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2026-06-11 - 17:12

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 Jun 11, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811020,0rcu_preempt19-21ksoftirqd/112:08:041
811010,0rcu_preempt19-21ksoftirqd/110:24:281
81900,0rcu_preempt19-21ksoftirqd/112:30:051
81900,0rcu_preempt19-21ksoftirqd/111:26:571
81850,0rcu_preempt19-21ksoftirqd/110:57:351
81840,0rcu_preempt19-21ksoftirqd/109:07:541
81820,0rcu_preempt19-21ksoftirqd/109:13:481
81810,0rcu_preempt851-21rngd12:07:540
9950800,0irq/345-484840041ktimersoftd/010:41:540
81800,0rcu_preempt19-21ksoftirqd/109:54:261
10050800,0irq/346-4848400111rcuc/011:58:320
81780,0rcu_preempt3-21ksoftirqd/009:36:580
9950770,0irq/345-484840041ktimersoftd/012:20:580
9950770,0irq/345-484840041ktimersoftd/012:20:580
81760,0rcu_preempt19-21ksoftirqd/111:28:031
9950740,0irq/345-484840041ktimersoftd/011:47:510
81740,0rcu_preempt19-21ksoftirqd/109:19:061
9950730,0irq/345-4848400111rcuc/009:52:460
81730,0rcu_preempt19-21ksoftirqd/110:16:031
10050730,0irq/346-4848400111rcuc/011:35:420
41899728,0cyclictest0-21swapper/010:57:480
81710,0rcu_preempt5986-1kworker/1:1H10:46:561
81700,0rcu_preempt3-21ksoftirqd/010:50:050
41899702,0cyclictest17606-21apt-get09:17:450
9950690,0irq/345-484840030415-1kworker/0:1H11:17:510
9950680,0irq/345-484840041ktimersoftd/011:09:050
9950670,0irq/345-484840041ktimersoftd/012:35:010
81670,0rcu_preempt3-21ksoftirqd/011:56:080
81670,0rcu_preempt3-21ksoftirqd/011:56:080
81670,0rcu_preempt19-21ksoftirqd/109:58:381
81670,0rcu_preempt19-21ksoftirqd/109:46:001
81670,0rcu_preempt19-21ksoftirqd/109:31:351
81670,0rcu_preempt19-21ksoftirqd/109:25:401
81660,0rcu_preempt54-21kswapd009:47:570
81650,0rcu_preempt19-21ksoftirqd/112:14:261
81650,0rcu_preempt19-21ksoftirqd/110:52:111
41899651,0cyclictest3758-21ping07:43:040
9950640,0irq/345-48484000-21swapper/009:12:160
9950630,0irq/345-4848400111rcuc/011:46:430
9950630,0irq/345-4848400111rcuc/011:46:430
9950630,0irq/345-48484000-21swapper/009:31:430
9950630,0irq/345-48484000-21swapper/009:26:000
81620,0rcu_preempt19-21ksoftirqd/110:04:451
9950610,0irq/345-4848400851-21rngd09:17:100
9950610,0irq/345-48484000-21swapper/012:15:280
9950610,0irq/345-48484000-21swapper/011:03:410
9950610,0irq/345-48484000-21swapper/010:24:280
81610,0rcu_preempt3-21ksoftirqd/010:42:450
81600,0rcu_preempt19-21ksoftirqd/112:22:041
81600,0rcu_preempt19-21ksoftirqd/112:22:041
69012600,0chrt10050irq/346-484840007:26:060
81590,0rcu_preempt3-21ksoftirqd/011:31:170
81590,0rcu_preempt3-21ksoftirqd/007:47:470
81590,0rcu_preempt19-21ksoftirqd/107:43:091
81580,0rcu_preempt19-21ksoftirqd/111:10:291
81580,0rcu_preempt19-21ksoftirqd/110:40:481
9950560,0irq/345-4848400171rcuc/110:58:061
81560,0rcu_preempt23624-21apt-get08:17:460
81560,0rcu_preempt19-21ksoftirqd/110:22:101
81550,0rcu_preempt3-21ksoftirqd/010:17:550
81550,0rcu_preempt0-21swapper/109:39:491
10050550,0irq/346-48484000-21swapper/011:24:280
81540,0rcu_preempt54-21kswapd012:22:500
81540,0rcu_preempt3-21ksoftirqd/009:58:050
81540,0rcu_preempt19-21ksoftirqd/110:31:051
10050540,0irq/346-484840054-21kswapd009:39:340
81530,0rcu_preempt9861-21apt-get09:42:440
81530,0rcu_preempt3-21ksoftirqd/011:12:510
