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2026-03-21 - 15:46

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 Mar 21, 2026 12:43:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81790,0rcu_preempt3-21ksoftirqd/010:40:030
10050750,0irq/346-484840018336-21cyclictest09:58:430
81730,0rcu_preempt3-21ksoftirqd/010:04:210
81680,0rcu_preempt54-21kswapd009:21:300
81640,0rcu_preempt1348-21lldpd10:24:261
81620,0rcu_preempt54-21kswapd009:33:590
81620,0rcu_preempt19-21ksoftirqd/110:47:161
81610,0rcu_preempt19-21ksoftirqd/109:35:491
81600,0rcu_preempt19-21ksoftirqd/112:28:561
81600,0rcu_preempt19-21ksoftirqd/111:01:491
81600,0rcu_preempt19-21ksoftirqd/110:22:191
81600,0rcu_preempt16833-21apt-get07:04:040
81590,0rcu_preempt19-21ksoftirqd/112:25:521
81590,0rcu_preempt19-21ksoftirqd/109:54:381
81590,0rcu_preempt19-21ksoftirqd/109:42:371
81590,0rcu_preempt19-21ksoftirqd/109:25:571
81590,0rcu_preempt19-21ksoftirqd/109:19:381
10050590,0irq/346-484840029987-21idleruntime-cro12:33:530
81580,0rcu_preempt3-21ksoftirqd/011:04:570
81580,0rcu_preempt19-21ksoftirqd/110:55:311
81570,0rcu_preempt19-21ksoftirqd/108:03:341
9950560,0irq/345-484840081rcu_preempt10:10:571
10050560,0irq/346-484840020118-1kworker/0:0H11:40:160
10050560,0irq/346-484840020117-1kworker/1:0H11:18:391
81550,0rcu_preempt19-21ksoftirqd/109:48:451
10050550,0irq/346-484840024974-1kworker/0:2H11:24:350
10050550,0irq/346-484840015183-1kworker/1:0H08:39:111
9950540,0irq/345-4848400181ktimersoftd/110:43:361
81540,0rcu_preempt19-21ksoftirqd/112:10:121
81540,0rcu_preempt19-21ksoftirqd/108:04:041
81540,0rcu_preempt0-21swapper/109:59:531
10050540,0irq/346-484840023371-1kworker/0:2H10:47:540
10050540,0irq/346-484840021763-1kworker/1:2H09:14:011
10050540,0irq/346-48484000-21swapper/009:09:320
81530,0rcu_preempt1969-21ping08:24:151
81530,0rcu_preempt19-21ksoftirqd/112:37:381
81520,0rcu_preempt3-21ksoftirqd/012:36:540
81510,0rcu_preempt3-21ksoftirqd/008:21:000
81510,0rcu_preempt19-21ksoftirqd/109:09:181
81510,0rcu_preempt19-21ksoftirqd/108:19:181
9950500,0irq/345-48484000-21swapper/011:55:400
81500,0rcu_preempt25325-21diskmemload11:25:521
81490,0rcu_preempt19-21ksoftirqd/108:08:551
81490,0rcu_preempt19-21ksoftirqd/107:19:211
10050490,0irq/346-484840031098-21ssh10:19:590
10050490,0irq/346-484840020118-1kworker/0:0H11:16:490
10050490,0irq/346-484840017407-1kworker/0:0H10:09:150
10050490,0irq/346-484840015959-21rm12:19:070
9950480,0irq/345-48484000-21swapper/010:35:440
9950480,0irq/345-48484000-21swapper/010:02:150
81480,0rcu_preempt3-21ksoftirqd/008:49:120
81480,0rcu_preempt25325-21diskmemload11:34:171
81480,0rcu_preempt19-21ksoftirqd/111:44:221
81480,0rcu_preempt19-21ksoftirqd/107:24:141
81480,0rcu_preempt0-21swapper/110:14:381
1599480,0migration/013347-21unixbench_singl08:29:190
9950470,0irq/345-484840011307-21ssh12:14:071
81470,0rcu_preempt3-21ksoftirqd/008:54:160
81470,0rcu_preempt3-21ksoftirqd/008:07:010
81470,0rcu_preempt25325-21diskmemload11:59:041
81470,0rcu_preempt19-21ksoftirqd/111:29:121
81470,0rcu_preempt19-21ksoftirqd/111:09:221
81470,0rcu_preempt19-21ksoftirqd/108:14:121
81470,0rcu_preempt19-21ksoftirqd/107:44:291
1599470,0migration/026247-21taskset07:30:540
10050470,0irq/346-48484008347-1kworker/0:1H12:10:390
