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2026-07-17 - 02:06

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 792 highest latencies:
System rack3slot5s.osadl.org (updated Fri Jul 17, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
407521550sleep1121650irq/29-eth0_g0_21:50:151
1014921260sleep0121750irq/30-eth0_g0_22:14:460
2006321030sleep0121650irq/29-eth0_g0_22:56:150
173562660sleep1121650irq/29-eth0_g0_22:43:131
107012650sleep0121750irq/30-eth0_g0_20:03:050
295342580sleep0121650irq/29-eth0_g0_21:19:500
310852570chrt121750irq/30-eth0_g0_23:41:180
18752540sleep1121750irq/30-eth0_g0_21:42:491
18752540sleep1121750irq/30-eth0_g0_21:42:491
21412530sleep0121650irq/29-eth0_g0_23:54:050
21412530sleep0121650irq/29-eth0_g0_23:54:050
121530ksoftirqd/1121750irq/30-eth0_g0_22:51:041
285282510sleep0121650irq/29-eth0_g0_23:30:050
121510ksoftirqd/1121750irq/30-eth0_g0_21:25:221
121650490irq/29-eth0_g0_0-21swapper/023:48:120
33842470sleep1121750irq/30-eth0_g0_19:33:061
33842470sleep1121750irq/30-eth0_g0_19:33:061
121470ksoftirqd/129912sleep023:58:080
121470ksoftirqd/1121650irq/29-eth0_g0_20:02:361
121460ksoftirqd/1121650irq/29-eth0_g0_20:26:381
121460ksoftirqd/1121650irq/29-eth0_g0_20:26:381
121450ksoftirqd/1121650irq/29-eth0_g0_20:15:591
121650440irq/29-eth0_g0_28727-21unixbench_singl19:03:090
121440ksoftirqd/1121650irq/29-eth0_g0_20:41:291
121750430irq/30-eth0_g0_1219-21kworker/1:222:00:331
121430ksoftirqd/1121750irq/30-eth0_g0_00:11:421
121430ksoftirqd/1121650irq/29-eth0_g0_23:31:331
121430ksoftirqd/1121650irq/29-eth0_g0_19:51:571
121430ksoftirqd/1121650irq/29-eth0_g0_00:27:451
121430ksoftirqd/1121650irq/29-eth0_g0_00:00:231
121750420irq/30-eth0_g0_1219-21kworker/1:223:46:351
121650420irq/29-eth0_g0_31ksoftirqd/022:08:440
121650420irq/29-eth0_g0_13-21kworker/0:123:43:500
121650420irq/29-eth0_g0_13-21kworker/0:122:49:370
121650420irq/29-eth0_g0_13-21kworker/0:121:11:100
121420ksoftirqd/1121650irq/29-eth0_g0_22:53:381
2919699411cyclictest25675-21grep21:03:111
2919699411cyclictest10570-21unixbench_singl00:28:101
121750410irq/30-eth0_g0_13-21kworker/0:100:06:500
121750410irq/30-eth0_g0_1219-21kworker/1:223:05:001
121750410irq/30-eth0_g0_121ksoftirqd/123:10:221
121650410irq/29-eth0_g0_13-21kworker/0:123:35:200
121650410irq/29-eth0_g0_13-21kworker/0:123:14:490
121650410irq/29-eth0_g0_13-21kworker/0:122:33:190
121650410irq/29-eth0_g0_13-21kworker/0:122:23:010
121650410irq/29-eth0_g0_13-21kworker/0:100:28:450
121650410irq/29-eth0_g0_13-21kworker/0:100:23:040
121650410irq/29-eth0_g0_11554-21proc_pri00:33:070
121650410irq/29-eth0_g0_10501-21/usr/sbin/munin22:18:080
121650410irq/29-eth0_g0_10501-21/usr/sbin/munin22:18:080
121410ksoftirqd/1121750irq/30-eth0_g0_23:52:111
121750400irq/30-eth0_g0_121ksoftirqd/123:54:411
121750400irq/30-eth0_g0_121ksoftirqd/123:54:411
121750400irq/30-eth0_g0_121ksoftirqd/123:19:191
121650400irq/29-eth0_g0_31ksoftirqd/022:58:070
121650400irq/29-eth0_g0_13-21kworker/0:122:42:010
121650400irq/29-eth0_g0_13-21kworker/0:122:42:010
121650400irq/29-eth0_g0_13-21kworker/0:122:07:360
121650400irq/29-eth0_g0_13-21kworker/0:121:43:100
121650400irq/29-eth0_g0_13-21kworker/0:121:13:390
121650400irq/29-eth0_g0_13-21kworker/0:100:19:110
121650400irq/29-eth0_g0_13-21kworker/0:100:12:420
121650400irq/29-eth0_g0_0-21swapper/019:48:030
121400ksoftirqd/1121650irq/29-eth0_g0_23:13:001
121400ksoftirqd/1121650irq/29-eth0_g0_00:20:431
2919699392cyclictest1699-21latency_hist19:27:491
2919699391cyclictest5734-21taskset19:43:051
2919699391cyclictest17782-21grep20:33:001
2919699391cyclictest11147-21unixbench_multi22:18:111
2919699391cyclictest11147-21unixbench_multi22:18:111
237442390sleep0121650irq/29-eth0_g0_20:57:500
237442390sleep0121650irq/29-eth0_g0_20:57:500
121750390irq/30-eth0_g0_1219-21kworker/1:222:13:111
