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2026-05-02 - 07:09

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 Sat May 02, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811110,0rcu_preempt18822-21ssh22:53:440
811050,0rcu_preempt3-21ksoftirqd/000:29:360
811000,0rcu_preempt3-21ksoftirqd/023:09:430
81890,0rcu_preempt19-21ksoftirqd/122:23:381
81800,0rcu_preempt3-21ksoftirqd/022:12:280
81760,0rcu_preempt3-21ksoftirqd/021:16:470
81750,0rcu_preempt3-21ksoftirqd/023:32:520
81750,0rcu_preempt3-21ksoftirqd/022:50:200
81740,0rcu_preempt3-21ksoftirqd/023:43:100
81740,0rcu_preempt3-21ksoftirqd/022:23:350
81740,0rcu_preempt3-21ksoftirqd/021:39:450
81740,0rcu_preempt3-21ksoftirqd/021:25:240
81720,0rcu_preempt3-21ksoftirqd/023:45:360
81710,0rcu_preempt54-21kswapd000:15:210
81710,0rcu_preempt3-21ksoftirqd/021:10:220
81700,0rcu_preempt3-21ksoftirqd/000:20:060
3544997011,0cyclictest22709-21dropbear00:03:340
81680,0rcu_preempt3-21ksoftirqd/023:23:140
81680,0rcu_preempt3-21ksoftirqd/023:03:320
81680,0rcu_preempt3-21ksoftirqd/022:58:550
81670,0rcu_preempt9215-21df_abs21:03:270
81670,0rcu_preempt19-21ksoftirqd/100:13:421
354499676,0cyclictest0-21swapper/022:38:090
354499676,0cyclictest0-21swapper/022:38:090
81660,0rcu_preempt3-21ksoftirqd/023:33:320
354499661,0cyclictest27449-21awk00:08:260
354499661,0cyclictest1470-21runrttasks21:28:450
81650,0rcu_preempt8718-21ssh22:43:390
81650,0rcu_preempt3-21ksoftirqd/023:16:070
81650,0rcu_preempt19-21ksoftirqd/123:48:291
3544996514,0cyclictest0-21swapper/022:17:320
354499651,0cyclictest15142-21apt-get23:23:260
354499642,0cyclictest6824-21ping19:43:270
354499641,0cyclictest6824-21ping19:28:240
354499641,0cyclictest6824-21ping19:28:240
354499641,0cyclictest2526350kworker/0:2H22:07:410
81630,0rcu_preempt3-21ksoftirqd/019:48:340
81630,0rcu_preempt19-21ksoftirqd/123:47:561
81630,0rcu_preempt11889-21apt-get19:33:251
354499636,0cyclictest19569-1kworker/0:0H00:34:530
354499632,0cyclictest6824-21ping19:24:570
354499632,0cyclictest13284-21runrttasks00:26:330
81610,0rcu_preempt3-21ksoftirqd/023:48:320
81610,0rcu_preempt26668-21munin-node1
354499612,0cyclictest0-21swapper/021:18:400
3544996113,0cyclictest0-21swapper/022:01:370
81600,0rcu_preempt19-21ksoftirqd/123:58:261
354499602,0cyclictest0-21swapper/022:42:470
3544996014,0cyclictest0-21swapper/020:58:390
81590,0rcu_preempt3-21ksoftirqd/023:58:240
81590,0rcu_preempt19-21ksoftirqd/121:43:411
81590,0rcu_preempt19-21ksoftirqd/100:26:241
354499591,0cyclictest6824-21ping19:23:140
81580,0rcu_preempt3-21ksoftirqd/019:55:540
81580,0rcu_preempt3-21ksoftirqd/019:08:250
354499582,0cyclictest0-21swapper/021:51:410
354499581,0cyclictest1470-21runrttasks22:31:550
81570,0rcu_preempt3-21ksoftirqd/023:53:170
81570,0rcu_preempt3-21ksoftirqd/019:13:310
81570,0rcu_preempt25014-21apt-get20:13:240
81570,0rcu_preempt19-21ksoftirqd/100:05:161
354499572,0cyclictest0-21swapper/021:35:510
3544995713,0cyclictest14510-21unixbench_multi19:38:490
354499571,0cyclictest23739-21meminfo21:53:360
81560,0rcu_preempt19-21ksoftirqd/123:18:411
81560,0rcu_preempt19-21ksoftirqd/123:08:291
81560,0rcu_preempt19-21ksoftirqd/122:42:571
81560,0rcu_preempt19-21ksoftirqd/120:00:091
