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2026-06-25 - 08:41

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 Thu Jun 25, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81920,0rcu_preempt3-21ksoftirqd/023:01:530
81900,0rcu_preempt3-21ksoftirqd/022:17:330
81880,0rcu_preempt3-21ksoftirqd/022:12:350
81860,0rcu_preempt3-21ksoftirqd/022:27:380
81820,0rcu_preempt54-21kswapd021:17:300
81820,0rcu_preempt54-21kswapd021:17:300
81820,0rcu_preempt3-21ksoftirqd/023:32:380
81820,0rcu_preempt3-21ksoftirqd/023:24:110
10050810,0irq/346-4848400851-21rngd22:22:380
10050800,0irq/346-484840054-21kswapd000:24:340
81760,0rcu_preempt17678-21latency_hist19:22:230
10050730,0irq/346-484840015555-1kworker/0:2H00:21:320
81720,0rcu_preempt3-21ksoftirqd/023:38:170
10050720,0irq/346-484840014242-1kworker/0:0H21:36:020
81710,0rcu_preempt3-21ksoftirqd/022:07:040
10050710,0irq/346-484840028733-1kworker/0:2H22:56:500
10050710,0irq/346-484840028733-1kworker/0:2H22:56:500
10050700,0irq/346-484840022717-1kworker/0:0H21:24:300
10050700,0irq/346-4848400171rcuc/121:19:081
10050700,0irq/346-4848400171rcuc/121:19:081
81690,0rcu_preempt3-21ksoftirqd/021:28:050
81690,0rcu_preempt3-21ksoftirqd/021:28:050
10050690,0irq/346-4848400801-1kworker/0:0H00:04:440
81680,0rcu_preempt851-21rngd23:15:070
81680,0rcu_preempt3-21ksoftirqd/021:10:220
10050650,0irq/346-48484009301-1kworker/1:0H21:32:491
81640,0rcu_preempt3-21ksoftirqd/022:48:520
81640,0rcu_preempt3-21ksoftirqd/021:57:480
81630,0rcu_preempt3-21ksoftirqd/022:35:170
10050610,0irq/346-4848400851-21rngd22:39:530
10050610,0irq/346-484840054-21kswapd022:02:461
81600,0rcu_preempt18548-1kworker/1:1H23:50:401
10050600,0irq/346-484840025261-1kworker/0:0H00:30:140
81590,0rcu_preempt3-21ksoftirqd/020:22:210
81580,0rcu_preempt3-21ksoftirqd/000:32:450
81570,0rcu_preempt3-21ksoftirqd/019:02:420
81570,0rcu_preempt19-21ksoftirqd/120:01:011
81560,0rcu_preempt3-21ksoftirqd/022:45:250
81560,0rcu_preempt3-21ksoftirqd/022:45:250
81560,0rcu_preempt3-21ksoftirqd/020:07:220
81560,0rcu_preempt19-21ksoftirqd/121:42:321
81560,0rcu_preempt19-21ksoftirqd/120:15:001
81560,0rcu_preempt19-21ksoftirqd/120:15:001
81550,0rcu_preempt19-21ksoftirqd/120:24:581
81550,0rcu_preempt19-21ksoftirqd/120:07:121
81540,0rcu_preempt3-21ksoftirqd/019:27:200
81540,0rcu_preempt19-21ksoftirqd/123:56:421
81540,0rcu_preempt19-21ksoftirqd/121:02:391
81540,0rcu_preempt19-21ksoftirqd/120:21:531
81540,0rcu_preempt19-21ksoftirqd/120:08:111
81540,0rcu_preempt19-21ksoftirqd/119:55:561
10050540,0irq/346-484840054-21kswapd000:10:410
10050540,0irq/346-484840016232-1kworker/0:0H23:17:360
81530,0rcu_preempt3-21ksoftirqd/023:55:000
81530,0rcu_preempt3-21ksoftirqd/019:57:460
10050530,0irq/346-484840054-21kswapd022:29:371
81520,0rcu_preempt19727-21diskmemload23:12:411
10050520,0irq/346-48484006596-1kworker/1:1H22:00:241
10050520,0irq/346-484840054-21kswapd023:00:271
10050520,0irq/346-484840054-21kswapd021:46:130
10050520,0irq/346-484840054-21kswapd021:08:551
81510,0rcu_preempt19-21ksoftirqd/123:57:391
10050510,0irq/346-484840054-21kswapd023:29:211
10050510,0irq/346-484840054-21kswapd021:16:321
10050510,0irq/346-484840054-21kswapd021:16:090
10050510,0irq/346-484840031104-1kworker/0:0H23:47:240
10050510,0irq/346-484840019212-1kworker/0:1H21:39:250
81500,0rcu_preempt19-21ksoftirqd/122:39:211
81500,0rcu_preempt12742-21cyclictest19:52:400
12744995034,0cyclictest19727-21diskmemload22:56:151
12744995034,0cyclictest19727-21diskmemload22:56:151
12744995034,0cyclictest19727-21diskmemload22:51:151
12744995033,0cyclictest31980-21ssh21:52:331
