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2026-04-27 - 09:31

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 Apr 27, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
10050720,0irq/346-484840013452-1kworker/0:1H00:33:050
81690,0rcu_preempt3-21ksoftirqd/020:13:430
81680,0rcu_preempt3-21ksoftirqd/020:48:460
81680,0rcu_preempt3-21ksoftirqd/020:48:460
81660,0rcu_preempt54-21kswapd019:28:460
81660,0rcu_preempt3-21ksoftirqd/020:18:430
81640,0rcu_preempt3-21ksoftirqd/000:13:370
81620,0rcu_preempt3-21ksoftirqd/022:53:360
81620,0rcu_preempt3-21ksoftirqd/020:28:370
81620,0rcu_preempt3-21ksoftirqd/020:28:370
81620,0rcu_preempt3086-21cyclictest23:43:300
81620,0rcu_preempt10319-21kworker/0:223:28:470
10050610,0irq/346-484840054-21kswapd021:50:400
10050610,0irq/346-484840023523-21ssh21:53:481
10050610,0irq/346-484840016400-21ssh23:58:321
81600,0rcu_preempt15519-21tr22:18:440
81590,0rcu_preempt3-21ksoftirqd/023:38:340
81580,0rcu_preempt3-21ksoftirqd/020:53:390
81570,0rcu_preempt3-21ksoftirqd/021:18:380
81570,0rcu_preempt3-21ksoftirqd/000:33:360
81570,0rcu_preempt26820-21ssh00:08:390
10050570,0irq/346-48484001470-21runrttasks00:20:111
9950560,0irq/345-4848400851-21rngd21:37:171
81560,0rcu_preempt3-21ksoftirqd/021:25:450
81560,0rcu_preempt3-21ksoftirqd/021:03:300
81560,0rcu_preempt3-21ksoftirqd/020:43:420
81560,0rcu_preempt3-21ksoftirqd/020:38:420
81560,0rcu_preempt19-21ksoftirqd/120:23:191
81550,0rcu_preempt3-21ksoftirqd/019:33:380
81550,0rcu_preempt25856-21kworker/0:122:15:400
81550,0rcu_preempt25856-21kworker/0:122:15:400
81540,0rcu_preempt3-21ksoftirqd/022:33:370
81540,0rcu_preempt3-21ksoftirqd/022:23:390
81540,0rcu_preempt3-21ksoftirqd/021:13:520
81540,0rcu_preempt3-21ksoftirqd/020:33:290
81530,0rcu_preempt3-21ksoftirqd/023:08:440
81530,0rcu_preempt3-21ksoftirqd/022:11:200
81530,0rcu_preempt3-21ksoftirqd/022:03:450
81530,0rcu_preempt3-21ksoftirqd/019:53:460
81530,0rcu_preempt3-21ksoftirqd/019:48:400
81530,0rcu_preempt3-21ksoftirqd/019:13:380
81530,0rcu_preempt3-21ksoftirqd/019:08:410
81530,0rcu_preempt19-21ksoftirqd/119:23:541
10050530,0irq/346-484840054-21kswapd022:13:371
10050530,0irq/346-484840054-21kswapd022:13:371
10050530,0irq/346-484840019-21ksoftirqd/100:08:421
9950520,0irq/345-48484002828-21missed_timers22:38:431
81520,0rcu_preempt9917-21kworker/0:121:11:250
81520,0rcu_preempt3-21ksoftirqd/023:53:000
81520,0rcu_preempt3-21ksoftirqd/023:36:260
81520,0rcu_preempt3-21ksoftirqd/022:48:400
81520,0rcu_preempt3-21ksoftirqd/022:48:400
81520,0rcu_preempt3-21ksoftirqd/000:23:390
81520,0rcu_preempt3-21ksoftirqd/000:03:330
81520,0rcu_preempt19-21ksoftirqd/123:03:361
10050520,0irq/346-4848400157932sleep123:24:201
81510,0rcu_preempt3-21ksoftirqd/023:58:150
81510,0rcu_preempt3-21ksoftirqd/022:01:030
81510,0rcu_preempt3-21ksoftirqd/021:44:400
81510,0rcu_preempt22596-21kworker/0:222:58:220
81510,0rcu_preempt19372-21ping20:08:200
81510,0rcu_preempt19-21ksoftirqd/119:38:431
10050510,0irq/346-4848400851-21rngd19:20:300
81500,0rcu_preempt3-21ksoftirqd/022:30:570
81500,0rcu_preempt3-21ksoftirqd/021:38:330
81500,0rcu_preempt3-21ksoftirqd/021:34:310
81500,0rcu_preempt3-21ksoftirqd/020:58:380
81500,0rcu_preempt3-21ksoftirqd/020:01:160
81500,0rcu_preempt29542-21ssh23:05:430
81500,0rcu_preempt25856-21kworker/0:121:32:290
81500,0rcu_preempt19-21ksoftirqd/100:13:201
