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2026-06-22 - 10:17

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 Mon Jun 22, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81780,0rcu_preempt3-21ksoftirqd/021:42:360
81760,0rcu_preempt15340-21runrttasks21:32:370
81740,0rcu_preempt22760-21diskmemload22:22:480
81740,0rcu_preempt19-21ksoftirqd/119:07:241
10050740,0irq/346-484840015061-1kworker/0:3H00:16:430
10050730,0irq/346-4848400851-21rngd23:17:290
10050720,0irq/346-484840021551-1kworker/0:0H00:33:290
81710,0rcu_preempt9818-21apt-get22:32:360
81710,0rcu_preempt3-21ksoftirqd/019:52:490
10050710,0irq/346-48484004804-1kworker/0:0H23:00:140
10050710,0irq/346-484840027243-1kworker/0:3H22:49:370
10050710,0irq/346-484840017051-1kworker/0:2H23:48:360
81700,0rcu_preempt9420-21apt-get23:37:360
81700,0rcu_preempt3-21ksoftirqd/019:07:440
81690,0rcu_preempt19-21ksoftirqd/119:17:251
81680,0rcu_preempt54-21kswapd000:22:540
1577299683,0cyclictest22019-1kworker/0:2H19:27:460
1577299665,0cyclictest22760-21diskmemload21:15:160
1577299661,0cyclictest0-21swapper/023:34:510
81650,0rcu_preempt3-21ksoftirqd/022:27:420
81650,0rcu_preempt16912-21meminfo20:47:460
1577299659,0cyclictest15061-1kworker/0:3H00:19:510
1577299651,0cyclictest23815-21runrttasks22:13:060
1577299642,0cyclictest0-21swapper/021:29:360
1577299641,0cyclictest7439-21ssh21:23:550
1577299641,0cyclictest7439-21ssh21:23:550
1577299632,0cyclictest0-21swapper/021:17:380
15772996317,0cyclictest0-21swapper/021:57:360
10050630,0irq/346-484840014743-1kworker/0:0H23:13:430
81620,0rcu_preempt3-21ksoftirqd/020:37:460
1577299626,0cyclictest27405-21munin-node0
1577299622,0cyclictest26804-21php-cgi00:27:420
1577299621,0cyclictest32210-1kworker/0:1H22:56:540
81610,0rcu_preempt4252-21kworker/0:120:10:160
81610,0rcu_preempt19-21ksoftirqd/119:18:031
1577299617,0cyclictest21514-1kworker/0:0H22:44:130
1577299614,0cyclictest10029-1kworker/0:0H22:02:260
1577299613,0cyclictest21991-1kworker/0:1H00:07:330
1577299612,0cyclictest9770-1kworker/0:2H23:07:460
1577299611,0cyclictest1817-21apt-get00:02:370
1577299611,0cyclictest1470-21runrttasks22:37:330
81600,0rcu_preempt31975-21ping20:12:480
1577299602,0cyclictest27067-21ssh21:11:370
1577299602,0cyclictest25607-21basename19:37:250
1577299602,0cyclictest0-21swapper/019:12:380
15772996014,0cyclictest0-21swapper/021:37:370
1577299601,0cyclictest0-21swapper/022:10:540
1577299601,0cyclictest0-21swapper/022:10:540
81590,0rcu_preempt3-21ksoftirqd/023:57:440
81590,0rcu_preempt19-21ksoftirqd/123:04:411
1577299592,0cyclictest9096-21ssh23:03:460
1577299592,0cyclictest28240-21ssh23:22:540
1577299592,0cyclictest0-21swapper/021:54:500
1577299592,0cyclictest0-21swapper/021:51:530
10050590,0irq/346-484840024641-1kworker/0:0H23:27:430
81580,0rcu_preempt3-21ksoftirqd/020:57:480
1577299581,0cyclictest28446-21munin-node0
1577299581,0cyclictest14347-21chrt23:42:330
81570,0rcu_preempt3-21ksoftirqd/020:44:480
81570,0rcu_preempt19-21ksoftirqd/121:47:541
1577299573,0cyclictest0-21swapper/020:27:440
1577299572,0cyclictest28579-21taskset23:56:540
1577299572,0cyclictest19223-21apt-get19:17:380
1577299572,0cyclictest19054-21ping19:37:370
1577299572,0cyclictest182912chrt20:52:420
1577299572,0cyclictest0-21swapper/019:57:570
1577299572,0cyclictest0-21swapper/019:22:580
10050570,0irq/346-48484001-21init23:41:351
