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2026-09-14 - 22:08

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 Mon Sep 14, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
67421280sleep1121650irq/29-eth0_g0_10:34:461
67421280sleep1121650irq/29-eth0_g0_10:34:461
315812970sleep0121650irq/29-eth0_g0_10:26:000
293252610sleep1121750irq/30-eth0_g0_10:18:181
118812610sleep0121750irq/30-eth0_g0_09:05:490
121600ksoftirqd/1121750irq/30-eth0_g0_12:16:281
79132590sleep0121750irq/30-eth0_g0_08:50:420
121540ksoftirqd/1121750irq/30-eth0_g0_09:21:511
121530ksoftirqd/1121750irq/30-eth0_g0_10:49:411
121520ksoftirqd/1121750irq/30-eth0_g0_10:51:441
121520ksoftirqd/1121650irq/29-eth0_g0_09:14:321
121510ksoftirqd/1121750irq/30-eth0_g0_09:51:301
121470ksoftirqd/1121750irq/30-eth0_g0_12:24:411
121470ksoftirqd/1121750irq/30-eth0_g0_12:24:411
114402470sleep0121750irq/30-eth0_g0_11:16:060
121750460irq/30-eth0_g0_11110-21diskmemload10:06:431
121460ksoftirqd/1121650irq/29-eth0_g0_08:34:311
121750450irq/30-eth0_g0_1219-21kworker/1:210:58:261
121450ksoftirqd/1121750irq/30-eth0_g0_11:49:021
121650440irq/29-eth0_g0_1764-21grep08:25:440
121440ksoftirqd/1121750irq/30-eth0_g0_11:42:391
121440ksoftirqd/1121650irq/29-eth0_g0_12:05:441
121650430irq/29-eth0_g0_15552-21latency_hist11:35:280
121650430irq/29-eth0_g0_13-21kworker/0:112:27:100
121430ksoftirqd/1121750irq/30-eth0_g0_10:00:371
121430ksoftirqd/1121650irq/29-eth0_g0_12:33:190
121430ksoftirqd/1121650irq/29-eth0_g0_09:35:160
121430ksoftirqd/1121650irq/29-eth0_g0_09:30:281
121430ksoftirqd/1121650irq/29-eth0_g0_08:36:081
121750420irq/30-eth0_g0_1219-21kworker/1:211:09:531
121750420irq/30-eth0_g0_121ksoftirqd/111:32:591
121650420irq/29-eth0_g0_31ksoftirqd/010:30:440
121650420irq/29-eth0_g0_31ksoftirqd/010:30:440
121650420irq/29-eth0_g0_31ksoftirqd/010:03:350
121650420irq/29-eth0_g0_13-21kworker/0:109:20:240
121750410irq/30-eth0_g0_121ksoftirqd/109:42:361
121650410irq/29-eth0_g0_31ksoftirqd/012:00:470
121650410irq/29-eth0_g0_31ksoftirqd/011:10:390
121650410irq/29-eth0_g0_31ksoftirqd/010:45:130
121650410irq/29-eth0_g0_1964-21runrttasks11:37:220
121650410irq/29-eth0_g0_13563-21sed07:00:470
121650410irq/29-eth0_g0_13-21kworker/0:111:42:040
121650410irq/29-eth0_g0_13-21kworker/0:109:52:230
121650410irq/29-eth0_g0_0-21swapper/008:00:490
121410ksoftirqd/1121750irq/30-eth0_g0_09:20:380
121410ksoftirqd/1121650irq/29-eth0_g0_11:25:481
121410ksoftirqd/1121650irq/29-eth0_g0_09:48:451
1407599405cyclictest1477-21unixbench_multi10:35:481
121750400irq/30-eth0_g0_1219-21kworker/1:211:22:251
121750400irq/30-eth0_g0_1219-21kworker/1:211:18:151
121750400irq/30-eth0_g0_1219-21kworker/1:211:13:111
121750400irq/30-eth0_g0_1219-21kworker/1:210:26:101
121650400irq/29-eth0_g0_31ksoftirqd/012:20:320
121650400irq/29-eth0_g0_31ksoftirqd/012:20:320
121650400irq/29-eth0_g0_13-21kworker/0:112:20:270
121650400irq/29-eth0_g0_13-21kworker/0:111:51:400
121650400irq/29-eth0_g0_13-21kworker/0:111:24:570
121650400irq/29-eth0_g0_13-21kworker/0:111:10:120
121650400irq/29-eth0_g0_13-21kworker/0:110:51:170
121650400irq/29-eth0_g0_13-21kworker/0:110:37:240
121650400irq/29-eth0_g0_13-21kworker/0:110:18:560
121650400irq/29-eth0_g0_13-21kworker/0:110:06:540
121650400irq/29-eth0_g0_13-21kworker/0:109:55:570
121650400irq/29-eth0_g0_13-21kworker/0:109:49:400
121650400irq/29-eth0_g0_13-21kworker/0:109:41:330
121650400irq/29-eth0_g0_13-21kworker/0:109:28:400
121400ksoftirqd/1121650irq/29-eth0_g0_12:25:371
1407599391cyclictest196152sleep107:25:471
121750390irq/30-eth0_g0_1219-21kworker/1:211:52:341
121750390irq/30-eth0_g0_1219-21kworker/1:209:17:401
