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2026-08-19 - 21:43

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 Wed Aug 19, 2026 12:43:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1743221130sleep1121750irq/30-eth0_g0_12:35:331
1211080ksoftirqd/1121650irq/29-eth0_g0_07:06:451
1211050ksoftirqd/1121750irq/30-eth0_g0_11:16:270
326772940sleep0121750irq/30-eth0_g0_11:24:450
95292830sleep0121650irq/29-eth0_g0_09:50:490
21132610sleep1121750irq/30-eth0_g0_11:31:471
37472600sleep0121650irq/29-eth0_g0_11:37:370
192502520sleep1121650irq/29-eth0_g0_10:30:141
98862510sleep0121650irq/29-eth0_g0_12:03:040
121500ksoftirqd/1121750irq/30-eth0_g0_12:23:301
121480ksoftirqd/1121750irq/30-eth0_g0_11:29:541
121480ksoftirqd/1121750irq/30-eth0_g0_10:37:501
121470ksoftirqd/1121750irq/30-eth0_g0_11:14:361
121470ksoftirqd/1121750irq/30-eth0_g0_10:25:411
121470ksoftirqd/1121750irq/30-eth0_g0_09:55:481
121470ksoftirqd/1121750irq/30-eth0_g0_09:55:481
121470ksoftirqd/1121650irq/29-eth0_g0_10:40:150
73562460chrt121750irq/30-eth0_g0_11:51:560
121460ksoftirqd/1121750irq/30-eth0_g0_11:20:541
121460ksoftirqd/1121750irq/30-eth0_g0_09:06:401
121650450irq/29-eth0_g0_636-21df_abs07:01:400
121650450irq/29-eth0_g0_13-21kworker/0:109:26:420
121650450irq/29-eth0_g0_13-21kworker/0:109:26:420
121450ksoftirqd/1121750irq/30-eth0_g0_12:30:561
121450ksoftirqd/1121750irq/30-eth0_g0_10:16:241
121450ksoftirqd/1121750irq/30-eth0_g0_09:42:421
121450ksoftirqd/1121650irq/29-eth0_g0_07:18:011
121650440irq/29-eth0_g0_1964-21runrttasks11:44:350
121440ksoftirqd/1121750irq/30-eth0_g0_12:33:520
121440ksoftirqd/1121650irq/29-eth0_g0_12:07:061
121440ksoftirqd/1121650irq/29-eth0_g0_07:26:431
204872430sleep0121750irq/30-eth0_g0_10:35:220
136972430sleep0121650irq/29-eth0_g0_12:19:460
121430ksoftirqd/1121750irq/30-eth0_g0_08:35:270
121430ksoftirqd/1121650irq/29-eth0_g0_10:00:461
121420ksoftirqd/1121750irq/30-eth0_g0_10:47:191
121420ksoftirqd/1121650irq/29-eth0_g0_12:26:520
121420ksoftirqd/1121650irq/29-eth0_g0_12:21:271
121420ksoftirqd/1121650irq/29-eth0_g0_11:41:441
121750410irq/30-eth0_g0_1219-21kworker/1:210:32:191
121650410irq/29-eth0_g0_1964-21runrttasks09:10:460
121650410irq/29-eth0_g0_18033-21ntp_offset08:11:460
121410ksoftirqd/1121650irq/29-eth0_g0_11:57:501
121750400irq/30-eth0_g0_1219-21kworker/1:211:04:391
121750400irq/30-eth0_g0_121ksoftirqd/109:46:411
121650400irq/29-eth0_g0_1964-21runrttasks09:14:300
121650400irq/29-eth0_g0_0-21swapper/011:02:430
121650400irq/29-eth0_g0_0-21swapper/010:11:450
82682390chrt121650irq/29-eth0_g0_09:45:230
121750390irq/30-eth0_g0_1219-21kworker/1:210:58:291
121750390irq/30-eth0_g0_121ksoftirqd/109:36:491
121650390irq/29-eth0_g0_30989-21diskmemload12:22:010
121650390irq/29-eth0_g0_31ksoftirqd/009:23:170
121650390irq/29-eth0_g0_1964-21runrttasks10:52:500
121650390irq/29-eth0_g0_121ksoftirqd/111:41:281
121650390irq/29-eth0_g0_121ksoftirqd/107:11:471
121650390irq/29-eth0_g0_10269-21/usr/sbin/munin12:06:470
121650390irq/29-eth0_g0_0-21swapper/009:36:460
121390ksoftirqd/1121750irq/30-eth0_g0_11:26:310
121390ksoftirqd/1121650irq/29-eth0_g0_09:27:561
121390ksoftirqd/1121650irq/29-eth0_g0_09:27:561
121390ksoftirqd/1121650irq/29-eth0_g0_08:41:401
121390ksoftirqd/1121650irq/29-eth0_g0_07:55:031
166999387cyclictest0-21swapper/108:01:491
121750380irq/30-eth0_g0_637-21df_abs07:01:401
121750380irq/30-eth0_g0_1219-21kworker/1:212:16:241
121750380irq/30-eth0_g0_1219-21kworker/1:212:16:241
121750380irq/30-eth0_g0_1219-21kworker/1:211:51:491
121750380irq/30-eth0_g0_121ksoftirqd/110:20:091
121750380irq/30-eth0_g0_0-21swapper/111:22:241
