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2026-09-06 - 09:37

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 Sun Sep 06, 2026 00:43:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81990,0rcu_preempt19-21ksoftirqd/119:34:551
81900,0rcu_preempt19-21ksoftirqd/123:59:251
81820,0rcu_preempt11362-1kworker/1:1H21:34:461
81820,0rcu_preempt11362-1kworker/1:1H21:34:461
10050820,0irq/346-484840054-21kswapd022:09:370
81790,0rcu_preempt19-21ksoftirqd/122:59:251
10050770,0irq/346-484840054-21kswapd023:21:440
10050770,0irq/346-484840054-21kswapd022:29:510
10050750,0irq/346-484840054-21kswapd000:12:310
10050740,0irq/346-48484006718-1kworker/0:2H00:32:400
10050730,0irq/346-484840054-21kswapd021:27:430
10050730,0irq/346-484840031436-1kworker/0:0H22:47:060
10050730,0irq/346-484840031436-1kworker/0:0H22:47:060
81720,0rcu_preempt3-21ksoftirqd/023:06:200
10050720,0irq/346-484840054-21kswapd023:41:461
10050720,0irq/346-484840026785-1kworker/0:2H23:15:410
10050710,0irq/346-4848400836-21rngd22:55:140
10050710,0irq/346-484840054-21kswapd023:31:120
10050710,0irq/346-484840029177-1kworker/0:0H00:23:480
10050710,0irq/346-484840021437-1kworker/0:3H22:38:490
2467299709,0cyclictest0-21swapper/000:39:170
10050700,0irq/346-484840029746-1kworker/0:1H21:15:310
10050700,0irq/346-484840026343-1kworker/0:0H21:39:220
10050700,0irq/346-484840026343-1kworker/0:0H21:39:220
10050700,0irq/346-484840016675-1kworker/0:2H23:42:470
10050690,0irq/346-484840026345-1kworker/0:3H22:02:060
10050690,0irq/346-484840024185-1kworker/0:3H00:19:140
81680,0rcu_preempt3-21ksoftirqd/023:53:040
81670,0rcu_preempt3-21ksoftirqd/021:51:550
81670,0rcu_preempt3-21ksoftirqd/020:04:430
10050670,0irq/346-4848400836-21rngd21:47:390
2467299668,0cyclictest15247-21latency_hist20:19:250
2467299661,0cyclictest2176-1kworker/0:2H21:19:590
10050660,0irq/346-484840029746-1kworker/0:1H21:13:170
2467299654,0cyclictest1444-1kworker/0:0H22:19:330
2467299651,0cyclictest31635-1kworker/0:2H23:54:270
24672996410,0cyclictest403650kworker/0:1H22:53:350
81630,0rcu_preempt54-21kswapd021:30:350
2467299632,0cyclictest413-21munin-run19:34:240
2467299631,0cyclictest30163-21apt-get21:04:380
2467299629,0cyclictest0-21swapper/000:04:240
2467299622,0cyclictest23311-21ssh22:05:130
24672996212,0cyclictest14057-1kworker/0:2H23:01:260
81610,0rcu_preempt3-21ksoftirqd/020:44:230
81610,0rcu_preempt3-21ksoftirqd/020:19:450
81610,0rcu_preempt3204-21kworker/0:223:24:480
81610,0rcu_preempt1813-1kworker/0:2H19:47:280
2467299616,0cyclictest16430-1kworker/0:0H22:39:380
2467299614,0cyclictest0-21swapper/021:58:230
2467299612,0cyclictest31514-21ssh21:41:090
10050610,0irq/346-48484009229-1kworker/1:0H00:02:091
81600,0rcu_preempt25628-21kworker/0:019:59:390
2467299604,0cyclictest0-21swapper/023:45:180
2467299602,0cyclictest12361-21ssh22:27:090
2467299602,0cyclictest0-21swapper/019:39:240
2467299601,0cyclictest16634-1kworker/0:2H22:14:420
81590,0rcu_preempt7883-21ps19:54:490
81590,0rcu_preempt27444-21memory20:54:450
2467299596,0cyclictest9230-1kworker/0:3H00:05:310
24672995912,0cyclictest0-21swapper/023:10:470
24672995912,0cyclictest0-21swapper/023:10:470
2467299591,0cyclictest24185-1kworker/0:3H00:25:280
81580,0rcu_preempt19-21ksoftirqd/122:52:061
2467299582,0cyclictest25249-21chrt20:49:380
81570,0rcu_preempt3-21ksoftirqd/019:14:420
81570,0rcu_preempt3-21ksoftirqd/019:14:420
81570,0rcu_preempt19-21ksoftirqd/123:52:071
81570,0rcu_preempt19-21ksoftirqd/100:29:491
