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2026-03-18 - 08:05

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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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 Mar 18, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
10050850,0irq/346-4848400111rcuc/023:13:110
10050780,0irq/346-4848400111rcuc/000:36:400
81770,0rcu_preempt3991-21kworker/0:021:34:070
81740,0rcu_preempt3-21ksoftirqd/022:04:240
81740,0rcu_preempt19-21ksoftirqd/123:44:491
10050740,0irq/346-484840054-21kswapd000:23:060
81720,0rcu_preempt3-21ksoftirqd/000:11:380
81720,0rcu_preempt3-21ksoftirqd/000:11:380
81710,0rcu_preempt11550-1kworker/0:0H23:39:180
26018997110,0cyclictest0-21swapper/022:39:090
81700,0rcu_preempt19-21ksoftirqd/123:14:251
81680,0rcu_preempt3-21ksoftirqd/022:49:180
81680,0rcu_preempt3-21ksoftirqd/019:14:200
81680,0rcu_preempt19-21ksoftirqd/122:46:291
81680,0rcu_preempt19-21ksoftirqd/122:46:291
2601899682,0cyclictest545-21diskmemload23:06:420
81670,0rcu_preempt3-21ksoftirqd/021:59:200
81670,0rcu_preempt19-21ksoftirqd/120:49:181
2601899672,0cyclictest0-21swapper/021:22:260
2601899662,0cyclictest32361-21apt-get22:14:070
2601899662,0cyclictest24714-21taskset21:33:200
26018996610,0cyclictest31323-1kworker/0:3H23:55:450
81650,0rcu_preempt3-21ksoftirqd/022:09:180
81650,0rcu_preempt19-21ksoftirqd/121:34:581
81650,0rcu_preempt19-21ksoftirqd/119:59:341
2601899658,0cyclictest0-21swapper/021:58:030
81640,0rcu_preempt9897-21ps23:29:221
2601899644,0cyclictest0-21swapper/000:01:100
81630,0rcu_preempt19371-21ssh22:33:560
81630,0rcu_preempt19-21ksoftirqd/121:21:401
26018996316,0cyclictest0-21swapper/023:22:290
81620,0rcu_preempt19-21ksoftirqd/121:39:151
2601899627,0cyclictest851-21rngd23:24:130
2601899622,0cyclictest12118-21ssh22:59:110
26018996211,0cyclictest6102-21ssh21:14:120
2601899621,0cyclictest26385-1kworker/0:2H23:48:570
81610,0rcu_preempt3-21ksoftirqd/023:29:200
81610,0rcu_preempt19-21ksoftirqd/100:18:101
2601899611,0cyclictest8779-1kworker/0:2H00:04:470
81600,0rcu_preempt3-21ksoftirqd/021:09:140
81600,0rcu_preempt19-21ksoftirqd/100:38:051
81600,0rcu_preempt0-21swapper/123:34:151
2601899609,0cyclictest7302-1kworker/0:3H22:24:100
2601899606,0cyclictest0-21swapper/019:53:570
2601899602,0cyclictest0-21swapper/023:15:070
2601899601,0cyclictest15432sleep000:26:560
10050600,0irq/346-484840054-21kswapd021:09:171
81590,0rcu_preempt32719-1kworker/0:1H21:44:230
81590,0rcu_preempt3-21ksoftirqd/020:09:210
81590,0rcu_preempt19-21ksoftirqd/123:09:221
81590,0rcu_preempt19-21ksoftirqd/120:18:571
2601899594,0cyclictest29301-21ping19:29:270
2601899592,0cyclictest3913-21if_can019:39:180
2601899592,0cyclictest0-21swapper/023:52:550
2601899592,0cyclictest0-21swapper/023:36:430
2601899592,0cyclictest0-21swapper/019:38:570
10050590,0irq/346-484840054-21kswapd021:46:511
81580,0rcu_preempt9950irq/345-484840000:33:231
81580,0rcu_preempt19-21ksoftirqd/120:29:251
81580,0rcu_preempt19-21ksoftirqd/120:19:141
81580,0rcu_preempt12087-21ssh00:04:241
2601899583,0cyclictest0-21swapper/022:58:410
2601899583,0cyclictest0-21swapper/020:19:130
2601899582,0cyclictest5334-21runrttasks00:30:240
2601899582,0cyclictest22623-21ssh00:15:000
2601899582,0cyclictest0-21swapper/020:29:180
2601899581,0cyclictest29746-21ssh22:44:100
2601899581,0cyclictest29746-21ssh22:44:100
2601899581,0cyclictest11851-21ssh21:53:120
10050580,0irq/346-484840026386-1kworker/1:0H23:57:261
81570,0rcu_preempt3-21ksoftirqd/020:02:110
81570,0rcu_preempt3-21ksoftirqd/019:19:120
2601899571,0cyclictest5638-21munin-node0
10050570,0irq/346-484840017155-1kworker/1:2H22:40:121
81560,0rcu_preempt9659-21ping20:24:230
81560,0rcu_preempt3-21ksoftirqd/020:44:090
81560,0rcu_preempt19-21ksoftirqd/122:35:471
81560,0rcu_preempt0-21swapper/121:28:391
2601899562,0cyclictest29301-21ping19:24:090
2601899562,0cyclictest27359-21munin-node0
2601899562,0cyclictest0-21swapper/022:36:000
2601899562,0cyclictest0-21swapper/022:19:070
2601899562,0cyclictest0-21swapper/021:40:290
81550,0rcu_preempt545-21diskmemload22:09:261
81550,0rcu_preempt54-21kswapd021:54:121
81550,0rcu_preempt19-21ksoftirqd/123:43:491
81550,0rcu_preempt19-21ksoftirqd/100:13:421
81550,0rcu_preempt19-21ksoftirqd/100:13:421
26018995514,0cyclictest15310-21munin-node0
26018995511,0cyclictest0-21swapper/021:26:440
81540,0rcu_preempt19-21ksoftirqd/123:28:561
81540,0rcu_preempt19-21ksoftirqd/122:57:391
81540,0rcu_preempt19-21ksoftirqd/121:30:591
81540,0rcu_preempt19-21ksoftirqd/121:15:491
81540,0rcu_preempt19-21ksoftirqd/100:20:531
2601899542,0cyclictest0-21swapper/021:04:160
81530,0rcu_preempt545-21diskmemload21:59:281
81530,0rcu_preempt3-21ksoftirqd/019:09:090
81530,0rcu_preempt0-21swapper/123:02:171
10050530,0irq/346-484840054-21kswapd022:51:311
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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