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2026-04-17 - 15:27

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 792 highest latencies:
System rackaslot5s.osadl.org (updated Fri Apr 17, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81770,0rcu_preempt6060-21kworker/0:011:32:460
81770,0rcu_preempt3-21ksoftirqd/011:38:180
81760,0rcu_preempt9836-21kworker/0:110:47:010
81760,0rcu_preempt26845-21kworker/0:209:49:480
81750,0rcu_preempt9836-21kworker/0:109:33:290
81750,0rcu_preempt3-21ksoftirqd/010:08:460
81740,0rcu_preempt20134-21kworker/0:107:53:490
81730,0rcu_preempt3-21ksoftirqd/009:25:260
81730,0rcu_preempt2091-21kworker/0:209:22:200
81730,0rcu_preempt2091-21kworker/0:209:22:200
81710,0rcu_preempt24569-21kworker/u4:011:47:270
81710,0rcu_preempt11642-21kworker/0:008:38:520
81700,0rcu_preempt3-21ksoftirqd/008:23:550
81700,0rcu_preempt24569-21kworker/u4:011:20:330
81700,0rcu_preempt22608-21ssh12:21:320
81690,0rcu_preempt3290-21ping07:58:530
81690,0rcu_preempt3-21ksoftirqd/011:43:190
81690,0rcu_preempt23395-21kworker/0:012:25:220
81690,0rcu_preempt20355-21kworker/0:011:14:180
81690,0rcu_preempt20355-21kworker/0:010:40:450
81680,0rcu_preempt9769-21df_abs12:08:410
81680,0rcu_preempt3-21ksoftirqd/011:58:460
81680,0rcu_preempt3-21ksoftirqd/011:50:160
81680,0rcu_preempt3-21ksoftirqd/009:53:550
81680,0rcu_preempt28082-21ssh10:15:130
81680,0rcu_preempt28082-21ssh10:15:130
81680,0rcu_preempt26976-21ssh09:41:270
81680,0rcu_preempt26845-21kworker/0:210:02:190
81680,0rcu_preempt26557-21kworker/0:210:53:190
81680,0rcu_preempt15490-21kworker/0:010:20:450
81680,0rcu_preempt0-21swapper/009:09:490
81670,0rcu_preempt5470-21ssh10:25:060
81670,0rcu_preempt3-21ksoftirqd/012:13:420
81670,0rcu_preempt3-21ksoftirqd/010:05:240
81670,0rcu_preempt3-21ksoftirqd/008:13:430
81670,0rcu_preempt3-21ksoftirqd/008:09:200
81670,0rcu_preempt3-21ksoftirqd/008:03:290
81670,0rcu_preempt20134-21kworker/0:107:40:280
81670,0rcu_preempt1302-21kworker/0:012:34:200
81660,0rcu_preempt3-21ksoftirqd/012:32:030
81660,0rcu_preempt3-21ksoftirqd/011:12:110
81660,0rcu_preempt3-21ksoftirqd/011:12:110
81660,0rcu_preempt3-21ksoftirqd/010:58:430
81660,0rcu_preempt3-21ksoftirqd/010:53:510
81660,0rcu_preempt3-21ksoftirqd/009:32:200
81660,0rcu_preempt29385-21taskset11:55:130
81660,0rcu_preempt0-21swapper/011:05:450
81650,0rcu_preempt3-21ksoftirqd/012:07:260
81650,0rcu_preempt3-21ksoftirqd/010:33:500
81650,0rcu_preempt3-21ksoftirqd/009:48:260
81650,0rcu_preempt3-21ksoftirqd/008:48:380
10050650,0irq/346-484840054-21kswapd010:33:421
81640,0rcu_preempt54-21kswapd008:37:030
81640,0rcu_preempt3-21ksoftirqd/009:13:430
81640,0rcu_preempt0-21swapper/010:29:230
81630,0rcu_preempt3-21ksoftirqd/011:23:530
81630,0rcu_preempt3-21ksoftirqd/007:14:110
81620,0rcu_preempt3-21ksoftirqd/009:03:430
81620,0rcu_preempt3-21ksoftirqd/008:43:510
81620,0rcu_preempt3-21ksoftirqd/008:28:510
81620,0rcu_preempt3-21ksoftirqd/008:18:550
81620,0rcu_preempt3-21ksoftirqd/007:48:480
81620,0rcu_preempt3-21ksoftirqd/007:30:490
81620,0rcu_preempt3-21ksoftirqd/007:26:280
81610,0rcu_preempt3-21ksoftirqd/008:58:470
81610,0rcu_preempt3-21ksoftirqd/008:53:540
81610,0rcu_preempt3-21ksoftirqd/007:37:090
81610,0rcu_preempt3-21ksoftirqd/007:21:560
81610,0rcu_preempt3-21ksoftirqd/007:08:460
81600,0rcu_preempt3-21ksoftirqd/007:43:440
10050600,0irq/346-48484004226-1kworker/1:0H12:37:431
