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2025-12-11 - 19:50

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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Click on a legend element to toggle display of that core, ctrl-click inverts display, shift-click enables all.

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 Thu Dec 11, 2025 12:43:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811370,0rcu_preempt751-21rngd11:36:151
811340,0rcu_preempt19-21ksoftirqd/111:16:401
811310,0rcu_preempt19-21ksoftirqd/111:29:301
811310,0rcu_preempt19-21ksoftirqd/110:47:521
811290,0rcu_preempt19-21ksoftirqd/110:08:221
811270,0rcu_preempt19-21ksoftirqd/109:34:001
811260,0rcu_preempt19-21ksoftirqd/110:24:251
811220,0rcu_preempt19-21ksoftirqd/110:44:141
811200,0rcu_preempt19-21ksoftirqd/109:38:041
811150,0rcu_preempt0-21swapper/112:14:281
811130,0rcu_preempt19-21ksoftirqd/111:06:581
811080,0rcu_preempt19-21ksoftirqd/107:27:111
811060,0rcu_preempt31365-21kworker/1:110:58:291
811020,0rcu_preempt24658-1kworker/1:1H12:37:561
811020,0rcu_preempt19-21ksoftirqd/111:48:231
81960,0rcu_preempt19-21ksoftirqd/111:23:401
81940,0rcu_preempt0-21swapper/112:05:341
81930,0rcu_preempt19-21ksoftirqd/107:49:381
81910,0rcu_preempt22946-21ssh09:40:411
81910,0rcu_preempt19-21ksoftirqd/109:53:121
81900,0rcu_preempt19-21ksoftirqd/107:29:531
81890,0rcu_preempt19-21ksoftirqd/109:58:211
81850,0rcu_preempt19-21ksoftirqd/108:29:391
81840,0rcu_preempt19-21ksoftirqd/110:09:281
81840,0rcu_preempt19-21ksoftirqd/108:26:441
81830,0rcu_preempt19-21ksoftirqd/107:39:431
81820,0rcu_preempt19-21ksoftirqd/112:29:281
81820,0rcu_preempt19-21ksoftirqd/112:09:411
81810,0rcu_preempt31102-21kworker/1:012:24:521
81810,0rcu_preempt19-21ksoftirqd/112:19:271
81810,0rcu_preempt19-21ksoftirqd/112:19:271
81810,0rcu_preempt19-21ksoftirqd/111:51:121
81800,0rcu_preempt30394-21kworker/1:308:36:171
81800,0rcu_preempt30394-21kworker/1:308:36:171
81800,0rcu_preempt19-21ksoftirqd/109:22:541
81790,0rcu_preempt19-21ksoftirqd/111:24:281
81790,0rcu_preempt19-21ksoftirqd/110:31:251
81790,0rcu_preempt19-21ksoftirqd/110:17:061
81790,0rcu_preempt19-21ksoftirqd/107:44:471
81780,0rcu_preempt19-21ksoftirqd/109:09:461
81780,0rcu_preempt19-21ksoftirqd/108:39:411
81780,0rcu_preempt19-21ksoftirqd/108:15:121
81770,0rcu_preempt19-21ksoftirqd/108:22:501
81770,0rcu_preempt19-21ksoftirqd/108:02:041
81760,0rcu_preempt54-21kswapd007:21:121
81760,0rcu_preempt19-21ksoftirqd/108:13:501
81760,0rcu_preempt19-21ksoftirqd/108:13:501
81750,0rcu_preempt19-21ksoftirqd/107:34:341
10050750,0irq/346-484840041ktimersoftd/009:44:370
81740,0rcu_preempt948-21avahi-daemon09:08:051
81740,0rcu_preempt19-21ksoftirqd/111:39:411
81740,0rcu_preempt19-21ksoftirqd/111:12:431
81740,0rcu_preempt19-21ksoftirqd/111:02:281
81740,0rcu_preempt19-21ksoftirqd/109:24:431
81730,0rcu_preempt19-21ksoftirqd/108:08:191
81730,0rcu_preempt19-21ksoftirqd/107:19:161
81730,0rcu_preempt19-21ksoftirqd/107:09:501
186292730,0chrt10050irq/346-484840008:26:460
81720,0rcu_preempt54-21kswapd008:57:291
81720,0rcu_preempt54-21kswapd008:57:291
81720,0rcu_preempt19-21ksoftirqd/108:44:301
81720,0rcu_preempt19-21ksoftirqd/108:44:301
81710,0rcu_preempt54-21kswapd010:49:411
81710,0rcu_preempt19-21ksoftirqd/110:00:341
81700,0rcu_preempt19-21ksoftirqd/109:19:001
81690,0rcu_preempt19-21ksoftirqd/110:19:221
81690,0rcu_preempt19-21ksoftirqd/109:47:001
81680,0rcu_preempt19-21ksoftirqd/110:39:171
81680,0rcu_preempt19-21ksoftirqd/110:39:171
2507899688,0cyclictest8891-1kworker/0:1H10:06:440
81670,0rcu_preempt19-21ksoftirqd/111:54:391
2507899649,0cyclictest19610-1kworker/0:0H09:37:050
