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2026-09-17 - 00:17

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 Sep 16, 2026 12:44:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81800,0rcu_preempt3-21ksoftirqd/010:19:370
10050780,0irq/346-484840019825-1kworker/0:0H11:14:410
81730,0rcu_preempt3-21ksoftirqd/011:19:280
81730,0rcu_preempt3-21ksoftirqd/010:14:280
81700,0rcu_preempt19-21ksoftirqd/107:19:161
81650,0rcu_preempt3-21ksoftirqd/010:24:390
81580,0rcu_preempt3-21ksoftirqd/011:59:410
13250580,0irq/301-480200054-21kswapd009:19:280
81570,0rcu_preempt22540-1kworker/0:3H11:24:410
219522560,0chrt10050irq/346-484840007:36:590
10050560,0irq/346-48484004251-1kworker/0:1H12:18:200
81550,0rcu_preempt3-21ksoftirqd/009:44:400
81550,0rcu_preempt28515-21ping08:04:370
10050550,0irq/346-484840012334-21idleruntime-cro07:09:140
81540,0rcu_preempt28515-21ping08:19:400
10050540,0irq/346-48484009969-1kworker/0:1H12:28:530
9950530,0irq/345-484840024848-1kworker/0:1H10:54:590
81530,0rcu_preempt3-21ksoftirqd/007:14:270
10050530,0irq/346-484840054-21kswapd011:50:510
10050530,0irq/346-484840024862-21munin-node0
9950520,0irq/345-4848400836-21rngd07:19:210
81520,0rcu_preempt7171-21ssh09:29:280
81520,0rcu_preempt3-21ksoftirqd/008:14:390
81520,0rcu_preempt2147-21ssh09:24:250
292802520,0sleep19950irq/345-484840009:19:141
10050520,0irq/346-484840019825-1kworker/0:0H11:05:120
10050520,0irq/346-484840013161-1kworker/0:2H12:36:390
9950510,0irq/345-4848400836-21rngd11:39:200
81510,0rcu_preempt54-21kswapd007:57:030
81510,0rcu_preempt3-21ksoftirqd/010:43:470
10050510,0irq/346-484840027559-1kworker/0:0H11:30:160
10050510,0irq/346-48484002486-21ssh09:56:380
10050510,0irq/346-484840014226-1kworker/0:0H09:40:520
81500,0rcu_preempt3-21ksoftirqd/011:09:300
81500,0rcu_preempt3-21ksoftirqd/010:34:350
81500,0rcu_preempt3-21ksoftirqd/010:01:180
81500,0rcu_preempt3-21ksoftirqd/009:09:380
10050500,0irq/346-48484005184-1kworker/0:2H11:38:160
10050500,0irq/346-48484004251-1kworker/0:1H12:21:040
10050500,0irq/346-48484001445-21runrttasks10:12:430
10050500,0irq/346-484840011986-1kworker/0:0H10:07:050
10050500,0irq/346-48484000-21swapper/011:54:250
10050500,0irq/346-48484000-21swapper/011:54:250
10050500,0irq/346-48484000-21swapper/011:00:250
81490,0rcu_preempt3-21ksoftirqd/009:34:420
81490,0rcu_preempt3-21ksoftirqd/009:04:380
81490,0rcu_preempt3-21ksoftirqd/008:59:350
81490,0rcu_preempt3-21ksoftirqd/008:09:380
81490,0rcu_preempt19-21ksoftirqd/109:59:251
81480,0rcu_preempt3-21ksoftirqd/011:49:020
81480,0rcu_preempt3-21ksoftirqd/011:49:020
81480,0rcu_preempt3-21ksoftirqd/008:54:280
81480,0rcu_preempt3-21ksoftirqd/008:49:360
81480,0rcu_preempt3-21ksoftirqd/008:00:290
81480,0rcu_preempt3-21ksoftirqd/008:00:290
10050480,0irq/346-484840017939-21ssh10:44:330
81470,0rcu_preempt3-21ksoftirqd/012:06:070
81470,0rcu_preempt3-21ksoftirqd/009:51:340
81470,0rcu_preempt3-21ksoftirqd/007:09:360
81470,0rcu_preempt19-21ksoftirqd/108:03:161
81470,0rcu_preempt19-21ksoftirqd/108:03:161
10050470,0irq/346-484840054-21kswapd010:49:530
10050470,0irq/346-484840032109-1kworker/0:0H10:30:020
81460,0rcu_preempt3-21ksoftirqd/008:44:330
81460,0rcu_preempt3-21ksoftirqd/008:24:290
81460,0rcu_preempt19-21ksoftirqd/107:34:321
81460,0rcu_preempt19-21ksoftirqd/107:19:161
81460,0rcu_preempt15624-21ping07:44:250
