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2026-08-07 - 21:53

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 Aug 07, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
10050770,0irq/346-484840054-21kswapd012:32:560
10050770,0irq/346-484840054-21kswapd011:53:110
10050770,0irq/346-484840011471-1kworker/0:1H10:09:040
10050760,0irq/346-48484008572-1kworker/0:2H10:45:240
10050760,0irq/346-484840054-21kswapd012:23:500
10050750,0irq/346-484840054-21kswapd012:10:230
10050750,0irq/346-484840054-21kswapd012:10:230
10050750,0irq/346-484840029054-1kworker/0:1H09:55:070
10050750,0irq/346-484840010675-1kworker/0:1H11:12:050
81740,0rcu_preempt19-21ksoftirqd/110:55:501
10050740,0irq/346-484840012864-21cyclictest11:08:220
81730,0rcu_preempt14377-21apt-get10:10:020
10050720,0irq/346-484840026226-1kworker/0:2H10:25:110
10050720,0irq/346-484840026226-1kworker/0:2H10:22:370
81710,0rcu_preempt3-21ksoftirqd/012:35:160
10050700,0irq/346-484840032424-1kworker/0:0H12:07:230
10050700,0irq/346-484840021327-1kworker/0:1H10:18:240
81670,0rcu_preempt12591-21ssh11:46:230
81660,0rcu_preempt3-21ksoftirqd/011:19:520
12865996624,0cyclictest17853-1kworker/0:0H09:10:110
81640,0rcu_preempt3-21ksoftirqd/007:55:160
81640,0rcu_preempt19843-21diskmemload12:27:300
12865996424,0cyclictest19219-1kworker/0:2H09:41:490
12865996423,0cyclictest3656-1kworker/0:1H10:31:290
12865996331,0cyclictest7620-21ssh12:15:030
10050630,0irq/346-484840054-21kswapd011:07:061
10050630,0irq/346-484840022589-1kworker/0:3H11:58:330
81620,0rcu_preempt3-21ksoftirqd/008:15:160
12865996230,0cyclictest0-21swapper/007:19:530
12865996223,0cyclictest4408-1kworker/0:0H09:30:310
12865996223,0cyclictest30387-1kworker/0:3H11:34:340
10050620,0irq/346-48484002907-1kworker/0:0H11:41:370
12865996118,0cyclictest0-21swapper/009:25:080
81600,0rcu_preempt3-21ksoftirqd/008:10:230
81600,0rcu_preempt3-21ksoftirqd/008:05:280
12865996021,0cyclictest0-21swapper/010:01:420
10050600,0irq/346-48484008572-1kworker/0:2H10:39:130
10050600,0irq/346-484840054-21kswapd011:37:270
81590,0rcu_preempt3-21ksoftirqd/008:30:180
12865995932,0cyclictest22503-21php-cgi09:45:110
12865995926,0cyclictest32462-21ssh09:22:010
12865995925,0cyclictest28309-1kworker/0:0H10:56:590
12865995925,0cyclictest14451-21runrttasks09:36:320
12865995923,0cyclictest26936-1kworker/0:0H09:18:560
81580,0rcu_preempt3-21ksoftirqd/012:00:030
81580,0rcu_preempt3-21ksoftirqd/008:55:060
12865995831,0cyclictest17800-21munin-run07:24:520
12865995831,0cyclictest17800-21munin-run07:24:520
12865995828,0cyclictest27098-21apt-get09:50:060
12865995827,0cyclictest0-21swapper/011:19:560
12865995826,0cyclictest1445-21runrttasks10:53:330
12865995824,0cyclictest0-21swapper/008:20:190
81570,0rcu_preempt3-21ksoftirqd/008:35:160
81570,0rcu_preempt19-21ksoftirqd/107:32:031
12865995723,0cyclictest0-21swapper/010:43:000
12865995721,0cyclictest0-21swapper/008:25:190
81560,0rcu_preempt3-21ksoftirqd/009:00:120
12865995631,0cyclictest16147-21ping07:35:050
12865995623,0cyclictest782-1kworker/0:2H11:03:110
81550,0rcu_preempt3-21ksoftirqd/011:25:140
81550,0rcu_preempt3-21ksoftirqd/009:05:130
81550,0rcu_preempt3-21ksoftirqd/007:50:050
12865995529,0cyclictest16147-21ping07:45:040
10050550,0irq/346-48484009350-1kworker/1:0H09:33:151
81540,0rcu_preempt3-21ksoftirqd/008:52:230
81540,0rcu_preempt3-21ksoftirqd/008:40:130
12865995422,0cyclictest0-21swapper/007:40:020
