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2025-12-24 - 17:46

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 Wed Dec 24, 2025 12:43:34)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811630,0rcu_preempt3-21ksoftirqd/010:32:450
811520,0rcu_preempt3-21ksoftirqd/009:27:240
811440,0rcu_preempt10133-21diskmemload10:59:141
811290,0rcu_preempt1001-21thttpd10:41:110
811190,0rcu_preempt3-21ksoftirqd/010:53:420
811030,0rcu_preempt3-21ksoftirqd/010:14:040
811020,0rcu_preempt3-21ksoftirqd/011:50:530
811020,0rcu_preempt3-21ksoftirqd/010:26:040
811010,0rcu_preempt3-21ksoftirqd/011:06:540
10050820,0irq/346-4848400181ktimersoftd/111:30:311
10050820,0irq/346-4848400181ktimersoftd/111:25:131
81800,0rcu_preempt32572-21kworker/0:212:04:210
81800,0rcu_preempt3-21ksoftirqd/011:15:490
81800,0rcu_preempt3-21ksoftirqd/011:15:490
81750,0rcu_preempt3-21ksoftirqd/012:10:110
81740,0rcu_preempt10133-21diskmemload12:02:511
81740,0rcu_preempt10133-21diskmemload09:45:080
81730,0rcu_preempt3-21ksoftirqd/009:23:500
81700,0rcu_preempt3-21ksoftirqd/011:35:350
81670,0rcu_preempt3-21ksoftirqd/009:12:410
81660,0rcu_preempt3-21ksoftirqd/008:25:260
81660,0rcu_preempt3-21ksoftirqd/008:25:260
81660,0rcu_preempt26150-1kworker/0:2H10:45:060
81640,0rcu_preempt3-21ksoftirqd/007:20:350
9950630,0irq/345-4848400181ktimersoftd/110:02:201
81630,0rcu_preempt10133-21diskmemload10:23:011
81620,0rcu_preempt3-21ksoftirqd/008:55:250
81620,0rcu_preempt10133-21diskmemload09:49:001
81610,0rcu_preempt10133-21diskmemload11:45:481
10050610,0irq/346-484840016715-1kworker/0:2H12:22:470
81600,0rcu_preempt3272-21cyclictest08:16:131
81600,0rcu_preempt3-21ksoftirqd/008:11:470
81600,0rcu_preempt24230-1kworker/0:2H08:20:180
81600,0rcu_preempt19-21ksoftirqd/108:10:561
81600,0rcu_preempt10133-21diskmemload11:06:191
10050600,0irq/346-484840021689-21ssh10:35:570
81580,0rcu_preempt3272-21cyclictest08:25:531
81580,0rcu_preempt3272-21cyclictest08:25:531
81580,0rcu_preempt3-21ksoftirqd/007:54:590
81580,0rcu_preempt19-21ksoftirqd/108:08:061
96392570,0sleep010050irq/346-484840007:28:130
81570,0rcu_preempt3-21ksoftirqd/010:04:460
81570,0rcu_preempt19-21ksoftirqd/108:00:341
81560,0rcu_preempt3272-21cyclictest12:25:320
81560,0rcu_preempt3272-21cyclictest12:25:320
81560,0rcu_preempt3-21ksoftirqd/011:55:230
81560,0rcu_preempt3-21ksoftirqd/011:55:230
81560,0rcu_preempt19-21ksoftirqd/108:23:541
10050560,0irq/346-48484003272-21cyclictest11:40:051
81550,0rcu_preempt19-21ksoftirqd/107:58:561
81550,0rcu_preempt10133-21diskmemload11:48:130
112622550,0sleep010050irq/346-484840007:33:090
10050550,0irq/346-48484003143-1kworker/0:3H10:55:480
81540,0rcu_preempt3-21ksoftirqd/011:34:130
261142540,0sleep010050irq/346-484840008:19:310
10050540,0irq/346-48484009520-1kworker/0:1H11:40:240
10050540,0irq/346-484840019629-21munin-run07:59:590
9950530,0irq/345-484840016714-1kworker/1:4H12:28:141
9950530,0irq/345-484840016714-1kworker/1:4H12:28:141
81530,0rcu_preempt3-21ksoftirqd/012:38:190
81530,0rcu_preempt19-21ksoftirqd/109:55:111
81530,0rcu_preempt18902-21munin-run09:19:581
10050530,0irq/346-4848400811-21rngd10:20:020
10050530,0irq/346-484840029692-21ssh09:31:191
10050530,0irq/346-48484002102-1kworker/0:2H09:38:250
10050530,0irq/346-48484002102-1kworker/0:2H09:38:250
196682520,0chrt9950irq/345-484840011:10:350
10050520,0irq/346-484840031214-21basename11:24:580
9950510,0irq/345-4848400811-21rngd10:10:381
81510,0rcu_preempt3-21ksoftirqd/007:45:210
81510,0rcu_preempt15964-21kworker/1:012:15:211
81510,0rcu_preempt10133-21diskmemload11:50:031
