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2026-04-01 - 04:24

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 792 highest latencies:
System rackaslot5s.osadl.org (updated Wed Apr 01, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811250,0rcu_preempt3-21ksoftirqd/019:44:080
811250,0rcu_preempt3-21ksoftirqd/019:44:080
811190,0rcu_preempt3-21ksoftirqd/019:39:080
81950,0rcu_preempt20444-1kworker/0:1H22:45:300
81950,0rcu_preempt20444-1kworker/0:1H22:45:300
81790,0rcu_preempt54-21kswapd021:35:020
81790,0rcu_preempt54-21kswapd021:35:020
81780,0rcu_preempt3-21ksoftirqd/023:12:130
81780,0rcu_preempt3-21ksoftirqd/021:38:550
10050760,0irq/346-4848400171rcuc/123:42:251
10050760,0irq/346-4848400171rcuc/123:42:251
81740,0rcu_preempt23764-1kworker/0:0H21:13:230
81720,0rcu_preempt18267-21kworker/0:100:22:290
81700,0rcu_preempt3-21ksoftirqd/023:28:360
81690,0rcu_preempt3-21ksoftirqd/023:54:130
10050690,0irq/346-4848400171rcuc/123:23:331
81680,0rcu_preempt31946-21kworker/0:122:10:190
81670,0rcu_preempt3-21ksoftirqd/023:17:440
81670,0rcu_preempt3-21ksoftirqd/000:38:230
10050670,0irq/346-48484001067-21lighttpd23:15:171
81660,0rcu_preempt3-21ksoftirqd/022:21:340
81660,0rcu_preempt3-21ksoftirqd/021:49:430
81650,0rcu_preempt3-21ksoftirqd/022:02:030
81640,0rcu_preempt3-21ksoftirqd/000:27:550
81640,0rcu_preempt25599-21munin-run22:18:430
81630,0rcu_preempt30403-1kworker/0:0H00:08:440
81620,0rcu_preempt3-21ksoftirqd/022:42:500
81620,0rcu_preempt3-21ksoftirqd/021:44:590
81620,0rcu_preempt3-21ksoftirqd/021:44:590
9950610,0irq/345-48484007038-1kworker/1:2H00:11:161
81610,0rcu_preempt0-21swapper/121:27:001
10050610,0irq/346-484840054-21kswapd000:38:411
10050610,0irq/346-484840012060-1kworker/1:1H00:16:111
10050600,0irq/346-484840054-21kswapd023:23:461
10050600,0irq/346-484840015459-1kworker/1:1H22:44:581
10050600,0irq/346-484840015459-1kworker/1:1H22:44:581
81590,0rcu_preempt54-21kswapd022:22:351
81590,0rcu_preempt19-21ksoftirqd/120:23:331
10050590,0irq/346-484840054-21kswapd021:35:551
10050590,0irq/346-484840054-21kswapd021:35:551
81580,0rcu_preempt54-21kswapd023:37:531
10050580,0irq/346-484840054-21kswapd023:08:501
10050580,0irq/346-484840054-21kswapd023:01:271
81570,0rcu_preempt3-21ksoftirqd/021:14:090
10050570,0irq/346-484840020425-1kworker/1:0H00:24:341
81560,0rcu_preempt6948-21ps20:24:120
81560,0rcu_preempt54-21kswapd022:58:011
81560,0rcu_preempt3-21ksoftirqd/023:46:580
81560,0rcu_preempt28438-21ssh23:58:580
81560,0rcu_preempt26282-21ssh22:51:231
81560,0rcu_preempt22319-21munin-node0
81560,0rcu_preempt19369-21apt-get21:03:520
81560,0rcu_preempt19-21ksoftirqd/120:17:431
81560,0rcu_preempt19-21ksoftirqd/120:08:081
10050560,0irq/346-484840031328-21ssh21:18:591
10050560,0irq/346-484840017910-1kworker/1:2H22:12:081
81550,0rcu_preempt54-21kswapd000:07:311
81550,0rcu_preempt3-21ksoftirqd/019:24:060
81550,0rcu_preempt0-21swapper/122:00:441
81550,0rcu_preempt0-21swapper/120:39:441
10050550,0irq/346-484840054-21kswapd022:35:500
10050550,0irq/346-484840054-21kswapd022:07:581
10050550,0irq/346-4848400412-1kworker/0:1H22:29:100
10050550,0irq/346-48484000-21swapper/119:39:061
81540,0rcu_preempt3-21ksoftirqd/000:08:440
81540,0rcu_preempt19-21ksoftirqd/120:10:191
10050540,0irq/346-4848400851-21rngd21:30:001
10050540,0irq/346-484840054-21kswapd021:39:131
10050540,0irq/346-484840054-21kswapd000:29:521
10050540,0irq/346-484840054-21kswapd000:21:021
10050540,0irq/346-484840030417-1kworker/1:0H21:52:041
10050540,0irq/346-484840030402-1kworker/1:2H00:01:511
