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2026-01-05 - 12:58

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 Mon Jan 05, 2026 00:43:34)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811450,0rcu_preempt3-21ksoftirqd/023:00:520
811420,0rcu_preempt3-21ksoftirqd/000:10:180
811410,0rcu_preempt3-21ksoftirqd/000:08:200
811380,0rcu_preempt3-21ksoftirqd/023:05:210
811380,0rcu_preempt3-21ksoftirqd/022:18:490
811350,0rcu_preempt3-21ksoftirqd/000:03:520
811350,0rcu_preempt14206-21kworker/0:100:16:380
811320,0rcu_preempt3-21ksoftirqd/023:39:480
811320,0rcu_preempt3-21ksoftirqd/023:33:350
811320,0rcu_preempt3-21ksoftirqd/022:20:150
811300,0rcu_preempt3-21ksoftirqd/022:38:380
811300,0rcu_preempt3-21ksoftirqd/022:06:460
811290,0rcu_preempt3-21ksoftirqd/021:25:210
811290,0rcu_preempt3-21ksoftirqd/000:30:220
811280,0rcu_preempt3-21ksoftirqd/022:40:570
811280,0rcu_preempt3-21ksoftirqd/022:40:570
811280,0rcu_preempt3-21ksoftirqd/022:11:510
811280,0rcu_preempt3-21ksoftirqd/021:48:450
811280,0rcu_preempt3-21ksoftirqd/020:35:180
811270,0rcu_preempt3-21ksoftirqd/022:26:380
811260,0rcu_preempt3-21ksoftirqd/023:12:090
811260,0rcu_preempt3-21ksoftirqd/021:13:330
811250,0rcu_preempt3-21ksoftirqd/023:51:290
811250,0rcu_preempt3-21ksoftirqd/019:50:150
811240,0rcu_preempt3-21ksoftirqd/021:32:030
811210,0rcu_preempt3-21ksoftirqd/022:34:350
811130,0rcu_preempt1308-21lldpd20:01:440
811090,0rcu_preempt3-21ksoftirqd/023:20:080
811090,0rcu_preempt3-21ksoftirqd/022:00:000
811080,0rcu_preempt3-21ksoftirqd/021:55:130
811070,0rcu_preempt3-21ksoftirqd/020:10:240
811060,0rcu_preempt3-21ksoftirqd/022:54:500
811040,0rcu_preempt3-21ksoftirqd/022:45:160
811040,0rcu_preempt3-21ksoftirqd/020:25:150
811030,0rcu_preempt3-21ksoftirqd/000:22:560
811020,0rcu_preempt3-21ksoftirqd/021:35:190
811010,0rcu_preempt3-21ksoftirqd/023:29:350
811000,0rcu_preempt54-21kswapd023:45:210
81990,0rcu_preempt3-21ksoftirqd/023:41:570
81990,0rcu_preempt3-21ksoftirqd/021:49:540
81980,0rcu_preempt3-21ksoftirqd/022:51:010
81980,0rcu_preempt3-21ksoftirqd/021:44:150
81980,0rcu_preempt3-21ksoftirqd/020:50:170
81980,0rcu_preempt3-21ksoftirqd/020:40:180
81970,0rcu_preempt3-21ksoftirqd/023:55:540
81960,0rcu_preempt3-21ksoftirqd/021:16:400
81960,0rcu_preempt3-21ksoftirqd/019:25:280
81950,0rcu_preempt3-21ksoftirqd/021:19:580
81890,0rcu_preempt3-21ksoftirqd/000:25:210
281892880,0sleep010050irq/346-484840020:15:250
81850,0rcu_preempt3-21ksoftirqd/023:15:100
81820,0rcu_preempt54-21kswapd020:04:590
81820,0rcu_preempt3-21ksoftirqd/020:24:480
81780,0rcu_preempt19-21ksoftirqd/122:18:291
81770,0rcu_preempt22046-21ping19:57:350
81760,0rcu_preempt3-21ksoftirqd/000:35:050
81760,0rcu_preempt3-21ksoftirqd/000:35:050
81740,0rcu_preempt3-21ksoftirqd/021:05:070
10050720,0irq/346-4848400171rcuc/122:43:311
10050720,0irq/346-4848400171rcuc/122:43:311
9950700,0irq/345-4848400181ktimersoftd/121:39:491
81700,0rcu_preempt3-21ksoftirqd/020:59:480
81700,0rcu_preempt3-21ksoftirqd/019:35:550
10050700,0irq/346-4848400181ktimersoftd/100:09:301
9950690,0irq/345-4848400181ktimersoftd/100:12:431
81690,0rcu_preempt3-21ksoftirqd/020:47:120
81690,0rcu_preempt0-21swapper/021:03:000
9950680,0irq/345-4848400181ktimersoftd/121:40:131
81680,0rcu_preempt3-21ksoftirqd/019:43:310
81680,0rcu_preempt3-21ksoftirqd/019:20:340
