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2026-08-09 - 16:02

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 Sun Aug 09, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811180,0rcu_preempt3-21ksoftirqd/009:51:430
811160,0rcu_preempt3-21ksoftirqd/009:59:290
811140,0rcu_preempt3-21ksoftirqd/009:25:380
811100,0rcu_preempt3-21ksoftirqd/011:32:320
811020,0rcu_preempt3-21ksoftirqd/012:39:140
811000,0rcu_preempt3-21ksoftirqd/010:06:020
81960,0rcu_preempt3-21ksoftirqd/010:04:030
81870,0rcu_preempt3-21ksoftirqd/007:45:150
81860,0rcu_preempt32725-21kworker/0:111:23:220
81860,0rcu_preempt3-21ksoftirqd/012:00:200
81860,0rcu_preempt3-21ksoftirqd/012:00:200
81860,0rcu_preempt3-21ksoftirqd/007:38:050
81850,0rcu_preempt3-21ksoftirqd/008:45:590
81840,0rcu_preempt13711-21kworker/0:212:09:540
81830,0rcu_preempt7453-21kworker/0:011:35:080
81830,0rcu_preempt7453-21kworker/0:011:35:080
81830,0rcu_preempt7453-21kworker/0:011:25:390
81830,0rcu_preempt3-21ksoftirqd/007:40:210
81830,0rcu_preempt3-21ksoftirqd/007:14:420
81830,0rcu_preempt28844-21kworker/0:009:44:080
81830,0rcu_preempt27129-21kworker/0:011:57:420
81830,0rcu_preempt26541-21kworker/0:012:23:290
81830,0rcu_preempt13939-21kworker/0:008:01:080
81820,0rcu_preempt13711-21kworker/0:212:08:080
81810,0rcu_preempt32725-21kworker/0:111:17:490
81810,0rcu_preempt26541-21kworker/0:012:31:130
81810,0rcu_preempt23447-21kworker/0:211:03:090
81810,0rcu_preempt14490-21kworker/0:011:10:530
81790,0rcu_preempt9046-21kworker/0:010:39:220
81780,0rcu_preempt9046-21kworker/0:010:45:150
81780,0rcu_preempt4552-21diskmemload09:14:100
81780,0rcu_preempt3-21ksoftirqd/011:45:230
81780,0rcu_preempt13793-21ping08:10:150
81780,0rcu_preempt13793-21ping08:05:190
81770,0rcu_preempt4552-21diskmemload09:20:200
81770,0rcu_preempt3-21ksoftirqd/008:26:170
10050770,0irq/346-484840054-21kswapd009:47:420
81760,0rcu_preempt9046-21kworker/0:010:43:320
81760,0rcu_preempt4552-21diskmemload10:26:300
81760,0rcu_preempt3-21ksoftirqd/012:25:220
81760,0rcu_preempt3-21ksoftirqd/008:56:540
81760,0rcu_preempt3-21ksoftirqd/008:20:040
81760,0rcu_preempt3-21ksoftirqd/008:15:590
10050760,0irq/346-484840054-21kswapd010:34:000
10050760,0irq/346-484840054-21kswapd010:34:000
81750,0rcu_preempt54-21kswapd007:52:200
81750,0rcu_preempt4552-21diskmemload12:14:570
81750,0rcu_preempt4552-21diskmemload09:34:210
81750,0rcu_preempt30925-21kworker/0:210:16:030
10050750,0irq/346-484840031306-1kworker/0:1H10:50:390
10050750,0irq/346-484840013697-1kworker/0:1H11:06:010
81740,0rcu_preempt4552-21diskmemload10:57:170
81740,0rcu_preempt3-21ksoftirqd/011:50:170
81740,0rcu_preempt3-21ksoftirqd/008:33:050
10050740,0irq/346-484840054-21kswapd011:42:330
81730,0rcu_preempt4552-21diskmemload10:10:170
81730,0rcu_preempt3-21ksoftirqd/007:59:320
81730,0rcu_preempt3-21ksoftirqd/007:59:320
81720,0rcu_preempt4552-21diskmemload10:20:170
81720,0rcu_preempt3-21ksoftirqd/008:40:370
81720,0rcu_preempt13501-21ssh09:18:390
81720,0rcu_preempt12681-21kworker/0:109:35:570
81710,0rcu_preempt3-21ksoftirqd/008:50:150
81710,0rcu_preempt3-21ksoftirqd/007:16:580
81700,0rcu_preempt3-21ksoftirqd/009:00:280
81680,0rcu_preempt3-21ksoftirqd/008:36:200
81680,0rcu_preempt3-21ksoftirqd/007:30:090
81680,0rcu_preempt3-21ksoftirqd/007:20:240
81660,0rcu_preempt3-21ksoftirqd/007:25:280
81650,0rcu_preempt3-21ksoftirqd/009:05:220
81650,0rcu_preempt3-21ksoftirqd/007:09:500
81610,0rcu_preempt19-21ksoftirqd/107:30:291
