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2026-07-05 - 06:06

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 Sun Jul 05, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811090,0rcu_preempt11171-21grep23:27:381
811010,0rcu_preempt19-21ksoftirqd/122:06:181
81990,0rcu_preempt3-21ksoftirqd/021:55:260
81960,0rcu_preempt3-21ksoftirqd/023:57:080
81920,0rcu_preempt19-21ksoftirqd/121:57:231
81900,0rcu_preempt12854-21munin-plugin-st22:57:110
81860,0rcu_preempt54-21kswapd022:57:111
81840,0rcu_preempt19-21ksoftirqd/121:38:561
81800,0rcu_preempt19-21ksoftirqd/121:22:491
81780,0rcu_preempt11181-21kworker/1:122:38:421
81690,0rcu_preempt3-21ksoftirqd/022:40:020
81680,0rcu_preempt8048-21grep21:12:411
81680,0rcu_preempt19-21ksoftirqd/122:43:281
81680,0rcu_preempt19-21ksoftirqd/122:12:301
81670,0rcu_preempt19-21ksoftirqd/119:37:381
81670,0rcu_preempt19-21ksoftirqd/119:20:521
81650,0rcu_preempt19-21ksoftirqd/122:23:451
81650,0rcu_preempt19-21ksoftirqd/121:43:071
81640,0rcu_preempt19-21ksoftirqd/100:04:521
81640,0rcu_preempt17241-21ssh22:27:431
81620,0rcu_preempt19-21ksoftirqd/100:22:061
81600,0rcu_preempt19-21ksoftirqd/123:20:251
81600,0rcu_preempt19-21ksoftirqd/123:07:201
9950590,0irq/345-4848400181ktimersoftd/100:35:441
81590,0rcu_preempt54-21kswapd000:30:271
9950580,0irq/345-4848400181ktimersoftd/123:00:051
9950580,0irq/345-4848400181ktimersoftd/123:00:051
9950580,0irq/345-4848400181ktimersoftd/121:50:241
9950570,0irq/345-484840081rcu_preempt21:55:181
9950570,0irq/345-4848400171rcuc/100:12:371
81570,0rcu_preempt19-21ksoftirqd/119:07:281
10050570,0irq/346-48484009844-1kworker/0:3H00:02:280
10050570,0irq/346-48484009192-1kworker/0:0H21:14:290
81560,0rcu_preempt3-21ksoftirqd/023:14:060
81560,0rcu_preempt28583-21ssh23:45:460
81560,0rcu_preempt1854-21diskmemload21:43:080
10050560,0irq/346-484840030990-1kworker/0:0H22:12:340
9950550,0irq/345-484840019-21ksoftirqd/121:20:371
9950550,0irq/345-4848400171rcuc/123:52:041
81550,0rcu_preempt3-21ksoftirqd/023:27:350
81550,0rcu_preempt3-21ksoftirqd/022:36:110
81550,0rcu_preempt19-21ksoftirqd/120:17:301
81550,0rcu_preempt19-21ksoftirqd/100:09:311
13250550,0irq/301-4802000181ktimersoftd/122:17:261
9950540,0irq/345-4848400181ktimersoftd/123:22:231
9950540,0irq/345-4848400171rcuc/121:31:121
81540,0rcu_preempt3-21ksoftirqd/020:32:300
81540,0rcu_preempt23124-21kworker/0:122:57:240
81540,0rcu_preempt23124-21kworker/0:122:57:240
81540,0rcu_preempt19-21ksoftirqd/120:07:241
81540,0rcu_preempt19-21ksoftirqd/100:01:061
10050540,0irq/346-484840026073-1kworker/0:3H22:06:360
10050540,0irq/346-484840017600-1kworker/0:2H23:37:420
10050540,0irq/346-484840013397-1kworker/0:2H22:28:480
81530,0rcu_preempt4893-21kworker/0:223:35:030
81530,0rcu_preempt3-21ksoftirqd/023:57:320
81530,0rcu_preempt3-21ksoftirqd/023:22:290
81530,0rcu_preempt3-21ksoftirqd/023:07:210
81530,0rcu_preempt3-21ksoftirqd/022:42:260
81530,0rcu_preempt3-21ksoftirqd/019:57:240
81530,0rcu_preempt3-21ksoftirqd/019:49:180
81530,0rcu_preempt19-21ksoftirqd/122:47:381
10050530,0irq/346-484840023962-1kworker/0:1H21:32:190
9950520,0irq/345-484840019-21ksoftirqd/123:54:001
81520,0rcu_preempt3-21ksoftirqd/022:17:350
81520,0rcu_preempt3-21ksoftirqd/021:57:300