10050500,0irq/346-484840054-21kswapd023:09:430
10050500,0irq/346-484840054-21kswapd000:23:171
10050500,0irq/346-484840054-21kswapd000:15:100
10050500,0irq/346-484840024110-1kworker/0:2H21:48:290
10050500,0irq/346-48484000-21swapper/022:10:580
81490,0rcu_preempt19-21ksoftirqd/123:22:321
81490,0rcu_preempt19-21ksoftirqd/122:07:371
81490,0rcu_preempt19-21ksoftirqd/121:37:321
81490,0rcu_preempt19-21ksoftirqd/121:27:321
81490,0rcu_preempt19-21ksoftirqd/121:27:321
12744994923,0cyclictest27033-21ssh21:47:331
81480,0rcu_preempt3-21ksoftirqd/020:32:460
81480,0rcu_preempt1350-21lldpd19:17:391
12744994833,0cyclictest19727-21diskmemload00:34:491
12744994832,0cyclictest19727-21diskmemload22:42:371
12744994832,0cyclictest19727-21diskmemload22:42:371
12744994831,0cyclictest19727-21diskmemload23:09:241
10050480,0irq/346-484840054-21kswapd023:04:100
10050480,0irq/346-484840016015-21cron19:17:211
10050480,0irq/346-484840013607-1kworker/0:3H23:47:210
10050480,0irq/346-48484001250-21ssh22:27:031
12744994731,0cyclictest19727-21diskmemload23:05:561
12744994731,0cyclictest19727-21diskmemload22:19:061
12744994731,0cyclictest19727-21diskmemload00:27:321
12744994731,0cyclictest19727-21diskmemload00:17:581
12744994731,0cyclictest19727-21diskmemload00:16:011
12744994730,0cyclictest19727-21diskmemload23:47:051
12744994730,0cyclictest19727-21diskmemload23:38:431
10050470,0irq/346-484840054-21kswapd023:17:281
10050470,0irq/346-484840023482-1kworker/0:2H23:57:370
81460,0rcu_preempt3-21ksoftirqd/023:27:310
81460,0rcu_preempt19-21ksoftirqd/121:25:251
81460,0rcu_preempt19-21ksoftirqd/119:42:491
12744994632,0cyclictest19727-21diskmemload00:02:341
12744994631,0cyclictest19727-21diskmemload22:13:281
12744994630,0cyclictest19727-21diskmemload22:36:511
12744994630,0cyclictest19727-21diskmemload00:09:221
10050460,0irq/346-48484000-21swapper/021:57:080
81450,0rcu_preempt3042-21ssh23:33:201
81450,0rcu_preempt19-21ksoftirqd/119:48:131
81450,0rcu_preempt15754-21kworker/0:020:54:020
81440,0rcu_preempt29416-21kworker/0:119:07:370
81440,0rcu_preempt19-21ksoftirqd/119:34:401
81440,0rcu_preempt19-21ksoftirqd/119:27:451
81440,0rcu_preempt15754-21kworker/0:019:47:380
10050440,0irq/346-48484003288-21sendmail20:17:220
10050440,0irq/346-48484003288-21sendmail20:17:220
10050440,0irq/346-484840011251-1kworker/0:0H20:42:370
9950430,0irq/345-484840016033-21munin-run19:17:220
81430,0rcu_preempt19-21ksoftirqd/120:37:321
9950420,0irq/345-484840023214-21if_eth319:37:480
9950420,0irq/345-484840023214-21if_eth319:37:480
81420,0rcu_preempt19-21ksoftirqd/119:37:221
81420,0rcu_preempt19-21ksoftirqd/119:37:221
81410,0rcu_preempt32569-21apt-get20:07:320
12743994114,0cyclictest0-21swapper/019:32:460
10050410,0irq/346-484840020716-21sshd19:30:030
81400,0rcu_preempt3-21ksoftirqd/020:22:380
81400,0rcu_preempt19-21ksoftirqd/120:47:501
81400,0rcu_preempt19-21ksoftirqd/120:27:421
81400,0rcu_preempt19-21ksoftirqd/119:22:501
10050400,0irq/346-48484006321-1kworker/0:1H20:27:340
10050400,0irq/346-484840017467-21sed20:57:470
81390,0rcu_preempt3-21ksoftirqd/021:02:360
81390,0rcu_preempt19-21ksoftirqd/120:52:311
81390,0rcu_preempt19-21ksoftirqd/120:42:361
81390,0rcu_preempt19-21ksoftirqd/119:02:461
81380,0rcu_preempt3-21ksoftirqd/020:47:450
81380,0rcu_preempt19-21ksoftirqd/120:57:461
81380,0rcu_preempt19-21ksoftirqd/120:32:361
81380,0rcu_preempt19-21ksoftirqd/119:07:411
1599380,0migration/011333-21runrttasks20:40:350
1274399382,0cyclictest0-21swapper/019:44:340
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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