81560,0rcu_preempt54-21kswapd007:59:511
81560,0rcu_preempt54-21kswapd007:59:511
9950530,0irq/345-484840018563-21munin-run10:29:501
10050520,0irq/346-484840054-21kswapd011:39:271
10050520,0irq/346-484840054-21kswapd011:39:271
10050520,0irq/346-484840054-21kswapd009:50:551
10050520,0irq/346-484840054-21kswapd009:10:451
81510,0rcu_preempt19-21ksoftirqd/111:15:181
9950500,0irq/345-484840010194-1kworker/1:1H11:40:561
13250500,0irq/301-48020008552-21dropbear11:25:071
10050500,0irq/346-484840010799-21ssh10:54:501
9950490,0irq/345-48484000-21swapper/111:05:111
9950480,0irq/345-48484000-21swapper/111:58:351
9950480,0irq/345-48484000-21swapper/108:59:501
9950470,0irq/345-484840054-21kswapd009:31:061
81470,0rcu_preempt19-21ksoftirqd/110:00:571
10050470,0irq/346-484840054-21kswapd011:34:061
10050470,0irq/346-484840054-21kswapd010:35:021
10050470,0irq/346-484840032285-21sed10:10:141
9950460,0irq/345-4848400836-21rngd09:26:541
9950460,0irq/345-48484000-21swapper/112:37:001
9950460,0irq/345-48484000-21swapper/109:55:451
81460,0rcu_preempt20218-1kworker/1:3H08:19:521
10050460,0irq/346-484840054-21kswapd011:00:171
10050460,0irq/346-484840054-21kswapd009:40:121
10050450,0irq/346-48484007237-1kworker/1:0H09:16:531
10050450,0irq/346-484840032444-21ssh12:21:541
81440,0rcu_preempt19-21ksoftirqd/111:46:131
10050430,0irq/346-4848400836-21rngd10:56:321
10050420,0irq/346-484840054-21kswapd010:17:521
10050420,0irq/346-484840054-21kswapd009:37:041
9950410,0irq/345-4848400811-21ping07:46:381
81410,0rcu_preempt19-21ksoftirqd/110:41:061
10050410,0irq/346-484840054-21kswapd010:34:311
10050410,0irq/346-484840054-21kswapd010:34:311
10050410,0irq/346-48484001179-21sh10:44:571
10050400,0irq/346-484840054-21kswapd012:25:411
10050390,0irq/346-484840031210-21ssh10:09:461
10050390,0irq/346-484840029970-21cyclictest12:00:291
10050390,0irq/346-484840029970-21cyclictest12:00:291
10050390,0irq/346-484840028870-21ssh12:18:421
10050390,0irq/346-484840020984-21munin-node1
81380,0rcu_preempt19-21ksoftirqd/107:07:461
10050380,0irq/346-48484009293-21ssh12:31:091
10050380,0irq/346-4848400811-21ping07:39:511
10050380,0irq/346-484840015286-21ssh09:20:121
10050380,0irq/346-484840011142-21ssh09:49:171
9950370,0irq/345-48484000-21swapper/107:20:111
10050370,0irq/346-484840016861-21ssh12:05:521
10050370,0irq/346-484840010356-21ssh10:20:291
9950360,0irq/345-48484002997299cyclictest11:10:021
9950360,0irq/345-48484000-21swapper/109:06:511
10050360,0irq/346-48484006691-21ssh11:23:061
81350,0rcu_preempt19-21ksoftirqd/108:39:501
10050350,0irq/346-48484001124-21ssh11:50:141
10050340,0irq/346-484840027291-21wget08:40:031
10050340,0irq/346-484840010942-21aten_rapower_vo07:50:031
1699330,0migration/132281-21latency07:15:121
10050330,0irq/346-4848400239722sleep108:30:041
10050330,0irq/346-484840019031-21munin-node1
10050330,0irq/346-48484001445-21runrttasks08:25:301
10050320,0irq/346-48484000-21swapper/107:10:531
1699310,0migration/129911-21unixbench_singl08:45:181
10050310,0irq/346-484840015761-21munin-node1
10050310,0irq/346-48484000-21swapper/108:50:161
9950300,0irq/345-48484002139-21proc_pri09:00:161
10050300,0irq/346-48484000-21swapper/108:00:051
81290,0rcu_preempt0-21swapper/107:42:591
10050290,0irq/346-484840031283-1kworker/1:3H07:25:261
10050290,0irq/346-484840017967-21ls08:10:131
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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