121750390irq/30-eth0_g0_121ksoftirqd/109:05:381
121650390irq/29-eth0_g0_13052-21grep09:10:470
121650390irq/29-eth0_g0_13-21kworker/0:112:11:290
121650390irq/29-eth0_g0_13-21kworker/0:111:47:270
121650390irq/29-eth0_g0_13-21kworker/0:111:02:010
121650390irq/29-eth0_g0_13-21kworker/0:110:20:460
121650390irq/29-eth0_g0_13-21kworker/0:110:12:430
121650390irq/29-eth0_g0_13-21kworker/0:109:39:470
121650390irq/29-eth0_g0_13-21kworker/0:109:39:470
121390ksoftirqd/1121650irq/29-eth0_g0_09:37:301
121390ksoftirqd/1121650irq/29-eth0_g0_09:37:301
121390ksoftirqd/1121650irq/29-eth0_g0_07:33:461
1407599382cyclictest16683-21sshd11:40:041
1407599381cyclictest9916-21grep09:00:271
1407599381cyclictest303592sleep110:21:041
1407599381cyclictest18369-21runrttasks07:20:471
1407599381cyclictest14234-21df07:05:391
1407599381cyclictest11110-21diskmemload10:13:541
121750380irq/30-eth0_g0_1219-21kworker/1:211:59:161
121750380irq/30-eth0_g0_1219-21kworker/1:209:32:231
121750380irq/30-eth0_g0_121ksoftirqd/109:55:471
121750380irq/30-eth0_g0_0-21swapper/112:31:291
121750380irq/30-eth0_g0_0-21swapper/111:05:271
121650380irq/29-eth0_g0_30754-21unixbench_multi08:10:490
121650380irq/29-eth0_g0_27089-21unixbench_multi07:55:480
121650380irq/29-eth0_g0_13-21kworker/0:111:57:320
121650380irq/29-eth0_g0_13-21kworker/0:110:46:040
121650380irq/29-eth0_g0_121ksoftirqd/110:44:411
121380ksoftirqd/1121650irq/29-eth0_g0_08:41:261
121380ksoftirqd/1121650irq/29-eth0_g0_08:02:441
121380ksoftirqd/1121650irq/29-eth0_g0_07:44:551
121380ksoftirqd/1121650irq/29-eth0_g0_07:38:331
1407599371cyclictest663-21taskset08:20:471
1407599371cyclictest15462-21sed07:10:391
121750370irq/30-eth0_g0_1219-21kworker/1:212:12:041
121750370irq/30-eth0_g0_121ksoftirqd/112:01:171
121650370irq/29-eth0_g0_31ksoftirqd/012:06:310
121650370irq/29-eth0_g0_13672-21runrttasks07:00:561
121650370irq/29-eth0_g0_13132-21/usr/sbin/munin11:25:490
121650370irq/29-eth0_g0_13-21kworker/0:110:59:530
121370ksoftirqd/1121650irq/29-eth0_g0_09:01:431
121370ksoftirqd/1121650irq/29-eth0_g0_08:53:141
121370ksoftirqd/1121650irq/29-eth0_g0_08:10:221
1407599362cyclictest169142sleep107:15:431
1407599361cyclictest6968-21grep08:45:471
121650360irq/29-eth0_g0_31408-21/usr/sbin/munin08:15:380
121650360irq/29-eth0_g0_31408-21/usr/sbin/munin08:15:380
121650360irq/29-eth0_g0_1964-21runrttasks07:23:050
121650360irq/29-eth0_g0_17017-21ntp_states07:15:450
1407599352cyclictest26733-21memory07:55:421
1407599351cyclictest254342sleep107:50:411
1407599351cyclictest2004-21grep08:25:481
121650350irq/29-eth0_g0_6207-21grep08:45:270
121650350irq/29-eth0_g0_2093-21snmpd07:37:570
121650350irq/29-eth0_g0_1964-21runrttasks08:47:190
121650350irq/29-eth0_g0_1964-21runrttasks08:39:020
121650350irq/29-eth0_g0_1964-21runrttasks08:25:120
121650350irq/29-eth0_g0_19537-21proc_pri07:25:450
1407599342cyclictest1983-21/usr/sbin/munin07:47:301
121650340irq/29-eth0_g0_25490-21/usr/sbin/munin07:50:420
121650340irq/29-eth0_g0_1964-21runrttasks08:55:450
121650340irq/29-eth0_g0_1964-21runrttasks07:50:050
121650340irq/29-eth0_g0_1964-21runrttasks07:34:570
121650340irq/29-eth0_g0_1964-21runrttasks07:06:100
121650340irq/29-eth0_g0_0-21swapper/007:10:510
121340ksoftirqd/131222-21taskset08:15:071
1407599331cyclictest317342sleep108:15:441
1407599331cyclictest317342sleep108:15:441
121650330irq/29-eth0_g0_3169-21sendmail_mailtr08:30:480
121650330irq/29-eth0_g0_23923-21latency_hist07:45:270
121650330irq/29-eth0_g0_1964-21runrttasks08:08:190
121650330irq/29-eth0_g0_0-21swapper/009:00:420
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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