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2026-06-09 - 15:50

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 792 highest latencies:
System rackaslot5s.osadl.org (updated Tue Jun 09, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811230,0rcu_preempt851-21rngd09:12:571
811220,0rcu_preempt19-21ksoftirqd/111:04:561
811210,0rcu_preempt19-21ksoftirqd/112:28:321
811210,0rcu_preempt14426-21kworker/1:111:30:111
811200,0rcu_preempt54-21kswapd008:39:091
811160,0rcu_preempt19-21ksoftirqd/112:27:071
811120,0rcu_preempt19-21ksoftirqd/109:46:301
811110,0rcu_preempt19-21ksoftirqd/111:49:271
811110,0rcu_preempt19-21ksoftirqd/111:49:271
811090,0rcu_preempt14426-21kworker/1:111:42:331
811090,0rcu_preempt14426-21kworker/1:111:42:331
811080,0rcu_preempt54-21kswapd012:12:401
811080,0rcu_preempt19-21ksoftirqd/112:07:471
811080,0rcu_preempt19-21ksoftirqd/112:07:471
811070,0rcu_preempt19-21ksoftirqd/109:48:031
811070,0rcu_preempt0-21swapper/111:59:251
811060,0rcu_preempt54-21kswapd009:31:451
811060,0rcu_preempt2389-21ssh10:41:431
811050,0rcu_preempt19-21ksoftirqd/110:48:521
811050,0rcu_preempt19-21ksoftirqd/109:09:091
811040,0rcu_preempt13949-21ssh11:26:041
811020,0rcu_preempt19-21ksoftirqd/110:25:081
811020,0rcu_preempt19-21ksoftirqd/110:18:481
811020,0rcu_preempt14426-21kworker/1:109:18:141
811010,0rcu_preempt19-21ksoftirqd/110:07:451
811000,0rcu_preempt19-21ksoftirqd/110:02:481
81980,0rcu_preempt19-21ksoftirqd/111:08:551
81980,0rcu_preempt19-21ksoftirqd/110:47:181
81970,0rcu_preempt19-21ksoftirqd/111:33:021
81960,0rcu_preempt19-21ksoftirqd/111:55:221
81940,0rcu_preempt19-21ksoftirqd/109:53:591
81920,0rcu_preempt19-21ksoftirqd/110:31:291
81920,0rcu_preempt19-21ksoftirqd/110:17:051
81890,0rcu_preempt19-21ksoftirqd/112:06:301
81890,0rcu_preempt19-21ksoftirqd/111:47:001
81890,0rcu_preempt19-21ksoftirqd/108:47:561
81890,0rcu_preempt19-21ksoftirqd/108:23:021
81880,0rcu_preempt19-21ksoftirqd/110:59:211
81880,0rcu_preempt19-21ksoftirqd/110:59:211
81880,0rcu_preempt19-21ksoftirqd/110:34:471
81880,0rcu_preempt19-21ksoftirqd/107:33:121
81870,0rcu_preempt54-21kswapd011:20:481
81870,0rcu_preempt19-21ksoftirqd/109:40:311
81870,0rcu_preempt19-21ksoftirqd/108:18:071
81870,0rcu_preempt17190-21ping08:03:051
81870,0rcu_preempt17190-21ping08:03:051
81860,0rcu_preempt19-21ksoftirqd/112:37:031
81860,0rcu_preempt19-21ksoftirqd/112:18:301
81860,0rcu_preempt19-21ksoftirqd/109:26:231
81860,0rcu_preempt19-21ksoftirqd/108:01:551
81850,0rcu_preempt6509-21diskmemload10:01:211
81840,0rcu_preempt19-21ksoftirqd/107:42:481
81830,0rcu_preempt32462-21grep09:33:041
81830,0rcu_preempt19-21ksoftirqd/107:26:151
81830,0rcu_preempt19-21ksoftirqd/107:21:211
81820,0rcu_preempt19-21ksoftirqd/111:17:171
81820,0rcu_preempt19-21ksoftirqd/108:28:341
81800,0rcu_preempt19-21ksoftirqd/108:14:241
81800,0rcu_preempt19-21ksoftirqd/108:09:531
81790,0rcu_preempt19-21ksoftirqd/107:41:571
81770,0rcu_preempt54-21kswapd009:27:410
81770,0rcu_preempt19-21ksoftirqd/110:53:021
81770,0rcu_preempt19-21ksoftirqd/107:31:361
10050770,0irq/346-484840023557-1kworker/0:0H10:30:530
81750,0rcu_preempt19-21ksoftirqd/109:03:031
81730,0rcu_preempt19-21ksoftirqd/108:56:201
81730,0rcu_preempt19-21ksoftirqd/107:14:591
10050730,0irq/346-484840054-21kswapd011:53:030
81720,0rcu_preempt19-21ksoftirqd/107:08:161
10050720,0irq/346-48484007456-1kworker/0:1H11:20:500
10050710,0irq/346-484840024531-1kworker/0:2H12:10:160
10050710,0irq/346-484840024531-1kworker/0:2H12:10:160
81700,0rcu_preempt3-21ksoftirqd/010:08:040
