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2026-05-14 - 08:41

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 Thu May 14, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81670,0rcu_preempt19-21ksoftirqd/123:22:591
81650,0rcu_preempt19-21ksoftirqd/122:15:591
81650,0rcu_preempt19-21ksoftirqd/121:08:241
81640,0rcu_preempt19-21ksoftirqd/122:00:191
81640,0rcu_preempt19-21ksoftirqd/121:23:251
81630,0rcu_preempt54-21kswapd000:34:460
81630,0rcu_preempt19-21ksoftirqd/122:50:541
81630,0rcu_preempt19-21ksoftirqd/122:50:541
81630,0rcu_preempt19-21ksoftirqd/122:40:111
81620,0rcu_preempt19-21ksoftirqd/123:14:001
81620,0rcu_preempt19-21ksoftirqd/122:18:171
81620,0rcu_preempt19-21ksoftirqd/121:32:261
81620,0rcu_preempt19-21ksoftirqd/100:04:181
81610,0rcu_preempt19-21ksoftirqd/122:54:191
81610,0rcu_preempt19-21ksoftirqd/121:48:071
81610,0rcu_preempt19-21ksoftirqd/120:14:091
81610,0rcu_preempt19-21ksoftirqd/100:28:181
81610,0rcu_preempt19-21ksoftirqd/100:13:201
81600,0rcu_preempt19-21ksoftirqd/121:17:481
81600,0rcu_preempt19-21ksoftirqd/100:36:291
81580,0rcu_preempt3-21ksoftirqd/023:48:130
81580,0rcu_preempt19-21ksoftirqd/123:28:101
81570,0rcu_preempt54-21kswapd023:55:580
81570,0rcu_preempt54-21kswapd021:22:451
81570,0rcu_preempt54-21kswapd021:22:451
81570,0rcu_preempt3-21ksoftirqd/022:16:180
81570,0rcu_preempt19-21ksoftirqd/123:36:031
81570,0rcu_preempt19-21ksoftirqd/123:25:401
81560,0rcu_preempt54-21kswapd021:20:250
81560,0rcu_preempt54-21kswapd021:20:250
81560,0rcu_preempt3-21ksoftirqd/000:18:120
81560,0rcu_preempt19-21ksoftirqd/100:02:381
81560,0rcu_preempt19-21ksoftirqd/100:02:381
81550,0rcu_preempt19-21ksoftirqd/122:23:261
81550,0rcu_preempt19-21ksoftirqd/120:48:031
10050550,0irq/346-48484006013-1kworker/0:3H00:15:580
81540,0rcu_preempt3-21ksoftirqd/023:12:270
81540,0rcu_preempt19-21ksoftirqd/123:48:141
10050540,0irq/346-484840014535-1kworker/0:1H22:47:460
10050540,0irq/346-48484000-21swapper/022:02:030
81530,0rcu_preempt3-21ksoftirqd/021:28:080
81530,0rcu_preempt19-21ksoftirqd/122:31:431
81520,0rcu_preempt3-21ksoftirqd/021:48:240
81520,0rcu_preempt19-21ksoftirqd/122:08:381
81520,0rcu_preempt19-21ksoftirqd/120:18:211
10050520,0irq/346-484840019458-1kworker/0:0H22:53:150
10050520,0irq/346-484840018654-1kworker/1:0H00:11:521
81510,0rcu_preempt3-21ksoftirqd/023:47:390
81510,0rcu_preempt3-21ksoftirqd/022:38:130
81510,0rcu_preempt3-21ksoftirqd/022:28:280
81510,0rcu_preempt3-21ksoftirqd/022:18:190
81510,0rcu_preempt3-21ksoftirqd/019:13:250
81510,0rcu_preempt3-21ksoftirqd/000:03:180
81510,0rcu_preempt24897-21ping20:13:230
81510,0rcu_preempt19-21ksoftirqd/121:38:131
9950500,0irq/345-48484000-21swapper/022:48:120
9950500,0irq/345-48484000-21swapper/022:48:120
9950500,0irq/345-48484000-21swapper/000:02:400
9950500,0irq/345-48484000-21swapper/000:02:400
81500,0rcu_preempt3-21ksoftirqd/023:27:340
81500,0rcu_preempt3-21ksoftirqd/021:08:250
81500,0rcu_preempt3-21ksoftirqd/019:03:210
81500,0rcu_preempt32176-21kworker/1:321:54:431
81500,0rcu_preempt28196-1kworker/1:0H20:08:271
81500,0rcu_preempt19296-21ps00:28:320
10050500,0irq/346-48484006150-21munin-node0
10050500,0irq/346-484840025162-1kworker/0:2H21:53:390
81490,0rcu_preempt7344-21ssh23:43:301
81490,0rcu_preempt3-21ksoftirqd/023:18:170
