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2026-04-03 - 13:41

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 792 highest latencies:
System rackaslot5s.osadl.org (updated Fri Apr 03, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811360,0rcu_preempt3-21ksoftirqd/019:30:210
811220,0rcu_preempt3-21ksoftirqd/000:00:490
811190,0rcu_preempt3-21ksoftirqd/019:36:090
811080,0rcu_preempt3-21ksoftirqd/022:24:090
811060,0rcu_preempt3-21ksoftirqd/023:53:250
811050,0rcu_preempt19-21ksoftirqd/121:23:391
811030,0rcu_preempt17310-21kworker/0:121:28:560
811010,0rcu_preempt19-21ksoftirqd/119:03:591
81940,0rcu_preempt19-21ksoftirqd/119:18:511
81930,0rcu_preempt3-21ksoftirqd/021:09:110
81920,0rcu_preempt19-21ksoftirqd/121:46:011
81900,0rcu_preempt25882-21kworker/0:119:49:050
81890,0rcu_preempt31709-21ntpq19:19:100
81880,0rcu_preempt54-21kswapd020:14:121
81880,0rcu_preempt19-21ksoftirqd/120:12:211
81860,0rcu_preempt3-21ksoftirqd/020:44:080
81840,0rcu_preempt3-21ksoftirqd/023:42:580
81840,0rcu_preempt3-21ksoftirqd/023:13:550
81840,0rcu_preempt3-21ksoftirqd/022:39:110
81820,0rcu_preempt3-21ksoftirqd/022:34:100
81820,0rcu_preempt3-21ksoftirqd/019:58:550
81790,0rcu_preempt3-21ksoftirqd/020:54:030
81780,0rcu_preempt3-21ksoftirqd/020:34:070
81770,0rcu_preempt3-21ksoftirqd/023:34:040
81770,0rcu_preempt3-21ksoftirqd/022:15:080
81770,0rcu_preempt12637-21dropbear00:03:570
81760,0rcu_preempt3-21ksoftirqd/022:04:440
81760,0rcu_preempt19-21ksoftirqd/123:24:041
81750,0rcu_preempt54-21kswapd000:18:170
81750,0rcu_preempt3-21ksoftirqd/022:58:250
81750,0rcu_preempt3-21ksoftirqd/000:26:480
81740,0rcu_preempt3-21ksoftirqd/023:03:470
81740,0rcu_preempt3-21ksoftirqd/020:19:090
81730,0rcu_preempt4674-21kworker/0:023:24:030
81730,0rcu_preempt3-21ksoftirqd/021:59:030
81730,0rcu_preempt3-21ksoftirqd/000:22:360
81720,0rcu_preempt3-21ksoftirqd/022:44:090
81720,0rcu_preempt3-21ksoftirqd/022:29:000
81720,0rcu_preempt3-21ksoftirqd/019:44:130
81720,0rcu_preempt19-21ksoftirqd/123:39:111
81720,0rcu_preempt19-21ksoftirqd/122:34:371
81720,0rcu_preempt19-21ksoftirqd/122:25:461
81720,0rcu_preempt19-21ksoftirqd/100:23:041
81710,0rcu_preempt3-21ksoftirqd/021:33:530
81710,0rcu_preempt3-21ksoftirqd/021:22:320
81710,0rcu_preempt3-21ksoftirqd/021:03:590
81700,0rcu_preempt3-21ksoftirqd/022:59:190
81700,0rcu_preempt3-21ksoftirqd/021:48:580
81700,0rcu_preempt3-21ksoftirqd/021:17:360
81690,0rcu_preempt0-21swapper/020:43:420
81680,0rcu_preempt3-21ksoftirqd/023:20:440
81680,0rcu_preempt3-21ksoftirqd/021:25:210
81680,0rcu_preempt3-21ksoftirqd/020:59:050
81670,0rcu_preempt3-21ksoftirqd/021:55:300
81670,0rcu_preempt3-21ksoftirqd/019:13:550
81670,0rcu_preempt19-21ksoftirqd/122:39:111
81650,0rcu_preempt3-21ksoftirqd/019:25:090
81650,0rcu_preempt3-21ksoftirqd/019:09:040
81650,0rcu_preempt3-21ksoftirqd/000:34:520
81650,0rcu_preempt19-21ksoftirqd/121:38:431
81630,0rcu_preempt3-21ksoftirqd/023:47:510
81630,0rcu_preempt0-21swapper/019:54:020
81620,0rcu_preempt3-21ksoftirqd/021:39:070
81620,0rcu_preempt19-21ksoftirqd/122:09:481
81610,0rcu_preempt3-21ksoftirqd/023:56:320
81610,0rcu_preempt3-21ksoftirqd/022:12:380
81610,0rcu_preempt19-21ksoftirqd/122:22:191