81700,0rcu_preempt19-21ksoftirqd/107:52:531
10050700,0irq/346-48484001969-1kworker/0:1H12:20:300
81690,0rcu_preempt3-21ksoftirqd/012:02:310
81690,0rcu_preempt19-21ksoftirqd/108:42:571
81690,0rcu_preempt19-21ksoftirqd/108:37:011
10050690,0irq/346-484840029420-1kworker/0:3H12:27:590
81670,0rcu_preempt19-21ksoftirqd/108:58:001
81670,0rcu_preempt19-21ksoftirqd/107:48:071
81650,0rcu_preempt3-21ksoftirqd/010:34:510
81600,0rcu_preempt54-21kswapd010:50:550
81550,0rcu_preempt3-21ksoftirqd/007:23:090
10050550,0irq/346-484840018825-21ssh10:57:580
10050550,0irq/346-484840018825-21ssh10:57:580
10050530,0irq/346-484840054-21kswapd010:17:550
10050530,0irq/346-484840017363-1kworker/0:1H11:32:370
10050530,0irq/346-484840012078-21ssh09:45:320
10050520,0irq/346-484840031462-21ssh09:32:440
10050510,0irq/346-484840054-21kswapd009:51:040
10050510,0irq/346-484840029189-21ssh11:41:350
10050510,0irq/346-484840029189-21ssh11:41:350
10050500,0irq/346-484840054-21kswapd011:42:400
10050500,0irq/346-484840054-21kswapd009:17:560
10050500,0irq/346-484840054-21kswapd008:42:360
10050500,0irq/346-484840030921-21munin-node0
10050490,0irq/346-484840023377-21fschecks_count11:02:540
10050480,0irq/346-484840054-21kswapd009:58:000
10050470,0irq/346-48484000-21swapper/009:37:580
81460,0rcu_preempt3-21ksoftirqd/012:23:060
81460,0rcu_preempt3-21ksoftirqd/011:33:020
31934994613,0cyclictest22661-21apt-get08:17:470
10050460,0irq/346-48484001596-1kworker/0:2H09:52:500
10050460,0irq/346-48484000-21swapper/010:05:330
10050450,0irq/346-484840027118-1kworker/0:0H08:29:340
10050450,0irq/346-48484000-21swapper/012:07:370
10050450,0irq/346-48484000-21swapper/010:57:030
9950440,0irq/345-48484006792-21apt-get09:07:480
3193499446,0cyclictest32225-1kworker/0:3H11:48:010
3193499446,0cyclictest32225-1kworker/0:3H11:48:010
10050440,0irq/346-484840054-21kswapd011:10:040
10050440,0irq/346-484840031202-21idleruntime10:37:570
10050440,0irq/346-484840010129-21ssh10:16:440
9950430,0irq/345-48484000-21swapper/009:15:300
81430,0rcu_preempt19-21ksoftirqd/107:02:591
10050430,0irq/346-484840016518-21ssh10:22:560
10050430,0irq/346-484840011820-1kworker/0:2H12:33:000
10050430,0irq/346-48484001103-21dropbear07:12:170
31934994216,0cyclictest0-21swapper/008:01:130
1599420,0migration/032562-21aten_rapower_en08:47:490
1599420,0migration/011208-21munin-node0
10050420,0irq/346-48484000-21swapper/012:16:490
10050420,0irq/346-48484000-21swapper/011:13:000
9950410,0irq/345-48484001011-1kworker/0:0H10:42:520
10050410,0irq/346-484840021650-21apt-get09:22:490
9950400,0irq/345-48484004586-1kworker/0:0H09:02:530
9950400,0irq/345-484840031088-21fschecks_count08:42:540
31934994013,0cyclictest0-21swapper/008:06:370
31934994013,0cyclictest0-21swapper/008:06:370
10050400,0irq/346-484840024301-21munin-node0
31934993812,0cyclictest0-21swapper/007:18:030
9950370,0irq/345-48484003-21ksoftirqd/007:48:050
81370,0rcu_preempt3-21ksoftirqd/008:17:370
81370,0rcu_preempt2811-21ping07:32:480
31934993713,0cyclictest0-21swapper/007:45:280
3193499371,0cyclictest9527-21apt-get07:37:490
3193499371,0cyclictest2810-21munin-run07:17:370
3193499362,0cyclictest54-21kswapd008:07:550
31934993610,0cyclictest0-21swapper/007:30:370
9950350,0irq/345-48484000-21swapper/007:52:570
9950340,0irq/345-48484000-21swapper/008:52:470
9950330,0irq/345-48484000-21swapper/008:57:370
9950330,0irq/345-48484000-21swapper/008:32:540
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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