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2026-09-28 - 17:10

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 100 highest latencies:
System rackaslot5s.osadl.org (updated Sat Sep 26, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811230,0rcu_preempt19-21ksoftirqd/120:50:251
811130,0rcu_preempt3-21ksoftirqd/021:30:170
811110,0rcu_preempt32128-21ssh21:10:251
811100,0rcu_preempt3-21ksoftirqd/023:55:560
811090,0rcu_preempt19-21ksoftirqd/122:35:591
811090,0rcu_preempt19-21ksoftirqd/121:16:591
81980,0rcu_preempt3-21ksoftirqd/000:36:160
81970,0rcu_preempt3-21ksoftirqd/000:17:000
81960,0rcu_preempt0-21swapper/119:10:151
81920,0rcu_preempt19-21ksoftirqd/122:19:411
81920,0rcu_preempt19-21ksoftirqd/119:40:051
81900,0rcu_preempt758-21rngd21:54:341
81890,0rcu_preempt19-21ksoftirqd/123:43:581
81880,0rcu_preempt19-21ksoftirqd/120:15:091
81880,0rcu_preempt19-21ksoftirqd/120:15:091
81870,0rcu_preempt19-21ksoftirqd/123:35:221
81860,0rcu_preempt2373-21munin-node1
81830,0rcu_preempt19-21ksoftirqd/121:49:391
81810,0rcu_preempt0-21swapper/122:49:471
81790,0rcu_preempt19-21ksoftirqd/121:30:111
81740,0rcu_preempt19-21ksoftirqd/119:31:221
81730,0rcu_preempt3-21ksoftirqd/022:41:360
9950710,0irq/345-484840041ktimersoftd/023:19:300
81710,0rcu_preempt19-21ksoftirqd/121:39:591
2400899682,0cyclictest27285-21ping19:47:100
2400899682,0cyclictest27285-21ping19:47:100
9950670,0irq/345-4848400111rcuc/000:02:390
81670,0rcu_preempt19-21ksoftirqd/122:28:341
9950660,0irq/345-4848400111rcuc/019:20:030
81660,0rcu_preempt758-21rngd23:51:590
81660,0rcu_preempt19-21ksoftirqd/121:42:291
81650,0rcu_preempt19800-21kworker/0:123:45:230
81650,0rcu_preempt19-21ksoftirqd/119:20:021
81650,0rcu_preempt0-21swapper/122:41:021
2400899653,0cyclictest0-21swapper/020:21:560
81640,0rcu_preempt758-21rngd21:27:591
81640,0rcu_preempt19-21ksoftirqd/119:05:231
2400899644,0cyclictest0-21swapper/023:08:000
2400899637,0cyclictest758-21rngd00:27:120
81620,0rcu_preempt19-21ksoftirqd/123:19:081
2400899629,0cyclictest0-21swapper/021:39:580
24008996212,0cyclictest0-21swapper/022:25:120
2400899621,0cyclictest27285-21ping19:40:000
81610,0rcu_preempt3-21ksoftirqd/021:14:220
81610,0rcu_preempt19-21ksoftirqd/123:25:111
81610,0rcu_preempt19-21ksoftirqd/123:10:251
81610,0rcu_preempt19-21ksoftirqd/122:58:481
2400899617,0cyclictest3-21ksoftirqd/000:11:210
2400899612,0cyclictest7791-21ping20:15:120
2400899612,0cyclictest7791-21ping20:15:120
2400899612,0cyclictest15013-1kworker/0:0H22:00:010
2400899611,0cyclictest27285-21ping19:19:590
81600,0rcu_preempt19-21ksoftirqd/123:01:491
81600,0rcu_preempt19-21ksoftirqd/121:23:541
2400899606,0cyclictest15013-1kworker/0:0H22:00:000
2400899606,0cyclictest0-21swapper/022:58:350
2400899601,0cyclictest1247-21snmpd21:40:050
81590,0rcu_preempt3-21ksoftirqd/021:29:320
81590,0rcu_preempt26569-21kworker/0:221:47:160
2400899593,0cyclictest0-21swapper/021:22:150
81580,0rcu_preempt19-21ksoftirqd/123:52:461
2400899582,0cyclictest32492-21ssh00:30:210
2400899582,0cyclictest28493-21aten_rapower_en23:20:110
2400899581,0cyclictest27285-21ping19:30:180
81570,0rcu_preempt19-21ksoftirqd/123:05:181
81570,0rcu_preempt19-21ksoftirqd/120:09:411
2400899578,0cyclictest0-21swapper/021:54:030
2400899577,0cyclictest15013-1kworker/0:0H22:05:080
2400899577,0cyclictest10050irq/346-484840022:10:090
2400899573,0cyclictest0-21swapper/023:01:110
24008995715,0cyclictest28409-21ssh22:46:030
2400899569,0cyclictest0-21swapper/000:24:000
2400899564,0cyclictest0-21swapper/023:11:150
2400899563,0cyclictest0-21swapper/021:17:310
2400899561,0cyclictest19586-21ssh22:37:170
24008995610,0cyclictest27285-21ping19:41:130
2400899556,0cyclictest1257-21lldpd23:27:480
2400899551,0cyclictest27285-21ping19:25:110
81540,0rcu_preempt3165-21kworker/0:223:30:220
81540,0rcu_preempt3165-21kworker/0:223:30:220
81540,0rcu_preempt19-21ksoftirqd/120:20:441
81540,0rcu_preempt19-21ksoftirqd/119:39:591
2400899543,0cyclictest0-21swapper/022:33:110
2400899537,0cyclictest17495-1kworker/0:0H20:31:170
2400899536,0cyclictest9950irq/345-484840022:18:040
81520,0rcu_preempt3-21ksoftirqd/020:25:180
81520,0rcu_preempt23016-21ssh23:47:191
81520,0rcu_preempt19-21ksoftirqd/120:00:211
81520,0rcu_preempt19-21ksoftirqd/120:00:211
2400899527,0cyclictest9950irq/345-484840022:54:580
2400899526,0cyclictest9950irq/345-484840023:41:150
81510,0rcu_preempt3-21ksoftirqd/020:12:590
81510,0rcu_preempt22500-21apt-get19:05:080
81510,0rcu_preempt19-21ksoftirqd/120:45:101
2400899512,0cyclictest0-21swapper/022:24:020
81500,0rcu_preempt3-21ksoftirqd/000:09:020
81500,0rcu_preempt19-21ksoftirqd/123:22:391
81500,0rcu_preempt19-21ksoftirqd/100:36:491
2400899509,0cyclictest797150kworker/0:0H23:35:190
81490,0rcu_preempt3-21ksoftirqd/019:10:200
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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