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2026-04-14 - 18:11

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 Tue Apr 14, 2026 00:43:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1524221380chrt3129650irq/29-eth0_g0_23:17:401
778221260sleep03129650irq/29-eth0_g0_22:46:260
2427521220sleep13129650irq/29-eth0_g0_21:41:391
900921040sleep13129750irq/30-eth0_g0_22:51:281
265742750sleep13129750irq/30-eth0_g0_00:04:251
95002600sleep03129650irq/29-eth0_g0_22:54:260
88252550sleep03129650irq/29-eth0_g0_22:49:360
42452540sleep13129650irq/29-eth0_g0_22:33:061
138242510sleep13129750irq/30-eth0_g0_23:10:261
121490ksoftirqd/13129750irq/30-eth0_g0_19:29:341
121480ksoftirqd/13129750irq/30-eth0_g0_22:59:511
121480ksoftirqd/13129750irq/30-eth0_g0_00:20:051
121450ksoftirqd/13129650irq/29-eth0_g0_22:57:271
3129750440irq/30-eth0_g0_31295-21kworker/1:100:27:351
3129650440irq/29-eth0_g0_121ksoftirqd/121:17:560
121440ksoftirqd/13129750irq/30-eth0_g0_00:38:320
121440ksoftirqd/13129750irq/30-eth0_g0_00:38:320
121440ksoftirqd/13129650irq/29-eth0_g0_23:41:391
121440ksoftirqd/13129650irq/29-eth0_g0_23:41:391
121440ksoftirqd/13129650irq/29-eth0_g0_20:53:251
3129750430irq/30-eth0_g0_31295-21kworker/1:100:34:341
3129750430irq/30-eth0_g0_31295-21kworker/1:100:34:341
1889699431cyclictest15911-21diskmemload22:21:491
121430ksoftirqd/13129650irq/29-eth0_g0_23:54:321
121430ksoftirqd/13129650irq/29-eth0_g0_22:42:211
121430ksoftirqd/13129650irq/29-eth0_g0_22:04:291
3129750420irq/30-eth0_g0_31295-21kworker/1:121:24:411
3129750420irq/30-eth0_g0_0-21swapper/119:09:341
3129650420irq/29-eth0_g0_10631-21df_abs22:59:260
30562420sleep03129650irq/29-eth0_g0_22:28:320
1889699421cyclictest6844-21tail20:29:371
78662410sleep13129650irq/29-eth0_g0_22:47:251
3129750410irq/30-eth0_g0_31295-21kworker/1:123:19:281
3129750410irq/30-eth0_g0_121ksoftirqd/122:15:491
3129650410irq/29-eth0_g0_13-21kworker/0:121:54:100
231072410sleep03129750irq/30-eth0_g0_21:37:180
181372410sleep13129750irq/30-eth0_g0_21:16:361
140092410sleep03129650irq/29-eth0_g0_23:12:350
3129750400irq/30-eth0_g0_31295-21kworker/1:121:09:551
3129750400irq/30-eth0_g0_121ksoftirqd/122:09:571
3129750400irq/30-eth0_g0_121ksoftirqd/121:46:231
3129650400irq/29-eth0_g0_6063-21ntp_states22:39:310
3129650400irq/29-eth0_g0_31ksoftirqd/000:13:320
3129650400irq/29-eth0_g0_18445-21sed19:04:340
3129650400irq/29-eth0_g0_18445-21sed19:04:340
3129650400irq/29-eth0_g0_13-21kworker/0:123:46:070
3129650400irq/29-eth0_g0_13-21kworker/0:123:41:500
3129650400irq/29-eth0_g0_13-21kworker/0:123:41:500
3129650400irq/29-eth0_g0_13-21kworker/0:123:08:350
3129650400irq/29-eth0_g0_13-21kworker/0:122:09:260
3129650400irq/29-eth0_g0_13-21kworker/0:121:32:100
3129650400irq/29-eth0_g0_13-21kworker/0:121:26:580
3129650400irq/29-eth0_g0_13-21kworker/0:121:20:110
3129650400irq/29-eth0_g0_13-21kworker/0:100:31:260
3129650400irq/29-eth0_g0_13-21kworker/0:100:15:120
3129650400irq/29-eth0_g0_0-21swapper/000:22:570
1889699401cyclictest5606-21unixbench_multi20:24:361
1889699401cyclictest4232sleep100:29:291
121400ksoftirqd/13129650irq/29-eth0_g0_23:27:351
3129750390irq/30-eth0_g0_31295-21kworker/1:123:38:291
3129750390irq/30-eth0_g0_31295-21kworker/1:121:36:491
3129750390irq/30-eth0_g0_121ksoftirqd/121:22:241
3129750390irq/30-eth0_g0_121ksoftirqd/100:18:571
3129750390irq/30-eth0_g0_121ksoftirqd/100:13:501
3129650390irq/29-eth0_g0_3856-21tail22:29:360
3129650390irq/29-eth0_g0_31ksoftirqd/023:24:300
3129650390irq/29-eth0_g0_22605-21cat19:24:150
3129650390irq/29-eth0_g0_15911-21diskmemload23:34:310
3129650390irq/29-eth0_g0_121ksoftirqd/123:23:530
3129650390irq/29-eth0_g0_121ksoftirqd/122:09:040
1889699392cyclictest22019-21sort19:19:331
