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2026-06-17 - 21:28

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 Wed Jun 17, 2026 12:43:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81970,0rcu_preempt19-21ksoftirqd/109:53:341
81830,0rcu_preempt19-21ksoftirqd/111:46:271
10050700,0irq/346-48484004484-1kworker/0:0H10:34:080
81680,0rcu_preempt1470-21runrttasks12:31:120
81660,0rcu_preempt3-21ksoftirqd/009:17:460
81660,0rcu_preempt3-21ksoftirqd/007:57:530
13034996626,0cyclictest13504-21sshd11:11:450
81650,0rcu_preempt19-21ksoftirqd/109:32:291
13034996526,0cyclictest29629-1kworker/0:1H10:09:100
13034996523,0cyclictest5768-21ssh11:36:370
81640,0rcu_preempt19-21ksoftirqd/109:43:451
13034996428,0cyclictest8865-21munin-node0
13034996421,0cyclictest0-21swapper/009:33:390
13034996419,0cyclictest21749-1kworker/0:0H11:21:430
81630,0rcu_preempt3-21ksoftirqd/012:02:530
81630,0rcu_preempt19-21ksoftirqd/110:17:561
81630,0rcu_preempt19-21ksoftirqd/108:37:401
13034996328,0cyclictest21568-21apt-get11:52:400
13034996328,0cyclictest17883-21ssh12:21:270
13034996325,0cyclictest7107-1kworker/0:2H10:01:210
13034996324,0cyclictest6545-1kworker/0:2H12:12:370
13034996320,0cyclictest0-21swapper/011:06:070
81610,0rcu_preempt19-21ksoftirqd/109:37:341
13034996128,0cyclictest25469-21ntpq10:17:540
13034996126,0cyclictest22864-21munin-node0
13034996126,0cyclictest22476-1kworker/0:1H09:13:300
13034996126,0cyclictest1088-21taskset08:07:550
13034996124,0cyclictest0-21swapper/010:31:440
13034996120,0cyclictest0-21swapper/010:56:580
81600,0rcu_preempt19-21ksoftirqd/110:37:471
13034996033,0cyclictest4589-21munin-run09:57:290
13034996026,0cyclictest25811-21ssh11:23:200
13034996025,0cyclictest29629-1kworker/0:1H09:49:480
13034996024,0cyclictest0-21swapper/007:37:490
81590,0rcu_preempt3-21ksoftirqd/009:22:550
13034995926,0cyclictest0-21swapper/012:37:290
13034995925,0cyclictest31114-21ssh12:02:220
10050590,0irq/346-484840016767-1kworker/0:3H11:16:290
81580,0rcu_preempt3-21ksoftirqd/007:07:460
81580,0rcu_preempt19-21ksoftirqd/111:22:301
81580,0rcu_preempt11456-21kworker/0:008:42:530
13034995827,0cyclictest16624-21runrttasks11:47:410
13034995827,0cyclictest11576-1kworker/0:2H08:57:480
13034995826,0cyclictest32135-21dropbear10:57:450
13034995824,0cyclictest15757-21ssh10:41:100
13034995823,0cyclictest22593-21aten_rapower_vo09:42:430
13034995821,0cyclictest0-21swapper/011:39:170
81570,0rcu_preempt3-21ksoftirqd/012:22:400
81570,0rcu_preempt19-21ksoftirqd/108:52:441
81570,0rcu_preempt19-21ksoftirqd/108:52:441
13034995728,0cyclictest12083-21munin-node0
13034995727,0cyclictest19715-1kworker/0:0H09:07:400
13034995727,0cyclictest11779-1kworker/0:2H11:29:380
13034995726,0cyclictest17666-21df09:37:400
13034995723,0cyclictest18155-21aten_rapower_cu07:22:420
13034995723,0cyclictest0-21swapper/012:10:280
81560,0rcu_preempt19-21ksoftirqd/109:12:501
13034995638,0cyclictest17059-21ssh10:42:400
13034995624,0cyclictest0-21swapper/010:25:160
13034995624,0cyclictest0-21swapper/010:25:160
13034995624,0cyclictest0-21swapper/008:32:390
81550,0rcu_preempt3-21ksoftirqd/007:18:030
81550,0rcu_preempt3-21ksoftirqd/007:18:030
81550,0rcu_preempt31733-21dropbear12:02:441
81550,0rcu_preempt19-21ksoftirqd/110:32:441
10050550,0irq/346-484840054-21kswapd010:03:220
81540,0rcu_preempt3-21ksoftirqd/007:02:560
81540,0rcu_preempt30659-21ping08:22:310
81540,0rcu_preempt19-21ksoftirqd/111:20:511
