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2026-04-05 - 10:21

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 Apr 05, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2953921540sleep1121650irq/29-eth0_g0_00:16:491
2408921070sleep1121650irq/29-eth0_g0_21:42:401
131062760sleep1121750irq/30-eth0_g0_23:09:511
62782710sleep1121750irq/30-eth0_g0_22:41:481
121570ksoftirqd/1121750irq/30-eth0_g0_19:54:271
234792560sleep1121650irq/29-eth0_g0_23:52:351
159182560sleep1121750irq/30-eth0_g0_21:09:471
121650540irq/29-eth0_g0_899watchdog/023:24:220
121520ksoftirqd/1121650irq/29-eth0_g0_23:47:130
25442510sleep1121750irq/30-eth0_g0_22:26:041
121500ksoftirqd/1121750irq/30-eth0_g0_23:17:231
121750490irq/30-eth0_g0_17005-21/usr/sbin/munin21:14:531
121650480irq/29-eth0_g0_31ksoftirqd/000:09:530
121480ksoftirqd/1121750irq/30-eth0_g0_00:03:431
121470ksoftirqd/1121750irq/30-eth0_g0_23:37:161
121470ksoftirqd/1121750irq/30-eth0_g0_23:09:281
121470ksoftirqd/1121650irq/29-eth0_g0_19:21:241
121650460irq/29-eth0_g0_18263-21unixbench_multi19:04:540
121650460irq/29-eth0_g0_18263-21unixbench_multi19:04:540
121460ksoftirqd/1121650irq/29-eth0_g0_20:35:311
229372450sleep1121750irq/30-eth0_g0_21:38:311
121750450irq/30-eth0_g0_1219-21kworker/1:221:49:571
121750450irq/30-eth0_g0_1219-21kworker/1:221:49:571
121450ksoftirqd/1121750irq/30-eth0_g0_23:20:381
121750440irq/30-eth0_g0_21219-21sed19:19:351
121440ksoftirqd/1121750irq/30-eth0_g0_23:02:301
121440ksoftirqd/1121650irq/29-eth0_g0_19:34:551
121750430irq/30-eth0_g0_24128-21awk19:29:531
121650430irq/29-eth0_g0_1875-21runrttasks23:40:150
121430ksoftirqd/1121650irq/29-eth0_g0_00:21:010
301992420sleep1121650irq/29-eth0_g0_22:07:321
121650420irq/29-eth0_g0_13-21kworker/0:123:52:350
121420ksoftirqd/1121750irq/30-eth0_g0_20:24:440
121420ksoftirqd/1121650irq/29-eth0_g0_23:45:291
121420ksoftirqd/1121650irq/29-eth0_g0_21:29:281
121750410irq/30-eth0_g0_32461-21taskset20:04:481
121750410irq/30-eth0_g0_31ksoftirqd/021:25:450
121750410irq/30-eth0_g0_121ksoftirqd/122:17:351
121650410irq/29-eth0_g0_31ksoftirqd/019:09:530
121650410irq/29-eth0_g0_13-21kworker/0:123:17:530
121650410irq/29-eth0_g0_13-21kworker/0:123:04:410
121650410irq/29-eth0_g0_13-21kworker/0:122:19:550
121650410irq/29-eth0_g0_13-21kworker/0:121:45:330
121410ksoftirqd/1121750irq/30-eth0_g0_19:57:290
121750400irq/30-eth0_g0_32474-21/usr/sbin/munin00:29:481
121750400irq/30-eth0_g0_18007-21taskset23:29:521
121750400irq/30-eth0_g0_18007-21taskset23:29:521
121750400irq/30-eth0_g0_1219-21kworker/1:223:55:031
121650400irq/29-eth0_g0_31ksoftirqd/021:15:520
121650400irq/29-eth0_g0_1876199cyclictest23:10:360
121650400irq/29-eth0_g0_13-21kworker/0:122:46:540
121650400irq/29-eth0_g0_13-21kworker/0:122:46:540
121650400irq/29-eth0_g0_13-21kworker/0:122:41:390
121650400irq/29-eth0_g0_13-21kworker/0:121:19:390
121650400irq/29-eth0_g0_13-21kworker/0:100:29:500
121650400irq/29-eth0_g0_0-21swapper/023:59:510
121650400irq/29-eth0_g0_0-21swapper/022:29:530
121650400irq/29-eth0_g0_0-21swapper/020:54:500
121400ksoftirqd/1121750irq/30-eth0_g0_22:56:340
121400ksoftirqd/1121750irq/30-eth0_g0_00:37:520
121750390irq/30-eth0_g0_9385-21missed_timers22:54:491
121750390irq/30-eth0_g0_121ksoftirqd/121:20:051
121750390irq/30-eth0_g0_121ksoftirqd/100:06:571
121650390irq/29-eth0_g0_321722sleep000:28:580
121650390irq/29-eth0_g0_25876-21missed_timers21:49:500
121650390irq/29-eth0_g0_25876-21missed_timers21:49:500
121650390irq/29-eth0_g0_13-21kworker/0:123:59:300
121650390irq/29-eth0_g0_13-21kworker/0:122:49:480
121650390irq/29-eth0_g0_13-21kworker/0:122:16:180
121650390irq/29-eth0_g0_13-21kworker/0:121:58:560
