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2026-06-08 - 12:22

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 Mon Jun 08, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811170,0rcu_preempt4052-21sort23:07:570
811110,0rcu_preempt25535-21ssh21:50:551
811020,0rcu_preempt3-21ksoftirqd/021:27:380
81990,0rcu_preempt10812-21ssh22:42:001
81950,0rcu_preempt19831-21ssh21:12:361
81930,0rcu_preempt0-21swapper/100:35:551
81910,0rcu_preempt19-21ksoftirqd/122:52:191
81910,0rcu_preempt19-21ksoftirqd/122:52:191
81900,0rcu_preempt54-21kswapd021:57:231
81870,0rcu_preempt19-21ksoftirqd/121:40:561
81850,0rcu_preempt19-21ksoftirqd/123:43:481
81820,0rcu_preempt19-21ksoftirqd/123:59:121
81810,0rcu_preempt3-21ksoftirqd/021:41:500
81800,0rcu_preempt13621-1kworker/0:1H22:47:590
81800,0rcu_preempt13621-1kworker/0:1H22:47:590
81760,0rcu_preempt3-21ksoftirqd/023:54:100
81760,0rcu_preempt19-21ksoftirqd/100:14:301
81760,0rcu_preempt0-21swapper/121:36:241
81760,0rcu_preempt0-21swapper/121:36:241
81740,0rcu_preempt19-21ksoftirqd/123:57:031
81740,0rcu_preempt0-21swapper/121:16:141
81730,0rcu_preempt3-21ksoftirqd/021:12:580
81730,0rcu_preempt19-21ksoftirqd/122:19:401
81730,0rcu_preempt19-21ksoftirqd/122:19:401
81730,0rcu_preempt17234-21kworker/0:223:47:500
81720,0rcu_preempt3-21ksoftirqd/022:32:520
81710,0rcu_preempt19-21ksoftirqd/123:41:161
81710,0rcu_preempt19-21ksoftirqd/122:33:081
81710,0rcu_preempt0-21swapper/122:01:351
81700,0rcu_preempt851-21rngd00:23:251
9950690,0irq/345-484840041ktimersoftd/021:57:480
81690,0rcu_preempt851-21rngd22:28:161
81680,0rcu_preempt19-21ksoftirqd/123:36:541
81680,0rcu_preempt19-21ksoftirqd/119:44:421
81680,0rcu_preempt0-21swapper/122:04:001
81660,0rcu_preempt19111-21kworker/1:200:30:561
81650,0rcu_preempt19-21ksoftirqd/123:52:321
81650,0rcu_preempt19-21ksoftirqd/122:12:281
81650,0rcu_preempt19-21ksoftirqd/122:12:281
81640,0rcu_preempt851-21rngd00:13:570
81640,0rcu_preempt19-21ksoftirqd/121:20:311
7996996411,0cyclictest10050irq/346-484840022:12:500
81630,0rcu_preempt54-21kswapd022:23:481
799699637,0cyclictest12280-1kworker/0:4H23:18:560
81620,0rcu_preempt19-21ksoftirqd/123:08:301
81620,0rcu_preempt19-21ksoftirqd/123:05:021
10050620,0irq/346-4848400130152sleep022:43:250
81610,0rcu_preempt19-21ksoftirqd/123:13:171
81610,0rcu_preempt19-21ksoftirqd/100:18:301
799699612,0cyclictest0-21swapper/019:38:080
81600,0rcu_preempt3-21ksoftirqd/022:29:380
81600,0rcu_preempt19-21ksoftirqd/122:59:301
81600,0rcu_preempt19-21ksoftirqd/122:55:111
81600,0rcu_preempt19-21ksoftirqd/100:09:121
799699602,0cyclictest23532-21runrttasks22:22:020
799699602,0cyclictest23532-21runrttasks22:22:020
7996996015,0cyclictest20392-1kworker/0:1H00:03:020
81590,0rcu_preempt3-21ksoftirqd/000:30:080
81590,0rcu_preempt19-21ksoftirqd/121:28:381
81590,0rcu_preempt19-21ksoftirqd/121:25:271
799699599,0cyclictest10050irq/346-484840023:16:350
799699596,0cyclictest1857650kworker/0:0H23:27:220
81580,0rcu_preempt19-21ksoftirqd/122:16:181
799699582,0cyclictest29664-21ssh20:12:530
799699582,0cyclictest0-21swapper/022:08:540
799699582,0cyclictest0-21swapper/022:08:540
799699582,0cyclictest0-21swapper/000:12:040
799699573,0cyclictest0-21swapper/019:57:380
799699572,0cyclictest11279-21ping19:18:100
799699571,0cyclictest13333-21munin-node0
