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2026-06-06 - 09:38

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 100 highest latencies:
System rackaslot5s.osadl.org (updated Sat Jun 06, 2026 00:43:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81980,0rcu_preempt19-21ksoftirqd/123:10:541
81760,0rcu_preempt54-21kswapd023:48:211
81750,0rcu_preempt3-21ksoftirqd/021:55:440
81750,0rcu_preempt19-21ksoftirqd/100:16:091
81740,0rcu_preempt3-21ksoftirqd/022:50:170
81710,0rcu_preempt3-21ksoftirqd/022:02:120
81710,0rcu_preempt19-21ksoftirqd/121:31:511
81710,0rcu_preempt19-21ksoftirqd/121:31:511
81700,0rcu_preempt3-21ksoftirqd/000:33:150
81690,0rcu_preempt3-21ksoftirqd/021:22:120
81680,0rcu_preempt31819-21dropbear23:27:560
81670,0rcu_preempt19-21ksoftirqd/123:21:041
81660,0rcu_preempt19-21ksoftirqd/123:32:411
81650,0rcu_preempt3-21ksoftirqd/023:18:090
81640,0rcu_preempt19-21ksoftirqd/123:16:301
81640,0rcu_preempt19-21ksoftirqd/100:17:481
10050630,0irq/346-484840054-21kswapd021:12:530
81620,0rcu_preempt15169-21cyclictest20:17:410
81610,0rcu_preempt19-21ksoftirqd/120:25:281
81600,0rcu_preempt19-21ksoftirqd/121:14:301
81590,0rcu_preempt3-21ksoftirqd/000:25:250
81590,0rcu_preempt3-21ksoftirqd/000:25:250
81590,0rcu_preempt19-21ksoftirqd/119:23:071
81590,0rcu_preempt15169-21cyclictest20:53:040
9950580,0irq/345-484840028614-1kworker/1:2H00:34:081
81580,0rcu_preempt9711-21meminfo23:38:021
81580,0rcu_preempt9711-21meminfo23:38:021
81580,0rcu_preempt3-21ksoftirqd/019:48:030
81580,0rcu_preempt19-21ksoftirqd/122:58:421
81580,0rcu_preempt19-21ksoftirqd/122:07:301
246402580,0chrt10050irq/346-484840019:33:540
81570,0rcu_preempt3-21ksoftirqd/023:34:020
81570,0rcu_preempt3-21ksoftirqd/020:57:500
81570,0rcu_preempt3-21ksoftirqd/019:58:010
81570,0rcu_preempt19-21ksoftirqd/100:24:121
81570,0rcu_preempt19-21ksoftirqd/100:24:121
81560,0rcu_preempt19-21ksoftirqd/123:05:151
10050560,0irq/346-48484005026-21ssh21:22:530
10050560,0irq/346-48484000-21swapper/022:52:570
81550,0rcu_preempt6350-21kworker/0:022:08:010
81550,0rcu_preempt31348-21ping20:18:100
81550,0rcu_preempt19-21ksoftirqd/100:32:051
81540,0rcu_preempt3-21ksoftirqd/022:27:560
81540,0rcu_preempt3-21ksoftirqd/020:07:520
81540,0rcu_preempt31829-1kworker/0:1H21:51:000
81540,0rcu_preempt30072-21apt-get19:52:500
81540,0rcu_preempt30072-21apt-get19:52:500
81530,0rcu_preempt3-21ksoftirqd/023:48:510
81530,0rcu_preempt3-21ksoftirqd/023:07:540
81530,0rcu_preempt3-21ksoftirqd/020:28:020
81530,0rcu_preempt3-21ksoftirqd/019:12:560
81530,0rcu_preempt3-21ksoftirqd/000:08:040
231572530,0chrt10050irq/346-484840019:30:320
81520,0rcu_preempt3-21ksoftirqd/023:59:030
81520,0rcu_preempt3-21ksoftirqd/022:32:520
81520,0rcu_preempt3-21ksoftirqd/020:03:100
81520,0rcu_preempt19-21ksoftirqd/122:35:261
10050520,0irq/346-48484000-21swapper/021:33:430
81510,0rcu_preempt3-21ksoftirqd/023:53:090
81510,0rcu_preempt3-21ksoftirqd/023:45:030
81510,0rcu_preempt3-21ksoftirqd/022:22:570
81510,0rcu_preempt3-21ksoftirqd/021:43:050
81510,0rcu_preempt19-21ksoftirqd/120:07:581
81510,0rcu_preempt0-21swapper/121:24:251
10050510,0irq/346-48484008785-1kworker/0:0H00:13:030
10050510,0irq/346-484840026604-21apt-get23:22:500
10050510,0irq/346-484840018537-1kworker/0:2H21:08:580
81500,0rcu_preempt3-21ksoftirqd/023:12:580
81500,0rcu_preempt15222-21ps22:38:060
81500,0rcu_preempt10989-21df_inode20:32:550
10050500,0irq/346-484840054-21kswapd023:04:370
10050500,0irq/346-484840054-21kswapd022:20:310
10050500,0irq/346-48484000-21swapper/022:44:310
81490,0rcu_preempt3-21ksoftirqd/023:38:000
81490,0rcu_preempt3-21ksoftirqd/023:38:000
81490,0rcu_preempt3-21ksoftirqd/021:31:240
81490,0rcu_preempt3-21ksoftirqd/021:31:240
81490,0rcu_preempt3-21ksoftirqd/020:23:080
81490,0rcu_preempt3-21ksoftirqd/000:18:100
81490,0rcu_preempt19-21ksoftirqd/122:38:091
81490,0rcu_preempt15736-21apt-get20:47:510
1517099493,0cyclictest27269-21if_eth319:43:070
10050490,0irq/346-48484000-21swapper/021:39:200
81480,0rcu_preempt3875-1kworker/1:0H00:05:321
81480,0rcu_preempt3-21ksoftirqd/023:00:500
81480,0rcu_preempt3-21ksoftirqd/022:04:170
81480,0rcu_preempt3-21ksoftirqd/019:08:050
81480,0rcu_preempt3-21ksoftirqd/019:08:050
81480,0rcu_preempt22153-21diskmemload23:58:031
81480,0rcu_preempt19-21ksoftirqd/120:03:061
81480,0rcu_preempt19-21ksoftirqd/119:58:071
81480,0rcu_preempt19-21ksoftirqd/119:43:101
10050480,0irq/346-48484000-21swapper/000:29:110
9950470,0irq/345-484840026594-21awk22:17:400
81470,0rcu_preempt4226-21apt-get20:12:501
81470,0rcu_preempt16960-21apt-get22:07:501
10050470,0irq/346-484840013612-1kworker/0:0H20:42:570
81460,0rcu_preempt3-21ksoftirqd/000:03:100
81460,0rcu_preempt19-21ksoftirqd/123:23:031
81460,0rcu_preempt19-21ksoftirqd/120:19:231
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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