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2026-06-17 - 07:34

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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Click on a legend element to toggle display of that core, ctrl-click inverts display, shift-click enables all.

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 17, 2026 00:43:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811510,0rcu_preempt3-21ksoftirqd/022:12:530
811140,0rcu_preempt19-21ksoftirqd/120:15:431
81940,0rcu_preempt19-21ksoftirqd/123:01:261
81920,0rcu_preempt19-21ksoftirqd/121:56:391
81890,0rcu_preempt0-21swapper/121:18:201
81880,0rcu_preempt19-21ksoftirqd/122:39:311
81850,0rcu_preempt19-21ksoftirqd/122:43:041
81820,0rcu_preempt16898-21ssh22:12:531
81810,0rcu_preempt19-21ksoftirqd/122:55:011
81760,0rcu_preempt19-21ksoftirqd/122:11:201
10050750,0irq/346-4848400171rcuc/121:27:421
81740,0rcu_preempt19-21ksoftirqd/100:18:041
81730,0rcu_preempt3-21ksoftirqd/023:14:400
81730,0rcu_preempt3-21ksoftirqd/022:05:150
81720,0rcu_preempt19-21ksoftirqd/123:22:211
81720,0rcu_preempt19-21ksoftirqd/122:27:361
81720,0rcu_preempt19-21ksoftirqd/122:19:501
10050720,0irq/346-4848400171rcuc/121:57:431
81710,0rcu_preempt0-21swapper/121:36:531
81680,0rcu_preempt3-21ksoftirqd/000:33:520
81680,0rcu_preempt3-21ksoftirqd/000:07:410
81670,0rcu_preempt851-21rngd23:54:030
81670,0rcu_preempt3-21ksoftirqd/021:42:130
10050670,0irq/346-484840019-21ksoftirqd/100:34:041
10050660,0irq/346-4848400171rcuc/123:27:421
81650,0rcu_preempt19-21ksoftirqd/121:08:481
81640,0rcu_preempt19-21ksoftirqd/122:26:501
10050640,0irq/346-4848400171rcuc/122:52:041
81630,0rcu_preempt19-21ksoftirqd/123:57:541
81630,0rcu_preempt19-21ksoftirqd/100:03:531
10050630,0irq/346-484840020466-1kworker/0:3H23:59:400
10050630,0irq/346-4848400171rcuc/122:06:271
10050630,0irq/346-4848400171rcuc/121:45:261
10050630,0irq/346-4848400171rcuc/100:32:021
10050630,0irq/346-48484001537-1kworker/0:1H21:25:040
81620,0rcu_preempt19-21ksoftirqd/123:07:481
81620,0rcu_preempt19-21ksoftirqd/121:51:581
81620,0rcu_preempt19-21ksoftirqd/119:12:521
10050620,0irq/346-4848400171rcuc/123:54:151
10050620,0irq/346-484840015910-1kworker/0:1H22:47:530
81610,0rcu_preempt19-21ksoftirqd/123:44:101
10050610,0irq/346-484840028344-21ssh22:57:420
10050610,0irq/346-484840012824-1kworker/0:0H00:20:260
81600,0rcu_preempt13326-21kworker/1:221:12:421
10050600,0irq/346-48484004859-1kworker/0:0H23:39:180
10050600,0irq/346-484840027722-21ssh00:02:360
10050600,0irq/346-4848400171rcuc/100:11:071
10050600,0irq/346-4848400137762sleep119:17:591
81590,0rcu_preempt19-21ksoftirqd/123:34:501
10050590,0irq/346-48484002645-21sed21:58:000
9950580,0irq/345-484840030738-21df23:32:420
10050580,0irq/346-48484008886-21http_loadtime22:37:490
10050580,0irq/346-4848400171rcuc/121:39:251
10050580,0irq/346-484840015910-1kworker/0:1H22:45:500
10050580,0irq/346-484840013690-1kworker/0:2H22:12:010
81570,0rcu_preempt19-21ksoftirqd/122:35:271
81570,0rcu_preempt19-21ksoftirqd/100:23:441
10050570,0irq/346-484840029007-1kworker/0:0H21:19:470
10050570,0irq/346-484840020095-21munin-node0
10050570,0irq/346-484840012824-1kworker/0:0H00:22:540
81550,0rcu_preempt19-21ksoftirqd/121:02:501
81550,0rcu_preempt19-21ksoftirqd/120:08:011
10050550,0irq/346-484840041ktimersoftd/023:23:130