10050470,0irq/346-484840031089-1kworker/0:1H12:04:130
10050470,0irq/346-484840022279-21rm11:51:440
10050470,0irq/346-48484000-21swapper/010:54:320
10050470,0irq/346-48484000-21swapper/010:49:460
10050470,0irq/346-48484000-21swapper/009:51:090
10050470,0irq/346-48484000-21swapper/009:18:220
9950460,0irq/345-48484007914-21apt-get09:24:060
81460,0rcu_preempt3-21ksoftirqd/009:04:130
81460,0rcu_preempt22846-21ntpq08:59:160
81460,0rcu_preempt19-21ksoftirqd/111:54:101
81460,0rcu_preempt19-21ksoftirqd/111:43:021
81460,0rcu_preempt19-21ksoftirqd/109:52:151
81460,0rcu_preempt19-21ksoftirqd/108:59:081
81460,0rcu_preempt19-21ksoftirqd/108:58:541
81460,0rcu_preempt19-21ksoftirqd/107:55:451
81460,0rcu_preempt19-21ksoftirqd/107:55:451
81460,0rcu_preempt15691-21users11:44:210
9950450,0irq/345-48484000-21swapper/009:45:380
9950450,0irq/345-48484000-21swapper/007:34:160
81450,0rcu_preempt6753-21ssh10:29:051
81450,0rcu_preempt54-21kswapd012:28:430
81450,0rcu_preempt5141-21ssh11:34:090
81450,0rcu_preempt3-21ksoftirqd/008:09:390
81450,0rcu_preempt31822-21entropy07:49:101
81450,0rcu_preempt25325-21diskmemload10:04:121
81450,0rcu_preempt19-21ksoftirqd/111:23:051
81450,0rcu_preempt19-21ksoftirqd/110:49:041
81450,0rcu_preempt19-21ksoftirqd/109:29:221
81450,0rcu_preempt19-21ksoftirqd/107:39:231
81450,0rcu_preempt19-21ksoftirqd/107:34:121
10050450,0irq/346-484840031089-1kworker/0:1H12:01:430
10050450,0irq/346-484840027875-1kworker/0:1H07:39:170
10050450,0irq/346-484840024117-21ssh09:39:450
81440,0rcu_preempt3-21ksoftirqd/007:56:240
81440,0rcu_preempt3-21ksoftirqd/007:56:240
81440,0rcu_preempt25325-21diskmemload10:24:130
81440,0rcu_preempt22744-21ssh11:52:221
81440,0rcu_preempt19-21ksoftirqd/111:04:041
81440,0rcu_preempt19-21ksoftirqd/107:30:211
81440,0rcu_preempt11635-21apt-get10:34:031
10050440,0irq/346-48484009463-1kworker/0:3H10:31:200
10050440,0irq/346-48484008609-1kworker/0:0H08:24:130
10050440,0irq/346-48484004143-21ssh10:59:150
10050440,0irq/346-48484000-21swapper/010:16:210
81430,0rcu_preempt54-21kswapd008:34:161
81430,0rcu_preempt3-21ksoftirqd/011:31:510
81430,0rcu_preempt3-21ksoftirqd/007:09:180
81430,0rcu_preempt13504-21memory09:29:180
10050430,0irq/346-484840010415-1kworker/0:1H11:09:130
10050430,0irq/346-48484000-21swapper/012:15:470
9950420,0irq/345-484840015462-21munin-run08:38:530
81420,0rcu_preempt3-21ksoftirqd/008:15:460
81420,0rcu_preempt19-21ksoftirqd/112:22:551
81420,0rcu_preempt19-21ksoftirqd/112:04:011
81420,0rcu_preempt19-21ksoftirqd/107:14:101
10050420,0irq/346-484840021620-21ping07:44:220
9950410,0irq/345-484840018336-21cyclictest11:19:310
9950410,0irq/345-48484000-21swapper/007:23:540
81410,0rcu_preempt3-21ksoftirqd/007:49:150
81410,0rcu_preempt19-21ksoftirqd/108:29:121
81410,0rcu_preempt19-21ksoftirqd/107:13:471
81400,0rcu_preempt3841-21kworker/0:007:14:060
81400,0rcu_preempt19-21ksoftirqd/107:03:571
10050400,0irq/346-484840016268-21ntpq08:39:180
81390,0rcu_preempt19-21ksoftirqd/109:08:531
1833799392,0cyclictest1969-21ping07:59:110
81380,0rcu_preempt3-21ksoftirqd/008:44:390
81380,0rcu_preempt19-21ksoftirqd/108:49:161
81380,0rcu_preempt19-21ksoftirqd/108:46:481
10050380,0irq/346-484840023416-21munin-node0
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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