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2026-04-18 - 10:30

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 Sat Apr 18, 2026 00:43:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811140,0rcu_preempt19-21ksoftirqd/121:28:511
811090,0rcu_preempt19-21ksoftirqd/121:56:401
811090,0rcu_preempt19-21ksoftirqd/121:23:291
811090,0rcu_preempt19-21ksoftirqd/120:08:151
811080,0rcu_preempt24103-21kworker/1:122:39:471
811070,0rcu_preempt19-21ksoftirqd/123:26:031
811060,0rcu_preempt19-21ksoftirqd/123:50:081
811060,0rcu_preempt19-21ksoftirqd/122:21:561
811050,0rcu_preempt19-21ksoftirqd/123:19:341
811050,0rcu_preempt19-21ksoftirqd/120:13:461
811050,0rcu_preempt0-21swapper/100:20:171
811040,0rcu_preempt19-21ksoftirqd/122:55:121
811030,0rcu_preempt851-21rngd00:28:111
811020,0rcu_preempt19-21ksoftirqd/122:52:111
811020,0rcu_preempt19-21ksoftirqd/122:04:431
81990,0rcu_preempt54-21kswapd023:37:241
81990,0rcu_preempt54-21kswapd023:37:241
81990,0rcu_preempt19-21ksoftirqd/122:34:431
81990,0rcu_preempt19-21ksoftirqd/121:13:311
81990,0rcu_preempt19-21ksoftirqd/121:11:481
81990,0rcu_preempt19-21ksoftirqd/100:16:521
81980,0rcu_preempt19-21ksoftirqd/122:29:221
81980,0rcu_preempt19-21ksoftirqd/121:45:031
81980,0rcu_preempt0-21swapper/100:01:341
81970,0rcu_preempt19-21ksoftirqd/123:55:311
81970,0rcu_preempt19-21ksoftirqd/122:14:581
81970,0rcu_preempt19-21ksoftirqd/122:02:301
81960,0rcu_preempt19-21ksoftirqd/122:46:521
81960,0rcu_preempt0-21swapper/123:13:091
81960,0rcu_preempt0-21swapper/100:34:121
81950,0rcu_preempt19-21ksoftirqd/100:28:281
81950,0rcu_preempt0-21swapper/123:08:051
81940,0rcu_preempt19-21ksoftirqd/123:29:371
81940,0rcu_preempt19-21ksoftirqd/121:49:521
81930,0rcu_preempt19-21ksoftirqd/122:11:521
81920,0rcu_preempt19-21ksoftirqd/123:40:131
81910,0rcu_preempt19-21ksoftirqd/122:24:491
81910,0rcu_preempt19-21ksoftirqd/119:18:401
81900,0rcu_preempt19-21ksoftirqd/100:04:191
81880,0rcu_preempt19-21ksoftirqd/100:09:161
81840,0rcu_preempt19-21ksoftirqd/120:08:511
81840,0rcu_preempt19-21ksoftirqd/119:41:581
81830,0rcu_preempt19-21ksoftirqd/123:45:281
81820,0rcu_preempt19-21ksoftirqd/123:17:261
81820,0rcu_preempt19-21ksoftirqd/119:57:171
81820,0rcu_preempt19-21ksoftirqd/119:23:441
81810,0rcu_preempt21342-21ping20:28:271
81810,0rcu_preempt19-21ksoftirqd/119:59:221
81800,0rcu_preempt19-21ksoftirqd/120:18:501
81800,0rcu_preempt19-21ksoftirqd/119:46:371
81800,0rcu_preempt19-21ksoftirqd/119:46:371
81790,0rcu_preempt2159-21taskset20:37:491
81790,0rcu_preempt19-21ksoftirqd/121:34:011
81780,0rcu_preempt19-21ksoftirqd/119:32:031
81760,0rcu_preempt19-21ksoftirqd/121:21:401
81760,0rcu_preempt19-21ksoftirqd/120:28:571
81750,0rcu_preempt19-21ksoftirqd/121:40:241
81750,0rcu_preempt19-21ksoftirqd/119:34:021
81740,0rcu_preempt19-21ksoftirqd/120:57:371
10050740,0irq/346-484840026798-1kworker/0:2H21:27:450
10050740,0irq/346-484840021379-1kworker/0:2H21:52:550
10050740,0irq/346-484840017603-1kworker/0:0H23:29:390
81730,0rcu_preempt19-21ksoftirqd/123:02:191
81730,0rcu_preempt19-21ksoftirqd/119:16:311
10050730,0irq/346-484840026269-1kworker/0:3H22:06:360
10050720,0irq/346-484840026269-1kworker/0:3H21:55:360
10050710,0irq/346-48484007745-1kworker/0:2H23:17:190
10050700,0irq/346-484840031228-1kworker/0:0H22:00:080
81690,0rcu_preempt54-21kswapd023:46:190
81690,0rcu_preempt3-21ksoftirqd/000:38:150