81530,0rcu_preempt3-21ksoftirqd/010:12:460
81530,0rcu_preempt3-21ksoftirqd/009:03:020
81530,0rcu_preempt1951-21apt-get10:07:451
81520,0rcu_preempt54-21kswapd010:32:550
81520,0rcu_preempt3-21ksoftirqd/010:02:460
81520,0rcu_preempt3-21ksoftirqd/008:02:560
81520,0rcu_preempt3-21ksoftirqd/007:07:500
81520,0rcu_preempt16664-21ping07:58:030
81520,0rcu_preempt0-21swapper/109:36:371
52572520,0chrt10050irq/346-484840007:21:010
81510,0rcu_preempt3-21ksoftirqd/012:32:350
81510,0rcu_preempt3-21ksoftirqd/008:33:000
81510,0rcu_preempt25595-21ntpq11:37:591
81510,0rcu_preempt19-21ksoftirqd/111:32:481
81510,0rcu_preempt19-21ksoftirqd/111:02:551
100922510,0chrt10050irq/346-484840007:35:170
10050510,0irq/346-484840054-21kswapd010:30:000
81500,0rcu_preempt7475-21diskmemload09:51:211
81500,0rcu_preempt3-21ksoftirqd/011:41:470
81500,0rcu_preempt3-21ksoftirqd/010:07:590
81500,0rcu_preempt3-21ksoftirqd/007:02:580
81500,0rcu_preempt19-21ksoftirqd/107:13:071
81490,0rcu_preempt3-21ksoftirqd/012:03:030
81490,0rcu_preempt3-21ksoftirqd/008:22:500
81490,0rcu_preempt26892-21apt-get08:27:460
81490,0rcu_preempt19-21ksoftirqd/111:49:431
81490,0rcu_preempt19-21ksoftirqd/108:00:071
9950480,0irq/345-48484000-21swapper/010:54:240
81480,0rcu_preempt3-21ksoftirqd/008:10:420
81480,0rcu_preempt19-21ksoftirqd/108:22:451
81480,0rcu_preempt15396-21apt-get07:52:460
81470,0rcu_preempt3-21ksoftirqd/008:57:540
81470,0rcu_preempt3-21ksoftirqd/008:13:000
81470,0rcu_preempt19-21ksoftirqd/111:20:331
81470,0rcu_preempt19-21ksoftirqd/108:07:461
81460,0rcu_preempt32030-21diskstats08:42:490
81460,0rcu_preempt19-21ksoftirqd/111:55:431
81460,0rcu_preempt19-21ksoftirqd/111:55:431
81460,0rcu_preempt19-21ksoftirqd/108:17:541
81460,0rcu_preempt19-21ksoftirqd/108:12:441
10050460,0irq/346-48484003758-21ping07:40:520
81450,0rcu_preempt3-21ksoftirqd/008:47:540
81450,0rcu_preempt3-21ksoftirqd/007:12:590
81450,0rcu_preempt19-21ksoftirqd/107:47:521
81450,0rcu_preempt19-21ksoftirqd/107:33:001
81440,0rcu_preempt3-21ksoftirqd/008:38:030
81440,0rcu_preempt31381-21apt-get07:02:451
81440,0rcu_preempt19-21ksoftirqd/112:24:021
81430,0rcu_preempt3758-21ping07:23:051
81430,0rcu_preempt19-21ksoftirqd/111:57:461
81430,0rcu_preempt19-21ksoftirqd/110:34:551
81420,0rcu_preempt19-21ksoftirqd/111:42:461
81420,0rcu_preempt19-21ksoftirqd/111:42:461
81410,0rcu_preempt3-21ksoftirqd/008:57:350
81410,0rcu_preempt28054-1kworker/1:0H08:33:131
81410,0rcu_preempt19-21ksoftirqd/112:32:581
81410,0rcu_preempt19-21ksoftirqd/109:02:471
81410,0rcu_preempt19-21ksoftirqd/108:27:541
81410,0rcu_preempt19-21ksoftirqd/108:03:151
81410,0rcu_preempt19-21ksoftirqd/107:55:231
81410,0rcu_preempt19-21ksoftirqd/107:38:001
41899411,0cyclictest3758-21ping07:27:500
81400,0rcu_preempt19-21ksoftirqd/108:44:551
81400,0rcu_preempt19-21ksoftirqd/108:37:551
81390,0rcu_preempt19-21ksoftirqd/112:03:121
81390,0rcu_preempt19-21ksoftirqd/111:13:211
81390,0rcu_preempt19-21ksoftirqd/109:01:251
81390,0rcu_preempt19-21ksoftirqd/107:28:561
81380,0rcu_preempt19-21ksoftirqd/108:50:221
81380,0rcu_preempt19-21ksoftirqd/107:19:471
81380,0rcu_preempt19-21ksoftirqd/107:11:161
81370,0rcu_preempt19-21ksoftirqd/108:52:441
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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