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2026-06-14 - 08:55

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 Sun Jun 14, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81810,0rcu_preempt3460-21diskmemload23:57:461
81740,0rcu_preempt19-21ksoftirqd/122:52:491
81690,0rcu_preempt8411-21kworker/u4:022:37:581
4350690,0irq/32-4330000023178-21dropbear21:27:461
81660,0rcu_preempt3-21ksoftirqd/022:37:470
81650,0rcu_preempt3460-21diskmemload21:57:501
81640,0rcu_preempt3-21ksoftirqd/000:32:360
81640,0rcu_preempt3-21ksoftirqd/000:32:360
81620,0rcu_preempt3-21ksoftirqd/022:08:000
81620,0rcu_preempt19-21ksoftirqd/122:49:451
81620,0rcu_preempt19-21ksoftirqd/122:49:451
81620,0rcu_preempt19-21ksoftirqd/122:02:591
81610,0rcu_preempt3-21ksoftirqd/023:27:470
81600,0rcu_preempt3-21ksoftirqd/020:52:440
81600,0rcu_preempt3-21ksoftirqd/020:52:440
81590,0rcu_preempt3460-21diskmemload23:27:451
81590,0rcu_preempt3460-21diskmemload22:12:501
81580,0rcu_preempt3460-21diskmemload21:17:511
81580,0rcu_preempt3-21ksoftirqd/023:07:510
81580,0rcu_preempt3-21ksoftirqd/023:02:250
81580,0rcu_preempt3-21ksoftirqd/021:42:440
81580,0rcu_preempt19-21ksoftirqd/123:47:501
81570,0rcu_preempt3-21ksoftirqd/023:47:560
81570,0rcu_preempt3-21ksoftirqd/023:22:480
81570,0rcu_preempt3-21ksoftirqd/023:22:480
81570,0rcu_preempt12640-21ping20:03:030
81560,0rcu_preempt3-21ksoftirqd/022:37:330
81560,0rcu_preempt3-21ksoftirqd/021:17:520
81560,0rcu_preempt3-21ksoftirqd/020:42:440
81560,0rcu_preempt3-21ksoftirqd/000:08:070
81560,0rcu_preempt12640-21ping20:12:330
10050560,0irq/346-4848400851-21rngd22:48:480
10050560,0irq/346-4848400851-21rngd22:48:480
81550,0rcu_preempt3-21ksoftirqd/022:22:540
81550,0rcu_preempt3-21ksoftirqd/021:32:440
81550,0rcu_preempt3-21ksoftirqd/020:57:440
81550,0rcu_preempt19-21ksoftirqd/100:03:021
81540,0rcu_preempt3-21ksoftirqd/000:27:570
81540,0rcu_preempt19-21ksoftirqd/119:52:591
81540,0rcu_preempt18987-21kworker/0:019:22:340
81530,0rcu_preempt3460-21diskmemload22:22:561
81530,0rcu_preempt3-21ksoftirqd/023:32:450
81530,0rcu_preempt3-21ksoftirqd/023:32:450
81530,0rcu_preempt3-21ksoftirqd/022:13:010
81530,0rcu_preempt3-21ksoftirqd/021:53:410
81530,0rcu_preempt3-21ksoftirqd/019:45:450
81530,0rcu_preempt3-21ksoftirqd/000:17:470
81530,0rcu_preempt3-21ksoftirqd/000:02:520
81530,0rcu_preempt19-21ksoftirqd/121:32:561
81530,0rcu_preempt15963-1kworker/0:2H21:22:510
81520,0rcu_preempt3-21ksoftirqd/022:18:070
81520,0rcu_preempt3-21ksoftirqd/021:50:540
81520,0rcu_preempt3-21ksoftirqd/021:42:330
81520,0rcu_preempt19-21ksoftirqd/121:12:581
81520,0rcu_preempt19-21ksoftirqd/120:08:021
28872995211,0cyclictest19560-21apt-get21:57:440
81510,0rcu_preempt3460-21diskmemload00:08:081
81510,0rcu_preempt3-21ksoftirqd/023:37:460
81510,0rcu_preempt3-21ksoftirqd/019:16:560
81510,0rcu_preempt24510-21apt-get20:32:430
81510,0rcu_preempt21229-21seq00:12:430
81500,0rcu_preempt3-21ksoftirqd/023:57:420
81500,0rcu_preempt3-21ksoftirqd/023:12:430
81500,0rcu_preempt3-21ksoftirqd/023:02:540
81500,0rcu_preempt3-21ksoftirqd/021:02:450
81500,0rcu_preempt3-21ksoftirqd/020:49:470
81500,0rcu_preempt2532-21meminfo23:52:550
81500,0rcu_preempt19-21ksoftirqd/121:07:511
81490,0rcu_preempt9160-21munin-node0
81490,0rcu_preempt3-21ksoftirqd/020:37:480
10050490,0irq/346-4848400851-21rngd22:55:530
