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2026-03-28 - 21:49

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 28, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811340,0rcu_preempt3-21ksoftirqd/011:19:060
81740,0rcu_preempt3-21ksoftirqd/009:38:430
81740,0rcu_preempt3-21ksoftirqd/009:14:020
10050720,0irq/346-484840054-21kswapd012:26:530
10050720,0irq/346-4848400181ktimersoftd/111:39:361
81710,0rcu_preempt16118-21php-cgi11:59:020
10050710,0irq/346-4848400181ktimersoftd/110:43:111
81700,0rcu_preempt19-21ksoftirqd/108:23:031
81690,0rcu_preempt3-21ksoftirqd/010:30:450
4350680,0irq/32-4330000025900-21dropbear12:09:000
10050680,0irq/346-4848400181ktimersoftd/110:24:051
10050670,0irq/346-484840019-21ksoftirqd/112:34:521
81650,0rcu_preempt54-21kswapd010:04:130
10050650,0irq/346-484840019-21ksoftirqd/109:49:491
81630,0rcu_preempt3-21ksoftirqd/010:51:310
10050630,0irq/346-4848400171rcuc/110:44:121
81620,0rcu_preempt3-21ksoftirqd/011:37:250
81620,0rcu_preempt3-21ksoftirqd/009:48:560
10050620,0irq/346-48484001792-21ssh10:39:030
10050620,0irq/346-4848400171rcuc/109:28:081
10050620,0irq/346-484840015151-1kworker/0:1H12:30:230
81610,0rcu_preempt9045-21kworker/1:110:18:431
81610,0rcu_preempt3-21ksoftirqd/011:12:040
81610,0rcu_preempt3-21ksoftirqd/009:42:140
10050610,0irq/346-484840031417-21runrttasks10:03:430
10050610,0irq/346-4848400171rcuc/112:19:461
10050610,0irq/346-4848400171rcuc/109:41:211
81600,0rcu_preempt3-21ksoftirqd/009:25:120
81600,0rcu_preempt19-21ksoftirqd/112:31:081
81600,0rcu_preempt19-21ksoftirqd/112:08:491
81600,0rcu_preempt19-21ksoftirqd/109:54:541
10050600,0irq/346-484840022770-1kworker/0:0H12:06:170
10050600,0irq/346-4848400171rcuc/110:10:081
9950590,0irq/345-4848400171rcuc/110:34:051
81590,0rcu_preempt3-21ksoftirqd/012:36:130
81590,0rcu_preempt3-21ksoftirqd/010:53:580
81590,0rcu_preempt19-21ksoftirqd/111:11:221
81590,0rcu_preempt19-21ksoftirqd/109:45:291
10050590,0irq/346-484840082112sleep111:18:331
10050590,0irq/346-484840022071-1kworker/1:3H09:23:241
10050590,0irq/346-4848400181ktimersoftd/111:28:091
10050590,0irq/346-4848400181ktimersoftd/109:30:131
10050590,0irq/346-4848400171rcuc/110:21:531
10050590,0irq/346-4848400171rcuc/109:59:001
9950580,0irq/345-48484005159-21ps10:09:130
81580,0rcu_preempt3-21ksoftirqd/011:55:550
81580,0rcu_preempt3-21ksoftirqd/010:22:250
10050580,0irq/346-484840023266-21rm10:28:070
10050580,0irq/346-48484001955-21ssh12:17:330
10050580,0irq/346-4848400171rcuc/111:04:171
10050580,0irq/346-4848400171rcuc/109:08:491
10050580,0irq/346-484840016885-1kworker/0:0H07:54:140
10050580,0irq/346-484840016311-1kworker/0:0H11:40:490
10050580,0irq/346-48484000-21swapper/010:33:530
81570,0rcu_preempt3-21ksoftirqd/009:57:510
81570,0rcu_preempt19-21ksoftirqd/110:33:141
81570,0rcu_preempt19-21ksoftirqd/107:29:181
10050570,0irq/346-4848400171rcuc/110:51:581
9950560,0irq/345-4848400171rcuc/111:01:301
81560,0rcu_preempt3-21ksoftirqd/012:20:310
81560,0rcu_preempt19-21ksoftirqd/111:19:491
10050560,0irq/346-484840054-21kswapd011:47:331
10050560,0irq/346-4848400171rcuc/110:54:091
10050560,0irq/346-4848400171rcuc/109:36:161
9950550,0irq/345-48484003-21ksoftirqd/011:49:420
9950550,0irq/345-4848400181ktimersoftd/111:57:321
9950550,0irq/345-484840017824-1kworker/1:2H12:02:251
81550,0rcu_preempt3-21ksoftirqd/009:31:190
10050550,0irq/346-4848400171rcuc/111:52:161
10050550,0irq/346-4848400171rcuc/109:16:561
