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2026-06-08 - 16:01

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 Mon Jun 08, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81940,0rcu_preempt19-21ksoftirqd/111:48:041
81940,0rcu_preempt19-21ksoftirqd/111:48:041
10050900,0irq/346-48484003-21ksoftirqd/009:25:170
81840,0rcu_preempt19-21ksoftirqd/107:27:371
327162670,0chrt10050irq/346-484840008:20:430
9950660,0irq/345-4848400181ktimersoftd/111:22:571
81610,0rcu_preempt19-21ksoftirqd/109:57:011
81610,0rcu_preempt19-21ksoftirqd/109:11:471
81600,0rcu_preempt28470-1kworker/1:1H12:07:351
10050590,0irq/346-484840054-21kswapd010:05:110
81570,0rcu_preempt851-21rngd09:13:530
81570,0rcu_preempt24469-21ping07:57:510
10050560,0irq/346-48484002473-21ssh11:05:110
9950550,0irq/345-48484000-21swapper/011:57:260
81550,0rcu_preempt3-21ksoftirqd/011:22:490
81550,0rcu_preempt3-21ksoftirqd/008:07:480
10050550,0irq/346-48484000-21swapper/011:48:480
10050550,0irq/346-48484000-21swapper/011:48:480
81540,0rcu_preempt3-21ksoftirqd/010:14:490
10050540,0irq/346-484840054-21kswapd011:27:390
10050540,0irq/346-484840054-21kswapd010:44:170
10050540,0irq/346-484840030243-1kworker/0:2H09:57:530
81530,0rcu_preempt3-21ksoftirqd/011:57:550
81530,0rcu_preempt3-21ksoftirqd/010:32:580
81530,0rcu_preempt19-21ksoftirqd/110:02:091
10050530,0irq/346-484840022971-21apt-get12:32:490
10050530,0irq/346-484840022159-21runrttasks10:19:260
10050530,0irq/346-484840018710-21irqstats12:27:590
81520,0rcu_preempt851-21rngd09:50:130
81520,0rcu_preempt3-21ksoftirqd/009:52:560
81520,0rcu_preempt19197-1kworker/0:0H07:43:110
81520,0rcu_preempt0-21swapper/110:29:151
10050520,0irq/346-484840054-21kswapd010:51:460
10050520,0irq/346-484840023186-21ls10:53:060
81510,0rcu_preempt3-21ksoftirqd/012:18:070
81510,0rcu_preempt3-21ksoftirqd/012:18:070
81510,0rcu_preempt3-21ksoftirqd/011:14:580
81510,0rcu_preempt3-21ksoftirqd/010:58:090
81510,0rcu_preempt3-21ksoftirqd/010:12:380
81510,0rcu_preempt29549-21kworker/0:208:16:110
81510,0rcu_preempt19-21ksoftirqd/109:43:021
65802510,0chrt9274-1kworker/0:1H11:09:060
81500,0rcu_preempt3-21ksoftirqd/012:13:030
81500,0rcu_preempt3-21ksoftirqd/010:24:190
81500,0rcu_preempt3-21ksoftirqd/009:17:570
81500,0rcu_preempt3-21ksoftirqd/008:53:010
81500,0rcu_preempt26147-21kworker/1:008:57:561
81500,0rcu_preempt0-21swapper/112:13:001
81500,0rcu_preempt0-21swapper/108:12:561
117392500,0chrt10050irq/346-484840007:17:490
10050500,0irq/346-484840054-21kswapd009:43:250
10050500,0irq/346-484840054-21kswapd009:11:260
10050500,0irq/346-48484000-21swapper/009:35:020
81490,0rcu_preempt3-21ksoftirqd/011:43:070
81490,0rcu_preempt3-21ksoftirqd/011:32:510
81490,0rcu_preempt13436-21meminfo09:37:591
10050490,0irq/346-48484007205-21munin-node0
10050490,0irq/346-484840054-21kswapd012:03:440
10050490,0irq/346-484840031385-1kworker/0:0H11:38:270
81480,0rcu_preempt3-21ksoftirqd/012:08:000
81480,0rcu_preempt3-21ksoftirqd/008:38:000
81480,0rcu_preempt3-21ksoftirqd/008:23:080
81480,0rcu_preempt3-21ksoftirqd/008:02:390
81480,0rcu_preempt3-21ksoftirqd/008:02:390
81480,0rcu_preempt19-21ksoftirqd/108:20:121
10050480,0irq/346-484840054-21kswapd011:17:430
10050480,0irq/346-484840054-21kswapd011:17:430
10050480,0irq/346-48484004302-1kworker/0:0H10:38:510
10050480,0irq/346-484840023200-21sshd07:52:490
9950470,0irq/345-48484000-21swapper/007:29:380