81480,0rcu_preempt3-21ksoftirqd/023:17:460
81480,0rcu_preempt3-21ksoftirqd/022:42:330
81480,0rcu_preempt3-21ksoftirqd/021:27:420
81480,0rcu_preempt3-21ksoftirqd/019:47:550
81480,0rcu_preempt1348-21lldpd23:42:510
81480,0rcu_preempt1348-21lldpd22:02:480
10050480,0irq/346-48484003-21ksoftirqd/019:18:010
81470,0rcu_preempt714-21ssh21:37:531
81470,0rcu_preempt3-21ksoftirqd/022:28:030
81470,0rcu_preempt3-21ksoftirqd/021:07:410
81470,0rcu_preempt32152-21ping19:27:440
81470,0rcu_preempt25042-21ssh23:42:531
81470,0rcu_preempt19-21ksoftirqd/121:46:571
81460,0rcu_preempt3460-21diskmemload00:17:511
81460,0rcu_preempt3-21ksoftirqd/019:07:520
81460,0rcu_preempt3-21ksoftirqd/000:22:510
9950450,0irq/345-4848400589-1kworker/1:1H22:45:461
81450,0rcu_preempt3-21ksoftirqd/020:17:540
81450,0rcu_preempt3-21ksoftirqd/020:07:520
2887299457,0cyclictest0-21swapper/020:25:150
10050450,0irq/346-484840031958-1kworker/1:2H22:10:121
10050450,0irq/346-484840027652-21munin-node0
10050450,0irq/346-484840015097-21munin-node1
10050450,0irq/346-484840015097-21munin-node1
81440,0rcu_preempt19-21ksoftirqd/121:22:561
10050440,0irq/346-48484000-21swapper/100:24:321
81430,0rcu_preempt3460-21diskmemload23:22:581
81430,0rcu_preempt3460-21diskmemload23:22:581
81430,0rcu_preempt19-21ksoftirqd/123:12:491
81430,0rcu_preempt19-21ksoftirqd/123:06:531
81430,0rcu_preempt19-21ksoftirqd/119:18:061
81420,0rcu_preempt6685-21munin-node0
81420,0rcu_preempt19-21ksoftirqd/123:12:321
81420,0rcu_preempt19-21ksoftirqd/121:57:011
81420,0rcu_preempt19-21ksoftirqd/119:43:091
81420,0rcu_preempt19-21ksoftirqd/119:37:361
81420,0rcu_preempt19-21ksoftirqd/119:32:431
81420,0rcu_preempt19-21ksoftirqd/119:27:481
81410,0rcu_preempt2501-21ssh23:19:211
81410,0rcu_preempt23320-21if_eth220:27:511
81410,0rcu_preempt19-21ksoftirqd/120:23:411
81410,0rcu_preempt19-21ksoftirqd/100:32:541
81410,0rcu_preempt19-21ksoftirqd/100:32:541
81410,0rcu_preempt13927-21ssh22:57:531
81410,0rcu_preempt0-21swapper/120:37:461
81400,0rcu_preempt2633-21ssh23:52:571
81400,0rcu_preempt21945-21ls00:12:561
81400,0rcu_preempt19603-21apt-get20:17:461
81400,0rcu_preempt19-21ksoftirqd/123:37:531
81400,0rcu_preempt19-21ksoftirqd/122:17:491
81400,0rcu_preempt19-21ksoftirqd/120:42:571
81400,0rcu_preempt19-21ksoftirqd/119:22:571
81400,0rcu_preempt19-21ksoftirqd/119:12:531
81400,0rcu_preempt19-21ksoftirqd/100:27:421
81400,0rcu_preempt17622-21users22:28:061
81400,0rcu_preempt12640-21ping20:12:531
81390,0rcu_preempt19-21ksoftirqd/121:47:541
81390,0rcu_preempt19-21ksoftirqd/120:52:441
81390,0rcu_preempt19-21ksoftirqd/120:52:441
81390,0rcu_preempt19-21ksoftirqd/120:32:431
81390,0rcu_preempt19-21ksoftirqd/120:02:471
81390,0rcu_preempt1729-21kworker/0:219:36:080
10050390,0irq/346-484840021518-21ssh22:32:511
81380,0rcu_preempt3-21ksoftirqd/019:57:250
81380,0rcu_preempt19-21ksoftirqd/120:57:441
81380,0rcu_preempt19-21ksoftirqd/119:57:531
81380,0rcu_preempt19-21ksoftirqd/119:47:451
81370,0rcu_preempt3-21ksoftirqd/020:27:520
81370,0rcu_preempt19-21ksoftirqd/119:07:331
81360,0rcu_preempt3-21ksoftirqd/020:00:160
81360,0rcu_preempt19-21ksoftirqd/121:02:471
81360,0rcu_preempt19-21ksoftirqd/119:02:561
81350,0rcu_preempt19-21ksoftirqd/120:47:331
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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