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2026-09-13 - 06:00

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 highest latencies:
System rack3slot5s.osadl.org (updated Sun Sep 13, 2026 00:43:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
82221070sleep1121650irq/29-eth0_g0_23:49:051
121920ksoftirqd/1121750irq/30-eth0_g0_19:00:421
46312820sleep1121750irq/30-eth0_g0_00:05:171
252992770sleep1121750irq/30-eth0_g0_23:15:471
118512760sleep1121750irq/30-eth0_g0_22:20:481
12712610sleep0121750irq/30-eth0_g0_23:50:460
237812550sleep1121750irq/30-eth0_g0_20:55:551
121550ksoftirqd/1121750irq/30-eth0_g0_20:05:521
126312540sleep0121750irq/30-eth0_g0_22:25:310
136782530sleep1121750irq/30-eth0_g0_20:15:501
121520ksoftirqd/1121750irq/30-eth0_g0_23:38:491
121520ksoftirqd/1121750irq/30-eth0_g0_00:09:011
121510ksoftirqd/1121650irq/29-eth0_g0_23:35:480
24172500sleep0121650irq/29-eth0_g0_21:41:080
121750460irq/30-eth0_g0_1219-21kworker/1:222:12:081
121460ksoftirqd/1121650irq/29-eth0_g0_23:25:141
121460ksoftirqd/1121650irq/29-eth0_g0_23:25:141
121460ksoftirqd/1121650irq/29-eth0_g0_20:01:341
121450ksoftirqd/1121750irq/30-eth0_g0_21:50:451
121450ksoftirqd/1121650irq/29-eth0_g0_20:25:561
121750440irq/30-eth0_g0_19179-21awk22:50:521
121650440irq/29-eth0_g0_53302sleep021:55:380
121440ksoftirqd/1121650irq/29-eth0_g0_22:18:551
121650430irq/29-eth0_g0_31ksoftirqd/022:34:400
121650430irq/29-eth0_g0_14750-21sort20:20:470
121430ksoftirqd/1121650irq/29-eth0_g0_19:23:061
121430ksoftirqd/1121650irq/29-eth0_g0_00:15:461
121430ksoftirqd/1121650irq/29-eth0_g0_00:15:461
121750420irq/30-eth0_g0_1219-21kworker/1:222:38:281
121750420irq/30-eth0_g0_121ksoftirqd/121:40:481
121650420irq/29-eth0_g0_31ksoftirqd/000:31:170
121650420irq/29-eth0_g0_31ksoftirqd/000:28:030
121650420irq/29-eth0_g0_13-21kworker/0:123:28:370
121650420irq/29-eth0_g0_13-21kworker/0:121:11:340
121650420irq/29-eth0_g0_121ksoftirqd/122:44:180
121420ksoftirqd/1121650irq/29-eth0_g0_23:15:061
121420ksoftirqd/1121650irq/29-eth0_g0_22:28:501
286922410sleep1121650irq/29-eth0_g0_21:15:581
121750410irq/30-eth0_g0_1219-21kworker/1:200:32:221
121750410irq/30-eth0_g0_121ksoftirqd/121:35:541
121650410irq/29-eth0_g0_9090-21seq00:20:520
121650410irq/29-eth0_g0_8321-21find22:05:510
121650410irq/29-eth0_g0_28909-21/usr/sbin/munin23:30:460
121650410irq/29-eth0_g0_25396-21diskmemload23:23:370
121650410irq/29-eth0_g0_25396-21diskmemload23:23:370
121650410irq/29-eth0_g0_1964-21runrttasks19:04:380
121410ksoftirqd/1121750irq/30-eth0_g0_22:43:361
121410ksoftirqd/1121650irq/29-eth0_g0_23:43:271
314002400chrt121650irq/29-eth0_g0_21:28:570
2846799401cyclictest21303-21sed23:00:421
121750400irq/30-eth0_g0_0-21swapper/122:47:571
121650400irq/29-eth0_g0_29241-21df21:20:410
121650400irq/29-eth0_g0_18561-21ntp_states20:35:460
121650400irq/29-eth0_g0_13-21kworker/0:122:26:450
121650400irq/29-eth0_g0_13-21kworker/0:122:10:410
121650400irq/29-eth0_g0_13-21kworker/0:121:34:320
121650400irq/29-eth0_g0_13-21kworker/0:121:34:320
121650400irq/29-eth0_g0_13-21kworker/0:100:19:040
121650400irq/29-eth0_g0_13-21kworker/0:100:19:040
121650400irq/29-eth0_g0_121ksoftirqd/121:25:471
121750390irq/30-eth0_g0_1219-21kworker/1:222:04:241
121750390irq/30-eth0_g0_121ksoftirqd/122:56:261
121750390irq/30-eth0_g0_0-21swapper/123:34:541
121750390irq/30-eth0_g0_0-21swapper/100:24:081
121650390irq/29-eth0_g0_420-21unixbench_multi19:20:540
121650390irq/29-eth0_g0_27946-21/usr/sbin/munin21:15:460
121650390irq/29-eth0_g0_1964-21runrttasks19:44:190
121650390irq/29-eth0_g0_13-21kworker/0:123:40:370
121650390irq/29-eth0_g0_13-21kworker/0:100:06:190