10050520,0irq/346-484840019705-1kworker/0:1H00:13:140
10050520,0irq/346-484840014132-1kworker/0:3H21:21:470
9950510,0irq/345-4848400181ktimersoftd/123:03:501
9950510,0irq/345-4848400171rcuc/122:11:441
81510,0rcu_preempt3-21ksoftirqd/021:37:290
81510,0rcu_preempt19301-21kworker/0:220:30:240
81510,0rcu_preempt18944-21kworker/0:000:29:130
81510,0rcu_preempt11106-21kworker/0:120:02:340
9950500,0irq/345-4848400916-21latency_hist22:12:120
81500,0rcu_preempt9042-21kworker/0:100:36:480
81500,0rcu_preempt3-21ksoftirqd/023:47:310
81500,0rcu_preempt3-21ksoftirqd/021:51:560
81500,0rcu_preempt3-21ksoftirqd/020:37:310
81500,0rcu_preempt3-21ksoftirqd/019:54:310
81500,0rcu_preempt19-21ksoftirqd/120:12:311
81500,0rcu_preempt19-21ksoftirqd/119:52:281
81500,0rcu_preempt1854-21diskmemload23:05:210
81500,0rcu_preempt0-21swapper/123:16:001
81500,0rcu_preempt0-21swapper/121:11:221
81490,0rcu_preempt3-21ksoftirqd/023:18:220
81490,0rcu_preempt3-21ksoftirqd/022:51:070
81490,0rcu_preempt3-21ksoftirqd/021:29:360
81490,0rcu_preempt3-21ksoftirqd/020:22:120
81490,0rcu_preempt3-21ksoftirqd/019:12:310
81490,0rcu_preempt10994-21ping20:12:380
2727499491,0cyclictest6331-21sh19:42:110
9950480,0irq/345-484840030551-21ping19:22:120
81480,0rcu_preempt3-21ksoftirqd/021:26:570
81480,0rcu_preempt3-21ksoftirqd/020:23:420
81480,0rcu_preempt19-21ksoftirqd/123:46:361
81480,0rcu_preempt19-21ksoftirqd/119:47:321
10050480,0irq/346-48484008464-1kworker/0:0H22:23:240
81470,0rcu_preempt54-21kswapd021:05:310
81470,0rcu_preempt3-21ksoftirqd/021:07:410
81470,0rcu_preempt3-21ksoftirqd/020:52:310
81470,0rcu_preempt3-21ksoftirqd/020:07:340
81470,0rcu_preempt3-21ksoftirqd/000:17:320
81470,0rcu_preempt19-21ksoftirqd/119:57:331
81460,0rcu_preempt3-21ksoftirqd/020:47:360
81460,0rcu_preempt3-21ksoftirqd/000:22:470
81460,0rcu_preempt3-21ksoftirqd/000:11:310
81460,0rcu_preempt19-21ksoftirqd/120:22:411
81460,0rcu_preempt19-21ksoftirqd/120:02:261
81450,0rcu_preempt3-21ksoftirqd/019:45:300
81450,0rcu_preempt19-21ksoftirqd/123:37:231
81450,0rcu_preempt19-21ksoftirqd/122:35:171
81450,0rcu_preempt19-21ksoftirqd/119:12:311
10050450,0irq/346-484840026196-21munin-node0
81440,0rcu_preempt19-21ksoftirqd/100:22:221
81430,0rcu_preempt7754-1kworker/1:1H23:33:031
81430,0rcu_preempt19-21ksoftirqd/119:44:281
81430,0rcu_preempt19-21ksoftirqd/119:27:361
81420,0rcu_preempt3-21ksoftirqd/019:09:180
81420,0rcu_preempt3-21ksoftirqd/019:05:170
81420,0rcu_preempt19-21ksoftirqd/120:32:261
81420,0rcu_preempt19-21ksoftirqd/119:22:471
81420,0rcu_preempt19-21ksoftirqd/119:02:271
10050420,0irq/346-48484003-21ksoftirqd/019:22:400
81410,0rcu_preempt31392-21munin-node0
81410,0rcu_preempt19-21ksoftirqd/121:32:371
81410,0rcu_preempt19-21ksoftirqd/120:57:381
81410,0rcu_preempt19-21ksoftirqd/120:42:301
81400,0rcu_preempt19-21ksoftirqd/119:37:121
81390,0rcu_preempt19-21ksoftirqd/120:37:311
81370,0rcu_preempt19-21ksoftirqd/120:55:071
81360,0rcu_preempt3-21ksoftirqd/019:32:430
81360,0rcu_preempt2155-21meminfo19:27:390
81360,0rcu_preempt19-21ksoftirqd/121:06:301
81360,0rcu_preempt19-21ksoftirqd/120:47:351
81340,0rcu_preempt19-21ksoftirqd/120:29:451
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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