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2025-12-26 - 04:05

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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Click on a legend element to toggle display of that core, ctrl-click inverts display, shift-click enables all.

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 Fri Dec 26, 2025 00:43:34)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811010,0rcu_preempt19-21ksoftirqd/123:34:211
81990,0rcu_preempt19-21ksoftirqd/123:29:451
81980,0rcu_preempt31595-21kworker/1:123:19:071
81980,0rcu_preempt19-21ksoftirqd/123:42:081
81970,0rcu_preempt19-21ksoftirqd/121:20:411
81970,0rcu_preempt19-21ksoftirqd/119:25:331
81970,0rcu_preempt19-21ksoftirqd/100:16:151
81960,0rcu_preempt19-21ksoftirqd/121:49:301
81950,0rcu_preempt19-21ksoftirqd/123:54:351
81950,0rcu_preempt19-21ksoftirqd/121:58:121
81930,0rcu_preempt19-21ksoftirqd/123:22:071
81920,0rcu_preempt19-21ksoftirqd/123:05:201
81920,0rcu_preempt19-21ksoftirqd/121:26:301
81920,0rcu_preempt19-21ksoftirqd/121:12:591
81920,0rcu_preempt19-21ksoftirqd/100:02:501
81910,0rcu_preempt19-21ksoftirqd/122:59:461
81910,0rcu_preempt19-21ksoftirqd/122:54:391
81910,0rcu_preempt19-21ksoftirqd/122:33:461
81910,0rcu_preempt19-21ksoftirqd/122:22:181
81910,0rcu_preempt19-21ksoftirqd/100:33:051
81900,0rcu_preempt19-21ksoftirqd/123:55:271
81900,0rcu_preempt19-21ksoftirqd/122:06:141
81900,0rcu_preempt19-21ksoftirqd/122:06:141
81900,0rcu_preempt19-21ksoftirqd/121:32:011
81900,0rcu_preempt19-21ksoftirqd/121:32:011
81890,0rcu_preempt19-21ksoftirqd/123:04:151
81890,0rcu_preempt19-21ksoftirqd/121:44:051
81880,0rcu_preempt3-21ksoftirqd/021:40:590
81880,0rcu_preempt19-21ksoftirqd/122:37:551
81880,0rcu_preempt19-21ksoftirqd/122:27:491
81880,0rcu_preempt19-21ksoftirqd/122:01:001
81860,0rcu_preempt19-21ksoftirqd/100:08:241
81840,0rcu_preempt19-21ksoftirqd/100:12:461
81830,0rcu_preempt19-21ksoftirqd/122:40:071
81830,0rcu_preempt19-21ksoftirqd/100:29:231
81820,0rcu_preempt19-21ksoftirqd/120:10:181
81820,0rcu_preempt19-21ksoftirqd/119:59:591
81810,0rcu_preempt29551-21ping20:27:241
81800,0rcu_preempt19-21ksoftirqd/119:20:391
81800,0rcu_preempt19-21ksoftirqd/100:23:231
81800,0rcu_preempt19-21ksoftirqd/100:23:231
81790,0rcu_preempt19-21ksoftirqd/123:11:461
81780,0rcu_preempt19-21ksoftirqd/121:39:091
81780,0rcu_preempt19-21ksoftirqd/120:58:451
81780,0rcu_preempt12447-21taskset00:37:591
81780,0rcu_preempt12447-21taskset00:37:591
81770,0rcu_preempt19-21ksoftirqd/120:03:581
81760,0rcu_preempt19-21ksoftirqd/119:35:221
81750,0rcu_preempt19-21ksoftirqd/120:18:541
81750,0rcu_preempt19-21ksoftirqd/119:40:191
81740,0rcu_preempt19-21ksoftirqd/122:45:231
81740,0rcu_preempt19-21ksoftirqd/120:20:211
81730,0rcu_preempt19-21ksoftirqd/120:35:111
81730,0rcu_preempt19-21ksoftirqd/120:06:431
81730,0rcu_preempt19-21ksoftirqd/119:45:121
81730,0rcu_preempt19-21ksoftirqd/119:45:121
81710,0rcu_preempt19-21ksoftirqd/123:47:001
81700,0rcu_preempt19-21ksoftirqd/123:37:281
81690,0rcu_preempt19-21ksoftirqd/121:50:211
81650,0rcu_preempt19-21ksoftirqd/121:15:151
81650,0rcu_preempt19-21ksoftirqd/121:00:031
251322650,0sleep010050irq/346-484840019:45:100
251322650,0sleep010050irq/346-484840019:45:100
94882640,0chrt10050irq/346-484840022:45:290
81640,0rcu_preempt3-21ksoftirqd/000:27:220
81640,0rcu_preempt19-21ksoftirqd/120:40:021
276222640,0sleep09950irq/345-484840000:18:570
10050610,0irq/346-48484000-21swapper/000:20:280
10050610,0irq/346-48484000-21swapper/000:20:280
81600,0rcu_preempt3-21ksoftirqd/023:24:120
81600,0rcu_preempt3-21ksoftirqd/022:10:030
