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2026-05-04 - 01:25

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 100 highest latencies:
System rackaslot5s.osadl.org (updated Sun May 03, 2026 12:43:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811000,0rcu_preempt19-21ksoftirqd/110:22:401
811000,0rcu_preempt19-21ksoftirqd/110:22:401
81920,0rcu_preempt19-21ksoftirqd/111:03:141
81900,0rcu_preempt19-21ksoftirqd/110:27:291
81870,0rcu_preempt26527-21runrttasks10:11:501
81870,0rcu_preempt19-21ksoftirqd/108:53:261
81830,0rcu_preempt19-21ksoftirqd/112:25:351
81820,0rcu_preempt19-21ksoftirqd/108:10:541
81800,0rcu_preempt19-21ksoftirqd/112:01:581
81800,0rcu_preempt19-21ksoftirqd/108:14:501
81790,0rcu_preempt19-21ksoftirqd/109:03:381
81780,0rcu_preempt19-21ksoftirqd/108:38:241
81770,0rcu_preempt19-21ksoftirqd/111:23:231
81770,0rcu_preempt14779-21ssh11:38:251
81760,0rcu_preempt54-21kswapd008:58:391
81760,0rcu_preempt19-21ksoftirqd/108:18:351
81750,0rcu_preempt19-21ksoftirqd/108:28:291
81740,0rcu_preempt19-21ksoftirqd/109:38:301
81730,0rcu_preempt19-21ksoftirqd/112:16:021
81720,0rcu_preempt19-21ksoftirqd/109:58:401
81710,0rcu_preempt19-21ksoftirqd/112:08:241
81710,0rcu_preempt19-21ksoftirqd/110:58:061
81710,0rcu_preempt19-21ksoftirqd/110:43:321
81690,0rcu_preempt19-21ksoftirqd/111:48:301
81690,0rcu_preempt19-21ksoftirqd/110:38:241
81680,0rcu_preempt19-21ksoftirqd/109:43:301
81670,0rcu_preempt19-21ksoftirqd/111:10:321
81660,0rcu_preempt0-21swapper/111:54:471
81630,0rcu_preempt19-21ksoftirqd/112:07:381
81630,0rcu_preempt19-21ksoftirqd/112:07:381
81600,0rcu_preempt19-21ksoftirqd/108:49:311
81590,0rcu_preempt19-21ksoftirqd/109:23:561
81570,0rcu_preempt19-21ksoftirqd/108:43:321
81560,0rcu_preempt19-21ksoftirqd/110:48:311
81560,0rcu_preempt19-21ksoftirqd/110:48:311
81550,0rcu_preempt9780-21apt-get11:33:231
81550,0rcu_preempt9780-21apt-get11:33:231
81550,0rcu_preempt4899-21ping08:03:130
81550,0rcu_preempt19-21ksoftirqd/109:28:371
81550,0rcu_preempt19-21ksoftirqd/107:48:251
81550,0rcu_preempt19-21ksoftirqd/107:29:061
21251995512,0cyclictest0-21swapper/011:53:470
21251995511,0cyclictest24268-1kworker/0:2H12:34:190
81540,0rcu_preempt3-21ksoftirqd/010:47:220
81540,0rcu_preempt19-21ksoftirqd/112:28:491
81540,0rcu_preempt19-21ksoftirqd/111:43:241
81540,0rcu_preempt19-21ksoftirqd/111:19:011
81540,0rcu_preempt19-21ksoftirqd/109:19:241
21251995415,0cyclictest27646-1kworker/0:1H09:41:490
21251995411,0cyclictest0-21swapper/009:54:370
81530,0rcu_preempt19-21ksoftirqd/109:48:571
81530,0rcu_preempt19-21ksoftirqd/109:48:571
81530,0rcu_preempt19-21ksoftirqd/107:25:301
21251995319,0cyclictest11271-21munin-node0
21251995313,0cyclictest0-21swapper/010:33:430
81520,0rcu_preempt19-21ksoftirqd/110:03:341
81520,0rcu_preempt19-21ksoftirqd/109:12:151
81520,0rcu_preempt19-21ksoftirqd/107:22:451
81520,0rcu_preempt19-21ksoftirqd/107:22:451
21251995220,0cyclictest10923-21apt-get09:23:260
81510,0rcu_preempt4899-21ping07:58:331
81510,0rcu_preempt22608-21df_abs11:13:271
81510,0rcu_preempt19-21ksoftirqd/108:33:321
81510,0rcu_preempt19-21ksoftirqd/107:37:591
81510,0rcu_preempt19-21ksoftirqd/107:37:591
2125199519,0cyclictest0-21swapper/010:03:410
2125199518,0cyclictest0-21swapper/011:14:150
21251995117,0cyclictest8612-21timerwakeupswit10:58:410
21251995117,0cyclictest8612-21timerwakeupswit10:58:410
21251995114,0cyclictest22153-21if_err_eth008:48:310
21251995111,0cyclictest0-21swapper/011:08:430
81500,0rcu_preempt19-21ksoftirqd/112:35:471
81500,0rcu_preempt19-21ksoftirqd/110:58:251
81500,0rcu_preempt19-21ksoftirqd/110:58:251
81500,0rcu_preempt19-21ksoftirqd/107:53:331
21251995022,0cyclictest20814-1kworker/0:0H12:18:130
21251995019,0cyclictest28436-21ssh09:08:170
21251995018,0cyclictest29929-1kworker/0:0H11:58:240
21251995017,0cyclictest28790-21switchtime10:13:390
21251995016,0cyclictest22272-1kworker/0:3H10:58:070
21251995016,0cyclictest0-21swapper/009:17:040
21251995012,0cyclictest0-21swapper/011:25:420
9950490,0irq/345-484840021760-21grep09:33:411
81490,0rcu_preempt3-21ksoftirqd/012:28:320
81490,0rcu_preempt19-21ksoftirqd/109:13:331
21251994920,0cyclictest0-21swapper/009:28:270
21251994919,0cyclictest8242-1kworker/0:0H08:08:240
21251994919,0cyclictest2534-21rm09:47:470
21251994918,0cyclictest9616-21ssh10:27:450
21251994917,0cyclictest15934-21ssh11:06:350
81480,0rcu_preempt3-21ksoftirqd/010:48:390
81480,0rcu_preempt3-21ksoftirqd/010:48:390
81480,0rcu_preempt2336-21kworker/dying07:08:310
81480,0rcu_preempt21250-21cyclictest11:28:231
81480,0rcu_preempt19745-21apt-get07:03:241
21251994827,0cyclictest27777-21awk12:23:380
21251994819,0cyclictest5046-21df11:28:270
21251994819,0cyclictest15211-21munin-node0
21251994818,0cyclictest29278-21ssh11:53:110
21251994817,0cyclictest21967-21apt-get12:18:230
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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