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2026-06-02 - 07:26

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 highest latencies:
System rackaslot5s.osadl.org (updated Tue Jun 02, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811400,0rcu_preempt19-21ksoftirqd/122:33:531
811300,0rcu_preempt0-21swapper/100:08:451
811280,0rcu_preempt19-21ksoftirqd/123:39:111
811000,0rcu_preempt851-21rngd22:26:281
81950,0rcu_preempt19-21ksoftirqd/122:28:061
81940,0rcu_preempt29254-21kworker/1:022:21:511
81850,0rcu_preempt54-21kswapd023:27:001
10050740,0irq/346-484840030718-1kworker/0:0H21:19:150
81730,0rcu_preempt54-21kswapd000:00:571
81720,0rcu_preempt19-21ksoftirqd/123:49:061
10050720,0irq/346-484840017440-1kworker/0:0H22:07:460
81710,0rcu_preempt20793-21dropbear21:37:581
81700,0rcu_preempt19-21ksoftirqd/121:13:001
81700,0rcu_preempt19-21ksoftirqd/100:19:061
10050690,0irq/346-484840028311-1kworker/0:3H21:49:460
10050690,0irq/346-48484002681-1kworker/0:2H22:25:130
81680,0rcu_preempt19-21ksoftirqd/122:45:181
81670,0rcu_preempt3-21ksoftirqd/020:53:030
81670,0rcu_preempt20094-1kworker/1:1H22:11:361
81670,0rcu_preempt19-21ksoftirqd/123:33:341
81660,0rcu_preempt19-21ksoftirqd/121:12:101
1575199668,0cyclictest3127-21munin-node0
81650,0rcu_preempt19-21ksoftirqd/122:50:191
81650,0rcu_preempt19-21ksoftirqd/100:29:141
81640,0rcu_preempt19-21ksoftirqd/123:04:301
81640,0rcu_preempt19-21ksoftirqd/121:22:551
81630,0rcu_preempt3-21ksoftirqd/023:08:050
81630,0rcu_preempt19-21ksoftirqd/100:23:011
1575199632,0cyclictest0-21swapper/022:46:370
1575199632,0cyclictest0-21swapper/021:08:450
1575199631,0cyclictest20085-21runrttasks21:37:280
10050630,0irq/346-484840054-21kswapd021:45:040
10050630,0irq/346-48484002954-1kworker/0:0H00:35:100
1575199629,0cyclictest934-21ping20:04:540
1575199623,0cyclictest0-21swapper/022:13:040
1575199622,0cyclictest0-21swapper/022:33:240
1575199622,0cyclictest0-21swapper/020:23:320
81610,0rcu_preempt19-21ksoftirqd/122:54:171
1575199613,0cyclictest0-21swapper/023:28:420
81600,0rcu_preempt19-21ksoftirqd/121:20:311
1575199602,0cyclictest0-21swapper/023:43:050
1575199602,0cyclictest0-21swapper/023:18:110
1575199602,0cyclictest0-21swapper/000:20:020
1575199601,0cyclictest25582-21idleruntime-cro19:37:440
81590,0rcu_preempt1049-21avahi-daemon19:13:031
1575199592,0cyclictest1470-21runrttasks21:25:340
1575199592,0cyclictest0-21swapper/021:28:000
15751995914,0cyclictest0-21swapper/021:53:440
1575199589,0cyclictest31042-21munin-node0
1575199582,0cyclictest7987-21ssh21:57:480
1575199582,0cyclictest28309-21seq00:27:590
1575199582,0cyclictest0-21swapper/023:24:010
1575199582,0cyclictest0-21swapper/022:51:400
1575199582,0cyclictest0-21swapper/020:27:590
1575199582,0cyclictest0-21swapper/020:27:590
15751995812,0cyclictest0-21swapper/022:37:550
10050580,0irq/346-484840054-21kswapd023:13:130
1575199574,0cyclictest1350-21lldpd22:03:230
1575199573,0cyclictest0-21swapper/022:29:260
1575199572,0cyclictest26008-21ssh23:53:050
1575199572,0cyclictest0-21swapper/000:26:410
15751995712,0cyclictest0-21swapper/000:08:170
1575199571,0cyclictest5341-1kworker/0:0H00:13:160
1575199571,0cyclictest4501-21taskset22:58:180
1575199571,0cyclictest4501-21taskset22:58:180
81560,0rcu_preempt22741-21diskmemload21:33:131
