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2026-08-04 - 23:55

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 Tue Aug 04, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81810,0rcu_preempt1976-21ssh12:36:100
81800,0rcu_preempt3-21ksoftirqd/010:45:520
81790,0rcu_preempt19-21ksoftirqd/109:26:551
81750,0rcu_preempt836-21rngd10:41:170
81750,0rcu_preempt3-21ksoftirqd/011:04:080
81740,0rcu_preempt3-21ksoftirqd/012:10:210
81740,0rcu_preempt3-21ksoftirqd/011:37:540
81740,0rcu_preempt3-21ksoftirqd/009:15:300
81730,0rcu_preempt3-21ksoftirqd/010:22:420
81720,0rcu_preempt3-21ksoftirqd/009:32:050
81710,0rcu_preempt3-21ksoftirqd/010:56:150
81710,0rcu_preempt3-21ksoftirqd/009:23:590
81710,0rcu_preempt19-21ksoftirqd/110:00:211
81700,0rcu_preempt3-21ksoftirqd/012:09:170
81700,0rcu_preempt3-21ksoftirqd/011:53:080
81700,0rcu_preempt3-21ksoftirqd/010:00:140
81700,0rcu_preempt3-21ksoftirqd/009:57:580
81700,0rcu_preempt3-21ksoftirqd/009:28:070
81690,0rcu_preempt3-21ksoftirqd/011:17:090
81690,0rcu_preempt3-21ksoftirqd/011:12:400
81690,0rcu_preempt3-21ksoftirqd/009:13:030
81680,0rcu_preempt3-21ksoftirqd/012:24:440
81680,0rcu_preempt3-21ksoftirqd/012:00:350
81680,0rcu_preempt3-21ksoftirqd/010:38:190
81680,0rcu_preempt3-21ksoftirqd/009:40:440
81670,0rcu_preempt3-21ksoftirqd/011:49:090
81670,0rcu_preempt3-21ksoftirqd/010:29:360
81670,0rcu_preempt19-21ksoftirqd/111:31:041
10050670,0irq/346-48484000-21swapper/012:29:440
81660,0rcu_preempt3-21ksoftirqd/012:30:040
81660,0rcu_preempt3-21ksoftirqd/012:30:040
81660,0rcu_preempt3-21ksoftirqd/010:05:530
81630,0rcu_preempt3-21ksoftirqd/012:15:120
81630,0rcu_preempt19-21ksoftirqd/110:10:231
81620,0rcu_preempt19-21ksoftirqd/111:40:151
81610,0rcu_preempt3-21ksoftirqd/011:20:100
234792610,0chrt10050irq/346-484840007:20:000
81600,0rcu_preempt3-21ksoftirqd/008:20:090
10050590,0irq/346-484840023413-1kworker/0:0H10:12:120
81580,0rcu_preempt3-21ksoftirqd/008:00:130
261972580,0chrt10050irq/346-484840007:25:370
81570,0rcu_preempt3-21ksoftirqd/009:38:590
81570,0rcu_preempt3-21ksoftirqd/008:10:080
81570,0rcu_preempt19-21ksoftirqd/107:39:551
81570,0rcu_preempt19-21ksoftirqd/107:39:551
81550,0rcu_preempt3-21ksoftirqd/008:09:540
81550,0rcu_preempt1172-21kworker/0:207:45:240
81540,0rcu_preempt19-21ksoftirqd/111:19:361
81540,0rcu_preempt19-21ksoftirqd/110:05:261
81530,0rcu_preempt3-21ksoftirqd/011:05:120
81530,0rcu_preempt23914-21apt-get09:00:070
10050530,0irq/346-484840023413-1kworker/0:0H10:16:100
81520,0rcu_preempt3-21ksoftirqd/011:44:270
81520,0rcu_preempt3-21ksoftirqd/011:30:560
81520,0rcu_preempt3-21ksoftirqd/010:50:220
81520,0rcu_preempt3-21ksoftirqd/010:31:590
81520,0rcu_preempt3-21ksoftirqd/009:45:200
81520,0rcu_preempt3-21ksoftirqd/008:35:060
81520,0rcu_preempt19-21ksoftirqd/111:54:401
81520,0rcu_preempt19-21ksoftirqd/108:02:401
81510,0rcu_preempt3-21ksoftirqd/008:30:090
81510,0rcu_preempt19-21ksoftirqd/110:27:101
81510,0rcu_preempt19-21ksoftirqd/108:16:121
81510,0rcu_preempt19-21ksoftirqd/108:16:121
81500,0rcu_preempt19-21ksoftirqd/109:21:141
81500,0rcu_preempt1593-21ssh09:50:070
81490,0rcu_preempt19-21ksoftirqd/111:58:141
81480,0rcu_preempt3810-21ping08:25:140
81480,0rcu_preempt3-21ksoftirqd/007:06:410
81480,0rcu_preempt19-21ksoftirqd/110:32:051