1889699391cyclictest28104-21find19:44:341
121390ksoftirqd/13129650irq/29-eth0_g0_22:37:171
3129750380irq/30-eth0_g0_32403-21seq20:04:141
3129750380irq/30-eth0_g0_31295-21kworker/1:122:27:211
3129750380irq/30-eth0_g0_31295-21kworker/1:100:03:541
3129650380irq/29-eth0_g0_29263-21proc_pri19:49:330
3129650380irq/29-eth0_g0_28800-21rt-features21:59:340
3129650380irq/29-eth0_g0_26742-21awk00:04:280
3129650380irq/29-eth0_g0_25401-21taskset21:45:290
3129650380irq/29-eth0_g0_24124-21iostat19:29:290
3129650380irq/29-eth0_g0_13-21kworker/0:123:59:030
3129650380irq/29-eth0_g0_13-21kworker/0:123:31:580
3129650380irq/29-eth0_g0_13-21kworker/0:123:16:360
3129650380irq/29-eth0_g0_13-21kworker/0:122:34:310
3129650380irq/29-eth0_g0_13-21kworker/0:121:39:270
3129650380irq/29-eth0_g0_13-21kworker/0:121:11:030
3129650380irq/29-eth0_g0_13-21kworker/0:100:01:420
1889699385cyclictest28808-21sendmail_mailqu21:59:351
1889699382cyclictest2175-21lldpd20:22:261
1889699381cyclictest9314-21unixbench_singl20:39:361
1889699381cyclictest20368-21df_inode19:14:281
1889699381cyclictest155582sleep121:05:111
1889699381cyclictest12188-21ntpq23:04:321
1889699381cyclictest10334-21proc_pri20:44:341
121380ksoftirqd/13129750irq/30-eth0_g0_22:21:160
121380ksoftirqd/13129650irq/29-eth0_g0_23:51:401
121380ksoftirqd/13129650irq/29-eth0_g0_23:33:371
121380ksoftirqd/13129650irq/29-eth0_g0_21:58:041
121380ksoftirqd/13129650irq/29-eth0_g0_19:54:031
3129750370irq/30-eth0_g0_1875-21runrttasks19:08:471
3129750370irq/30-eth0_g0_1875-21runrttasks19:08:471
3129750370irq/30-eth0_g0_13-21kworker/0:123:50:180
3129750370irq/30-eth0_g0_121ksoftirqd/123:47:141
3129650370irq/29-eth0_g0_31ksoftirqd/021:54:430
3129650370irq/29-eth0_g0_23324-21unixbench_multi19:24:350
3129650370irq/29-eth0_g0_13007-21unixbench_singl20:54:360
3129650370irq/29-eth0_g0_13-21kworker/0:122:16:110
3129650370irq/29-eth0_g0_13-21kworker/0:100:25:170
1889699372cyclictest262532sleep119:39:141
1889699372cyclictest262532sleep119:39:141
1889699372cyclictest0-21swapper/121:49:301
1889699371cyclictest13013-21head20:54:361
1889699371cyclictest0-21swapper/120:09:421
3129750360irq/30-eth0_g0_26878-21wc19:39:341
3129650360irq/29-eth0_g0_9039-21ntp_offset20:39:310
3129650360irq/29-eth0_g0_7718-21missed_timers20:34:300
3129650360irq/29-eth0_g0_7718-21missed_timers20:34:300
3129650360irq/29-eth0_g0_25961-21runrttasks19:35:520
3129650360irq/29-eth0_g0_25961-21runrttasks19:35:520
3129650360irq/29-eth0_g0_11696-21timerandwakeup20:49:350
1889699362cyclictest32534-21cpu20:04:251
1889699361cyclictest21356-21chrt21:29:351
1889699361cyclictest14176-21unixbench_multi20:59:351
1889699361cyclictest0-21swapper/120:35:581
1889699361cyclictest0-21swapper/120:35:581
1889699361cyclictest0-21swapper/120:19:151
3129650350irq/29-eth0_g0_9929-21df20:44:260
3129650350irq/29-eth0_g0_5651-21unixbench_singl20:24:360
3129650350irq/29-eth0_g0_27483-21wc19:44:140
3129650350irq/29-eth0_g0_19444-21proc_pri19:09:340
3129650350irq/29-eth0_g0_1889599cyclictest20:19:290
3129650350irq/29-eth0_g0_15192-21open_files21:04:320
3129650340irq/29-eth0_g0_498-21processes20:04:330
3129650340irq/29-eth0_g0_27558-21runrttasks19:44:160
3129650340irq/29-eth0_g0_13928-21awk20:59:310
3129650340irq/29-eth0_g0_0-21swapper/020:09:310
1889699341cyclictest305442sleep119:54:331
1889699341cyclictest22709-21cpu19:24:241
3129650330irq/29-eth0_g0_6863-21grep20:29:370
3129650330irq/29-eth0_g0_3203-21head20:14:360
3129650330irq/29-eth0_g0_31413-21seq19:59:270
3129650330irq/29-eth0_g0_30022-21/usr/sbin/munin19:54:300
3129650330irq/29-eth0_g0_20848-21taskset19:14:360
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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