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2026-06-03 - 09:04

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 Wed Jun 03, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81980,0rcu_preempt0-21swapper/100:13:011
81950,0rcu_preempt19-21ksoftirqd/122:49:531
81940,0rcu_preempt19-21ksoftirqd/121:10:201
81940,0rcu_preempt0-21swapper/122:20:431
81910,0rcu_preempt54-21kswapd022:02:251
81900,0rcu_preempt54-21kswapd022:02:491
81880,0rcu_preempt19-21ksoftirqd/100:35:431
81860,0rcu_preempt19-21ksoftirqd/123:20:021
81860,0rcu_preempt19-21ksoftirqd/121:16:511
81860,0rcu_preempt19-21ksoftirqd/100:09:481
81830,0rcu_preempt19-21ksoftirqd/100:18:121
81780,0rcu_preempt54-21kswapd000:29:431
81760,0rcu_preempt19-21ksoftirqd/120:01:371
81760,0rcu_preempt19-21ksoftirqd/119:45:021
81750,0rcu_preempt19-21ksoftirqd/120:02:581
10050750,0irq/346-484840054-21kswapd022:10:280
10050740,0irq/346-484840027339-1kworker/0:1H22:45:470
81720,0rcu_preempt19-21ksoftirqd/120:20:181
10050720,0irq/346-4848400851-21rngd22:05:400
81710,0rcu_preempt20547-21munin-node1
81710,0rcu_preempt19-21ksoftirqd/122:46:421
81710,0rcu_preempt19-21ksoftirqd/120:23:251
10050710,0irq/346-4848400628-1kworker/0:2H00:19:530
10050710,0irq/346-484840022378-1kworker/0:0H22:32:300
81700,0rcu_preempt851-21rngd23:44:521
81700,0rcu_preempt19-21ksoftirqd/120:28:301
81700,0rcu_preempt19-21ksoftirqd/119:31:511
81700,0rcu_preempt1796-21dropbear19:07:561
10050700,0irq/346-48484008391-1kworker/0:2H23:56:250
10050700,0irq/346-48484005097-1kworker/0:1H21:09:050
10050700,0irq/346-48484001302-1kworker/0:1H23:18:130
81690,0rcu_preempt54-21kswapd023:59:541
81690,0rcu_preempt19-21ksoftirqd/123:27:451
81690,0rcu_preempt19-21ksoftirqd/122:29:241
81690,0rcu_preempt19-21ksoftirqd/120:09:221
81680,0rcu_preempt54-21kswapd021:42:001
81680,0rcu_preempt32735-21ssh22:40:421
81680,0rcu_preempt3-21ksoftirqd/019:54:490
81680,0rcu_preempt21035-21kworker/1:221:52:511
81680,0rcu_preempt19-21ksoftirqd/119:53:211
81680,0rcu_preempt0-21swapper/100:05:211
81670,0rcu_preempt7314-21ssh00:26:371
81670,0rcu_preempt31910-21dropbear23:12:561
81670,0rcu_preempt21035-21kworker/1:221:34:581
81670,0rcu_preempt19-21ksoftirqd/122:53:091
81670,0rcu_preempt19-21ksoftirqd/121:03:051
10050670,0irq/346-484840022990-1kworker/0:3H21:26:300
81660,0rcu_preempt54-21kswapd022:10:251
81650,0rcu_preempt19-21ksoftirqd/123:07:551
81650,0rcu_preempt19-21ksoftirqd/121:51:021
81650,0rcu_preempt19-21ksoftirqd/120:53:051
81650,0rcu_preempt14690-21ssh22:22:461
68142650,0sleep09950irq/345-484840019:28:100
10050650,0irq/346-484840010568-1kworker/0:3H00:32:420
81640,0rcu_preempt54-21kswapd023:34:221
81640,0rcu_preempt54-21kswapd023:26:481
81640,0rcu_preempt3-21ksoftirqd/000:33:030
81640,0rcu_preempt21035-21kworker/1:223:40:231
81640,0rcu_preempt19-21ksoftirqd/123:53:421
81640,0rcu_preempt19-21ksoftirqd/119:41:141
81640,0rcu_preempt19-21ksoftirqd/119:20:371
81630,0rcu_preempt54-21kswapd021:30:431
81630,0rcu_preempt19-21ksoftirqd/120:58:071
81630,0rcu_preempt19-21ksoftirqd/120:58:071
10050630,0irq/346-484840013334-1kworker/0:0H00:03:050
81620,0rcu_preempt21035-21kworker/1:222:32:561
81620,0rcu_preempt19-21ksoftirqd/123:03:521
81620,0rcu_preempt19-21ksoftirqd/123:00:411
81620,0rcu_preempt19-21ksoftirqd/122:14:531