81470,0rcu_preempt54-21kswapd011:02:571
81470,0rcu_preempt3805-21wc08:32:380
81470,0rcu_preempt3-21ksoftirqd/009:38:000
81470,0rcu_preempt3-21ksoftirqd/007:25:410
81470,0rcu_preempt19-21ksoftirqd/112:07:541
81470,0rcu_preempt19-21ksoftirqd/109:33:061
81470,0rcu_preempt19-21ksoftirqd/107:57:491
81470,0rcu_preempt19-21ksoftirqd/107:02:501
81470,0rcu_preempt16123-21kworker/0:007:38:570
81470,0rcu_preempt13787-21apt-get09:02:480
81470,0rcu_preempt0-21swapper/012:24:590
81460,0rcu_preempt3-21ksoftirqd/007:07:590
81460,0rcu_preempt3-21ksoftirqd/007:02:550
81460,0rcu_preempt21472-21ssh11:57:491
81460,0rcu_preempt19-21ksoftirqd/112:28:001
81460,0rcu_preempt19-21ksoftirqd/111:21:461
81460,0rcu_preempt19-21ksoftirqd/111:21:461
81460,0rcu_preempt19-21ksoftirqd/108:09:471
81460,0rcu_preempt19-21ksoftirqd/108:05:251
81460,0rcu_preempt19-21ksoftirqd/108:05:251
81460,0rcu_preempt19-21ksoftirqd/107:42:011
81460,0rcu_preempt11566-21ping07:18:121
10050460,0irq/346-48484000-21swapper/009:29:070
9950450,0irq/345-48484000-21swapper/008:33:040
81450,0rcu_preempt9982-21apt-get10:07:491
81450,0rcu_preempt3-21ksoftirqd/007:49:450
81450,0rcu_preempt3-21ksoftirqd/007:13:030
81450,0rcu_preempt3-21ksoftirqd/007:13:030
81450,0rcu_preempt19-21ksoftirqd/112:23:021
81450,0rcu_preempt19-21ksoftirqd/107:57:391
81450,0rcu_preempt19-21ksoftirqd/107:42:571
81450,0rcu_preempt12149-21apt-get08:57:480
81440,0rcu_preempt3-21ksoftirqd/010:28:010
81440,0rcu_preempt19-21ksoftirqd/111:38:071
81440,0rcu_preempt19-21ksoftirqd/109:32:181
81440,0rcu_preempt19-21ksoftirqd/107:33:591
81430,0rcu_preempt8284-21cyclictest11:31:371
81430,0rcu_preempt3-21ksoftirqd/008:49:090
81430,0rcu_preempt19-21ksoftirqd/112:35:291
81430,0rcu_preempt19-21ksoftirqd/112:17:511
81430,0rcu_preempt19-21ksoftirqd/112:17:511
81430,0rcu_preempt19-21ksoftirqd/111:53:001
81430,0rcu_preempt19-21ksoftirqd/111:09:321
81430,0rcu_preempt19-21ksoftirqd/110:42:501
81430,0rcu_preempt19-21ksoftirqd/110:34:051
81430,0rcu_preempt19-21ksoftirqd/109:12:511
81430,0rcu_preempt19-21ksoftirqd/108:37:551
81430,0rcu_preempt15280-21diskmemload09:48:451
81420,0rcu_preempt19-21ksoftirqd/111:33:061
81420,0rcu_preempt19-21ksoftirqd/111:12:531
81420,0rcu_preempt19-21ksoftirqd/111:02:161
81420,0rcu_preempt19-21ksoftirqd/110:37:571
81420,0rcu_preempt19-21ksoftirqd/110:25:541
81420,0rcu_preempt19-21ksoftirqd/109:23:081
81420,0rcu_preempt19-21ksoftirqd/108:33:501
81420,0rcu_preempt19-21ksoftirqd/108:24:331
81420,0rcu_preempt19-21ksoftirqd/107:07:551
81420,0rcu_preempt15280-21diskmemload10:12:541
81420,0rcu_preempt15280-21diskmemload10:03:071
81410,0rcu_preempt19-21ksoftirqd/109:17:481
81410,0rcu_preempt19-21ksoftirqd/109:02:531
81410,0rcu_preempt11566-21ping07:27:591
81400,0rcu_preempt19-21ksoftirqd/111:45:271
81400,0rcu_preempt19-21ksoftirqd/110:55:571
81400,0rcu_preempt19-21ksoftirqd/110:17:551
10050400,0irq/346-48484000-21swapper/007:33:020
81390,0rcu_preempt19-21ksoftirqd/108:56:301
81390,0rcu_preempt19-21ksoftirqd/108:49:491
81380,0rcu_preempt19-21ksoftirqd/110:47:521
81380,0rcu_preempt19-21ksoftirqd/108:43:011
81380,0rcu_preempt19-21ksoftirqd/108:30:341
81380,0rcu_preempt19-21ksoftirqd/107:17:041
81380,0rcu_preempt19-21ksoftirqd/107:17:041
81370,0rcu_preempt19-21ksoftirqd/107:50:141
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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