81560,0rcu_preempt3-21ksoftirqd/021:49:430
81560,0rcu_preempt19-21ksoftirqd/119:07:531
799699563,0cyclictest0-21swapper/021:53:060
799699562,0cyclictest4386-1kworker/0:1H21:32:500
799699562,0cyclictest4386-1kworker/0:1H21:32:500
799699562,0cyclictest0-21swapper/020:02:570
10050560,0irq/346-484840010198-1kworker/0:3H00:22:230
81550,0rcu_preempt24147-21ping20:19:471
799699558,0cyclictest0-21swapper/022:59:410
799699552,0cyclictest7995-21cyclictest21:09:520
799699552,0cyclictest5343-21ssh22:03:030
799699552,0cyclictest20055-1kworker/0:3H00:33:000
799699552,0cyclictest0-21swapper/023:28:030
799699552,0cyclictest0-21swapper/022:52:540
7996995510,0cyclictest24283-21ssh22:22:510
799699545,0cyclictest0-21swapper/023:43:030
799699542,0cyclictest9692-21ssh22:40:320
799699542,0cyclictest2706-21ssh21:27:530
799699542,0cyclictest21591-21munin-node0
799699542,0cyclictest11279-21ping19:27:500
799699542,0cyclictest0-21swapper/021:18:480
81530,0rcu_preempt851-21rngd20:16:371
81530,0rcu_preempt19-21ksoftirqd/120:02:401
799699532,0cyclictest3210-1kworker/0:0H20:32:560
799699532,0cyclictest17275-21munin-node0
799699532,0cyclictest11279-21ping19:22:510
799699532,0cyclictest0-21swapper/023:39:000
799699532,0cyclictest0-21swapper/023:32:440
799699531,0cyclictest16787-21munin-node0
799699531,0cyclictest11279-21ping19:42:500
799699522,0cyclictest588-21idleruntime20:22:580
799699522,0cyclictest21303-21aten_rapower_cu19:47:500
799699522,0cyclictest0-21swapper/023:04:490
7996995211,0cyclictest8000-21latency_hist19:07:380
81510,0rcu_preempt14149-21ssh22:44:541
799699512,0cyclictest11387-21sshd20:54:280
799699512,0cyclictest0-21swapper/020:57:550
7996995114,0cyclictest94562chrt19:10:520
81500,0rcu_preempt24568-21apt-get19:57:500
81500,0rcu_preempt19-21ksoftirqd/123:18:051
81500,0rcu_preempt19-21ksoftirqd/120:37:571
81500,0rcu_preempt19-21ksoftirqd/120:08:041
799699502,0cyclictest24147-21ping20:07:580
7996995012,0cyclictest0-21swapper/020:42:570
7997994910,0cyclictest18829-21munin-node1
799699492,0cyclictest0-21swapper/020:27:590
799699492,0cyclictest0-21swapper/020:22:380
81480,0rcu_preempt19-21ksoftirqd/123:27:581
799799482,0cyclictest17299-21runrttasks21:42:501
799699482,0cyclictest0-21swapper/019:17:390
81470,0rcu_preempt3827-21df_inode20:32:541
81470,0rcu_preempt19-21ksoftirqd/120:52:511
81470,0rcu_preempt19-21ksoftirqd/119:58:051
81470,0rcu_preempt19-21ksoftirqd/119:47:511
81470,0rcu_preempt19-21ksoftirqd/119:27:491
81470,0rcu_preempt19-21ksoftirqd/100:06:501
81460,0rcu_preempt19-21ksoftirqd/120:22:431
81450,0rcu_preempt3-21ksoftirqd/021:02:550
81450,0rcu_preempt3-21ksoftirqd/020:49:050
81450,0rcu_preempt19-21ksoftirqd/119:37:071
81450,0rcu_preempt19-21ksoftirqd/119:17:431
81450,0rcu_preempt11279-21ping19:22:571
7997994511,0cyclictest10794-21unixbench_singl19:13:061
81440,0rcu_preempt19-21ksoftirqd/120:48:041
81440,0rcu_preempt19-21ksoftirqd/120:43:011
81440,0rcu_preempt19-21ksoftirqd/119:57:071
81440,0rcu_preempt19-21ksoftirqd/119:42:271
799799448,0cyclictest13183-21taskset21:00:571
81430,0rcu_preempt3-21ksoftirqd/020:38:050
81420,0rcu_preempt19-21ksoftirqd/119:03:331
81410,0rcu_preempt19-21ksoftirqd/121:03:001
799799411,0cyclictest2497-21sed20:27:591
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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