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2025-11-22 - 11:46

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 Sat Nov 22, 2025 00:43:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1820021360,0chrt9950irq/345-484840023:59:451
81990,0rcu_preempt19-21ksoftirqd/119:59:341
81910,0rcu_preempt3-21ksoftirqd/000:13:550
81900,0rcu_preempt0-21swapper/020:35:050
81890,0rcu_preempt3-21ksoftirqd/019:45:450
81880,0rcu_preempt3-21ksoftirqd/019:36:130
81860,0rcu_preempt3-21ksoftirqd/019:44:230
10050800,0irq/346-48484007741-1kworker/0:0H23:08:090
81750,0rcu_preempt6808-21diskmemload21:12:491
81730,0rcu_preempt3694-21apt-get20:59:460
81720,0rcu_preempt6808-21diskmemload22:27:471
81720,0rcu_preempt3-21ksoftirqd/020:29:570
10050720,0irq/346-4848400751-21rngd23:19:520
81700,0rcu_preempt3-21ksoftirqd/000:33:250
81670,0rcu_preempt19-21ksoftirqd/122:49:051
81660,0rcu_preempt3-21ksoftirqd/023:52:500
81660,0rcu_preempt19-21ksoftirqd/119:34:481
81650,0rcu_preempt3-21ksoftirqd/021:48:130
81630,0rcu_preempt3-21ksoftirqd/022:49:470
81630,0rcu_preempt3-21ksoftirqd/000:17:580
81620,0rcu_preempt3-21ksoftirqd/020:54:460
81610,0rcu_preempt3-21ksoftirqd/023:14:550
81600,0rcu_preempt3-21ksoftirqd/022:04:550
81600,0rcu_preempt3-21ksoftirqd/000:19:580
9950590,0irq/345-484840019-21ksoftirqd/120:01:271
81590,0rcu_preempt3-21ksoftirqd/021:09:350
81580,0rcu_preempt3-21ksoftirqd/022:24:350
81580,0rcu_preempt3-21ksoftirqd/000:24:440
81570,0rcu_preempt19-21ksoftirqd/123:07:161
81570,0rcu_preempt1069-21kworker/0:121:41:480
81560,0rcu_preempt9189-21meminfo22:29:590
81560,0rcu_preempt3-21ksoftirqd/022:34:460
81560,0rcu_preempt3-21ksoftirqd/020:24:530
32310995612,0cyclictest24268-1kworker/0:0H00:08:260
224802560,0sleep010050irq/346-484840020:16:040
81550,0rcu_preempt3-21ksoftirqd/019:54:440
81550,0rcu_preempt3-21ksoftirqd/000:02:540
32310995515,0cyclictest31239-1kworker/0:1H23:04:110
193832550,0sleep010050irq/346-484840020:07:520
10050550,0irq/346-48484000-21swapper/021:50:530
81540,0rcu_preempt3-21ksoftirqd/022:39:460
81540,0rcu_preempt3-21ksoftirqd/020:45:000
81540,0rcu_preempt3-21ksoftirqd/019:14:460
81540,0rcu_preempt3182-21ping19:19:480
81540,0rcu_preempt19-21ksoftirqd/121:46:031
81540,0rcu_preempt19-21ksoftirqd/121:31:121
32310995412,0cyclictest29039-1kworker/0:0H20:39:470
32310995412,0cyclictest0-21swapper/022:21:150
10050540,0irq/346-4848400751-21rngd21:59:370
10050540,0irq/346-48484000-21swapper/021:56:190
81530,0rcu_preempt3-21ksoftirqd/023:30:030
81530,0rcu_preempt3-21ksoftirqd/022:57:130
81530,0rcu_preempt3-21ksoftirqd/021:14:480
81530,0rcu_preempt20331-1kworker/1:4H00:24:491
81520,0rcu_preempt3-21ksoftirqd/023:49:130
81520,0rcu_preempt3-21ksoftirqd/023:10:490
81520,0rcu_preempt3-21ksoftirqd/021:25:070
81520,0rcu_preempt3-21ksoftirqd/021:25:070
81520,0rcu_preempt28704-21ssh00:12:471
81520,0rcu_preempt19-21ksoftirqd/121:40:391
81520,0rcu_preempt17792-21kworker/0:023:27:420
10050520,0irq/346-484840010537-1kworker/1:4H22:53:301
81510,0rcu_preempt3-21ksoftirqd/021:37:320
81510,0rcu_preempt3-21ksoftirqd/021:20:040
81510,0rcu_preempt3-21ksoftirqd/020:49:580
81510,0rcu_preempt3-21ksoftirqd/019:50:010
4350510,0irq/32-4330000016650-21dropbear19:59:530
32310995112,0cyclictest24681-21sed22:09:530
32310995111,0cyclictest31618-1kworker/0:3H00:37:070
32310995111,0cyclictest31618-1kworker/0:3H00:37:070