121390ksoftirqd/1121750irq/30-eth0_g0_23:35:100
121390ksoftirqd/1121750irq/30-eth0_g0_23:31:540
121390ksoftirqd/1121750irq/30-eth0_g0_23:31:540
121390ksoftirqd/1121750irq/30-eth0_g0_23:25:550
121390ksoftirqd/1121750irq/30-eth0_g0_22:34:540
121390ksoftirqd/1121750irq/30-eth0_g0_22:14:000
121390ksoftirqd/1121750irq/30-eth0_g0_21:44:250
121390ksoftirqd/1121750irq/30-eth0_g0_21:02:440
121390ksoftirqd/1121750irq/30-eth0_g0_20:39:540
121390ksoftirqd/1121750irq/30-eth0_g0_20:31:050
121390ksoftirqd/1121750irq/30-eth0_g0_20:22:260
121390ksoftirqd/1121750irq/30-eth0_g0_19:41:090
121390ksoftirqd/1121750irq/30-eth0_g0_19:32:320
121390ksoftirqd/1121750irq/30-eth0_g0_00:15:140
1876299381cyclictest19096-21cat19:09:481
1876299381cyclictest15684-21diskmemload22:49:341
1876299381cyclictest15684-21diskmemload22:49:341
1876299381cyclictest11447-21awk20:49:551
121750380irq/30-eth0_g0_1219-21kworker/1:223:41:121
121750380irq/30-eth0_g0_1219-21kworker/1:200:25:491
121750380irq/30-eth0_g0_121ksoftirqd/122:19:571
121750380irq/30-eth0_g0_121ksoftirqd/100:21:521
121650380irq/29-eth0_g0_31ksoftirqd/022:27:320
121650380irq/29-eth0_g0_31ksoftirqd/021:35:320
121650380irq/29-eth0_g0_13-21kworker/0:122:08:000
121650380irq/29-eth0_g0_13-21kworker/0:121:32:370
121380ksoftirqd/1121750irq/30-eth0_g0_19:25:030
121380ksoftirqd/1121650irq/29-eth0_g0_21:46:031
1876299371cyclictest9148-21sed20:39:541
1876299371cyclictest302362sleep119:54:511
1876299371cyclictest3007-21df_abs22:29:461
1876299371cyclictest27663-21wc00:09:481
1876299371cyclictest0-21swapper/122:11:521
121750370irq/30-eth0_g0_1219-21kworker/1:223:26:241
121750370irq/30-eth0_g0_1219-21kworker/1:222:36:411
121750370irq/30-eth0_g0_1219-21kworker/1:222:00:161
121750370irq/30-eth0_g0_0-21swapper/121:59:021
121650370irq/29-eth0_g0_31ksoftirqd/022:00:220
121650370irq/29-eth0_g0_28632-21cpu19:49:450
121650370irq/29-eth0_g0_2189-21lldpd22:59:530
1876299362cyclictest23160-21grep19:24:551
1876299361cyclictest6678-21sed20:29:571
1876299361cyclictest31399-21cat19:59:511
1876299361cyclictest31399-21cat19:59:511
121750360irq/30-eth0_g0_8576-21taskset22:50:051
121750360irq/30-eth0_g0_1219-21kworker/1:221:29:431
121650360irq/29-eth0_g0_26879-21unixbench_singl00:04:570
121650360irq/29-eth0_g0_25423-21chrt19:34:530
121650360irq/29-eth0_g0_21563-21latency19:19:480
121650360irq/29-eth0_g0_13-21kworker/0:121:11:410
121650360irq/29-eth0_g0_11529-21unixbench_multi20:49:560
1876299351cyclictest9739-21df_abs20:44:471
1876299351cyclictest4259-21grep20:19:561
1876299351cyclictest14683-21sed21:04:471
1876299351cyclictest13302sleep120:09:491
1876299351cyclictest0-21swapper/119:39:491
121650350irq/29-eth0_g0_7629-21ntp_states20:34:520
121650350irq/29-eth0_g0_27539-21df_abs19:44:460
121650350irq/29-eth0_g0_1876299cyclictest20:59:531
121650350irq/29-eth0_g0_1875-21runrttasks20:11:010
121650350irq/29-eth0_g0_15174-21grep21:04:570
1876299341cyclictest0-21swapper/120:24:561
121750340irq/30-eth0_g0_2459-21df20:14:461
121750340irq/30-eth0_g0_17884-21ls19:04:481
121750340irq/30-eth0_g0_17884-21ls19:04:481
121750340irq/30-eth0_g0_1219-21kworker/1:200:36:471
121340ksoftirqd/1121750irq/30-eth0_g0_20:49:210
1876299331cyclictest28140-21vmstat19:44:561
121650330irq/29-eth0_g0_32604-21missed_timers20:04:510
121650330irq/29-eth0_g0_31309-21iostat19:59:490
121650330irq/29-eth0_g0_31309-21iostat19:59:490
121650330irq/29-eth0_g0_2981-21sed20:14:550
121650330irq/29-eth0_g0_1875-21runrttasks19:16:140
121750320irq/30-eth0_g0_0-21swapper/120:59:351
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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