4350460,0irq/32-433000003-21ksoftirqd/007:29:290
10050460,0irq/346-484840054-21kswapd008:39:150
81450,0rcu_preempt3-21ksoftirqd/008:34:350
81450,0rcu_preempt19-21ksoftirqd/108:15:481
81450,0rcu_preempt19-21ksoftirqd/107:39:311
81450,0rcu_preempt11418-21ssh10:05:121
4350450,0irq/32-4330000015624-21ping07:24:290
81440,0rcu_preempt6332-21apt-get08:29:230
81430,0rcu_preempt19-21ksoftirqd/110:24:411
81430,0rcu_preempt19-21ksoftirqd/110:12:421
81430,0rcu_preempt19-21ksoftirqd/108:21:401
81430,0rcu_preempt19-21ksoftirqd/108:11:371
81430,0rcu_preempt19-21ksoftirqd/107:58:241
9950420,0irq/345-484840022308-21latency_hist07:39:170
9950420,0irq/345-48484000-21swapper/012:09:180
81420,0rcu_preempt19-21ksoftirqd/112:26:391
81420,0rcu_preempt19-21ksoftirqd/112:19:471
81420,0rcu_preempt19-21ksoftirqd/110:23:211
81420,0rcu_preempt19-21ksoftirqd/109:52:291
81420,0rcu_preempt19-21ksoftirqd/109:46:451
81420,0rcu_preempt19-21ksoftirqd/109:19:321
81420,0rcu_preempt13252-21meminfo10:39:371
143792420,0sleep114053-1kworker/1:2H08:54:141
10050420,0irq/346-484840026091-21munin-node0
81410,0rcu_preempt19-21ksoftirqd/112:38:341
81410,0rcu_preempt19-21ksoftirqd/112:17:001
81410,0rcu_preempt19-21ksoftirqd/110:15:571
81410,0rcu_preempt19-21ksoftirqd/108:39:151
81410,0rcu_preempt19-21ksoftirqd/108:26:051
81410,0rcu_preempt19-21ksoftirqd/108:08:521
81410,0rcu_preempt19-21ksoftirqd/107:09:441
81400,0rcu_preempt19-21ksoftirqd/111:44:421
81400,0rcu_preempt19-21ksoftirqd/111:44:421
81400,0rcu_preempt19-21ksoftirqd/111:14:431
81400,0rcu_preempt19-21ksoftirqd/110:59:451
81400,0rcu_preempt19-21ksoftirqd/110:34:351
81400,0rcu_preempt19-21ksoftirqd/109:55:591
81400,0rcu_preempt19-21ksoftirqd/109:39:341
81400,0rcu_preempt19-21ksoftirqd/108:59:231
81400,0rcu_preempt19-21ksoftirqd/108:44:421
81400,0rcu_preempt19-21ksoftirqd/108:32:511
81400,0rcu_preempt12944-21seq11:11:431
81400,0rcu_preempt0-21swapper/110:46:071
9950390,0irq/345-484840027838-21apt-get11:59:251
81390,0rcu_preempt3-21ksoftirqd/012:33:500
81390,0rcu_preempt19-21ksoftirqd/112:05:251
81390,0rcu_preempt19-21ksoftirqd/111:49:441
81390,0rcu_preempt19-21ksoftirqd/111:37:091
81390,0rcu_preempt19-21ksoftirqd/111:22:091
81390,0rcu_preempt19-21ksoftirqd/110:56:531
81390,0rcu_preempt19-21ksoftirqd/110:49:321
81390,0rcu_preempt19-21ksoftirqd/109:34:521
81380,0rcu_preempt32110-1kworker/1:1H10:29:581
81380,0rcu_preempt19-21ksoftirqd/111:54:301
81380,0rcu_preempt19-21ksoftirqd/111:54:301
81380,0rcu_preempt19-21ksoftirqd/111:44:081
81380,0rcu_preempt19-21ksoftirqd/111:04:371
81380,0rcu_preempt19-21ksoftirqd/109:32:221
81380,0rcu_preempt19-21ksoftirqd/109:25:131
81380,0rcu_preempt19-21ksoftirqd/109:09:221
81380,0rcu_preempt19-21ksoftirqd/109:07:131
81380,0rcu_preempt19-21ksoftirqd/108:39:281
81380,0rcu_preempt19-21ksoftirqd/107:51:491
81370,0rcu_preempt19-21ksoftirqd/112:11:031
81370,0rcu_preempt19-21ksoftirqd/111:24:341
81370,0rcu_preempt19-21ksoftirqd/108:57:131
10050370,0irq/346-48484001133-21ssh11:32:251
81350,0rcu_preempt19-21ksoftirqd/112:29:261
81350,0rcu_preempt19-21ksoftirqd/107:47:481
81350,0rcu_preempt19-21ksoftirqd/107:24:201
81350,0rcu_preempt19-21ksoftirqd/107:04:411
81330,0rcu_preempt19-21ksoftirqd/107:33:591
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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