121750390irq/30-eth0_g0_1219-21kworker/1:221:30:501
121750390irq/30-eth0_g0_1219-21kworker/1:200:35:151
121750390irq/30-eth0_g0_121ksoftirqd/123:36:171
121750390irq/30-eth0_g0_121ksoftirqd/123:23:581
121650390irq/29-eth0_g0_31ksoftirqd/023:19:420
121650390irq/29-eth0_g0_31ksoftirqd/023:03:330
121650390irq/29-eth0_g0_31ksoftirqd/021:28:500
121650390irq/29-eth0_g0_31ksoftirqd/020:17:490
121650390irq/29-eth0_g0_31ksoftirqd/000:13:120
121650390irq/29-eth0_g0_29938-21df21:22:590
121650390irq/29-eth0_g0_252992sleep021:03:040
121650390irq/29-eth0_g0_13-21kworker/0:123:11:000
121650390irq/29-eth0_g0_13-21kworker/0:122:44:320
121650390irq/29-eth0_g0_13-21kworker/0:121:41:390
121650390irq/29-eth0_g0_13-21kworker/0:121:41:390
121390ksoftirqd/1121650irq/29-eth0_g0_23:00:091
2919699382cyclictest30778-21cat19:13:041
2919699381cyclictest30390-21missed_timers23:38:041
2919699381cyclictest29034-21awk21:18:061
2919699381cyclictest26117-21diskmemload00:04:551
2919699381cyclictest2317-21awk19:28:081
2919699381cyclictest14714-21wc22:33:111
2919699381cyclictest0-21swapper/121:53:381
121750380irq/30-eth0_g0_121ksoftirqd/121:37:111
121750380irq/30-eth0_g0_0-21swapper/122:28:451
121650380irq/29-eth0_g0_45092sleep019:38:040
121650380irq/29-eth0_g0_20463-21/usr/sbin/munin20:43:040
121650380irq/29-eth0_g0_1964-21runrttasks20:48:240
121650380irq/29-eth0_g0_1964-21runrttasks19:47:200
121650380irq/29-eth0_g0_13-21kworker/0:122:29:020
121650380irq/29-eth0_g0_13-21kworker/0:121:53:400
121650380irq/29-eth0_g0_13-21kworker/0:121:50:120
121650380irq/29-eth0_g0_13-21kworker/0:121:33:460
2919699371cyclictest32371-21unixbench_multi19:18:081
121750370irq/30-eth0_g0_1964-21runrttasks19:03:081
121750370irq/30-eth0_g0_1219-21kworker/1:221:46:001
121750370irq/30-eth0_g0_1219-21kworker/1:221:08:281
121750370irq/30-eth0_g0_121ksoftirqd/122:04:071
121750370irq/30-eth0_g0_0-21swapper/121:13:031
121650370irq/29-eth0_g0_32414-21unixbench_singl19:18:090
121650370irq/29-eth0_g0_31145-21grep19:13:110
121650370irq/29-eth0_g0_1964-21runrttasks19:24:480
121650370irq/29-eth0_g0_19254-21ntpdc20:38:070
121650370irq/29-eth0_g0_13-21kworker/0:123:23:040
121650370irq/29-eth0_g0_13-21kworker/0:121:57:570
121650370irq/29-eth0_g0_11936-21ntpq20:08:050
2919699361cyclictest8757-21taskset22:08:111
121750360irq/30-eth0_g0_29984-21unixbench_singl19:08:121
121750360irq/30-eth0_g0_14509-21rt-features20:18:091
121750360irq/30-eth0_g0_121ksoftirqd/122:24:031
121650360irq/29-eth0_g0_8559-21unixbench_singl19:53:090
121650360irq/29-eth0_g0_3514-21ps19:33:080
121650360irq/29-eth0_g0_3514-21ps19:33:080
121650360irq/29-eth0_g0_17720-21df_abs20:33:000
121650360irq/29-eth0_g0_14667-21unixbench_singl20:18:110
121650360irq/29-eth0_g0_121ksoftirqd/100:15:581
121360ksoftirqd/1121650irq/29-eth0_g0_20:08:091
121360ksoftirqd/1121650irq/29-eth0_g0_19:40:441
2919699351cyclictest164922sleep120:28:001
121650350irq/29-eth0_g0_22535-21/usr/sbin/munin20:53:030
121650350irq/29-eth0_g0_1964-21runrttasks19:09:000
121650350irq/29-eth0_g0_15205-21/usr/sbin/munin20:23:050
121650350irq/29-eth0_g0_15205-21/usr/sbin/munin20:23:050
121650350irq/29-eth0_g0_121ksoftirqd/120:03:061
121350ksoftirqd/1121650irq/29-eth0_g0_22:37:521
121350ksoftirqd/1121650irq/29-eth0_g0_22:37:521
2919699341cyclictest23886-21df_abs20:58:001
2919699341cyclictest23886-21df_abs20:58:001
121650340irq/29-eth0_g0_175582chrt20:32:480
121650340irq/29-eth0_g0_0-21swapper/019:58:040
2919699331cyclictest0-21swapper/120:56:451
121750330irq/30-eth0_g0_8554-21unixbench_singl19:53:091
121650330irq/29-eth0_g0_2372-21ls19:28:090
121650330irq/29-eth0_g0_22103-21runrttasks20:48:491
121650320irq/29-eth0_g0_2919699cyclictest20:43:031
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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