1577299561,0cyclictest20823-1kworker/0:1H21:02:430
81550,0rcu_preempt19-21ksoftirqd/121:28:521
81550,0rcu_preempt19-21ksoftirqd/119:57:441
1577299552,0cyclictest0-21swapper/020:22:240
81540,0rcu_preempt3-21ksoftirqd/020:32:480
81540,0rcu_preempt19-21ksoftirqd/123:50:541
81540,0rcu_preempt19-21ksoftirqd/122:30:411
10050540,0irq/346-484840054-21kswapd000:12:351
10050540,0irq/346-484840014990-1kworker/1:0H22:05:401
81530,0rcu_preempt2604-21users20:02:551
81530,0rcu_preempt25157-21apt-get21:42:361
1577299532,0cyclictest9600-21cron20:27:240
1577299532,0cyclictest30528-21awk19:52:240
1577299532,0cyclictest30528-21awk19:52:240
1577299531,0cyclictest15771-21cyclictest19:07:240
81520,0rcu_preempt19-21ksoftirqd/119:22:521
10050510,0irq/346-484840016097-21ssh23:43:301
81500,0rcu_preempt19-21ksoftirqd/122:42:361
81500,0rcu_preempt19-21ksoftirqd/122:40:311
81500,0rcu_preempt19-21ksoftirqd/119:57:251
81500,0rcu_preempt19-21ksoftirqd/100:23:031
1577299509,0cyclictest1470-21runrttasks20:07:240
10050500,0irq/346-484840054-21kswapd022:53:061
10050500,0irq/346-484840017527-1kworker/1:3H20:52:251
81490,0rcu_preempt22760-21diskmemload22:37:251
81490,0rcu_preempt19-21ksoftirqd/122:17:581
81490,0rcu_preempt19-21ksoftirqd/120:29:311
10050490,0irq/346-4848400851-21rngd00:04:521
10050490,0irq/346-4848400121432chrt23:07:351
81480,0rcu_preempt19-21ksoftirqd/123:52:361
10050480,0irq/346-484840054-21kswapd023:19:581
81470,0rcu_preempt19-21ksoftirqd/121:35:181
81470,0rcu_preempt18258-21ntpq22:07:491
81470,0rcu_preempt18258-21ntpq22:07:491
10050470,0irq/346-48484008264-21ssh23:36:171
10050470,0irq/346-484840010649-21ssh22:00:171
81460,0rcu_preempt19-21ksoftirqd/120:17:261
81450,0rcu_preempt19-21ksoftirqd/123:57:571
81450,0rcu_preempt19-21ksoftirqd/121:54:161
81450,0rcu_preempt19-21ksoftirqd/120:17:251
81450,0rcu_preempt17651-21timerwakeupswit00:17:521
10050450,0irq/346-48484008099-21ssh21:24:481
10050450,0irq/346-48484008099-21ssh21:24:481
10050450,0irq/346-484840023829-21ssh22:13:071
10050450,0irq/346-48484002190-21ssh22:57:331
10050450,0irq/346-48484002046-21ssh21:18:191
81440,0rcu_preempt31975-21ping20:07:251
81440,0rcu_preempt31951-21ssh23:27:371
81440,0rcu_preempt19-21ksoftirqd/123:12:261
81440,0rcu_preempt19-21ksoftirqd/122:50:331
81440,0rcu_preempt19-21ksoftirqd/122:24:191
81440,0rcu_preempt19-21ksoftirqd/120:27:251
81440,0rcu_preempt19-21ksoftirqd/119:37:511
81440,0rcu_preempt19-21ksoftirqd/119:27:481
81430,0rcu_preempt19-21ksoftirqd/119:42:381
4350430,0irq/32-4330000011567-21dropbear20:32:361
10050430,0irq/346-4848400851-21rngd00:33:481
10050430,0irq/346-484840030692-21ssh23:26:071
81420,0rcu_preempt19-21ksoftirqd/121:37:411
81420,0rcu_preempt19-21ksoftirqd/121:07:291
81420,0rcu_preempt19-21ksoftirqd/121:03:491
81410,0rcu_preempt22760-21diskmemload00:07:481
81410,0rcu_preempt19-21ksoftirqd/121:12:371
81410,0rcu_preempt19-21ksoftirqd/119:47:561
81410,0rcu_preempt19-21ksoftirqd/119:47:561
81410,0rcu_preempt19-21ksoftirqd/119:32:461
81410,0rcu_preempt19-21ksoftirqd/100:29:051
81400,0rcu_preempt19-21ksoftirqd/120:54:241
81390,0rcu_preempt19-21ksoftirqd/120:42:481
81380,0rcu_preempt19-21ksoftirqd/120:57:361
81380,0rcu_preempt19-21ksoftirqd/120:37:491
81380,0rcu_preempt19-21ksoftirqd/119:12:241
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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