81560,0rcu_preempt0-21swapper/121:57:551
1575199563,0cyclictest0-21swapper/000:02:330
1575199562,0cyclictest0-21swapper/020:38:000
15751995612,0cyclictest0-21swapper/021:14:310
15751995612,0cyclictest0-21swapper/020:18:090
1575199561,0cyclictest10867-21df_inode23:37:590
1575199561,0cyclictest0-21swapper/023:36:210
1575199552,0cyclictest19032-21ping19:22:560
15751995514,0cyclictest0-21swapper/023:52:150
15751995512,0cyclictest0-21swapper/020:43:110
1575199551,0cyclictest19032-21ping19:47:570
81540,0rcu_preempt19-21ksoftirqd/120:22:451
81540,0rcu_preempt19-21ksoftirqd/100:17:451
1575199543,0cyclictest0-21swapper/019:38:130
15751995413,0cyclictest28056-21munin-node0
1575199541,0cyclictest19697-21munin-node0
81530,0rcu_preempt19-21ksoftirqd/120:17:571
1575199532,0cyclictest0-21swapper/021:37:590
15751995315,0cyclictest225122chrt21:05:220
81520,0rcu_preempt19-21ksoftirqd/121:43:071
1575199522,0cyclictest28678-21runrttasks19:45:480
1575199521,0cyclictest19032-21ping19:27:550
81510,0rcu_preempt19-21ksoftirqd/123:27:571
15751995113,0cyclictest0-21swapper/019:58:190
81500,0rcu_preempt19-21ksoftirqd/121:07:441
81490,0rcu_preempt3-21ksoftirqd/019:08:110
15751994910,0cyclictest0-21swapper/023:04:380
81480,0rcu_preempt3-21ksoftirqd/020:13:030
81480,0rcu_preempt19-21ksoftirqd/100:02:591
81480,0rcu_preempt17966-21apt-get20:52:581
81470,0rcu_preempt22741-21diskmemload23:08:051
81470,0rcu_preempt19-21ksoftirqd/122:37:451
81470,0rcu_preempt14237-21apt-get19:02:540
1575199471,0cyclictest0-21swapper/021:02:440
81460,0rcu_preempt19-21ksoftirqd/123:43:001
81460,0rcu_preempt19-21ksoftirqd/122:13:061
81460,0rcu_preempt19-21ksoftirqd/119:48:091
81460,0rcu_preempt19-21ksoftirqd/119:30:021
81450,0rcu_preempt19-21ksoftirqd/119:40:141
81450,0rcu_preempt19-21ksoftirqd/100:32:591
10050450,0irq/346-484840019032-21ping19:47:141
9950440,0irq/345-48484001699migration/123:54:331
81440,0rcu_preempt934-21ping20:28:031
81440,0rcu_preempt934-21ping20:28:031
81440,0rcu_preempt3793-21ssh21:53:071
81440,0rcu_preempt19-21ksoftirqd/120:03:041
81430,0rcu_preempt3-21ksoftirqd/020:33:070
81430,0rcu_preempt3-21ksoftirqd/020:10:520
81430,0rcu_preempt19-21ksoftirqd/122:58:011
81430,0rcu_preempt19-21ksoftirqd/122:58:011
81430,0rcu_preempt19-21ksoftirqd/120:00:481
81430,0rcu_preempt19032-21ping19:26:221
81420,0rcu_preempt29254-21kworker/1:021:52:101
81420,0rcu_preempt24084-21gzip23:18:091
81420,0rcu_preempt19-21ksoftirqd/120:13:081
81420,0rcu_preempt19-21ksoftirqd/120:08:011
81420,0rcu_preempt19-21ksoftirqd/119:37:091
81420,0rcu_preempt19-21ksoftirqd/119:18:151
81420,0rcu_preempt13067-21apt-get22:02:541
81410,0rcu_preempt19-21ksoftirqd/121:28:001
81410,0rcu_preempt19-21ksoftirqd/120:43:121
81400,0rcu_preempt3-21ksoftirqd/019:16:360
81400,0rcu_preempt19-21ksoftirqd/123:12:451
81390,0rcu_preempt3-21ksoftirqd/020:51:430
81390,0rcu_preempt19-21ksoftirqd/120:38:041
81390,0rcu_preempt15547-21taskset19:05:511
81390,0rcu_preempt0-21swapper/120:47:541
81380,0rcu_preempt3-21ksoftirqd/019:54:250
81380,0rcu_preempt19-21ksoftirqd/120:58:131
81380,0rcu_preempt19-21ksoftirqd/120:32:591
81380,0rcu_preempt19-21ksoftirqd/119:52:451
81360,0rcu_preempt19-21ksoftirqd/119:08:081
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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