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2026-08-01 - 10:15

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #3, 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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  Eltec
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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 376 highest latencies:
System rack3slot5s.osadl.org (updated Sat Aug 01, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
70021600sleep1121650irq/29-eth0_g0_23:06:021
121940ksoftirqd/1121750irq/30-eth0_g0_19:22:261
171552860sleep0121750irq/30-eth0_g0_22:00:280
121750ksoftirqd/1121750irq/30-eth0_g0_23:08:400
121740ksoftirqd/1121750irq/30-eth0_g0_22:58:060
121710ksoftirqd/1121750irq/30-eth0_g0_23:47:360
177862680sleep0121650irq/29-eth0_g0_22:02:300
147372670sleep1121650irq/29-eth0_g0_00:05:551
31612650sleep0121750irq/30-eth0_g0_23:15:430
111082560sleep1121750irq/30-eth0_g0_21:36:281
121550ksoftirqd/1121750irq/30-eth0_g0_23:55:331
58492540sleep1121750irq/30-eth0_g0_21:12:361
121530ksoftirqd/1121750irq/30-eth0_g0_21:07:331
44612510sleep0121750irq/30-eth0_g0_23:21:320
121510ksoftirqd/1121650irq/29-eth0_g0_20:21:021
275512500sleep0121650irq/29-eth0_g0_22:42:260
121480ksoftirqd/1121750irq/30-eth0_g0_22:17:341
135852470sleep1121750irq/30-eth0_g0_23:57:291
121470ksoftirqd/1121750irq/30-eth0_g0_23:20:581
121470ksoftirqd/1121650irq/29-eth0_g0_22:50:540
121460ksoftirqd/1121650irq/29-eth0_g0_19:08:201
233072450sleep1121750irq/30-eth0_g0_22:25:421
219702450sleep0121650irq/29-eth0_g0_22:19:240
216122450sleep1121750irq/30-eth0_g0_00:32:321
121650450irq/29-eth0_g0_121ksoftirqd/122:14:310
121450ksoftirqd/1121650irq/29-eth0_g0_21:01:291
121450ksoftirqd/1121650irq/29-eth0_g0_20:36:471
292152440sleep1121650irq/29-eth0_g0_22:48:021
121750440irq/30-eth0_g0_1219-21kworker/1:221:25:351
121440ksoftirqd/1121750irq/30-eth0_g0_21:46:190
121440ksoftirqd/1121750irq/30-eth0_g0_21:46:190
121440ksoftirqd/1121650irq/29-eth0_g0_19:46:281
121750430irq/30-eth0_g0_193842sleep100:22:561
121750430irq/30-eth0_g0_1219-21kworker/1:222:00:531
121650430irq/29-eth0_g0_31ksoftirqd/022:30:380
121430ksoftirqd/1121750irq/30-eth0_g0_22:39:590
121430ksoftirqd/1121650irq/29-eth0_g0_23:12:381
121430ksoftirqd/1121650irq/29-eth0_g0_21:24:200
121430ksoftirqd/1121650irq/29-eth0_g0_19:38:021
121650420irq/29-eth0_g0_6257-21unixbench_multi19:02:370
121650420irq/29-eth0_g0_31ksoftirqd/023:02:330
121650420irq/29-eth0_g0_31ksoftirqd/022:33:300
121650420irq/29-eth0_g0_31ksoftirqd/022:33:300
121650420irq/29-eth0_g0_1964-21runrttasks00:37:040
121420ksoftirqd/1121650irq/29-eth0_g0_22:34:441
121420ksoftirqd/1121650irq/29-eth0_g0_22:34:441
121420ksoftirqd/1121650irq/29-eth0_g0_20:41:571
208012410sleep0121650irq/29-eth0_g0_20:02:330
121750410irq/30-eth0_g0_31ksoftirqd/021:36:530
121650410irq/29-eth0_g0_5964-21df_abs23:27:250
121650410irq/29-eth0_g0_23449-21unixbench_multi20:12:340
121650410irq/29-eth0_g0_13-21kworker/0:121:38:320
121650410irq/29-eth0_g0_121ksoftirqd/123:55:130
121410ksoftirqd/1121650irq/29-eth0_g0_23:22:411
121410ksoftirqd/1121650irq/29-eth0_g0_22:15:401
121410ksoftirqd/1121650irq/29-eth0_g0_21:02:321
121410ksoftirqd/1121650irq/29-eth0_g0_20:23:331
677499401cyclictest151482sleep100:07:221
121750400irq/30-eth0_g0_1219-21kworker/1:223:44:121
121750400irq/30-eth0_g0_1219-21kworker/1:223:28:011
121750400irq/30-eth0_g0_1219-21kworker/1:222:53:461
121750400irq/30-eth0_g0_1219-21kworker/1:222:38:211
121750400irq/30-eth0_g0_1219-21kworker/1:221:29:301
121750400irq/30-eth0_g0_1219-21kworker/1:200:21:051
121650400irq/29-eth0_g0_9451-21latency_hist23:42:120
121650400irq/29-eth0_g0_31ksoftirqd/023:43:420
121650400irq/29-eth0_g0_31ksoftirqd/000:17:080
121650400irq/29-eth0_g0_31ksoftirqd/000:17:080
121650400irq/29-eth0_g0_1964-21runrttasks23:22:220
121650400irq/29-eth0_g0_1964-21runrttasks19:36:030