81560,0rcu_preempt19-21ksoftirqd/119:19:591
354499562,0cyclictest6824-21ping19:33:250
354499562,0cyclictest0-21swapper/022:21:170
354499562,0cyclictest0-21swapper/021:45:150
3544995611,0cyclictest0-21swapper/020:18:340
9950550,0irq/345-4848400354599cyclictest21:30:091
81550,0rcu_preempt3-21ksoftirqd/019:03:360
81550,0rcu_preempt19-21ksoftirqd/123:23:571
81550,0rcu_preempt19-21ksoftirqd/122:55:251
81550,0rcu_preempt19-21ksoftirqd/122:03:061
81550,0rcu_preempt19-21ksoftirqd/121:13:311
81550,0rcu_preempt19-21ksoftirqd/120:03:341
354499552,0cyclictest5579-21192.168.115.60-20:53:140
3544995512,0cyclictest28476-21df20:23:280
10050550,0irq/346-484840054-21kswapd020:08:420
81540,0rcu_preempt19-21ksoftirqd/123:38:491
81540,0rcu_preempt19-21ksoftirqd/121:08:341
81540,0rcu_preempt19-21ksoftirqd/120:08:241
81540,0rcu_preempt19-21ksoftirqd/100:11:591
354499542,0cyclictest0-21swapper/020:53:330
81530,0rcu_preempt3-21ksoftirqd/019:58:320
81530,0rcu_preempt19-21ksoftirqd/122:14:011
81530,0rcu_preempt19-21ksoftirqd/122:08:361
354499532,0cyclictest0-21swapper/020:03:350
81520,0rcu_preempt3-21ksoftirqd/020:38:370
81520,0rcu_preempt19-21ksoftirqd/123:54:451
81520,0rcu_preempt19-21ksoftirqd/123:01:301
81520,0rcu_preempt19-21ksoftirqd/121:39:521
81520,0rcu_preempt19-21ksoftirqd/120:29:091
354499523,0cyclictest0-21swapper/020:33:400
81510,0rcu_preempt19-21ksoftirqd/123:17:241
81510,0rcu_preempt19-21ksoftirqd/122:43:471
354499512,0cyclictest0-21swapper/020:43:380
81490,0rcu_preempt19-21ksoftirqd/120:27:341
3544994911,0cyclictest10050irq/346-484840020:33:090
81470,0rcu_preempt19-21ksoftirqd/122:18:311
81470,0rcu_preempt19-21ksoftirqd/121:48:251
81470,0rcu_preempt19-21ksoftirqd/120:13:431
81470,0rcu_preempt19-21ksoftirqd/100:21:141
81470,0rcu_preempt0-21swapper/123:33:231
81460,0rcu_preempt54-21kswapd022:31:231
81450,0rcu_preempt19-21ksoftirqd/122:48:381
81450,0rcu_preempt19-21ksoftirqd/122:34:551
81450,0rcu_preempt19-21ksoftirqd/122:34:551
81450,0rcu_preempt19-21ksoftirqd/121:36:301
81450,0rcu_preempt19-21ksoftirqd/119:48:151
81450,0rcu_preempt19-21ksoftirqd/119:03:331
81450,0rcu_preempt10518-21diskmemload23:31:211
81440,0rcu_preempt19-21ksoftirqd/122:03:431
81440,0rcu_preempt1470-21runrttasks00:33:461
81440,0rcu_preempt10518-21diskmemload21:57:321
81430,0rcu_preempt0-21swapper/121:03:251
81420,0rcu_preempt19-21ksoftirqd/121:22:371
81420,0rcu_preempt10518-21diskmemload00:31:061
81420,0rcu_preempt0-21swapper/123:06:041
81410,0rcu_preempt19-21ksoftirqd/121:26:401
81410,0rcu_preempt17955-21taskset19:49:351
81400,0rcu_preempt19-21ksoftirqd/120:47:071
81400,0rcu_preempt19-21ksoftirqd/119:53:571
81400,0rcu_preempt19-21ksoftirqd/119:09:101
81400,0rcu_preempt1470-21runrttasks20:48:261
81390,0rcu_preempt19-21ksoftirqd/121:00:371
81390,0rcu_preempt19-21ksoftirqd/120:55:101
81390,0rcu_preempt19-21ksoftirqd/120:38:451
81390,0rcu_preempt19-21ksoftirqd/120:33:571
81380,0rcu_preempt19-21ksoftirqd/119:38:371
81380,0rcu_preempt16318-21kworker/1:019:14:101
81360,0rcu_preempt19-21ksoftirqd/119:23:381
81350,0rcu_preempt19-21ksoftirqd/119:28:451
81350,0rcu_preempt19-21ksoftirqd/119:28:451
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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