121650390irq/29-eth0_g0_10689-21proc_pri22:15:480
121390ksoftirqd/1121750irq/30-eth0_g0_23:15:420
121390ksoftirqd/1121750irq/30-eth0_g0_23:06:390
121390ksoftirqd/1121750irq/30-eth0_g0_22:53:340
121390ksoftirqd/1121750irq/30-eth0_g0_22:03:070
121390ksoftirqd/1121750irq/30-eth0_g0_21:52:280
121390ksoftirqd/1121750irq/30-eth0_g0_21:06:450
121390ksoftirqd/1121750irq/30-eth0_g0_21:02:180
121390ksoftirqd/1121750irq/30-eth0_g0_20:57:080
121390ksoftirqd/1121750irq/30-eth0_g0_20:41:100
121390ksoftirqd/1121750irq/30-eth0_g0_19:55:230
121390ksoftirqd/1121750irq/30-eth0_g0_00:13:220
121390ksoftirqd/1121750irq/30-eth0_g0_00:04:380
121390ksoftirqd/1121650irq/29-eth0_g0_23:07:561
121390ksoftirqd/1121650irq/29-eth0_g0_20:55:071
121390ksoftirqd/1121650irq/29-eth0_g0_20:47:441
121390ksoftirqd/1121650irq/29-eth0_g0_20:45:031
121390ksoftirqd/1121650irq/29-eth0_g0_20:22:481
121390ksoftirqd/1121650irq/29-eth0_g0_19:18:291
121750380irq/30-eth0_g0_1219-21kworker/1:223:29:521
121750380irq/30-eth0_g0_1219-21kworker/1:221:47:421
121750380irq/30-eth0_g0_121ksoftirqd/123:58:051
121750380irq/30-eth0_g0_0-21swapper/121:31:311
121750380irq/30-eth0_g0_0-21swapper/121:31:311
121650380irq/29-eth0_g0_13391-21df_abs20:15:440
121650380irq/29-eth0_g0_13-21kworker/0:123:46:520
121650380irq/29-eth0_g0_13-21kworker/0:122:36:500
121380ksoftirqd/1121750irq/30-eth0_g0_23:15:160
121380ksoftirqd/1121750irq/30-eth0_g0_21:38:320
121380ksoftirqd/1121750irq/30-eth0_g0_19:19:280
121380ksoftirqd/1121650irq/29-eth0_g0_21:59:301
121380ksoftirqd/1121650irq/29-eth0_g0_21:20:501
121380ksoftirqd/1121650irq/29-eth0_g0_21:14:031
121380ksoftirqd/1121650irq/29-eth0_g0_20:10:511
121380ksoftirqd/1121650irq/29-eth0_g0_19:53:161
121380ksoftirqd/1121650irq/29-eth0_g0_19:40:491
121380ksoftirqd/1121650irq/29-eth0_g0_19:10:551
121380ksoftirqd/1121650irq/29-eth0_g0_00:29:411
2846799371cyclictest14360-21proc_pri22:30:511
121750370irq/30-eth0_g0_1322-21cat19:25:480
121750370irq/30-eth0_g0_1219-21kworker/1:221:10:231
121650370irq/29-eth0_g0_31ksoftirqd/023:56:040
121650370irq/29-eth0_g0_21360-21df_abs23:00:420
121650370irq/29-eth0_g0_13-21kworker/0:122:45:340
121650370irq/29-eth0_g0_12271-21/usr/sbin/munin20:10:450
121650370irq/29-eth0_g0_10280-21grep20:00:530
121370ksoftirqd/18044-21latency22:05:451
121750360irq/30-eth0_g0_1219-21kworker/1:223:51:111
121650360irq/29-eth0_g0_31ksoftirqd/022:56:070
121650360irq/29-eth0_g0_1964-21runrttasks19:12:260
121650360irq/29-eth0_g0_17268-21missed_timers20:30:470
121650360irq/29-eth0_g0_15955-21irqstats20:25:450
121650360irq/29-eth0_g0_13-21kworker/0:121:49:560
121360ksoftirqd/1121750irq/30-eth0_g0_20:08:270
121360ksoftirqd/1121650irq/29-eth0_g0_20:35:391
2846799351cyclictest3785-21cat19:35:471
2846799351cyclictest3785-21cat19:35:471
121750350irq/30-eth0_g0_0-21swapper/121:00:521
121650350irq/29-eth0_g0_8901-21processes19:55:490
121650350irq/29-eth0_g0_21145-21sendmail_mailqu20:45:510
2846799341cyclictest60852sleep119:45:441
2846799341cyclictest25396-21diskmemload00:10:441
2846799341cyclictest17584-21chrt20:30:531
121650340irq/29-eth0_g0_6580-21unixbench_multi19:45:530
121650340irq/29-eth0_g0_3736-21sort19:35:460
121650340irq/29-eth0_g0_3736-21sort19:35:460
121650340irq/29-eth0_g0_22064-21iostat20:50:450
121650340irq/29-eth0_g0_1964-21runrttasks19:07:000
2846799332cyclictest26832sleep119:30:481
2846799331cyclictest0-21swapper/119:29:371
121650330irq/29-eth0_g0_2561-21missed_timers19:30:440
121750310irq/30-eth0_g0_2846799cyclictest19:05:541
121750310irq/30-eth0_g0_0-21swapper/119:55:431
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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