12865995422,0cyclictest0-21swapper/007:40:020
81530,0rcu_preempt29230-21kworker/0:108:00:180
81530,0rcu_preempt19-21ksoftirqd/112:37:491
12865995329,0cyclictest16147-21ping07:25:040
12865995320,0cyclictest20152-21date07:30:190
10050530,0irq/346-484840054-21kswapd011:32:531
81520,0rcu_preempt3-21ksoftirqd/007:10:170
81520,0rcu_preempt17245-21apt-get09:40:031
12865995134,0cyclictest11786-21apt-get08:45:030
10050510,0irq/346-4848400304-21ssh12:07:101
81500,0rcu_preempt3-21ksoftirqd/007:05:100
81490,0rcu_preempt19-21ksoftirqd/109:09:531
13250490,0irq/301-48020000-21swapper/111:25:071
10050490,0irq/346-484840017719-1kworker/1:0H11:52:201
81480,0rcu_preempt19-21ksoftirqd/111:45:031
81480,0rcu_preempt19-21ksoftirqd/111:03:571
81480,0rcu_preempt19-21ksoftirqd/107:35:071
10050480,0irq/346-48484000-21swapper/111:10:031
9950470,0irq/345-48484000-21swapper/111:44:291
81470,0rcu_preempt19-21ksoftirqd/110:39:181
81470,0rcu_preempt19-21ksoftirqd/110:19:541
81470,0rcu_preempt19-21ksoftirqd/110:00:031
81470,0rcu_preempt19-21ksoftirqd/107:40:021
81470,0rcu_preempt19-21ksoftirqd/107:40:021
81470,0rcu_preempt16512-21kworker/u4:111:39:201
81460,0rcu_preempt19-21ksoftirqd/108:45:151
10050460,0irq/346-484840016147-21ping07:29:281
10050460,0irq/346-484840013431-21ssh10:41:221
81450,0rcu_preempt32338-21http_loadtime09:55:101
81450,0rcu_preempt19-21ksoftirqd/109:45:221
81450,0rcu_preempt19-21ksoftirqd/108:20:191
10050450,0irq/346-48484006307-21ssh12:13:311
10050450,0irq/346-48484006307-21ssh12:13:311
10050450,0irq/346-484840054-21kswapd012:31:321
10050450,0irq/346-484840022587-1kworker/1:2H11:59:521
81440,0rcu_preempt19843-21diskmemload11:22:341
81440,0rcu_preempt19-21ksoftirqd/110:50:181
81440,0rcu_preempt19-21ksoftirqd/109:10:101
81440,0rcu_preempt19-21ksoftirqd/108:15:231
81440,0rcu_preempt19-21ksoftirqd/107:05:161
10050440,0irq/346-48484004365-21ssh10:32:231
10050440,0irq/346-48484000-21swapper/112:22:471
10050440,0irq/346-48484000-21swapper/110:17:461
81430,0rcu_preempt19-21ksoftirqd/112:27:191
81430,0rcu_preempt19-21ksoftirqd/111:15:031
81430,0rcu_preempt19-21ksoftirqd/110:45:171
81430,0rcu_preempt19-21ksoftirqd/110:13:351
81430,0rcu_preempt19-21ksoftirqd/109:36:031
81430,0rcu_preempt19-21ksoftirqd/109:25:181
81430,0rcu_preempt19-21ksoftirqd/109:18:371
81430,0rcu_preempt19-21ksoftirqd/108:05:281
81430,0rcu_preempt19-21ksoftirqd/107:20:041
81430,0rcu_preempt19-21ksoftirqd/107:20:041
81430,0rcu_preempt19-21ksoftirqd/107:19:521
10050430,0irq/346-48484009003-21sshd12:15:331
10050430,0irq/346-484840029597-21ssh09:52:031
81420,0rcu_preempt29668-21fschecks_count08:00:091
81420,0rcu_preempt19-21ksoftirqd/108:50:021
81420,0rcu_preempt19-21ksoftirqd/108:30:041
10050420,0irq/346-484840029094-21apt-get10:25:041
81410,0rcu_preempt19-21ksoftirqd/112:02:451
81410,0rcu_preempt19-21ksoftirqd/110:07:501
81410,0rcu_preempt19-21ksoftirqd/107:45:061
1699410,0migration/130660-21runrttasks09:20:141
81400,0rcu_preempt29261-21latency_hist07:59:521
81400,0rcu_preempt19-21ksoftirqd/108:40:081
81390,0rcu_preempt19-21ksoftirqd/108:55:161
81380,0rcu_preempt19-21ksoftirqd/109:00:141
81380,0rcu_preempt19-21ksoftirqd/108:14:521
81370,0rcu_preempt19-21ksoftirqd/108:35:191
81370,0rcu_preempt19-21ksoftirqd/108:25:031
81370,0rcu_preempt19-21ksoftirqd/107:50:101
81340,0rcu_preempt19-21ksoftirqd/107:09:531
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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