81510,0rcu_preempt10133-21diskmemload11:25:090
81510,0rcu_preempt10133-21diskmemload10:17:231
10050510,0irq/346-484840022161-21ssh11:14:281
10050510,0irq/346-484840011146-21runrttasks12:15:220
81500,0rcu_preempt10133-21diskmemload12:21:001
81500,0rcu_preempt10133-21diskmemload12:12:501
81500,0rcu_preempt10133-21diskmemload11:36:181
81500,0rcu_preempt10133-21diskmemload11:19:401
81500,0rcu_preempt10133-21diskmemload11:19:401
81500,0rcu_preempt10133-21diskmemload11:03:541
81500,0rcu_preempt10133-21diskmemload10:40:381
81500,0rcu_preempt10133-21diskmemload10:33:071
81500,0rcu_preempt10133-21diskmemload09:53:351
81500,0rcu_preempt10133-21diskmemload09:40:250
128622500,0sleep010050irq/346-484840007:37:500
10050500,0irq/346-48484009238-1kworker/1:2H10:39:591
10050500,0irq/346-48484004122-21sendmail-msp09:40:021
10050500,0irq/346-48484002382-21ssh12:05:241
10050500,0irq/346-484840021291-1kworker/1:2H09:22:431
10050500,0irq/346-484840020671-1kworker/1:4H11:20:321
10050500,0irq/346-484840016893-1kworker/0:4H09:17:090
10050500,0irq/346-48484000-21swapper/007:10:240
81490,0rcu_preempt10133-21diskmemload12:39:401
81490,0rcu_preempt10133-21diskmemload10:51:491
81490,0rcu_preempt10133-21diskmemload10:06:361
212582490,0sleep010050irq/346-484840008:04:570
10050490,0irq/346-48484006872-21sendmail08:59:581
10050490,0irq/346-484840032198-21ssh10:48:421
10050490,0irq/346-484840027862-21ssh11:57:301
10050490,0irq/346-484840027862-21ssh11:57:301
10050490,0irq/346-48484000-21swapper/012:30:290
81480,0rcu_preempt3-21ksoftirqd/010:15:490
81480,0rcu_preempt3-21ksoftirqd/009:53:350
81480,0rcu_preempt10133-21diskmemload12:34:161
81480,0rcu_preempt10133-21diskmemload09:12:231
10050480,0irq/346-484840025669-21ssh09:26:531
10050480,0irq/346-48484002043-21ssh09:36:501
10050480,0irq/346-48484002043-21ssh09:36:501
81470,0rcu_preempt3-21ksoftirqd/012:08:430
81470,0rcu_preempt17502-21apt-get09:55:100
81470,0rcu_preempt10133-21diskmemload11:01:360
3276994712,0cyclictest0-21swapper/010:06:240
10050470,0irq/346-484840013427-21ssh10:26:441
10050470,0irq/346-484840013098-21sendmail-msp07:40:011
10050460,0irq/346-484840026449-1kworker/0:4H07:05:150
10050460,0irq/346-48484000-21swapper/009:30:260
81450,0rcu_preempt19-21ksoftirqd/107:10:181
10050450,0irq/346-48484009997-21aten_rapower_cu07:30:121
10050450,0irq/346-484840016045-1kworker/1:3H07:50:221
81440,0rcu_preempt15964-21kworker/1:008:44:061
81440,0rcu_preempt15964-21kworker/1:008:39:051
10050440,0irq/346-484840032761-1kworker/0:0H08:39:590
10050440,0irq/346-48484000-21swapper/007:19:590
81430,0rcu_preempt21414-21kworker/0:008:09:020
81430,0rcu_preempt19-21ksoftirqd/109:05:101
81430,0rcu_preempt19-21ksoftirqd/107:25:241
10050430,0irq/346-48484006041-1kworker/1:2H08:59:591
81420,0rcu_preempt19-21ksoftirqd/107:45:111
3278994225,0cyclictest30965-21runrttasks08:33:511
327699421,0cyclictest6543-21ping07:40:100
9950410,0irq/345-48484000-21swapper/107:05:221
81410,0rcu_preempt3-21ksoftirqd/008:30:270
81410,0rcu_preempt28498-21kworker/0:209:05:120
81410,0rcu_preempt19-21ksoftirqd/107:35:181
81410,0rcu_preempt19-21ksoftirqd/107:20:341
10050410,0irq/346-48484005644-1kworker/0:2H09:00:020
10050410,0irq/346-48484004026-21idleruntime08:50:160
10050410,0irq/346-484840027517-1kworker/0:3H08:40:110
81400,0rcu_preempt19-21ksoftirqd/108:48:231
81400,0rcu_preempt19-21ksoftirqd/107:15:091
10050400,0irq/346-484840031076-1kworker/0:1H08:45:130
81390,0rcu_preempt19-21ksoftirqd/108:54:541
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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