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2026-05-24 - 18:35

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 Sun May 24, 2026 12:43:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811060,0rcu_preempt19-21ksoftirqd/108:23:191
10050760,0irq/346-484840029785-1kworker/0:0H11:39:580
10050750,0irq/346-48484004330-1kworker/0:1H12:20:030
10050750,0irq/346-484840027763-1kworker/0:0H11:00:120
81740,0rcu_preempt8037-21apt-get08:48:030
81740,0rcu_preempt3-21ksoftirqd/010:38:090
10050720,0irq/346-484840012190-1kworker/0:0H11:58:310
81710,0rcu_preempt3-21ksoftirqd/009:19:540
81710,0rcu_preempt3-21ksoftirqd/009:19:540
746899714,0cyclictest0-21swapper/011:44:380
10050710,0irq/346-48484009255-1kworker/0:2H12:24:030
10050700,0irq/346-48484007309-1kworker/0:1H10:45:020
81690,0rcu_preempt27307-21apt-get08:08:040
81680,0rcu_preempt19-21ksoftirqd/107:18:101
746899681,0cyclictest239232sleep012:35:060
10050680,0irq/346-48484002431-1kworker/0:2H10:36:270
746899664,0cyclictest17182-1kworker/0:2H10:50:450
81650,0rcu_preempt4755-21apt-get08:38:020
81650,0rcu_preempt3-21ksoftirqd/010:03:100
81650,0rcu_preempt3-21ksoftirqd/009:13:180
81650,0rcu_preempt27302-21chrt09:53:190
746899652,0cyclictest0-21swapper/010:20:460
746899651,0cyclictest0-21swapper/011:15:440
81640,0rcu_preempt9116-1kworker/0:2H09:43:190
746899647,0cyclictest0-21swapper/011:53:070
746899643,0cyclictest0-21swapper/011:49:010
746899642,0cyclictest30177-21ssh09:23:150
746899641,0cyclictest26907-1kworker/0:1H12:05:590
746899641,0cyclictest1740-21apt-get12:13:040
81630,0rcu_preempt16438-21wc09:42:530
81620,0rcu_preempt3-21ksoftirqd/007:48:060
746899626,0cyclictest18946-1kworker/0:1H10:17:490
746899621,0cyclictest25038-21ssh09:51:210
746899621,0cyclictest22357-21apt-get11:28:040
746899621,0cyclictest0-21swapper/011:26:290
81610,0rcu_preempt3-21ksoftirqd/009:33:100
81610,0rcu_preempt3-21ksoftirqd/007:13:150
746899619,0cyclictest2219-21df_inode09:28:080
746899612,0cyclictest0-21swapper/011:02:580
81600,0rcu_preempt3-21ksoftirqd/010:53:170
746899602,0cyclictest29938-21runrttasks11:35:150
746899596,0cyclictest26833-1kworker/0:2H08:07:520
746899592,0cyclictest30231-21munin-node0
10050590,0irq/346-484840054-21kswapd012:30:341
10050590,0irq/346-484840054-21kswapd009:57:531
7468995815,0cyclictest16673-21munin-node0
746899581,0cyclictest9206-1kworker/0:1H09:08:090
746899581,0cyclictest9206-1kworker/0:1H09:08:090
746899581,0cyclictest3333-21munin-node0
746899581,0cyclictest11057-1kworker/0:0H10:12:240
746899578,0cyclictest0-21swapper/011:09:100
746899576,0cyclictest10050irq/346-484840009:58:090
746899572,0cyclictest0-21swapper/011:18:170
7468995710,0cyclictest24521-21munin-node0
10050570,0irq/346-484840025478-21unixbench_multi12:03:211
81560,0rcu_preempt3-21ksoftirqd/007:53:160
746899562,0cyclictest0-21swapper/010:32:180
746899562,0cyclictest0-21swapper/007:58:080
746899562,0cyclictest0-21swapper/007:18:160
81550,0rcu_preempt3-21ksoftirqd/008:54:090
746899556,0cyclictest0-21swapper/007:38:170
746899552,0cyclictest15336-1kworker/0:1H07:33:290
746899552,0cyclictest10749-21ping07:28:040
746899552,0cyclictest10749-21ping07:23:050
746899552,0cyclictest0-21swapper/008:18:040
81540,0rcu_preempt3-21ksoftirqd/008:43:110
746899542,0cyclictest10749-21ping07:43:040
746899542,0cyclictest0-21swapper/009:03:210