81680,0rcu_preempt3-21ksoftirqd/023:13:240
81680,0rcu_preempt19-21ksoftirqd/119:08:371
10050680,0irq/346-484840014418-1kworker/0:0H21:33:130
81670,0rcu_preempt3-21ksoftirqd/021:48:120
81670,0rcu_preempt19-21ksoftirqd/120:52:491
10050670,0irq/346-484840011734-1kworker/0:2H00:27:350
10050660,0irq/346-484840019556-1kworker/0:1H00:11:010
10050660,0irq/346-484840015555-1kworker/0:1H22:51:010
10050660,0irq/346-484840014418-1kworker/0:0H21:12:390
81650,0rcu_preempt54-21kswapd020:48:281
81650,0rcu_preempt54-21kswapd020:13:570
81650,0rcu_preempt19-21ksoftirqd/120:58:541
81650,0rcu_preempt19-21ksoftirqd/119:48:391
81640,0rcu_preempt19-21ksoftirqd/120:42:141
81630,0rcu_preempt19-21ksoftirqd/121:08:001
81620,0rcu_preempt3-21ksoftirqd/022:21:140
81610,0rcu_preempt3-21ksoftirqd/000:21:140
10050570,0irq/346-48484000-21swapper/023:58:280
10050550,0irq/346-484840054-21kswapd022:33:290
10050530,0irq/346-484840054-21kswapd022:38:550
10050530,0irq/346-484840019558-1kworker/0:2H00:04:010
10050520,0irq/346-484840031026-1kworker/0:3H20:28:450
10050510,0irq/346-484840012757-21ssh23:20:270
10050500,0irq/346-4848400851-21rngd19:13:270
10050500,0irq/346-48484005697-1kworker/0:1H22:44:260
9950490,0irq/345-48484000-21swapper/021:21:470
10050490,0irq/346-484840011516-1kworker/0:0H21:42:210
511499479,0cyclictest0-21swapper/023:36:190
511499479,0cyclictest0-21swapper/023:36:190
10050470,0irq/346-48484004369-21zcat19:03:500
10050470,0irq/346-484840015820-21munin-node0
9950460,0irq/345-484840054-21kswapd023:41:350
81460,0rcu_preempt3-21ksoftirqd/022:28:500
10050460,0irq/346-48484009704-1kworker/0:0H23:50:250
10050460,0irq/346-484840054-21kswapd019:59:480
10050460,0irq/346-48484000-21swapper/000:32:350
9950450,0irq/345-484840020475-1kworker/0:2H22:58:260
10050450,0irq/346-484840027119-21ssh23:02:330
10050450,0irq/346-48484000-21swapper/022:26:510
10050450,0irq/346-48484000-21swapper/021:38:270
10050450,0irq/346-48484000-21swapper/021:14:380
10050440,0irq/346-484840019884-21ssh00:00:530
10050440,0irq/346-484840012101-21diskmemload00:13:410
5114994313,0cyclictest0-21swapper/019:43:470
5114994313,0cyclictest0-21swapper/019:43:470
10050430,0irq/346-484840028372-21fschecks_count23:03:450
10050430,0irq/346-484840013204-21ssh22:14:440
9950420,0irq/345-48484007063-21runrttasks22:08:480
5114994212,0cyclictest0-21swapper/019:38:530
511499412,0cyclictest84252chrt19:18:280
5114994014,0cyclictest0-21swapper/020:58:420
5114994010,0cyclictest21342-21ping20:18:450
1599400,0migration/05280-21runrttasks20:45:520
10050400,0irq/346-484840031359-21latency_hist20:28:280
9950390,0irq/345-48484007568-21http_loadtime20:53:430
1599390,0migration/0887-21dropbear20:33:410
5114993812,0cyclictest0-21swapper/019:19:450
34792380,0chrt31026-1kworker/0:3H20:39:130
10050380,0irq/346-484840012035-21sshd21:07:510
81370,0rcu_preempt19-21ksoftirqd/119:05:551
511499372,0cyclictest0-21swapper/019:38:120
511499372,0cyclictest0-21swapper/019:28:150
9950360,0irq/345-48484003642-1kworker/0:1H20:49:560
9950360,0irq/345-48484000-21swapper/020:03:370
9950360,0irq/345-48484000-21swapper/019:48:500
81360,0rcu_preempt0-21swapper/020:12:080
213402350,0chrt21251-1kworker/0:0H19:56:460
10050350,0irq/346-48484003-21ksoftirqd/019:28:510
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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