81600,0rcu_preempt3-21ksoftirqd/021:32:260
81600,0rcu_preempt3-21ksoftirqd/021:32:260
81590,0rcu_preempt3-21ksoftirqd/023:42:130
81590,0rcu_preempt3-21ksoftirqd/023:27:080
81590,0rcu_preempt3-21ksoftirqd/022:50:030
81590,0rcu_preempt3-21ksoftirqd/000:34:350
81590,0rcu_preempt3-21ksoftirqd/000:06:230
1341199599,0cyclictest29551-21ping20:05:140
81580,0rcu_preempt3-21ksoftirqd/023:36:520
81580,0rcu_preempt3-21ksoftirqd/022:58:020
81580,0rcu_preempt3-21ksoftirqd/021:21:190
81570,0rcu_preempt16668-21ping19:34:340
4350570,0irq/32-4330000015377-21dropbear19:15:131
81560,0rcu_preempt3-21ksoftirqd/023:58:570
81560,0rcu_preempt3-21ksoftirqd/022:34:140
81560,0rcu_preempt3-21ksoftirqd/019:41:490
81560,0rcu_preempt3-21ksoftirqd/000:00:070
81550,0rcu_preempt3-21ksoftirqd/023:06:290
10050550,0irq/346-4848400572-1kworker/0:2H23:15:170
81540,0rcu_preempt0-21swapper/023:33:180
10050540,0irq/346-4848400811-21rngd22:00:560
10050540,0irq/346-4848400811-21rngd21:15:220
10050540,0irq/346-48484001787-1kworker/0:2H22:39:010
1599530,0migration/03205-21diskmemload23:50:480
10050530,0irq/346-4848400811-21rngd21:49:120
10050530,0irq/346-484840030265-1kworker/0:4H00:39:570
10050530,0irq/346-484840030265-1kworker/0:4H00:39:570
81520,0rcu_preempt19-21ksoftirqd/119:10:131
312872520,0sleep010050irq/346-484840020:03:450
10050520,0irq/346-48484005752-1kworker/0:3H23:45:140
10050520,0irq/346-484840021315-1kworker/0:1H00:12:180
10050520,0irq/346-484840011799-1kworker/0:4H20:46:470
10050520,0irq/346-48484000-21swapper/021:36:440
10050510,0irq/346-484840018489-21ssh22:20:030
10050510,0irq/346-484840011873-21ssh22:12:041
81500,0rcu_preempt20269-21diskmemload22:19:001
10050500,0irq/346-4848400811-21rngd21:28:310
10050500,0irq/346-484840026630-1kworker/0:0H21:53:440
10050500,0irq/346-48484000-21swapper/023:10:350
59182490,0sleep010050irq/346-484840020:25:160
10050490,0irq/346-48484007261-1kworker/0:2H22:07:410
10050490,0irq/346-48484007261-1kworker/0:2H22:07:410
1341199489,0cyclictest16668-21ping19:36:400
10050480,0irq/346-484840019634-1kworker/0:0H20:20:200
10050480,0irq/346-484840011798-1kworker/0:3H21:02:210
9950470,0irq/345-484840012335-1kworker/0:0H22:15:090
10050470,0irq/346-484840026630-1kworker/0:0H21:55:300
10050470,0irq/346-484840011797-1kworker/1:4H20:45:191
10050470,0irq/346-48484000-21swapper/022:42:230
10050470,0irq/346-48484000-21swapper/020:39:570
10050460,0irq/346-484840029811-21wc19:59:580
10050460,0irq/346-484840023311-21munin-node0
10050450,0irq/346-484840013410-21cyclictest19:19:570
10050450,0irq/346-48484000-21swapper/021:11:160
81440,0rcu_preempt3-21ksoftirqd/020:30:120
21302440,0sleep010050irq/346-484840020:13:340
10050440,0irq/346-484840019608-1kworker/0:1H23:00:270
10050440,0irq/346-484840018002-1kworker/1:4H19:50:101
10050440,0irq/346-484840015366-21ls20:54:570
10050440,0irq/346-484840013074-1kworker/0:2H19:10:170
9950430,0irq/345-484840016668-21ping19:21:160
10050430,0irq/346-48484006530-1kworker/0:0H19:05:110
10050430,0irq/346-48484001427-21runrttasks20:59:560
81410,0rcu_preempt3-21ksoftirqd/020:42:160
10050410,0irq/346-484840026178-1kworker/0:1H19:50:160
10050410,0irq/346-484840018638-1kworker/0:0H21:05:150
10050400,0irq/346-48484002234-1kworker/0:2H20:15:440
81390,0rcu_preempt16668-21ping19:26:430
81380,0rcu_preempt19-21ksoftirqd/120:30:231
81360,0rcu_preempt19-21ksoftirqd/121:05:271
81350,0rcu_preempt0-21swapper/120:50:171
10050350,0irq/346-484840019633-1kworker/1:0H19:30:141
81340,0rcu_preempt19-21ksoftirqd/119:05:241
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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