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2025-11-28 - 23:09

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 Fri Nov 28, 2025 12:43:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811040,0rcu_preempt3-21ksoftirqd/007:24:500
229632900,0sleep010050irq/346-484840008:00:310
81760,0rcu_preempt19-21ksoftirqd/110:04:441
81760,0rcu_preempt0-21swapper/109:16:181
81750,0rcu_preempt54-21kswapd010:19:131
81730,0rcu_preempt751-21rngd09:13:271
81710,0rcu_preempt19-21ksoftirqd/110:35:421
81710,0rcu_preempt19-21ksoftirqd/107:35:041
81710,0rcu_preempt19-21ksoftirqd/107:35:041
81670,0rcu_preempt19-21ksoftirqd/111:21:441
81670,0rcu_preempt19-21ksoftirqd/110:55:461
81670,0rcu_preempt19-21ksoftirqd/110:00:231
81660,0rcu_preempt19-21ksoftirqd/111:01:271
81660,0rcu_preempt19-21ksoftirqd/110:28:541
81660,0rcu_preempt19-21ksoftirqd/109:59:231
81660,0rcu_preempt0-21swapper/109:43:331
81650,0rcu_preempt19-21ksoftirqd/112:01:451
81650,0rcu_preempt19-21ksoftirqd/111:42:251
81650,0rcu_preempt19-21ksoftirqd/109:49:441
81650,0rcu_preempt19-21ksoftirqd/109:20:031
81610,0rcu_preempt19-21ksoftirqd/112:34:581
81610,0rcu_preempt19-21ksoftirqd/111:17:331
81610,0rcu_preempt19-21ksoftirqd/111:05:491
81610,0rcu_preempt19-21ksoftirqd/110:49:181
81610,0rcu_preempt19-21ksoftirqd/110:22:571
81610,0rcu_preempt19-21ksoftirqd/109:38:381
81610,0rcu_preempt19-21ksoftirqd/109:38:381
81600,0rcu_preempt19-21ksoftirqd/111:55:581
81600,0rcu_preempt19-21ksoftirqd/111:29:581
81600,0rcu_preempt19-21ksoftirqd/109:48:101
81600,0rcu_preempt19-21ksoftirqd/108:54:551
81600,0rcu_preempt19-21ksoftirqd/108:54:551
81590,0rcu_preempt19-21ksoftirqd/111:47:091
81580,0rcu_preempt54-21kswapd012:12:541
81580,0rcu_preempt19-21ksoftirqd/110:32:421
81570,0rcu_preempt19-21ksoftirqd/111:26:541
81570,0rcu_preempt19-21ksoftirqd/111:26:541
81570,0rcu_preempt19-21ksoftirqd/110:13:321
81570,0rcu_preempt19-21ksoftirqd/108:44:511
81570,0rcu_preempt19-21ksoftirqd/108:34:381
109892560,0sleep09950irq/345-484840010:38:410
81550,0rcu_preempt20928-21apt-get12:24:371
10050550,0irq/346-484840017018-1kworker/0:3H10:02:060
81540,0rcu_preempt19-21ksoftirqd/109:26:011
81540,0rcu_preempt19-21ksoftirqd/108:49:491
81540,0rcu_preempt18528-21kworker/0:112:08:560
9950530,0irq/345-4848400181ktimersoftd/108:59:301
81530,0rcu_preempt3-21ksoftirqd/012:33:300
81530,0rcu_preempt3-21ksoftirqd/011:39:280
81530,0rcu_preempt3-21ksoftirqd/009:14:440
63122530,0chrt9950irq/345-484840011:19:330
10050530,0irq/346-484840015810-1kworker/0:2H12:29:100
81520,0rcu_preempt3-21ksoftirqd/008:04:530
81520,0rcu_preempt13116-21kworker/1:112:31:391
316962520,0sleep09950irq/345-484840010:21:580
21682520,0sleep09950irq/345-484840011:59:180
10050520,0irq/346-48484000-21swapper/010:54:570
9950510,0irq/345-48484003131-1kworker/0:2H09:44:420
9950510,0irq/345-4848400181ktimersoftd/111:49:591
81510,0rcu_preempt5349-21cyclictest12:12:210
81510,0rcu_preempt3-21ksoftirqd/010:44:540
81510,0rcu_preempt19-21ksoftirqd/108:14:401
81510,0rcu_preempt0-21swapper/111:36:101
107972510,0sleep09950irq/345-484840009:53:100
81490,0rcu_preempt3-21ksoftirqd/010:14:490
81490,0rcu_preempt3-21ksoftirqd/007:56:490
81490,0rcu_preempt3-21ksoftirqd/007:56:490
81490,0rcu_preempt3-21ksoftirqd/007:10:140
81490,0rcu_preempt32046-21kworker/0:210:59:570
81490,0rcu_preempt27874-21apt-get12:34:420
10050490,0irq/346-484840023640-21ssh10:10:050
10050490,0irq/346-484840018548-21unixbench_singl12:20:000
81480,0rcu_preempt3-21ksoftirqd/009:39:570