81530,0rcu_preempt19-21ksoftirqd/111:21:381
746899532,0cyclictest0-21swapper/008:23:050
10050530,0irq/346-484840054-21kswapd012:12:451
10050530,0irq/346-484840021880-1kworker/1:0H09:18:391
10050530,0irq/346-484840021880-1kworker/1:0H09:18:391
81520,0rcu_preempt19-21ksoftirqd/110:13:461
746899526,0cyclictest29623-21ntp_states08:13:200
746899522,0cyclictest0-21swapper/008:58:120
746899521,0cyclictest7897-21seq07:08:080
746899521,0cyclictest1784-21munin-node0
10050520,0irq/346-484840054-21kswapd010:20:561
10050520,0irq/346-484840026796-1kworker/1:2H09:24:201
81510,0rcu_preempt7653-21apt-get11:13:041
81510,0rcu_preempt19-21ksoftirqd/107:28:181
10050510,0irq/346-484840024868-1kworker/1:2H11:33:411
81500,0rcu_preempt19-21ksoftirqd/109:28:171
10050500,0irq/346-484840025037-21ssh10:57:521
81490,0rcu_preempt19-21ksoftirqd/111:58:141
81490,0rcu_preempt19-21ksoftirqd/108:18:031
81490,0rcu_preempt19-21ksoftirqd/108:08:231
81490,0rcu_preempt19-21ksoftirqd/108:02:541
10050490,0irq/346-484840028297-21ssh10:28:041
81480,0rcu_preempt5961-21apt-get07:03:040
81480,0rcu_preempt14456-21diskmemload11:38:181
10050480,0irq/346-48484003181-1kworker/1:2H10:38:191
10050480,0irq/346-484840019-21ksoftirqd/109:35:571
9950470,0irq/345-484840032684-1kworker/1:1H11:06:211
81470,0rcu_preempt23678-21ping07:58:181
81470,0rcu_preempt19-21ksoftirqd/112:33:081
81470,0rcu_preempt19-21ksoftirqd/110:23:261
81470,0rcu_preempt19-21ksoftirqd/107:57:281
81470,0rcu_preempt19-21ksoftirqd/107:13:041
81460,0rcu_preempt19-21ksoftirqd/111:08:091
10050460,0irq/346-48484006535-21ssh11:44:091
10050460,0irq/346-484840017097-1kworker/1:2H11:56:591
10050460,0irq/346-484840011997-21ssh11:49:501
81450,0rcu_preempt31918-21ssh09:58:131
81450,0rcu_preempt2436-21meminfo12:13:151
81450,0rcu_preempt19-21ksoftirqd/111:28:101
81450,0rcu_preempt19-21ksoftirqd/109:08:031
81450,0rcu_preempt19-21ksoftirqd/109:08:031
81450,0rcu_preempt14456-21diskmemload11:26:141
81450,0rcu_preempt0-21swapper/111:01:341
10050450,0irq/346-484840054-21kswapd012:24:391
81440,0rcu_preempt19-21ksoftirqd/108:17:531
81440,0rcu_preempt19-21ksoftirqd/107:33:241
81440,0rcu_preempt19-21ksoftirqd/107:23:251
81440,0rcu_preempt14456-21diskmemload10:07:131
81440,0rcu_preempt14456-21diskmemload09:50:111
81440,0rcu_preempt14456-21diskmemload09:38:011
81440,0rcu_preempt10749-21ping07:38:051
10050430,0irq/346-484840016924-21diskstats09:43:081
10050430,0irq/346-484840011056-1kworker/1:0H10:12:391
81420,0rcu_preempt54-21kswapd008:48:171
81420,0rcu_preempt19-21ksoftirqd/108:28:141
81420,0rcu_preempt19-21ksoftirqd/107:43:141
81420,0rcu_preempt15303-21ssh10:47:531
10050420,0irq/346-48484008495-21ssh12:19:091
10050420,0irq/346-484840016484-1kworker/1:2H10:49:191
81410,0rcu_preempt7467-21cyclictest08:38:191
81410,0rcu_preempt2020-21users10:33:211
81410,0rcu_preempt19-21ksoftirqd/109:12:561
81410,0rcu_preempt19-21ksoftirqd/107:08:031
81400,0rcu_preempt19-21ksoftirqd/108:58:051
9950390,0irq/345-48484003349-21cut08:33:091
81390,0rcu_preempt19-21ksoftirqd/108:43:171
81390,0rcu_preempt19-21ksoftirqd/107:48:181
81390,0rcu_preempt19-21ksoftirqd/107:04:051
81390,0rcu_preempt10846-1kworker/1:1H08:57:031
81380,0rcu_preempt19-21ksoftirqd/109:03:041
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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