10050540,0irq/346-484840022876-1kworker/1:1H22:17:171
10050540,0irq/346-484840010438-1kworker/1:0H22:37:241
81530,0rcu_preempt19-21ksoftirqd/123:49:101
81530,0rcu_preempt0-21swapper/123:47:121
10050530,0irq/346-484840054-21kswapd021:58:440
10050530,0irq/346-484840054-21kswapd021:18:011
10050530,0irq/346-484840027936-1kworker/1:1H23:30:041
10050530,0irq/346-484840020424-1kworker/0:0H23:51:290
81520,0rcu_preempt3-21ksoftirqd/022:54:150
10050520,0irq/346-48484006292-1kworker/0:2H21:26:270
10050520,0irq/346-48484005464-1kworker/0:3H23:39:290
10050520,0irq/346-48484005464-1kworker/0:3H23:39:290
10050520,0irq/346-484840054-21kswapd023:07:071
10050520,0irq/346-4848400413-1kworker/1:1H22:28:181
81510,0rcu_preempt3-21ksoftirqd/020:59:020
10050510,0irq/346-48484005460-1kworker/1:2H22:30:501
10050510,0irq/346-484840054-21kswapd021:44:041
10050510,0irq/346-484840054-21kswapd021:44:041
10050510,0irq/346-484840054-21kswapd021:20:080
10050510,0irq/346-48484002974-1kworker/1:1H21:56:151
81500,0rcu_preempt3-21ksoftirqd/022:59:120
81500,0rcu_preempt3-21ksoftirqd/021:29:030
81500,0rcu_preempt3-21ksoftirqd/020:49:030
10050500,0irq/346-48484000-21swapper/023:34:410
81490,0rcu_preempt19-21ksoftirqd/120:26:301
81490,0rcu_preempt19-21ksoftirqd/119:48:571
10050490,0irq/346-484840054-21kswapd022:27:120
10050490,0irq/346-484840054-21kswapd000:15:100
10050490,0irq/346-48484000-21swapper/023:19:430
10050490,0irq/346-48484000-21swapper/023:05:360
10050490,0irq/346-48484000-21swapper/022:52:460
81480,0rcu_preempt3-21ksoftirqd/020:34:070
81480,0rcu_preempt19-21ksoftirqd/119:56:201
10050480,0irq/346-484840025789-21ssh23:55:561
10050480,0irq/346-484840010438-1kworker/1:0H22:40:041
10050480,0irq/346-48484000-21swapper/000:30:130
81470,0rcu_preempt8433-21meminfo20:29:040
81470,0rcu_preempt3-21ksoftirqd/019:54:060
81470,0rcu_preempt19-21ksoftirqd/119:34:211
10050470,0irq/346-484840081rcu_preempt22:04:000
81460,0rcu_preempt3-21ksoftirqd/019:04:020
81460,0rcu_preempt3-21ksoftirqd/019:04:020
81460,0rcu_preempt19-21ksoftirqd/120:01:341
81460,0rcu_preempt10247-21kworker/1:120:54:021
9950450,0irq/345-484840012611-21php-cgi19:04:001
9950450,0irq/345-484840012611-21php-cgi19:04:001
81450,0rcu_preempt3-21ksoftirqd/020:53:550
81450,0rcu_preempt19-21ksoftirqd/119:19:041
10050450,0irq/346-484840023765-1kworker/1:1H21:13:391
10050450,0irq/346-484840023411-1kworker/1:1H19:44:471
10050450,0irq/346-484840023411-1kworker/1:1H19:44:471
10050450,0irq/346-48484000-21swapper/023:28:520
81440,0rcu_preempt3-21ksoftirqd/019:59:110
81440,0rcu_preempt19-21ksoftirqd/121:04:091
81440,0rcu_preempt19-21ksoftirqd/120:44:091
81440,0rcu_preempt19-21ksoftirqd/120:29:041
81440,0rcu_preempt10071-21meminfo20:34:041
1385999445,0cyclictest18509-1kworker/0:1H19:20:430
81430,0rcu_preempt3-21ksoftirqd/020:03:580
81430,0rcu_preempt3-21ksoftirqd/019:14:090
81430,0rcu_preempt3-21ksoftirqd/019:09:040
81430,0rcu_preempt29920-21ping20:14:030
81430,0rcu_preempt19-21ksoftirqd/119:25:191
81430,0rcu_preempt11339-21df_abs20:38:570
81420,0rcu_preempt5312-21ps20:19:110
81420,0rcu_preempt1504-21diskstats20:09:000
81410,0rcu_preempt19-21ksoftirqd/120:59:001
81410,0rcu_preempt17147-21ping19:29:121
81410,0rcu_preempt15479-21users20:49:101
9950400,0irq/345-484840026700-1kworker/0:2H19:49:010
81400,0rcu_preempt19-21ksoftirqd/119:15:021
81390,0rcu_preempt19-21ksoftirqd/119:09:031
13859993913,0cyclictest0-21swapper/019:29:080
81380,0rcu_preempt3-21ksoftirqd/020:44:060
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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