81490,0rcu_preempt3-21ksoftirqd/020:08:180
81490,0rcu_preempt3-21ksoftirqd/019:53:210
81490,0rcu_preempt19-21ksoftirqd/123:56:121
81490,0rcu_preempt19-21ksoftirqd/120:23:131
81490,0rcu_preempt19-21ksoftirqd/120:03:251
81490,0rcu_preempt18832-21memory21:43:250
10050490,0irq/346-48484001425-21munin-node0
81480,0rcu_preempt3-21ksoftirqd/022:12:150
81480,0rcu_preempt3-21ksoftirqd/020:06:530
81480,0rcu_preempt19-21ksoftirqd/121:35:581
10050480,0irq/346-484840054-21kswapd019:23:321
81470,0rcu_preempt3-21ksoftirqd/021:25:230
81470,0rcu_preempt3-21ksoftirqd/000:09:160
81470,0rcu_preempt19-21ksoftirqd/121:43:291
81470,0rcu_preempt19-21ksoftirqd/119:55:471
81470,0rcu_preempt19-21ksoftirqd/100:18:141
10050470,0irq/346-484840013349-21ssh00:23:050
10050470,0irq/346-48484000-21swapper/120:48:021
9950460,0irq/345-484840032744-21ntp_kernel_pll_23:03:250
81460,0rcu_preempt9804-21kworker/0:022:03:100
81460,0rcu_preempt3-21ksoftirqd/023:13:170
81460,0rcu_preempt3-21ksoftirqd/020:00:360
81460,0rcu_preempt3-21ksoftirqd/019:18:140
81460,0rcu_preempt19-21ksoftirqd/123:08:151
81460,0rcu_preempt19-21ksoftirqd/120:53:181
81460,0rcu_preempt12735-21apt-get20:58:140
81460,0rcu_preempt0-21swapper/122:03:201
10050460,0irq/346-484840015171-1kworker/1:0H19:29:211
10050460,0irq/346-48484000-21swapper/022:59:010
10050460,0irq/346-48484000-21swapper/022:33:500
81450,0rcu_preempt3-21ksoftirqd/022:23:230
81450,0rcu_preempt3-21ksoftirqd/020:53:130
81450,0rcu_preempt3-21ksoftirqd/019:46:140
81450,0rcu_preempt3-21ksoftirqd/019:11:470
81450,0rcu_preempt19-21ksoftirqd/122:43:211
81450,0rcu_preempt19-21ksoftirqd/120:28:181
9950440,0irq/345-484840028922-21apt-get23:33:140
9950440,0irq/345-48484000-21swapper/021:15:360
81440,0rcu_preempt8861-21irqstats21:33:220
81440,0rcu_preempt3-21ksoftirqd/020:18:030
81440,0rcu_preempt22701-21memory19:48:230
81440,0rcu_preempt19-21ksoftirqd/122:58:191
81440,0rcu_preempt19-21ksoftirqd/119:58:141
81440,0rcu_preempt19-21ksoftirqd/119:53:031
81440,0rcu_preempt19-21ksoftirqd/119:18:531
10050440,0irq/346-48484004004-1kworker/0:2H20:33:180
10050440,0irq/346-484840025767-21rm23:29:130
10050440,0irq/346-484840016460-21ssh21:41:110
81430,0rcu_preempt3-21ksoftirqd/020:50:220
81430,0rcu_preempt3-21ksoftirqd/020:43:260
81430,0rcu_preempt32176-21kworker/1:320:58:241
81430,0rcu_preempt19-21ksoftirqd/123:03:251
81430,0rcu_preempt19-21ksoftirqd/119:33:291
81430,0rcu_preempt19-21ksoftirqd/119:08:221
81430,0rcu_preempt12140-21ping19:38:220
81420,0rcu_preempt3-21ksoftirqd/020:29:200
81420,0rcu_preempt19-21ksoftirqd/122:37:161
10050420,0irq/346-484840014560-21df21:03:160
81410,0rcu_preempt54-21kswapd019:33:190
81410,0rcu_preempt19-21ksoftirqd/123:38:271
81410,0rcu_preempt15868-21diskmemload00:23:251
81410,0rcu_preempt0-21swapper/121:03:031
81400,0rcu_preempt3-21ksoftirqd/020:26:540
81400,0rcu_preempt3-21ksoftirqd/019:28:290
81400,0rcu_preempt19-21ksoftirqd/120:38:221
81390,0rcu_preempt3-21ksoftirqd/019:23:160
81390,0rcu_preempt19-21ksoftirqd/120:33:161
81380,0rcu_preempt19-21ksoftirqd/119:43:361
81380,0rcu_preempt19-21ksoftirqd/119:38:331
81380,0rcu_preempt19-21ksoftirqd/119:07:441
81370,0rcu_preempt19-21ksoftirqd/119:13:231
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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