10050500,0irq/346-484840032662chrt22:06:391
10050500,0irq/346-484840017482-21ssh23:58:490
10050500,0irq/346-48484001223-1kworker/1:1H23:46:311
10050500,0irq/346-484840010354-1kworker/1:1H21:26:401
9950490,0irq/345-4848400851-21rngd22:02:361
81490,0rcu_preempt3-21ksoftirqd/023:13:410
81490,0rcu_preempt3-21ksoftirqd/022:41:020
81490,0rcu_preempt3-21ksoftirqd/020:23:510
81490,0rcu_preempt21289-21apt-get20:03:300
10050490,0irq/346-484840011017-1kworker/1:1H22:29:471
81480,0rcu_preempt3-21ksoftirqd/023:24:430
81480,0rcu_preempt3-21ksoftirqd/023:21:110
81480,0rcu_preempt3-21ksoftirqd/019:03:380
81480,0rcu_preempt22596-21kworker/0:222:45:000
81480,0rcu_preempt10070-21diskmemload21:55:190
10050480,0irq/346-484840021046-1kworker/1:0H00:06:021
9950470,0irq/345-48484006367-21ping19:33:511
81470,0rcu_preempt3-21ksoftirqd/000:19:280
81470,0rcu_preempt19-21ksoftirqd/122:18:451
81470,0rcu_preempt19-21ksoftirqd/120:18:201
81470,0rcu_preempt19-21ksoftirqd/119:43:421
81460,0rcu_preempt9950irq/345-484840021:50:171
81460,0rcu_preempt19-21ksoftirqd/122:58:301
81460,0rcu_preempt19-21ksoftirqd/119:28:311
10050460,0irq/346-48484007841-21munin-node1
10050460,0irq/346-484840054-21kswapd020:50:441
10050460,0irq/346-484840054-21kswapd020:50:441
10050460,0irq/346-484840010070-21diskmemload21:43:531
81450,0rcu_preempt19-21ksoftirqd/122:48:321
81450,0rcu_preempt19-21ksoftirqd/122:48:321
81450,0rcu_preempt19-21ksoftirqd/120:03:361
81440,0rcu_preempt19-21ksoftirqd/123:55:461
81440,0rcu_preempt19-21ksoftirqd/119:03:371
9950430,0irq/345-484840018032-1kworker/1:0H21:21:481
81430,0rcu_preempt4356-21ssh23:13:311
81430,0rcu_preempt3-21ksoftirqd/019:23:460
81430,0rcu_preempt19-21ksoftirqd/123:48:311
81430,0rcu_preempt19-21ksoftirqd/123:28:351
81430,0rcu_preempt19-21ksoftirqd/122:23:311
81430,0rcu_preempt19-21ksoftirqd/122:08:301
81430,0rcu_preempt19-21ksoftirqd/120:28:471
81430,0rcu_preempt19-21ksoftirqd/120:28:471
81430,0rcu_preempt19-21ksoftirqd/119:18:331
10050430,0irq/346-484840081rcu_preempt21:39:271
10050430,0irq/346-484840049912sleep119:13:321
81420,0rcu_preempt9473-21kworker/0:019:43:180
81420,0rcu_preempt19-21ksoftirqd/123:38:241
81420,0rcu_preempt19-21ksoftirqd/122:33:301
81420,0rcu_preempt19-21ksoftirqd/121:28:311
81420,0rcu_preempt19-21ksoftirqd/100:33:361
81410,0rcu_preempt3-21ksoftirqd/019:47:540
81410,0rcu_preempt20880-1kworker/1:0H20:03:181
81410,0rcu_preempt19-21ksoftirqd/123:19:321
81410,0rcu_preempt19-21ksoftirqd/120:38:301
81410,0rcu_preempt19-21ksoftirqd/119:53:311
81410,0rcu_preempt19-21ksoftirqd/119:48:431
81410,0rcu_preempt0-21swapper/119:08:311
81400,0rcu_preempt19-21ksoftirqd/123:33:441
81400,0rcu_preempt19-21ksoftirqd/123:09:581
81400,0rcu_preempt19-21ksoftirqd/122:54:551
81400,0rcu_preempt19-21ksoftirqd/121:13:211
81400,0rcu_preempt19-21ksoftirqd/121:08:301
81400,0rcu_preempt19-21ksoftirqd/100:28:301
81400,0rcu_preempt19-21ksoftirqd/100:28:131
10050400,0irq/346-48484000-21swapper/120:48:191
81390,0rcu_preempt19-21ksoftirqd/120:38:191
81380,0rcu_preempt5256-21latency_hist20:53:191
81380,0rcu_preempt19-21ksoftirqd/120:13:191
81370,0rcu_preempt19-21ksoftirqd/120:23:451
81360,0rcu_preempt19-21ksoftirqd/121:08:191
81340,0rcu_preempt19-21ksoftirqd/120:58:461
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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