81600,0rcu_preempt3-21ksoftirqd/023:29:050
81600,0rcu_preempt3-21ksoftirqd/022:52:360
81600,0rcu_preempt3-21ksoftirqd/000:28:470
81590,0rcu_preempt3-21ksoftirqd/022:22:150
81590,0rcu_preempt3-21ksoftirqd/020:29:070
81590,0rcu_preempt16410-21kworker/0:021:47:010
81580,0rcu_preempt3-21ksoftirqd/020:13:560
81580,0rcu_preempt3-21ksoftirqd/019:38:590
81570,0rcu_preempt3-21ksoftirqd/023:09:000
81570,0rcu_preempt0-21swapper/020:27:080
10050570,0irq/346-484840017052-1kworker/0:2H00:08:490
81560,0rcu_preempt19-21ksoftirqd/100:17:101
81550,0rcu_preempt8651-21unixbench_singl23:59:101
81550,0rcu_preempt3-21ksoftirqd/020:49:020
10050530,0irq/346-484840027151-21sshd19:04:210
81510,0rcu_preempt3-21ksoftirqd/020:08:530
81510,0rcu_preempt3-21ksoftirqd/020:07:450
81490,0rcu_preempt19-21ksoftirqd/120:26:551
81480,0rcu_preempt30871-21ping19:43:531
81480,0rcu_preempt19-21ksoftirqd/120:03:261
81470,0rcu_preempt29910-1kworker/1:0H00:24:061
81470,0rcu_preempt19-21ksoftirqd/123:08:541
81470,0rcu_preempt19-21ksoftirqd/122:52:561
81470,0rcu_preempt19-21ksoftirqd/121:53:521
27591994732,0cyclictest7520-21munin-node1
27591994731,0cyclictest17210-21runrttasks21:23:541
81460,0rcu_preempt19-21ksoftirqd/123:46:111
81460,0rcu_preempt19-21ksoftirqd/100:30:361
27591994631,0cyclictest1519-21ssh22:13:531
27591994630,0cyclictest0-21swapper/100:03:541
81450,0rcu_preempt19-21ksoftirqd/123:36:511
81450,0rcu_preempt19-21ksoftirqd/121:35:391
81440,0rcu_preempt19-21ksoftirqd/123:54:071
81440,0rcu_preempt19-21ksoftirqd/123:30:091
81440,0rcu_preempt19-21ksoftirqd/121:49:051
27591994428,0cyclictest2180-21diskmemload23:48:541
27591994428,0cyclictest16487-21sh22:28:581
27591994427,0cyclictest10091-21apt-get19:53:531
27591994426,0cyclictest2180-21diskmemload23:03:081
81430,0rcu_preempt19-21ksoftirqd/122:04:101
81430,0rcu_preempt14277-21cron00:38:411
27591994329,0cyclictest22105-21ssh21:28:531
27591994329,0cyclictest1470-21runrttasks21:58:531
27591994328,0cyclictest5186-21apt-get19:38:531
27591994327,0cyclictest17325-21apt-get00:08:541
27591994314,0cyclictest1007-21dropbear20:38:551
81420,0rcu_preempt30871-21ping19:34:081
27591994227,0cyclictest30659-21runrttasks23:15:581
27591994226,0cyclictest2180-21diskmemload21:09:301
27591994226,0cyclictest13386-21apt-get20:03:531
27591994225,0cyclictest2180-21diskmemload23:22:561
27591994225,0cyclictest0-21swapper/120:58:521
27591994225,0cyclictest0-21swapper/120:53:521
81410,0rcu_preempt19-21ksoftirqd/123:03:551
27591994127,0cyclictest28626-21taskset20:49:001
27591994126,0cyclictest22085-21munin-node1
27591994126,0cyclictest2180-21diskmemload22:57:501
27591994125,0cyclictest9033-21munin-node1
27591994125,0cyclictest0-21swapper/122:43:541
27591994125,0cyclictest0-21swapper/119:13:531
27591994125,0cyclictest0-21swapper/119:08:531
27591994124,0cyclictest0-21swapper/120:43:531
81400,0rcu_preempt19-21ksoftirqd/121:06:141
81400,0rcu_preempt19-21ksoftirqd/120:38:211
27591994026,0cyclictest0-21swapper/120:23:021
81390,0rcu_preempt19-21ksoftirqd/119:29:081
27591993925,0cyclictest409-21ssh19:23:581
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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