81470,0rcu_preempt8757-21kworker/0:008:15:070
81470,0rcu_preempt8757-21kworker/0:008:15:070
81470,0rcu_preempt6317-21kworker/1:011:35:201
81470,0rcu_preempt3-21ksoftirqd/008:40:150
81470,0rcu_preempt3-21ksoftirqd/007:55:080
81470,0rcu_preempt19550-21meminfo08:45:150
81470,0rcu_preempt19-21ksoftirqd/112:33:391
81470,0rcu_preempt19-21ksoftirqd/112:33:391
81470,0rcu_preempt19-21ksoftirqd/109:53:371
81470,0rcu_preempt19-21ksoftirqd/109:46:321
81470,0rcu_preempt19-21ksoftirqd/108:20:011
81470,0rcu_preempt19-21ksoftirqd/108:12:111
81470,0rcu_preempt14446-21apt-get09:30:061
10050470,0irq/346-484840029623-21runrttasks07:37:170
10050470,0irq/346-484840029623-21runrttasks07:37:170
81460,0rcu_preempt3-21ksoftirqd/011:28:060
81460,0rcu_preempt3-21ksoftirqd/008:50:210
81460,0rcu_preempt27260-21users11:55:260
81460,0rcu_preempt19-21ksoftirqd/112:26:071
81460,0rcu_preempt19-21ksoftirqd/112:15:181
81460,0rcu_preempt19-21ksoftirqd/111:03:041
81450,0rcu_preempt3-21ksoftirqd/007:30:240
81450,0rcu_preempt29672-21kworker/1:009:19:221
81450,0rcu_preempt19-21ksoftirqd/111:10:101
81450,0rcu_preempt19-21ksoftirqd/108:25:231
10050450,0irq/346-484840020914-21munin-node0
81440,0rcu_preempt21828-21apt-get07:15:070
81440,0rcu_preempt19-21ksoftirqd/110:50:221
81440,0rcu_preempt19-21ksoftirqd/110:24:071
81430,0rcu_preempt19-21ksoftirqd/112:22:491
81430,0rcu_preempt19-21ksoftirqd/110:42:201
81430,0rcu_preempt19-21ksoftirqd/109:55:071
81430,0rcu_preempt19-21ksoftirqd/109:35:151
81430,0rcu_preempt19-21ksoftirqd/108:05:471
81430,0rcu_preempt0-21swapper/109:40:471
10050430,0irq/346-484840022618-21munin-node0
81420,0rcu_preempt19-21ksoftirqd/112:09:101
81420,0rcu_preempt19-21ksoftirqd/111:05:221
81420,0rcu_preempt19-21ksoftirqd/110:39:491
81410,0rcu_preempt3-21ksoftirqd/007:50:170
81410,0rcu_preempt27031-21diskmemload11:23:061
81410,0rcu_preempt19-21ksoftirqd/112:11:111
81410,0rcu_preempt19-21ksoftirqd/110:15:091
81410,0rcu_preempt19-21ksoftirqd/108:55:081
81410,0rcu_preempt19-21ksoftirqd/107:19:551
81410,0rcu_preempt19-21ksoftirqd/107:10:211
2004399411,0cyclictest23322-21ping07:41:330
81400,0rcu_preempt19-21ksoftirqd/112:37:111
81400,0rcu_preempt19-21ksoftirqd/111:25:261
81400,0rcu_preempt19-21ksoftirqd/108:35:301
81400,0rcu_preempt19-21ksoftirqd/107:57:391
81400,0rcu_preempt19-21ksoftirqd/107:53:511
10050400,0irq/346-484840025762-21munin-node0
81390,0rcu_preempt19-21ksoftirqd/112:01:401
81390,0rcu_preempt19-21ksoftirqd/111:45:221
81390,0rcu_preempt19-21ksoftirqd/108:41:461
81380,0rcu_preempt19-21ksoftirqd/110:56:231
81380,0rcu_preempt19-21ksoftirqd/110:45:191
81380,0rcu_preempt19-21ksoftirqd/109:10:301
81380,0rcu_preempt19-21ksoftirqd/109:09:411
81380,0rcu_preempt19-21ksoftirqd/109:00:061
81380,0rcu_preempt19-21ksoftirqd/108:54:041
81370,0rcu_preempt19-21ksoftirqd/108:45:311
81370,0rcu_preempt19-21ksoftirqd/108:31:171
13250370,0irq/301-48020000-21swapper/107:05:101
314892360,0sleep131207-1kworker/1:0H07:44:331
81350,0rcu_preempt19-21ksoftirqd/107:48:071
81340,0rcu_preempt19-21ksoftirqd/107:30:131
81340,0rcu_preempt19-21ksoftirqd/107:25:441
81320,0rcu_preempt19-21ksoftirqd/107:20:151
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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