10050640,0irq/346-484840041ktimersoftd/011:30:340
25078996310,0cyclictest4400-21sh11:29:160
2507899622,0cyclictest28348-21ping07:39:280
153582620,0sleep09950irq/345-484840010:14:430
81610,0rcu_preempt3-21ksoftirqd/010:13:590
2507899611,0cyclictest28348-21ping07:34:350
2507899603,0cyclictest0-21swapper/011:16:510
25078996010,0cyclictest32118-21ssh09:54:170
178772600,0sleep09950irq/345-484840011:02:260
2507899598,0cyclictest3-21ksoftirqd/008:12:500
2507899598,0cyclictest3-21ksoftirqd/008:12:500
2507899594,0cyclictest0-21swapper/008:14:300
2507899593,0cyclictest14521-21munin-node0
2507899591,0cyclictest23051-1kworker/0:1H10:26:090
2507899587,0cyclictest0-21swapper/010:39:430
2507899583,0cyclictest751-21rngd10:37:440
2507899583,0cyclictest751-21rngd10:37:440
2507899582,0cyclictest22112-21sshd09:39:440
25078995813,0cyclictest0-21swapper/012:20:140
25078995813,0cyclictest0-21swapper/012:20:140
2507899574,0cyclictest0-21swapper/007:29:170
103572570,0sleep010050irq/346-484840008:00:550
2507899567,0cyclictest18392-21sh12:29:330
2507899562,0cyclictest30614-21egrep12:04:330
10050560,0irq/346-484840013602-21ssh09:28:130
2507899553,0cyclictest4769-21interrupts07:44:440
2507899552,0cyclictest1365-1kworker/0:2H09:59:290
2507899552,0cyclictest10315-21ping08:04:330
2507899552,0cyclictest0-21swapper/010:29:400
2507899552,0cyclictest0-21swapper/010:19:200
2507899552,0cyclictest0-21swapper/007:49:520
25078995515,0cyclictest0-21swapper/011:39:490
25078995512,0cyclictest0-21swapper/008:59:170
25078995512,0cyclictest0-21swapper/008:59:170
2507899543,0cyclictest0-21swapper/011:44:420
2507899543,0cyclictest0-21swapper/010:49:260
2507899542,0cyclictest11356-1kworker/0:2H12:24:300
2507899542,0cyclictest0-21swapper/012:19:140
2507899542,0cyclictest0-21swapper/011:10:020
25078995413,0cyclictest32035-21runrttasks11:22:280
10050540,0irq/346-484840013767-21kworker/0:210:57:080
2507899532,0cyclictest0-21swapper/007:19:210
25078995312,0cyclictest0-21swapper/010:46:510
2507899531,0cyclictest28348-21ping07:29:290
105222530,0sleep09950irq/345-484840011:37:120
2507899523,0cyclictest0-21swapper/009:09:390
2507899522,0cyclictest0-21swapper/008:39:480
2507899521,0cyclictest10315-21ping08:19:190
10050520,0irq/346-484840021474-1kworker/0:3H07:04:380
4350510,0irq/32-433000000-21swapper/009:14:320
2507899514,0cyclictest28371-21sendmail-msp07:19:180
213832510,0chrt9950irq/345-484840011:06:560
2507899502,0cyclictest0-21swapper/008:44:360
2507899502,0cyclictest0-21swapper/008:44:360
2507899498,0cyclictest0-21swapper/008:29:380
2507899492,0cyclictest0-21swapper/011:57:050
10050480,0irq/346-484840026909-21/usr/sbin/munin12:39:170
10050470,0irq/346-484840054-21kswapd012:13:160
10050470,0irq/346-48484000-21swapper/011:49:190
10050450,0irq/346-48484000-21swapper/008:49:340
2507899447,0cyclictest8667-1kworker/0:4H09:21:260
293052430,0sleep09950irq/345-484840009:49:440
266392430,0sleep09950irq/345-484840011:59:190
266392430,0sleep09950irq/345-484840011:59:190
81400,0rcu_preempt8731-1kworker/0:0H07:59:170
81400,0rcu_preempt3-21ksoftirqd/008:35:140
81400,0rcu_preempt3-21ksoftirqd/008:35:140
81400,0rcu_preempt0-21swapper/108:49:371
25078994010,0cyclictest0-21swapper/009:04:490
81380,0rcu_preempt19-21ksoftirqd/112:01:291
81380,0rcu_preempt19-21ksoftirqd/112:01:291
81370,0rcu_preempt3-21ksoftirqd/007:14:170
81370,0rcu_preempt19-21ksoftirqd/107:04:271
13150360,0irq/301-48020000-21swapper/008:59:310
81350,0rcu_preempt19-21ksoftirqd/107:55:221
81340,0rcu_preempt19-21ksoftirqd/108:59:201
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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