81620,0rcu_preempt19-21ksoftirqd/122:14:531
81620,0rcu_preempt19-21ksoftirqd/120:43:591
81620,0rcu_preempt0-21swapper/121:21:551
81610,0rcu_preempt3-21ksoftirqd/023:08:350
81610,0rcu_preempt3-21ksoftirqd/000:08:380
81610,0rcu_preempt19-21ksoftirqd/123:51:521
81610,0rcu_preempt19-21ksoftirqd/123:51:521
81610,0rcu_preempt19-21ksoftirqd/121:43:221
81610,0rcu_preempt19-21ksoftirqd/121:23:591
81600,0rcu_preempt54-21kswapd021:56:180
81600,0rcu_preempt54-21kswapd021:37:560
81600,0rcu_preempt3-21ksoftirqd/000:17:060
81590,0rcu_preempt19-21ksoftirqd/120:41:001
81590,0rcu_preempt0-21swapper/119:16:531
81580,0rcu_preempt3-21ksoftirqd/022:20:560
81580,0rcu_preempt19-21ksoftirqd/120:48:071
81570,0rcu_preempt3-21ksoftirqd/023:32:590
81560,0rcu_preempt19-21ksoftirqd/120:33:121
81560,0rcu_preempt19-21ksoftirqd/119:36:341
81560,0rcu_preempt1113-21runrttasks19:04:261
10050560,0irq/346-484840016122-1kworker/0:0H23:29:230
81540,0rcu_preempt3-21ksoftirqd/022:37:590
81540,0rcu_preempt19-21ksoftirqd/119:48:011
81510,0rcu_preempt3-21ksoftirqd/020:27:550
81510,0rcu_preempt3-21ksoftirqd/000:23:050
4350510,0irq/32-433000005164-21ssh22:12:590
4350510,0irq/32-433000005164-21ssh22:12:590
10050510,0irq/346-4848400851-21rngd21:22:180
10050510,0irq/346-484840054-21kswapd022:52:430
10050510,0irq/346-484840032566-21ssh19:02:580
81500,0rcu_preempt3-21ksoftirqd/021:48:070
81500,0rcu_preempt3-21ksoftirqd/021:42:540
10050500,0irq/346-484840054-21kswapd020:38:030
81490,0rcu_preempt19-21ksoftirqd/119:25:021
10050490,0irq/346-48484000-21swapper/022:25:290
10050480,0irq/346-484840054-21kswapd023:14:090
10050480,0irq/346-484840022939-21cat23:03:140
81470,0rcu_preempt3-21ksoftirqd/023:24:490
81470,0rcu_preempt3-21ksoftirqd/020:13:020
10050470,0irq/346-484840054-21kswapd022:34:280
10050470,0irq/346-484840025187-1kworker/0:1H23:42:320
10050470,0irq/346-48484000-21swapper/022:01:550
81460,0rcu_preempt3-21ksoftirqd/020:23:010
10050460,0irq/346-484840019354-1kworker/0:2H23:48:290
10050460,0irq/346-484840019354-1kworker/0:2H23:48:290
10050460,0irq/346-48484000-21swapper/022:48:120
10050450,0irq/346-484840054-21kswapd000:02:120
10050450,0irq/346-48484000-21swapper/022:58:350
9950440,0irq/345-48484000-21swapper/023:44:300
81440,0rcu_preempt3887-21munin-node0
81440,0rcu_preempt1339-21snmpd20:02:580
10050440,0irq/346-48484001460-21cyclictest21:15:540
9950430,0irq/345-484840022990-1kworker/0:3H21:29:460
81430,0rcu_preempt3-21ksoftirqd/020:48:030
196742430,0chrt19418-1kworker/0:3H20:12:280
81420,0rcu_preempt5375-21diskmemload21:32:590
81420,0rcu_preempt3-21ksoftirqd/019:57:540
81410,0rcu_preempt3-21ksoftirqd/020:43:040
81410,0rcu_preempt20652-21kworker/0:120:18:130
1461994111,0cyclictest0-21swapper/019:22:450
9950400,0irq/345-484840012280-21munin-node0
81400,0rcu_preempt3-21ksoftirqd/019:07:560
1599400,0migration/026503-21munin-node0
1461994013,0cyclictest0-21swapper/019:42:450
146199392,0cyclictest3715-21ping19:38:080
81380,0rcu_preempt3-21ksoftirqd/019:37:440
81370,0rcu_preempt3-21ksoftirqd/021:00:450
81370,0rcu_preempt3-21ksoftirqd/021:00:450
81370,0rcu_preempt3-21ksoftirqd/019:17:430
81360,0rcu_preempt3-21ksoftirqd/020:52:540
146199362,0cyclictest0-21swapper/019:26:120
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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