10050550,0irq/346-484840014034-1kworker/0:3H11:02:380
10050550,0irq/346-48484000-21swapper/010:44:090
81540,0rcu_preempt19-21ksoftirqd/108:28:021
10050540,0irq/346-48484004523-1kworker/0:1H09:44:200
10050540,0irq/346-484840011478-21ssh10:15:400
10050540,0irq/346-48484000-21swapper/011:48:080
81530,0rcu_preempt24240-21kworker/0:207:04:100
81530,0rcu_preempt24240-21kworker/0:207:04:100
10050530,0irq/346-48484009179-21wget07:29:010
10050530,0irq/346-484840020758-21apt-get12:03:581
10050530,0irq/346-4848400171rcuc/111:37:491
10050530,0irq/346-48484000-21swapper/011:31:380
10050530,0irq/346-48484000-21swapper/011:31:380
9950520,0irq/345-4848400171rcuc/107:10:301
81520,0rcu_preempt3-21ksoftirqd/007:59:060
81520,0rcu_preempt19-21ksoftirqd/107:59:131
10050520,0irq/346-484840015710-21ssh11:25:230
10050520,0irq/346-48484000-21swapper/011:05:070
81510,0rcu_preempt19-21ksoftirqd/108:09:081
10050510,0irq/346-484840022283-21ssh09:21:080
9950500,0irq/345-484840012127-1kworker/0:1H09:12:430
81500,0rcu_preempt3-21ksoftirqd/009:04:030
81500,0rcu_preempt19-21ksoftirqd/112:26:571
10050500,0irq/346-484840027056-21idleruntime-cro08:23:470
81490,0rcu_preempt3-21ksoftirqd/011:14:480
81490,0rcu_preempt18790-21ping08:04:040
81480,0rcu_preempt31764-21kworker/0:108:48:460
81480,0rcu_preempt31764-21kworker/0:108:48:460
10050480,0irq/346-484840015247-1kworker/0:2H07:49:110
81470,0rcu_preempt3-21ksoftirqd/008:34:030
81470,0rcu_preempt3-21ksoftirqd/008:24:010
81470,0rcu_preempt3-21ksoftirqd/008:13:470
81470,0rcu_preempt19-21ksoftirqd/112:14:151
81470,0rcu_preempt18790-21ping08:14:030
242899473,0cyclictest0-21swapper/107:19:041
81460,0rcu_preempt3-21ksoftirqd/008:40:110
81460,0rcu_preempt3-21ksoftirqd/007:43:560
81460,0rcu_preempt19-21ksoftirqd/110:04:111
81460,0rcu_preempt19-21ksoftirqd/108:14:111
10050460,0irq/346-48484004406-21munin-node0
10050460,0irq/346-48484004406-21munin-node0
81450,0rcu_preempt5709-21ping07:34:431
81450,0rcu_preempt54-21kswapd008:29:131
81450,0rcu_preempt3-21ksoftirqd/008:54:040
81450,0rcu_preempt3-21ksoftirqd/008:49:030
81450,0rcu_preempt19-21ksoftirqd/107:44:511
10050450,0irq/346-4848400887-1kworker/1:1H08:43:471
10050450,0irq/346-48484002573-21munin-node0
81440,0rcu_preempt3-21ksoftirqd/007:19:190
81440,0rcu_preempt3009-21apt-get08:48:581
81440,0rcu_preempt19-21ksoftirqd/107:23:541
10050440,0irq/346-484840030320-21cron08:33:470
10050440,0irq/346-484840013914-21munin-run07:43:470
81430,0rcu_preempt3-21ksoftirqd/007:23:590
81430,0rcu_preempt19-21ksoftirqd/108:07:411
242899436,0cyclictest9425-21diskmemload11:33:151
242899436,0cyclictest9425-21diskmemload11:33:151
2428994311,0cyclictest5709-21ping07:38:571
81420,0rcu_preempt3-21ksoftirqd/008:59:160
81420,0rcu_preempt19-21ksoftirqd/109:04:041
81420,0rcu_preempt19-21ksoftirqd/108:54:111
81420,0rcu_preempt19-21ksoftirqd/107:58:351
2428994210,0cyclictest6544-21fschecks_time08:59:041
242899419,0cyclictest4406-21df_inode07:14:021
242899419,0cyclictest4406-21df_inode07:14:021
81400,0rcu_preempt5709-21ping07:33:580
81380,0rcu_preempt19-21ksoftirqd/108:33:561
81380,0rcu_preempt19-21ksoftirqd/107:05:331
81380,0rcu_preempt19-21ksoftirqd/107:05:331
81360,0rcu_preempt19-21ksoftirqd/108:44:011
81360,0rcu_preempt19-21ksoftirqd/108:44:011
81360,0rcu_preempt19-21ksoftirqd/107:52:031
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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