121650400irq/29-eth0_g0_1964-21runrttasks19:36:030
121650400irq/29-eth0_g0_13-21kworker/0:123:34:490
121650400irq/29-eth0_g0_13-21kworker/0:122:52:430
121650400irq/29-eth0_g0_13-21kworker/0:122:25:500
121650400irq/29-eth0_g0_13-21kworker/0:100:08:200
121650400irq/29-eth0_g0_13-21kworker/0:100:01:560
121400ksoftirqd/1121650irq/29-eth0_g0_00:12:271
121400ksoftirqd/1121650irq/29-eth0_g0_00:12:271
121750390irq/30-eth0_g0_1219-21kworker/1:223:49:051
121750390irq/30-eth0_g0_1219-21kworker/1:222:10:121
121750390irq/30-eth0_g0_121ksoftirqd/123:42:071
121750390irq/30-eth0_g0_121ksoftirqd/123:34:471
121750390irq/30-eth0_g0_121ksoftirqd/122:04:351
121750390irq/30-eth0_g0_121ksoftirqd/121:46:171
121750390irq/30-eth0_g0_121ksoftirqd/121:46:171
121750390irq/30-eth0_g0_0-21swapper/122:45:151
121650390irq/29-eth0_g0_29393-21taskset20:37:310
121650390irq/29-eth0_g0_13-21kworker/0:121:54:160
121650390irq/29-eth0_g0_13-21kworker/0:121:19:070
121650390irq/29-eth0_g0_13-21kworker/0:121:08:420
121650390irq/29-eth0_g0_13-21kworker/0:100:17:340
121390ksoftirqd/1121650irq/29-eth0_g0_19:50:351
121390ksoftirqd/1121650irq/29-eth0_g0_19:32:141
121390ksoftirqd/1121650irq/29-eth0_g0_19:32:141
677499381cyclictest30759-21timerandwakeup20:42:351
677499381cyclictest12454-21grep19:27:331
677499381cyclictest12454-21grep19:27:331
121750380irq/30-eth0_g0_1219-21kworker/1:223:09:401
121750380irq/30-eth0_g0_121ksoftirqd/122:59:341
121750380irq/30-eth0_g0_121ksoftirqd/122:31:451
121750380irq/30-eth0_g0_121ksoftirqd/121:18:101
121650380irq/29-eth0_g0_24039-21/usr/sbin/munin20:17:310
121650380irq/29-eth0_g0_21048-21latency_hist00:32:130
121650380irq/29-eth0_g0_13-21kworker/0:121:13:560
121380ksoftirqd/1121650irq/29-eth0_g0_20:54:161
121380ksoftirqd/1121650irq/29-eth0_g0_20:54:161
677499371cyclictest26633-21df20:27:251
677499371cyclictest144552sleep121:47:371
121750370irq/30-eth0_g0_0-21swapper/120:01:311
121650370irq/29-eth0_g0_3808-21sh21:07:120
121650370irq/29-eth0_g0_31842-21awk20:47:310
121650370irq/29-eth0_g0_31ksoftirqd/021:47:310
121650370irq/29-eth0_g0_31ksoftirqd/020:27:130
121650370irq/29-eth0_g0_27705-21latency_hist20:32:140
121650370irq/29-eth0_g0_19258-21grep22:07:340
121650370irq/29-eth0_g0_13-21kworker/0:100:02:150
121650370irq/29-eth0_g0_121ksoftirqd/121:37:441
121650370irq/29-eth0_g0_11717-21latency_hist19:27:140
121370ksoftirqd/120999-21unixbench_multi20:02:361
121370ksoftirqd/1121750irq/30-eth0_g0_21:28:250
121370ksoftirqd/1121750irq/30-eth0_g0_20:37:090
677499362cyclictest218322sleep120:07:331
677499361cyclictest3810-21diskmemload00:27:321
677499361cyclictest23366-21awk20:12:321
121750360irq/30-eth0_g0_5880-21latency19:02:301
121750360irq/30-eth0_g0_1219-21kworker/1:221:52:191
121650360irq/29-eth0_g0_31371-21latency_hist20:47:140
121650360irq/29-eth0_g0_18990-21netstat00:22:300
121650360irq/29-eth0_g0_14874-21unixbench_multi19:37:340
121360ksoftirqd/118176-21ls19:52:271
6774993520cyclictest31800-21/usr/sbin/munin20:47:301
677499351cyclictest9500-21forks19:17:271
121650350irq/29-eth0_g0_9500-21forks19:17:270
121650350irq/29-eth0_g0_7096-21/usr/sbin/munin19:07:260
121650350irq/29-eth0_g0_1964-21runrttasks21:01:560
121650350irq/29-eth0_g0_1964-21runrttasks20:00:580
121650350irq/29-eth0_g0_17290-21timerandwakeup19:47:390
677499341cyclictest9232-21munin-run19:17:131
121650340irq/29-eth0_g0_1964-21runrttasks20:11:200
121650340irq/29-eth0_g0_1964-21runrttasks19:43:170
121650340irq/29-eth0_g0_1964-21runrttasks19:14:230
121650340irq/29-eth0_g0_18593-21unixbench_singl19:52:340
121650340irq/29-eth0_g0_12041-21latency19:27:260
121650340irq/29-eth0_g0_12041-21latency19:27:260
121650340irq/29-eth0_g0_0-21swapper/020:52:270
121650340irq/29-eth0_g0_0-21swapper/020:52:270
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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