121650380irq/29-eth0_g0_309892diskmemload09:17:570
121650380irq/29-eth0_g0_23278-21taskset10:46:390
121650380irq/29-eth0_g0_166899cyclictest11:09:010
121650380irq/29-eth0_g0_166899cyclictest09:33:040
121650380irq/29-eth0_g0_13-21kworker/0:110:59:180
121650380irq/29-eth0_g0_0-21swapper/010:02:090
121650380irq/29-eth0_g0_0-21swapper/007:46:500
121380ksoftirqd/1121750irq/30-eth0_g0_11:31:360
121380ksoftirqd/1121750irq/30-eth0_g0_10:27:140
121380ksoftirqd/1121750irq/30-eth0_g0_07:32:530
121380ksoftirqd/1121750irq/30-eth0_g0_07:08:190
166999371cyclictest5452-21grep09:31:511
166999371cyclictest29928-21df_abs09:01:411
166999371cyclictest290352sleep108:56:451
166999371cyclictest217042sleep108:26:451
166999371cyclictest2109-21lldpd07:24:131
121750370irq/30-eth0_g0_2925-21grep09:21:511
121750370irq/30-eth0_g0_1219-21kworker/1:211:48:181
121750370irq/30-eth0_g0_121ksoftirqd/110:41:381
121650370irq/29-eth0_g0_1964-21runrttasks10:07:260
121650370irq/29-eth0_g0_17882-21uname08:11:431
121650370irq/29-eth0_g0_15776-21/usr/sbin/munin10:16:410
121370ksoftirqd/124619-21latency10:51:441
121370ksoftirqd/1121750irq/30-eth0_g0_11:59:070
121370ksoftirqd/1121750irq/30-eth0_g0_10:42:370
166999361cyclictest227532sleep108:31:421
166999361cyclictest20083-21/usr/sbin/munin08:21:491
166999361cyclictest20083-21/usr/sbin/munin08:21:491
121750360irq/30-eth0_g0_9738-21unixbench_multi07:36:501
121750360irq/30-eth0_g0_9588-21sendmail_mailqu12:01:481
121750360irq/30-eth0_g0_1727-21grep09:16:501
121750360irq/30-eth0_g0_121ksoftirqd/109:13:011
121650360irq/29-eth0_g0_5387-21/usr/sbin/munin11:46:430
121650360irq/29-eth0_g0_25028-21df_abs08:41:400
121650360irq/29-eth0_g0_1964-21runrttasks08:06:570
121650360irq/29-eth0_g0_1964-21runrttasks07:16:540
121650360irq/29-eth0_g0_166899cyclictest10:01:090
121650360irq/29-eth0_g0_13917-21cat07:56:280
121650360irq/29-eth0_g0_13-21kworker/0:109:52:450
121650360irq/29-eth0_g0_13-21kworker/0:109:52:450
121650360irq/29-eth0_g0_10989-21/usr/sbin/munin07:41:500
166999352cyclictest13576-21irqstats10:06:431
166999351cyclictest8091-21ethtool07:31:421
166999351cyclictest26459-21wc08:46:431
166999351cyclictest0-21swapper/108:38:121
121750350irq/30-eth0_g0_1219-21kworker/1:211:09:351
121750350irq/30-eth0_g0_1219-21kworker/1:210:01:301
121750350irq/30-eth0_g0_12166-21unixbench_multi07:46:501
121650350irq/29-eth0_g0_3673-21head07:11:500
121650350irq/29-eth0_g0_29374-21vmstat08:56:500
121650350irq/29-eth0_g0_21851-21mailstats08:26:470
121650350irq/29-eth0_g0_1964-21runrttasks11:19:240
121650350irq/29-eth0_g0_1964-21runrttasks08:00:150
121650350irq/29-eth0_g0_121ksoftirqd/108:16:411
166999341cyclictest27823-21ntpq08:51:461
166999341cyclictest0-21swapper/108:06:301
121650340irq/29-eth0_g0_6100-21grep07:21:490
121650340irq/29-eth0_g0_31ksoftirqd/010:21:500
121650340irq/29-eth0_g0_29865-21/usr/sbin/munin09:01:420
121650340irq/29-eth0_g0_26457-21cat08:46:430
121650340irq/29-eth0_g0_1964-21runrttasks08:54:400
121650340irq/29-eth0_g0_1964-21runrttasks08:17:250
121650340irq/29-eth0_g0_1964-21runrttasks07:29:550
121650330irq/29-eth0_g0_1964-21runrttasks08:02:190
121650330irq/29-eth0_g0_13-21kworker/0:112:12:160
121650330irq/29-eth0_g0_13-21kworker/0:112:12:160
121650330irq/29-eth0_g0_11303-21runrttasks07:44:461
121650320irq/29-eth0_g0_20274-21chrt08:21:420
121650320irq/29-eth0_g0_20274-21chrt08:21:420
121750310irq/30-eth0_g0_0-21swapper/107:56:361
121650310irq/29-eth0_g0_1964-21runrttasks08:36:320
121300ksoftirqd/1121750irq/30-eth0_g0_07:36:460
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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