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2025-09-16 - 16:29

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 100 highest latencies:
System rackaslot5s.osadl.org (updated Tue Sep 16, 2025 12:43:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811100,0rcu_preempt3-21ksoftirqd/011:56:390
811090,0rcu_preempt3-21ksoftirqd/011:00:050
811040,0rcu_preempt3-21ksoftirqd/012:33:440
811010,0rcu_preempt3-21ksoftirqd/012:06:110
81950,0rcu_preempt20220-21ping08:20:581
81940,0rcu_preempt3-21ksoftirqd/010:31:080
81910,0rcu_preempt3-21ksoftirqd/011:06:090
81760,0rcu_preempt3-21ksoftirqd/011:13:390
81750,0rcu_preempt3-21ksoftirqd/008:41:040
81740,0rcu_preempt3-21ksoftirqd/012:14:190
81740,0rcu_preempt3-21ksoftirqd/012:14:190
81740,0rcu_preempt3-21ksoftirqd/011:47:090
81740,0rcu_preempt19-21ksoftirqd/109:10:531
81730,0rcu_preempt3-21ksoftirqd/010:36:290
81730,0rcu_preempt3-21ksoftirqd/010:36:290
81720,0rcu_preempt3-21ksoftirqd/010:25:430
81720,0rcu_preempt3-21ksoftirqd/010:07:160
81720,0rcu_preempt3-21ksoftirqd/009:57:300
81720,0rcu_preempt3-21ksoftirqd/009:57:300
81720,0rcu_preempt3-21ksoftirqd/009:21:130
10050720,0irq/346-484840032185-1kworker/1:3H11:51:141
81710,0rcu_preempt3-21ksoftirqd/010:55:300
81700,0rcu_preempt3-21ksoftirqd/010:01:350
81690,0rcu_preempt3-21ksoftirqd/010:22:060
81680,0rcu_preempt3-21ksoftirqd/012:21:270
81680,0rcu_preempt3-21ksoftirqd/011:43:190
81680,0rcu_preempt3-21ksoftirqd/011:27:200
81670,0rcu_preempt3-21ksoftirqd/011:31:150
81670,0rcu_preempt3-21ksoftirqd/011:04:190
81670,0rcu_preempt3-21ksoftirqd/009:35:150
81660,0rcu_preempt9705-21grep11:20:420
81660,0rcu_preempt24662-21runrttasks08:06:130
401699666,0cyclictest31938-1kworker/0:2H10:46:000
81650,0rcu_preempt19-21ksoftirqd/108:16:021
81640,0rcu_preempt3-21ksoftirqd/012:19:350
81640,0rcu_preempt31677-21apt-get09:35:560
4016996410,0cyclictest26761-1kworker/0:0H10:17:360
401699631,0cyclictest1075750munin-node0
81620,0rcu_preempt9768-21df_inode09:00:580
81620,0rcu_preempt3-21ksoftirqd/009:41:040
401699622,0cyclictest4650-21munin-node0
10050620,0irq/346-484840011712-1kworker/1:3H11:25:191
4016996117,0cyclictest4874-21fschecks_time08:46:000
81600,0rcu_preempt24828-21apt-get09:25:540
401699602,0cyclictest11050-1kworker/0:0H09:05:590
401699601,0cyclictest1294-21ssh11:52:110
401699596,0cyclictest14050-21ssh10:41:080
4016995916,0cyclictest0-21swapper/009:15:410
4016995913,0cyclictest21878-21rm11:36:100
10050590,0irq/346-48484005857-1kworker/1:1H10:35:471
10050590,0irq/346-48484005857-1kworker/1:1H10:35:471
10050590,0irq/346-484840054-21kswapd009:55:511
10050590,0irq/346-484840054-21kswapd009:55:511
81580,0rcu_preempt3-21ksoftirqd/011:21:040
81580,0rcu_preempt3-21ksoftirqd/008:35:580
401699581,0cyclictest20042-21ssh09:18:070
81570,0rcu_preempt3-21ksoftirqd/008:56:030
81570,0rcu_preempt20220-21ping08:00:411
4016995716,0cyclictest26621-21ssh10:15:230
401699571,0cyclictest20220-21ping08:16:030
10050570,0irq/346-484840054-21kswapd010:59:391
10050570,0irq/346-484840026538-1kworker/1:1H11:47:281
10050570,0irq/346-484840019560-1kworker/1:2H09:17:231
81560,0rcu_preempt3-21ksoftirqd/012:28:260
81560,0rcu_preempt3-21ksoftirqd/008:05:120
81560,0rcu_preempt3-21ksoftirqd/008:05:120
81560,0rcu_preempt28502-21kworker/0:208:21:060
81560,0rcu_preempt13599-21kworker/0:207:34:400
401699562,0cyclictest20601-21munin-node0
401699562,0cyclictest0-21swapper/009:50:570
81550,0rcu_preempt3-21ksoftirqd/008:11:140
401699559,0cyclictest8575-21ssh12:01:590
401699552,0cyclictest17217-21ls07:45:420
4016995513,0cyclictest6216-21ssh09:46:030
401699551,0cyclictest3-21ksoftirqd/007:16:010
81540,0rcu_preempt3-21ksoftirqd/008:54:260
81540,0rcu_preempt19-21ksoftirqd/107:36:011
10050540,0irq/346-484840054-21kswapd010:41:351
9950530,0irq/345-48484000-21swapper/110:33:151
401699532,0cyclictest19896-21unixbench_multi07:51:090
401699532,0cyclictest0-21swapper/007:11:150
4016995313,0cyclictest0-21swapper/007:46:150
401699531,0cyclictest9289-21sh07:20:590
401699531,0cyclictest9289-21sh07:20:590
401699527,0cyclictest30645-21df_abs08:25:580
401699522,0cyclictest0-21swapper/008:31:090
401699512,0cyclictest7305-21ping07:35:560
10050510,0irq/346-484840054-21kswapd011:11:531
10050510,0irq/346-484840029198-21ssh12:29:371
81500,0rcu_preempt54-21kswapd007:41:091
10050500,0irq/346-484840023999-21ssh09:24:291
81490,0rcu_preempt3-21ksoftirqd/007:00:580
10050490,0irq/346-484840018898-21ssh10:47:221
81480,0rcu_preempt27784-21runrttasks11:45:161
81480,0rcu_preempt2725-21diskstats07:00:551
10050480,0irq/346-48484000-21swapper/110:52:111
10050480,0irq/346-48484000-21swapper/107:51:011
81470,0rcu_preempt26021-1kworker/1:0H10:15:531
81460,0rcu_preempt7305-21ping07:15:551
9950450,0irq/345-484840021380-1kworker/1:4H10:09:381
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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