13034995425,0cyclictest5234-21cron08:22:290
13034995421,0cyclictest0-21swapper/010:14:240
81530,0rcu_preempt19-21ksoftirqd/112:22:431
81530,0rcu_preempt19-21ksoftirqd/111:12:571
13034995325,0cyclictest11811-21munin-run08:42:290
13034995323,0cyclictest31360-21wget08:02:440
13034995321,0cyclictest0-21swapper/009:02:430
13034995232,0cyclictest15246-21apt-get08:52:390
13034995232,0cyclictest15246-21apt-get08:52:390
13034995228,0cyclictest16323-21ping07:47:400
13034995228,0cyclictest16323-21ping07:27:410
13034995221,0cyclictest0-21swapper/008:12:490
13034995215,0cyclictest0-21swapper/008:27:480
10050520,0irq/346-4848400851-21rngd07:27:401
10050520,0irq/346-4848400316792kworker/1:3H11:33:081
10050520,0irq/346-484840026468-1kworker/1:3H12:31:061
13034995132,0cyclictest13604-21apt-get08:47:400
13034995127,0cyclictest15084-21taskset07:12:450
13034995127,0cyclictest15084-21taskset07:12:450
10050510,0irq/346-484840054-21kswapd012:33:061
10050510,0irq/346-48484004717-21meminfo12:07:511
9950500,0irq/345-484840011524-1kworker/1:2H12:16:361
81500,0rcu_preempt54-21kswapd008:22:291
81500,0rcu_preempt19-21ksoftirqd/110:07:391
13034995030,0cyclictest27944-21apt-get07:52:400
13034995028,0cyclictest16323-21ping07:42:410
13034995024,0cyclictest22869-21cron07:37:290
81490,0rcu_preempt16323-21ping07:17:411
81490,0rcu_preempt16323-21ping07:17:411
81480,0rcu_preempt19-21ksoftirqd/112:17:551
10050480,0irq/346-48484006924-21df_abs11:37:421
10050480,0irq/346-484840054-21kswapd011:10:581
10050480,0irq/346-484840017245-21df10:42:421
9950470,0irq/345-484840020033-21diskmemload10:04:221
81470,0rcu_preempt19-21ksoftirqd/108:07:411
81470,0rcu_preempt19-21ksoftirqd/108:02:481
81470,0rcu_preempt19-21ksoftirqd/107:42:541
81470,0rcu_preempt19-21ksoftirqd/107:02:471
10050470,0irq/346-484840030018-21latency_hist09:17:301
81460,0rcu_preempt6967-21grep08:27:301
81460,0rcu_preempt22260-21df_inode10:47:441
81460,0rcu_preempt20456-21awk10:12:521
81460,0rcu_preempt19-21ksoftirqd/108:22:421
81460,0rcu_preempt19-21ksoftirqd/107:37:531
81460,0rcu_preempt16323-21ping07:47:391
10050460,0irq/346-48484002895-21df09:22:431
81450,0rcu_preempt20033-21diskmemload10:30:081
81450,0rcu_preempt19-21ksoftirqd/107:33:001
81450,0rcu_preempt19-21ksoftirqd/107:22:521
81440,0rcu_preempt19-21ksoftirqd/112:01:161
81440,0rcu_preempt19-21ksoftirqd/111:28:481
81440,0rcu_preempt19-21ksoftirqd/111:04:361
81440,0rcu_preempt19-21ksoftirqd/110:22:401
81440,0rcu_preempt19-21ksoftirqd/110:22:401
81440,0rcu_preempt19-21ksoftirqd/108:12:441
81430,0rcu_preempt7106-1kworker/1:2H10:01:401
81430,0rcu_preempt19-21ksoftirqd/111:54:311
81430,0rcu_preempt19-21ksoftirqd/110:59:531
81430,0rcu_preempt19-21ksoftirqd/109:52:041
81430,0rcu_preempt19-21ksoftirqd/109:27:511
81430,0rcu_preempt19-21ksoftirqd/109:10:121
81430,0rcu_preempt16860-21df_inode11:47:441
10050430,0irq/346-484840027025-21wget10:52:401
81420,0rcu_preempt19-21ksoftirqd/109:07:301
81420,0rcu_preempt19-21ksoftirqd/107:57:401
81420,0rcu_preempt19-21ksoftirqd/107:52:391
81420,0rcu_preempt0-21swapper/108:47:521
81400,0rcu_preempt19-21ksoftirqd/108:42:591
81390,0rcu_preempt19-21ksoftirqd/108:57:421
81390,0rcu_preempt19-21ksoftirqd/108:32:391
81390,0rcu_preempt19-21ksoftirqd/107:07:421
81380,0rcu_preempt19-21ksoftirqd/107:12:481
81380,0rcu_preempt19-21ksoftirqd/107:12:481
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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