10050540,0irq/346-484840010543-1kworker/1:1H10:31:091
10050530,0irq/346-484840054-21kswapd011:19:141
10050530,0irq/346-484840018251-1kworker/1:2H10:06:081
10050510,0irq/346-48484007686-1kworker/1:3H11:02:041
10050510,0irq/346-484840054-21kswapd012:11:171
10050500,0irq/346-484840028118-1kworker/1:3H10:16:571
10050500,0irq/346-484840028118-1kworker/1:3H10:16:571
10050500,0irq/346-484840014802-1kworker/1:0H11:43:471
9950490,0irq/345-484840010543-1kworker/1:1H10:45:201
10050490,0irq/346-484840054-21kswapd010:41:461
9950480,0irq/345-4848400851-21rngd10:09:311
81470,0rcu_preempt3-21ksoftirqd/007:03:480
10050470,0irq/346-484840054-21kswapd011:57:501
10050470,0irq/346-484840054-21kswapd011:42:281
10050470,0irq/346-484840054-21kswapd007:49:521
10050470,0irq/346-484840023202-21sh09:37:591
9950460,0irq/345-48484008407-1kworker/1:0H09:55:341
81460,0rcu_preempt19-21ksoftirqd/111:58:381
10050460,0irq/346-484840054-21kswapd011:28:101
10050460,0irq/346-48484002801-21df_inode11:28:431
10050460,0irq/346-484840012630-1kworker/1:0H11:08:191
81450,0rcu_preempt19-21ksoftirqd/108:13:581
9950440,0irq/345-484840054-21kswapd008:23:461
9950440,0irq/345-484840022737-21ping07:38:471
81440,0rcu_preempt19-21ksoftirqd/107:07:361
10050440,0irq/346-484840054-21kswapd010:54:541
10050440,0irq/346-484840015887-21sed10:03:291
10050440,0irq/346-48484000-21swapper/109:48:261
9950430,0irq/345-48484000-21swapper/110:53:131
10050430,0irq/346-4848400851-21rngd11:11:171
10050430,0irq/346-4848400851-21rngd11:11:171
10050430,0irq/346-4848400851-21rngd09:28:101
10050430,0irq/346-484840014600-1kworker/1:0H08:35:001
81420,0rcu_preempt19-21ksoftirqd/112:29:431
81420,0rcu_preempt19-21ksoftirqd/112:20:121
81420,0rcu_preempt19-21ksoftirqd/107:36:531
10050420,0irq/346-48484004863-21meminfo09:18:501
10050420,0irq/346-48484004863-21meminfo09:18:501
10050420,0irq/346-484840024080-21df_abs09:38:421
81410,0rcu_preempt19-21ksoftirqd/108:08:481
10050410,0irq/346-48484007768-21uniq11:33:451
10050410,0irq/346-484840026841-21wget09:08:411
10050410,0irq/346-48484000-21swapper/111:49:451
10050410,0irq/346-48484000-21swapper/109:49:591
81400,0rcu_preempt19-21ksoftirqd/111:13:431
10050400,0irq/346-484840081rcu_preempt12:27:201
10050400,0irq/346-48484005430-21ssh12:03:521
81390,0rcu_preempt19-21ksoftirqd/112:18:281
10050390,0irq/346-48484003601-21ssh09:18:061
10050390,0irq/346-484840031538-21ssh10:18:501
10050390,0irq/346-484840014135-21ssh09:28:411
81380,0rcu_preempt54-21kswapd008:53:471
9950370,0irq/345-484840022737-21ping07:19:481
1699360,0migration/15063-21runrttasks08:03:101
1699360,0migration/14058-21munin-node1
10050350,0irq/346-484840020114-21wget08:48:381
10050350,0irq/346-484840019633-21wget07:08:401
179372340,0chrt17901-1kworker/1:0H08:40:251
10050340,0irq/346-48484000-21swapper/108:18:561
10050330,0irq/346-48484005245-21munin-node1
9950320,0irq/345-48484000-21swapper/109:08:281
10050320,0irq/346-48484002449-21irqstats07:53:491
10050320,0irq/346-484840022737-21ping07:23:551
10050320,0irq/346-484840019457-21cyclictest07:31:531
10050320,0irq/346-48484000-21swapper/108:58:401
325382310,0sleep132320-1kworker/1:1H07:48:091
13250310,0irq/301-480200017901-1kworker/1:0H08:43:411
81300,0rcu_preempt54-21kswapd007:13:411
9950280,0irq/345-48484000-21swapper/108:32:071
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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