10050510,0irq/346-484840024269-1kworker/1:1H00:19:591
9950500,0irq/345-484840019-21ksoftirqd/120:19:351
81500,0rcu_preempt3-21ksoftirqd/023:40:060
81500,0rcu_preempt3-21ksoftirqd/022:45:030
81500,0rcu_preempt3-21ksoftirqd/021:29:580
81500,0rcu_preempt3-21ksoftirqd/020:09:520
81500,0rcu_preempt19-21ksoftirqd/119:05:411
32310995013,0cyclictest3182-21ping19:30:090
10050500,0irq/346-484840021353-1kworker/1:3H21:27:171
10050500,0irq/346-484840021353-1kworker/1:3H21:27:171
10050500,0irq/346-484840013122-1kworker/1:3H21:18:091
10050500,0irq/346-48484000-21swapper/023:35:070
81490,0rcu_preempt6808-21diskmemload22:39:171
81490,0rcu_preempt3-21ksoftirqd/020:24:180
81490,0rcu_preempt19-21ksoftirqd/121:21:571
10050490,0irq/346-48484009579-21ssh21:51:061
10050490,0irq/346-48484003317-1kworker/1:1H23:50:321
81480,0rcu_preempt6808-21diskmemload00:39:091
81480,0rcu_preempt6808-21diskmemload00:39:091
81480,0rcu_preempt6808-21diskmemload00:29:541
81480,0rcu_preempt3-21ksoftirqd/023:54:420
81480,0rcu_preempt3-21ksoftirqd/022:16:020
81480,0rcu_preempt3-21ksoftirqd/022:16:020
81480,0rcu_preempt3-21ksoftirqd/021:09:430
81480,0rcu_preempt19-21ksoftirqd/123:45:391
10050480,0irq/346-48484003199-1kworker/1:1H20:59:351
10050480,0irq/346-484840026752-21ssh22:12:071
10050480,0irq/346-484840017198-1kworker/1:1H23:58:581
81470,0rcu_preempt19-21ksoftirqd/122:04:561
10050470,0irq/346-48484005606-1kworker/1:1H22:15:051
10050470,0irq/346-48484005606-1kworker/1:1H22:15:051
10050470,0irq/346-48484003184-21munin-run19:19:351
10050470,0irq/346-484840028759-1kworker/0:2H19:04:350
10050470,0irq/346-484840021353-1kworker/1:3H21:39:241
10050470,0irq/346-484840018607-21ssh22:40:581
81460,0rcu_preempt3-21ksoftirqd/019:24:520
246542460,0sleep19950irq/345-484840023:27:561
10050460,0irq/346-48484003317-1kworker/1:1H23:40:581
10050460,0irq/346-484840031367-21ssh23:35:111
10050460,0irq/346-484840011364-1kworker/1:2H23:29:471
81450,0rcu_preempt26581-1kworker/1:2H22:23:121
81450,0rcu_preempt19-21ksoftirqd/119:28:301
10050450,0irq/346-484840031238-1kworker/1:0H22:59:351
10050450,0irq/346-484840011714-21ssh23:12:071
10050450,0irq/346-48484000-21swapper/123:19:441
81440,0rcu_preempt6808-21diskmemload22:01:261
81440,0rcu_preempt3-21ksoftirqd/019:09:490
81440,0rcu_preempt30570-21meminfo00:15:001
81440,0rcu_preempt19-21ksoftirqd/121:56:321
81440,0rcu_preempt10537-1kworker/1:4H22:33:031
10050430,0irq/346-484840020852-1kworker/1:1H20:19:371
81420,0rcu_preempt3199-1kworker/1:1H20:59:361
81420,0rcu_preempt19-21ksoftirqd/123:02:511
81420,0rcu_preempt19-21ksoftirqd/119:30:101
81400,0rcu_preempt19-21ksoftirqd/120:40:001
81400,0rcu_preempt19-21ksoftirqd/120:25:001
81400,0rcu_preempt19-21ksoftirqd/119:44:501
81400,0rcu_preempt19-21ksoftirqd/119:19:561
81400,0rcu_preempt19-21ksoftirqd/119:09:431
81400,0rcu_preempt19-21ksoftirqd/100:04:451
10050400,0irq/346-484840011364-1kworker/1:2H23:14:561
81390,0rcu_preempt19-21ksoftirqd/119:40:141
81380,0rcu_preempt19-21ksoftirqd/120:09:571
81360,0rcu_preempt32309-21cyclictest20:34:581
81360,0rcu_preempt19-21ksoftirqd/121:05:001
81360,0rcu_preempt19-21ksoftirqd/120:04:571
81360,0rcu_preempt19-21ksoftirqd/119:49:521
81350,0rcu_preempt19-21ksoftirqd/120:49:341
81340,0rcu_preempt19-21ksoftirqd/120:51:311
81340,0rcu_preempt19-21ksoftirqd/120:34:351
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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