2467299564,0cyclictest27957-21ping19:19:380
24672995616,0cyclictest29227-1kworker/0:0H19:24:470
2467299561,0cyclictest2243-21latency_hist19:39:270
2467299561,0cyclictest14840-21ssh23:34:420
2467299551,0cyclictest26321-21latency_hist19:14:250
81540,0rcu_preempt3-21ksoftirqd/020:34:370
81540,0rcu_preempt3-21ksoftirqd/019:49:360
9950530,0irq/345-4848400836-21rngd00:22:471
2467299538,0cyclictest28090-1kworker/0:3H21:00:430
2467299532,0cyclictest13538-21runrttasks20:14:090
2467299532,0cyclictest0-21swapper/020:28:340
81520,0rcu_preempt19-21ksoftirqd/122:25:321
81520,0rcu_preempt0-21swapper/121:58:281
81520,0rcu_preempt0-21swapper/121:48:501
2467299521,0cyclictest18841-21df_abs20:29:390
10050520,0irq/346-484840054-21kswapd021:29:241
10050520,0irq/346-484840011692-1kworker/1:2H00:36:341
81510,0rcu_preempt19-21ksoftirqd/123:29:361
81500,0rcu_preempt19-21ksoftirqd/121:59:461
81500,0rcu_preempt19-21ksoftirqd/121:19:401
81500,0rcu_preempt19-21ksoftirqd/120:09:251
81500,0rcu_preempt0-21swapper/123:20:321
9950490,0irq/345-484840016674-1kworker/1:3H23:44:441
81490,0rcu_preempt19-21ksoftirqd/121:29:251
2467299491,0cyclictest23586-21apt-get20:44:350
10050490,0irq/346-484840054-21kswapd000:15:011
10050490,0irq/346-48484004482-21munin-node1
81480,0rcu_preempt19-21ksoftirqd/119:59:271
81480,0rcu_preempt0-21swapper/121:13:251
10050480,0irq/346-484840023340-21ssh23:10:071
10050480,0irq/346-484840023340-21ssh23:10:071
81470,0rcu_preempt19-21ksoftirqd/122:59:541
81470,0rcu_preempt19-21ksoftirqd/122:34:061
81470,0rcu_preempt19-21ksoftirqd/120:24:521
81470,0rcu_preempt19-21ksoftirqd/119:29:421
81470,0rcu_preempt19-21ksoftirqd/119:19:521
10050470,0irq/346-484840054-21kswapd000:24:501
10050470,0irq/346-484840016786-21ssh23:36:171
81460,0rcu_preempt19-21ksoftirqd/122:47:091
81460,0rcu_preempt19-21ksoftirqd/122:47:091
81460,0rcu_preempt19-21ksoftirqd/122:24:061
81460,0rcu_preempt19-21ksoftirqd/120:34:361
81460,0rcu_preempt19-21ksoftirqd/120:04:251
81460,0rcu_preempt19-21ksoftirqd/119:24:541
2467299466,0cyclictest24705-21latency_hist19:09:250
10050460,0irq/346-484840011362-1kworker/1:1H21:39:301
81450,0rcu_preempt19-21ksoftirqd/120:19:551
81450,0rcu_preempt19-21ksoftirqd/120:14:251
81450,0rcu_preempt19-21ksoftirqd/119:45:021
81450,0rcu_preempt19-21ksoftirqd/119:39:491
10050450,0irq/346-484840018749-21ssh23:05:391
10050450,0irq/346-48484000-21swapper/123:19:251
81440,0rcu_preempt19-21ksoftirqd/122:41:081
81440,0rcu_preempt19-21ksoftirqd/100:10:311
10050440,0irq/346-484840028089-1kworker/1:3H20:59:251
81430,0rcu_preempt19-21ksoftirqd/123:24:411
81430,0rcu_preempt19-21ksoftirqd/122:12:471
81430,0rcu_preempt19-21ksoftirqd/122:04:301
81430,0rcu_preempt19-21ksoftirqd/121:49:511
81430,0rcu_preempt13424-21kworker/1:200:07:311
81420,0rcu_preempt19-21ksoftirqd/120:29:521
81420,0rcu_preempt19-21ksoftirqd/119:04:431
81410,0rcu_preempt19-21ksoftirqd/122:14:351
81410,0rcu_preempt19-21ksoftirqd/121:04:371
81400,0rcu_preempt19-21ksoftirqd/120:49:531
81400,0rcu_preempt19-21ksoftirqd/120:44:501
10050400,0irq/346-484840021436-1kworker/1:3H22:38:241
81390,0rcu_preempt19-21ksoftirqd/120:59:371
81390,0rcu_preempt19-21ksoftirqd/120:39:261
81390,0rcu_preempt19-21ksoftirqd/119:56:501
81390,0rcu_preempt19-21ksoftirqd/119:14:411
81390,0rcu_preempt19-21ksoftirqd/119:14:411
81390,0rcu_preempt19-21ksoftirqd/119:09:451
81360,0rcu_preempt19-21ksoftirqd/119:49:441
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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