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2025-11-28 - 15:47

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 Nov 28, 2025 00:43:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81840,0rcu_preempt751-21rngd22:34:551
10050800,0irq/346-4848400111rcuc/022:20:000
81790,0rcu_preempt19-21ksoftirqd/123:53:211
10050790,0irq/346-4848400111rcuc/022:58:330
81780,0rcu_preempt19-21ksoftirqd/121:55:271
81780,0rcu_preempt19-21ksoftirqd/119:19:321
10050780,0irq/346-484840041ktimersoftd/022:33:380
81760,0rcu_preempt29108-21kworker/1:122:21:081
81750,0rcu_preempt751-21rngd21:40:481
81750,0rcu_preempt0-21swapper/023:42:020
81740,0rcu_preempt30668-21ssh21:19:331
81740,0rcu_preempt19-21ksoftirqd/119:39:341
10050730,0irq/346-4848400111rcuc/000:12:580
10050720,0irq/346-4848400111rcuc/023:31:250
81710,0rcu_preempt19-21ksoftirqd/100:29:011
1535799712,0cyclictest31389-21ping19:59:430
10050710,0irq/346-4848400111rcuc/023:54:190
10050710,0irq/346-4848400111rcuc/022:18:410
10050700,0irq/346-4848400111rcuc/021:26:100
81690,0rcu_preempt54-21kswapd023:16:271
81690,0rcu_preempt19-21ksoftirqd/122:55:461
81680,0rcu_preempt19-21ksoftirqd/121:47:381
81680,0rcu_preempt0-21swapper/122:26:051
10050680,0irq/346-4848400111rcuc/021:52:440
81670,0rcu_preempt19-21ksoftirqd/123:33:381
81670,0rcu_preempt19-21ksoftirqd/123:00:431
81670,0rcu_preempt19-21ksoftirqd/122:48:371
81670,0rcu_preempt19-21ksoftirqd/121:28:181
81670,0rcu_preempt0-21swapper/123:46:011
81660,0rcu_preempt3-21ksoftirqd/000:02:060
81660,0rcu_preempt19-21ksoftirqd/123:28:301
81650,0rcu_preempt54-21kswapd023:14:121
81650,0rcu_preempt19-21ksoftirqd/121:35:591
81650,0rcu_preempt19-21ksoftirqd/121:35:591
81650,0rcu_preempt19-21ksoftirqd/121:31:151
81650,0rcu_preempt19-21ksoftirqd/121:31:151
81650,0rcu_preempt19-21ksoftirqd/100:05:591
70962650,0sleep010050irq/346-484840020:20:140
81640,0rcu_preempt3-21ksoftirqd/000:35:520
81640,0rcu_preempt19-21ksoftirqd/122:42:561
81640,0rcu_preempt19-21ksoftirqd/122:10:331
10050640,0irq/346-484840041ktimersoftd/023:06:020
1535799639,0cyclictest24880-1kworker/0:0H19:39:300
1535799632,0cyclictest19100-21latency_hist20:59:300
1535799631,0cyclictest0-21swapper/023:18:320
81620,0rcu_preempt19-21ksoftirqd/123:55:491
81620,0rcu_preempt19-21ksoftirqd/122:52:321
1535799625,0cyclictest31389-21ping20:04:360
1535799623,0cyclictest0-21swapper/021:38:550
1535799623,0cyclictest0-21swapper/021:38:550
81610,0rcu_preempt19-21ksoftirqd/121:52:581
81610,0rcu_preempt19-21ksoftirqd/121:13:491
81610,0rcu_preempt19-21ksoftirqd/100:38:181
1535799614,0cyclictest25527-21taskset21:13:030
81600,0rcu_preempt19-21ksoftirqd/123:21:461
81600,0rcu_preempt19-21ksoftirqd/122:34:071
81600,0rcu_preempt19-21ksoftirqd/122:05:381
81600,0rcu_preempt19-21ksoftirqd/100:31:071
81600,0rcu_preempt19-21ksoftirqd/100:14:341
81600,0rcu_preempt19-21ksoftirqd/100:00:481
15357996012,0cyclictest19995-1kworker/0:0H19:24:530
81590,0rcu_preempt3-21ksoftirqd/022:24:410
81590,0rcu_preempt3-21ksoftirqd/000:29:430
81590,0rcu_preempt19-21ksoftirqd/123:40:071
81590,0rcu_preempt19-21ksoftirqd/123:35:071
55752590,0sleep010050irq/346-484840020:16:430
1535799599,0cyclictest17803-1kworker/0:3H23:01:350
1535799592,0cyclictest18629-21ping19:29:410
1535799592,0cyclictest0-21swapper/023:25:520