10050550,0irq/346-484840025805-1kworker/0:1H22:57:040
9950540,0irq/345-48484003324-1kworker/0:2H23:06:150
9950540,0irq/345-48484000-21swapper/000:15:480
81540,0rcu_preempt3-21ksoftirqd/023:19:340
81540,0rcu_preempt19-21ksoftirqd/120:20:471
10050540,0irq/346-484840026270-1kworker/0:0H21:52:470
10050540,0irq/346-484840019073-21munin-node0
9950530,0irq/345-484840016351-1kworker/0:1H21:08:500
81530,0rcu_preempt3-21ksoftirqd/020:47:470
81530,0rcu_preempt3-21ksoftirqd/020:17:560
81530,0rcu_preempt3-21ksoftirqd/019:55:390
10050530,0irq/346-48484003324-1kworker/0:2H23:07:440
9950520,0irq/345-48484000-21swapper/023:43:040
81520,0rcu_preempt54-21kswapd021:12:530
10050520,0irq/346-4848400171rcuc/120:01:011
81510,0rcu_preempt3-21ksoftirqd/021:48:240
81510,0rcu_preempt3-21ksoftirqd/021:33:290
81510,0rcu_preempt23930-21kworker/u4:022:27:590
10050510,0irq/346-48484008230-21ssh22:37:290
10050510,0irq/346-4848400171rcuc/123:15:121
10050510,0irq/346-4848400171rcuc/121:22:541
81500,0rcu_preempt3-21ksoftirqd/020:22:470
81500,0rcu_preempt3-21ksoftirqd/019:19:340
81500,0rcu_preempt19-21ksoftirqd/123:23:001
81500,0rcu_preempt19-21ksoftirqd/119:52:471
10050500,0irq/346-484840028123-1kworker/0:1H23:31:430
10050500,0irq/346-484840026199-1kworker/0:0H22:25:010
10050500,0irq/346-4848400171rcuc/123:03:191
9950490,0irq/345-484840012977-21apt-get23:47:400
10050490,0irq/346-4848400171rcuc/123:49:201
10050490,0irq/346-484840012582-1kworker/0:0H19:13:580
10050490,0irq/346-48484000-21swapper/021:28:430
9950480,0irq/345-48484000-21swapper/021:01:060
81480,0rcu_preempt3-21ksoftirqd/019:10:580
81480,0rcu_preempt19-21ksoftirqd/120:02:481
81470,0rcu_preempt6936-21ssh23:41:251
81470,0rcu_preempt3-21ksoftirqd/020:12:580
81470,0rcu_preempt3-21ksoftirqd/020:02:570
81470,0rcu_preempt19-21ksoftirqd/120:22:301
81470,0rcu_preempt15382-21diskstats21:02:460
9950460,0irq/345-4848400171rcuc/120:48:291
9950460,0irq/345-484840012929-21ping19:22:460
964799468,0cyclictest2897-1kworker/1:2H00:14:381
81460,0rcu_preempt19-21ksoftirqd/119:38:051
10050460,0irq/346-484840024003-21ssh22:20:030
9950450,0irq/345-484840012929-21ping19:42:550
964799458,0cyclictest19513-21touch19:37:301
81450,0rcu_preempt8590-21apt-get20:42:400
81450,0rcu_preempt54-21kswapd021:01:061
81450,0rcu_preempt3-21ksoftirqd/019:57:410
81450,0rcu_preempt3-21ksoftirqd/019:52:180
81450,0rcu_preempt19-21ksoftirqd/119:32:211
81450,0rcu_preempt19-21ksoftirqd/119:02:391
81440,0rcu_preempt3-21ksoftirqd/020:34:110
81440,0rcu_preempt3-21ksoftirqd/020:07:310
81440,0rcu_preempt3-21ksoftirqd/019:02:400
81430,0rcu_preempt19-21ksoftirqd/119:43:141
10050430,0irq/346-484840011411-1kworker/0:1H20:52:510
81420,0rcu_preempt19-21ksoftirqd/120:42:491
81420,0rcu_preempt19-21ksoftirqd/120:32:411
10050420,0irq/346-48484003917-21wget20:27:460
9950410,0irq/345-48484000-21swapper/020:37:310
81410,0rcu_preempt54-21kswapd020:55:011
81410,0rcu_preempt19-21ksoftirqd/119:22:381
9950400,0irq/345-48484000-21swapper/019:28:340
964699402,0cyclictest12929-21ping19:36:050
81400,0rcu_preempt19-21ksoftirqd/119:48:021
81390,0rcu_preempt8126-1kworker/1:1H20:41:081
81390,0rcu_preempt19-21ksoftirqd/120:31:461
81390,0rcu_preempt19-21ksoftirqd/119:07:501
81380,0rcu_preempt12929-21ping19:38:030
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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