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2026-07-15 - 22:19

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 Wed Jul 15, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811120,0rcu_preempt19-21ksoftirqd/110:27:261
811050,0rcu_preempt3-21ksoftirqd/009:47:490
811050,0rcu_preempt19-21ksoftirqd/110:17:391
811010,0rcu_preempt3-21ksoftirqd/010:22:330
81980,0rcu_preempt19-21ksoftirqd/108:12:221
81930,0rcu_preempt19-21ksoftirqd/110:37:211
10050890,0irq/346-48484003-21ksoftirqd/010:12:230
81860,0rcu_preempt54-21kswapd011:45:141
81850,0rcu_preempt31846-21ping07:57:130
81780,0rcu_preempt3-21ksoftirqd/010:54:240
81770,0rcu_preempt19-21ksoftirqd/109:08:031
9950740,0irq/345-4848400381-21munin-node0
81740,0rcu_preempt3-21ksoftirqd/010:42:210
81740,0rcu_preempt19-21ksoftirqd/110:07:251
81740,0rcu_preempt19-21ksoftirqd/110:07:251
81730,0rcu_preempt54-21kswapd010:50:081
10050730,0irq/346-484840041ktimersoftd/011:24:520
81720,0rcu_preempt54-21kswapd011:36:241
81720,0rcu_preempt3-21ksoftirqd/011:34:250
81720,0rcu_preempt3-21ksoftirqd/010:21:330
9950710,0irq/345-484840022676-21diskmemload11:13:420
81700,0rcu_preempt19-21ksoftirqd/109:56:301
81690,0rcu_preempt3-21ksoftirqd/009:54:510
10050690,0irq/346-48484000-21swapper/011:21:490
81680,0rcu_preempt19-21ksoftirqd/112:24:421
9950660,0irq/345-48484008670-21apt-get11:37:130
10050660,0irq/346-48484000-21swapper/012:11:180
10050660,0irq/346-48484000-21swapper/012:11:180
10050660,0irq/346-48484000-21swapper/009:36:300
9950650,0irq/345-48484000-21swapper/009:27:160
9950640,0irq/345-48484000-21swapper/009:10:470
10050640,0irq/346-48484000-21swapper/009:43:550
9950630,0irq/345-48484000-21swapper/011:49:200
81630,0rcu_preempt851-21rngd10:58:160
81630,0rcu_preempt3-21ksoftirqd/011:08:400
81630,0rcu_preempt19-21ksoftirqd/112:30:321
10050630,0irq/346-484840015670-21cyclictest12:36:170
10050630,0irq/346-48484000-21swapper/010:50:260
9950620,0irq/345-48484000-21swapper/010:01:260
10050620,0irq/346-484840054-21kswapd010:32:210
10050620,0irq/346-484840010132-21ssh11:05:370
81610,0rcu_preempt19-21ksoftirqd/109:21:021
9950600,0irq/345-48484000-21swapper/012:30:110
9950600,0irq/345-48484000-21swapper/009:16:400
81600,0rcu_preempt19-21ksoftirqd/110:59:501
81600,0rcu_preempt19-21ksoftirqd/109:57:281
9950590,0irq/345-48484000-21swapper/011:54:160
81580,0rcu_preempt19-21ksoftirqd/112:02:411
81570,0rcu_preempt19-21ksoftirqd/108:21:541
10050570,0irq/346-48484000-21swapper/012:19:450
81560,0rcu_preempt3-21ksoftirqd/008:57:190
81560,0rcu_preempt28601-21kworker/0:010:30:510
81560,0rcu_preempt19-21ksoftirqd/108:22:141
81560,0rcu_preempt0-21swapper/109:45:551
10050560,0irq/346-484840054-21kswapd012:12:130
81550,0rcu_preempt19-21ksoftirqd/112:07:131
81550,0rcu_preempt19-21ksoftirqd/112:07:131
81550,0rcu_preempt19-21ksoftirqd/110:32:131
81550,0rcu_preempt19-21ksoftirqd/109:30:451
81540,0rcu_preempt3-21ksoftirqd/012:22:150
81540,0rcu_preempt19-21ksoftirqd/111:07:291
81540,0rcu_preempt19-21ksoftirqd/107:02:211
81530,0rcu_preempt54-21kswapd011:12:131
81530,0rcu_preempt54-21kswapd009:02:160
81530,0rcu_preempt3-21ksoftirqd/011:44:460
81520,0rcu_preempt12127-21latency_hist10:02:020
10050520,0irq/346-48484005677-21fw_packets09:22:190
81510,0rcu_preempt3-21ksoftirqd/011:57:140
81510,0rcu_preempt3-21ksoftirqd/011:57:140
81510,0rcu_preempt3-21ksoftirqd/010:09:300
81510,0rcu_preempt3-21ksoftirqd/010:09:300
81510,0rcu_preempt3-21ksoftirqd/008:47:260
81510,0rcu_preempt3-21ksoftirqd/008:37:130
81510,0rcu_preempt3-21ksoftirqd/008:02:030
81510,0rcu_preempt3-21ksoftirqd/007:55:170
81510,0rcu_preempt19-21ksoftirqd/108:02:161
237842510,0chrt10050irq/346-484840007:31:120
10050510,0irq/346-48484004251-21runrttasks12:05:150
10050510,0irq/346-484840017580-1kworker/0:0H09:38:060
81500,0rcu_preempt3-21ksoftirqd/011:27:160
81500,0rcu_preempt3-21ksoftirqd/008:12:490
81500,0rcu_preempt19-21ksoftirqd/111:22:311
81500,0rcu_preempt19-21ksoftirqd/111:17:031
10050500,0irq/346-484840025512-21munin-run07:37:020
81490,0rcu_preempt54-21kswapd011:30:481
81490,0rcu_preempt31846-21ping08:22:020
81490,0rcu_preempt19956-21php-cgi12:21:261
81480,0rcu_preempt3-21ksoftirqd/007:02:210
81480,0rcu_preempt19-21ksoftirqd/108:00:021
81470,0rcu_preempt8163-21kworker/0:008:22:440
81470,0rcu_preempt3-21ksoftirqd/010:37:190
81470,0rcu_preempt3-21ksoftirqd/008:27:150
81470,0rcu_preempt31846-21ping08:07:340
81470,0rcu_preempt19-21ksoftirqd/110:22:141
81470,0rcu_preempt19-21ksoftirqd/109:25:461
81470,0rcu_preempt19-21ksoftirqd/107:22:231
81470,0rcu_preempt18950-21ping07:37:130
81460,0rcu_preempt28948-21apt-get07:47:130
81460,0rcu_preempt28948-21apt-get07:47:130
81460,0rcu_preempt19-21ksoftirqd/108:07:141
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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