81480,0rcu_preempt3-21ksoftirqd/009:11:270
81480,0rcu_preempt3-21ksoftirqd/007:49:430
81480,0rcu_preempt1933-21kworker/0:111:14:480
81480,0rcu_preempt19-21ksoftirqd/110:39:501
81480,0rcu_preempt19-21ksoftirqd/107:30:071
101132480,0sleep09950irq/345-484840007:22:540
10050480,0irq/346-484840024066-21ssh11:44:330
81470,0rcu_preempt3-21ksoftirqd/011:29:550
81470,0rcu_preempt3-21ksoftirqd/008:12:520
81470,0rcu_preempt19-21ksoftirqd/111:09:401
81470,0rcu_preempt19-21ksoftirqd/108:39:481
81470,0rcu_preempt19-21ksoftirqd/108:24:551
81470,0rcu_preempt19-21ksoftirqd/108:20:581
81470,0rcu_preempt19-21ksoftirqd/108:20:581
81470,0rcu_preempt18528-21kworker/0:112:14:340
10050470,0irq/346-48484000-21swapper/011:06:300
10050470,0irq/346-48484000-21swapper/009:29:240
81460,0rcu_preempt3-21ksoftirqd/010:30:310
81460,0rcu_preempt3-21ksoftirqd/010:24:430
81460,0rcu_preempt3-21ksoftirqd/009:20:360
81460,0rcu_preempt3-21ksoftirqd/008:19:520
81460,0rcu_preempt3-21ksoftirqd/008:19:520
81460,0rcu_preempt3-21ksoftirqd/008:16:080
81460,0rcu_preempt19-21ksoftirqd/109:04:411
81460,0rcu_preempt19-21ksoftirqd/107:54:451
81460,0rcu_preempt19-21ksoftirqd/107:54:451
81460,0rcu_preempt19-21ksoftirqd/107:26:201
10050460,0irq/346-48484008624-21ping07:39:310
10050460,0irq/346-48484008624-21ping07:39:300
10050460,0irq/346-48484008624-21ping07:39:300
10050460,0irq/346-484840029569-1kworker/0:3H08:24:570
81450,0rcu_preempt7129-21apt-get07:14:381
81450,0rcu_preempt3-21ksoftirqd/011:26:150
81450,0rcu_preempt3-21ksoftirqd/011:26:150
81450,0rcu_preempt3-21ksoftirqd/011:09:460
81450,0rcu_preempt3-21ksoftirqd/010:04:550
81450,0rcu_preempt3-21ksoftirqd/009:37:470
81450,0rcu_preempt3-21ksoftirqd/009:37:470
81450,0rcu_preempt26970-21kworker/1:107:59:311
81450,0rcu_preempt19-21ksoftirqd/112:04:421
81450,0rcu_preempt19-21ksoftirqd/110:53:231
81450,0rcu_preempt19-21ksoftirqd/107:44:531
10050450,0irq/346-48484007000-1kworker/0:0H08:55:310
10050450,0irq/346-48484007000-1kworker/0:0H08:55:310
10050450,0irq/346-48484006479-1kworker/0:0H09:54:500
9950440,0irq/345-484840012139-21if_eth210:39:540
81440,0rcu_preempt4410-21diskstats08:44:440
81440,0rcu_preempt3-21ksoftirqd/011:59:460
81440,0rcu_preempt25688-21kworker/0:109:29:370
81440,0rcu_preempt19-21ksoftirqd/108:09:481
81440,0rcu_preempt19-21ksoftirqd/108:04:551
81440,0rcu_preempt19-21ksoftirqd/107:09:431
10050440,0irq/346-484840018529-1kworker/0:0H11:49:490
10050440,0irq/346-484840018529-1kworker/0:0H11:41:440
10050440,0irq/346-484840010290-1kworker/0:0H09:04:420
10050440,0irq/346-484840010017-1kworker/0:4H07:30:040
81430,0rcu_preempt7712-21memory07:14:540
81430,0rcu_preempt3-21ksoftirqd/007:04:530
81430,0rcu_preempt19-21ksoftirqd/107:39:491
81430,0rcu_preempt19-21ksoftirqd/107:24:021
10050430,0irq/346-4848400370-1kworker/0:1H08:39:450
10050430,0irq/346-484840029569-1kworker/0:3H08:29:440
10050430,0irq/346-484840016968-1kworker/0:0H10:49:330
81420,0rcu_preempt6417-21meminfo08:49:500
81420,0rcu_preempt19-21ksoftirqd/112:19:481
81420,0rcu_preempt19-21ksoftirqd/109:29:451
81420,0rcu_preempt13182-21kworker/0:107:46:280
10050420,0irq/346-48484008637-1kworker/0:3H08:59:420
10050420,0irq/346-4848400370-1kworker/0:1H08:34:500
10050410,0irq/346-484840016459-1kworker/1:1H07:51:561
81400,0rcu_preempt19-21ksoftirqd/112:17:141
81400,0rcu_preempt19-21ksoftirqd/108:29:561
81350,0rcu_preempt19-21ksoftirqd/107:09:271
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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