81670,0rcu_preempt3-21ksoftirqd/020:32:340
81670,0rcu_preempt3-21ksoftirqd/019:17:580
81670,0rcu_preempt3-21ksoftirqd/019:10:360
81660,0rcu_preempt3-21ksoftirqd/019:45:070
10050660,0irq/346-4848400171rcuc/122:07:071
9950650,0irq/345-4848400171rcuc/100:19:541
81650,0rcu_preempt54-21kswapd019:31:070
10050640,0irq/346-4848400181ktimersoftd/100:25:141
10050630,0irq/346-484840054-21kswapd021:50:091
10050630,0irq/346-4848400181ktimersoftd/100:02:321
10050630,0irq/346-4848400171rcuc/123:05:051
9950620,0irq/345-4848400181ktimersoftd/122:00:231
81620,0rcu_preempt19-21ksoftirqd/121:30:021
9950610,0irq/345-4848400181ktimersoftd/123:25:211
81610,0rcu_preempt12899-21diskmemload23:44:231
10050610,0irq/346-4848400181ktimersoftd/123:46:561
9950600,0irq/345-4848400181ktimersoftd/122:30:161
10050600,0irq/346-4848400681-1kworker/1:0H22:54:101
10050600,0irq/346-484840054-21kswapd023:52:481
10050600,0irq/346-484840054-21kswapd019:55:051
10050590,0irq/346-4848400181ktimersoftd/122:27:301
10050590,0irq/346-4848400181ktimersoftd/121:48:491
10050580,0irq/346-484840054-21kswapd023:56:221
10050580,0irq/346-4848400171rcuc/122:45:281
10050580,0irq/346-4848400171rcuc/122:22:521
10050570,0irq/346-4848400181ktimersoftd/121:16:151
10050560,0irq/346-4848400181ktimersoftd/123:03:571
10050550,0irq/346-4848400171rcuc/121:11:171
9950530,0irq/345-4848400171rcuc/120:39:471
10050530,0irq/346-484840017172-1kworker/1:0H22:36:351
10050520,0irq/346-484840054-21kswapd023:36:331
10050520,0irq/346-484840054-21kswapd000:16:261
10050520,0irq/346-4848400171rcuc/123:10:141
10050510,0irq/346-484840054-21kswapd023:22:051
10050510,0irq/346-484840023932-1kworker/1:1H23:19:131
10050510,0irq/346-4848400181ktimersoftd/119:31:571
10050510,0irq/346-4848400171rcuc/121:20:181
10050510,0irq/346-4848400171rcuc/100:37:431
10050510,0irq/346-4848400171rcuc/100:37:431
81500,0rcu_preempt19-21ksoftirqd/121:29:481
10050490,0irq/346-484840054-21kswapd019:35:251
5928994810,0cyclictest1427-21runrttasks21:04:371
10050480,0irq/346-48484009250-1kworker/1:2H23:32:261
10050480,0irq/346-484840054-21kswapd022:56:481
10050480,0irq/346-484840054-21kswapd000:29:571
10050470,0irq/346-48484007338-1kworker/1:2H21:56:241
10050470,0irq/346-48484003891-1kworker/1:2H22:13:371
9950460,0irq/345-484840022046-21ping20:06:161
9950450,0irq/345-4848400592899cyclictest19:59:561
5928994514,0cyclictest9950irq/345-484840019:40:271
9950440,0irq/345-484840019-21ksoftirqd/120:21:541
592899438,0cyclictest19006-21runrttasks19:49:281
5928994310,0cyclictest28915-21sendmail-msp20:19:491
9950420,0irq/345-484840025952-21dropbear20:10:051
81420,0rcu_preempt3-21ksoftirqd/019:05:170
592899419,0cyclictest10050irq/346-484840020:59:261
592899413,0cyclictest0-21swapper/119:15:221
592899406,0cyclictest4270-21munin-node1
592899401,0cyclictest5051-21ssh20:45:021
592899399,0cyclictest30675-21latency_hist20:24:491
592899397,0cyclictest20643-21runrttasks19:54:271
592899397,0cyclictest11393-21sed21:04:481
592899396,0cyclictest9635-21http_loadtime19:20:111
592899392,0cyclictest0-21swapper/119:28:151
592899382,0cyclictest7245-21runrttasks19:11:311
10050370,0irq/346-484840029071-1kworker/1:1H19:05:001
592899367,0cyclictest866-21grep20:30:191
592899363,0cyclictest0-21swapper/120:54:191
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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