484840028220-21ntpdc10:20:051
9950510,0irq/345-484840021266-1kworker/1:0H09:24:041
9950510,0irq/345-484840012959-1kworker/1:1H11:35:531
9950500,0irq/345-484840030180-1kworker/1:0H12:05:401
9950500,0irq/345-484840025661-1kworker/1:1H10:17:581
81500,0rcu_preempt29594-21php-cgi09:34:581
10050500,0irq/346-484840030842-1kworker/1:3H09:39:551
92442490,0sleep19950irq/345-484840009:51:531
9950480,0irq/345-484840031929-1kworker/1:3H11:13:001
236302480,0sleep19950irq/345-484840012:34:091
9950470,0irq/345-484840027860-1kworker/1:1H09:34:281
9950470,0irq/345-484840022186-1kworker/1:0H10:12:551
9950470,0irq/345-48484000-21swapper/111:40:071
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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