1535799591,0cyclictest24880-1kworker/0:0H19:44:500
10050590,0irq/346-484840024797-1kworker/0:3H22:38:260
81580,0rcu_preempt19-21ksoftirqd/122:18:091
81580,0rcu_preempt19-21ksoftirqd/122:01:271
1535799588,0cyclictest0-21swapper/022:05:230
1535799584,0cyclictest0-21swapper/021:54:510
1535799581,0cyclictest18629-21ping19:39:410
15357995810,0cyclictest0-21swapper/020:39:300
81570,0rcu_preempt54-21kswapd000:06:540
1535799572,0cyclictest0-21swapper/022:02:360
1535799571,0cyclictest31389-21ping20:09:540
1535799571,0cyclictest18629-21ping19:19:440
1535799571,0cyclictest0-21swapper/023:19:580
10050570,0irq/346-484840024797-1kworker/0:3H22:12:340
10050570,0irq/346-484840020865-1kworker/0:0H00:28:080
81560,0rcu_preempt3-21ksoftirqd/019:14:410
4232560,0chrt9950irq/345-484840021:21:320
1535799563,0cyclictest0-21swapper/023:56:040
15357995614,0cyclictest17486-21apt-get20:54:410
81550,0rcu_preempt19-21ksoftirqd/121:16:491
1535799557,0cyclictest0-21swapper/021:49:280
1535799554,0cyclictest0-21swapper/019:57:430
1535799552,0cyclictest0-21swapper/022:47:010
15357995513,0cyclictest0-21swapper/022:39:300
1535799551,0cyclictest0-21swapper/021:41:010
10050550,0irq/346-48484000-21swapper/023:48:210
10050540,0irq/346-4848400751-21rngd21:16:490
10050540,0irq/346-484840013433-1kworker/1:0H00:23:511
10050540,0irq/346-48484000-21swapper/021:31:380
10050540,0irq/346-48484000-21swapper/021:31:380
81530,0rcu_preempt3-21ksoftirqd/022:49:410
81530,0rcu_preempt19-21ksoftirqd/120:24:311
81530,0rcu_preempt19-21ksoftirqd/120:04:411
81530,0rcu_preempt19-21ksoftirqd/119:35:571
1535799532,0cyclictest0-21swapper/023:09:310
81520,0rcu_preempt19-21ksoftirqd/123:04:571
1535799522,0cyclictest0-21swapper/023:36:220
81510,0rcu_preempt3-21ksoftirqd/019:49:490
81510,0rcu_preempt3-21ksoftirqd/000:15:160
81510,0rcu_preempt0-21swapper/120:18:361
1535799512,0cyclictest0-21swapper/020:39:330
10050510,0irq/346-48484009540-21ssh00:11:031
10050500,0irq/346-484840015056-1kworker/0:4H19:09:290
81490,0rcu_preempt15504-21apt-get19:09:410
81490,0rcu_preempt15504-21apt-get19:09:410
81480,0rcu_preempt9284-21apt-get20:29:410
81480,0rcu_preempt3-21ksoftirqd/020:44:500
81480,0rcu_preempt31389-21ping20:04:291
81480,0rcu_preempt19-21ksoftirqd/120:34:481
81480,0rcu_preempt15362-21apt-get00:19:420
81470,0rcu_preempt31389-21ping20:24:560
81470,0rcu_preempt19-21ksoftirqd/119:58:281
81470,0rcu_preempt19-21ksoftirqd/119:44:411
10050470,0irq/346-484840010504-1kworker/1:1H20:39:301
81460,0rcu_preempt3-21ksoftirqd/021:06:210
81460,0rcu_preempt19-21ksoftirqd/119:19:291
81450,0rcu_preempt19-21ksoftirqd/119:25:051
81440,0rcu_preempt19-21ksoftirqd/120:49:481
81440,0rcu_preempt19-21ksoftirqd/120:19:311
81440,0rcu_preempt19-21ksoftirqd/119:33:551
81430,0rcu_preempt19-21ksoftirqd/121:00:021
81430,0rcu_preempt19-21ksoftirqd/120:09:551
81420,0rcu_preempt0-21swapper/120:44:401
81410,0rcu_preempt19-21ksoftirqd/121:04:471
81400,0rcu_preempt3-21ksoftirqd/020:49:530
81400,0rcu_preempt19-21ksoftirqd/119:49:551
81400,0rcu_preempt19-21ksoftirqd/119:10:411
81400,0rcu_preempt19-21ksoftirqd/119:10:411
81390,0rcu_preempt19-21ksoftirqd/120:54:511
81380,0rcu_preempt19-21ksoftirqd/120:30:001
81370,0rcu_preempt19-21ksoftirqd/119:09:191
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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