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2026-09-05 - 08:33

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 Sat Sep 05, 2026 00:43:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
159721190chrt121750irq/30-eth0_g0_21:53:150
1211090ksoftirqd/1121750irq/30-eth0_g0_20:52:191
121940ksoftirqd/1121750irq/30-eth0_g0_20:11:031
121640ksoftirqd/1121750irq/30-eth0_g0_22:27:500
121600ksoftirqd/1121750irq/30-eth0_g0_00:03:430
241562530sleep0121650irq/29-eth0_g0_21:12:310
261762510sleep1121750irq/30-eth0_g0_23:33:521
261762510sleep1121750irq/30-eth0_g0_23:33:521
11272510sleep1121750irq/30-eth0_g0_19:40:501
121500ksoftirqd/1121650irq/29-eth0_g0_23:58:580
121480ksoftirqd/1121750irq/30-eth0_g0_21:09:370
121480ksoftirqd/1121750irq/30-eth0_g0_00:21:581
121480ksoftirqd/1121750irq/30-eth0_g0_00:16:421
121480ksoftirqd/1121750irq/30-eth0_g0_00:16:421
121470ksoftirqd/1121750irq/30-eth0_g0_00:14:431
121460ksoftirqd/1121750irq/30-eth0_g0_23:22:461
121460ksoftirqd/1121750irq/30-eth0_g0_23:10:191
121460ksoftirqd/1121750irq/30-eth0_g0_22:25:181
121650450irq/29-eth0_g0_3632sleep021:48:310
121650450irq/29-eth0_g0_1964-21runrttasks19:04:300
121650450irq/29-eth0_g0_1964-21runrttasks19:04:300
121450ksoftirqd/1121750irq/30-eth0_g0_23:47:021
121450ksoftirqd/1121750irq/30-eth0_g0_23:15:521
121450ksoftirqd/1121750irq/30-eth0_g0_21:53:571
121450ksoftirqd/1121750irq/30-eth0_g0_21:42:541
121450ksoftirqd/1121750irq/30-eth0_g0_21:42:541
121450ksoftirqd/1121650irq/29-eth0_g0_19:32:531
121440ksoftirqd/1121750irq/30-eth0_g0_23:53:301
121440ksoftirqd/1121750irq/30-eth0_g0_23:12:351
121440ksoftirqd/1121750irq/30-eth0_g0_21:25:171
121440ksoftirqd/1121650irq/29-eth0_g0_21:46:331
121440ksoftirqd/1121650irq/29-eth0_g0_21:18:001
121750430irq/30-eth0_g0_1219-21kworker/1:223:58:321
121750430irq/30-eth0_g0_1219-21kworker/1:222:12:531
121750430irq/30-eth0_g0_1219-21kworker/1:221:13:561
121750430irq/30-eth0_g0_1219-21kworker/1:200:30:191
121650430irq/29-eth0_g0_189762sleep023:05:490
121650430irq/29-eth0_g0_0-21swapper/022:16:130
121430ksoftirqd/1121750irq/30-eth0_g0_22:47:091
121430ksoftirqd/1121650irq/29-eth0_g0_23:41:091
121430ksoftirqd/1121650irq/29-eth0_g0_19:52:571
2499199421cyclictest2580-21unixbench_multi21:56:101
121650420irq/29-eth0_g0_13-21kworker/0:123:52:410
121420ksoftirqd/1121750irq/30-eth0_g0_23:40:570
121650410irq/29-eth0_g0_13-21kworker/0:122:14:310
121650410irq/29-eth0_g0_121ksoftirqd/122:35:060
121410ksoftirqd/1121650irq/29-eth0_g0_22:35:271
2499199402cyclictest5321-21ntp_states19:56:061
2499199401cyclictest80302sleep100:31:081
121750400irq/30-eth0_g0_1511-21df_inode00:06:021
121750400irq/30-eth0_g0_1219-21kworker/1:222:56:311
121650400irq/29-eth0_g0_31ksoftirqd/023:24:520
121650400irq/29-eth0_g0_31ksoftirqd/020:56:030
121650400irq/29-eth0_g0_13-21kworker/0:123:50:250
121650400irq/29-eth0_g0_13-21kworker/0:121:41:290
121650400irq/29-eth0_g0_13-21kworker/0:121:41:290
121650400irq/29-eth0_g0_13-21kworker/0:100:27:210
121650400irq/29-eth0_g0_121ksoftirqd/100:15:470
2499199391cyclictest28087-21taskset19:16:101
2499199391cyclictest21989-21diskmemload22:53:111
2499199391cyclictest140532sleep120:31:091
2499199391cyclictest12522-21cat20:26:021
121750390irq/30-eth0_g0_31ksoftirqd/000:25:480
121750390irq/30-eth0_g0_24983-21latency_hist19:05:491
121750390irq/30-eth0_g0_24983-21latency_hist19:05:491
121650390irq/29-eth0_g0_31ksoftirqd/021:30:540
121650390irq/29-eth0_g0_2499099cyclictest22:41:520
121650390irq/29-eth0_g0_13-21kworker/0:123:38:040
121650390irq/29-eth0_g0_13-21kworker/0:122:00:080
121650390irq/29-eth0_g0_13-21kworker/0:121:40:120
121650390irq/29-eth0_g0_13-21kworker/0:121:26:340
121390ksoftirqd/1121750irq/30-eth0_g0_20:48:010
121390ksoftirqd/1121750irq/30-eth0_g0_00:32:450
2499199381cyclictest66062sleep120:01:071
2499199381cyclictest3103-21grep19:46:101
2499199381cyclictest17140-21grep20:45:491
121750380irq/30-eth0_g0_1219-21kworker/1:223:01:281
121750380irq/30-eth0_g0_1219-21kworker/1:222:07:241
121650380irq/29-eth0_g0_31ksoftirqd/023:31:110
121650380irq/29-eth0_g0_31ksoftirqd/023:31:110
121650380irq/29-eth0_g0_2499099cyclictest00:20:120
121650380irq/29-eth0_g0_2499099cyclictest00:20:120
121650380irq/29-eth0_g0_13-21kworker/0:123:27:480
121650380irq/29-eth0_g0_13-21kworker/0:123:10:130
121650380irq/29-eth0_g0_13-21kworker/0:123:00:020
121650380irq/29-eth0_g0_13-21kworker/0:122:54:020
121650380irq/29-eth0_g0_12418-21unixbench_singl22:36:090
2499199372cyclictest32737-21/usr/sbin/munin00:01:011
2499199372cyclictest1964-21runrttasks22:02:111
2499199371cyclictest9944-21sed22:26:131
2499199371cyclictest17175-21chrt20:46:001
2499199371cyclictest0-21swapper/123:27:521
230822370sleep1121750irq/30-eth0_g0_21:09:171
121750370irq/30-eth0_g0_1219-21kworker/1:223:38:111
121750370irq/30-eth0_g0_1219-21kworker/1:222:38:071
121750370irq/30-eth0_g0_0-21swapper/121:34:321
121650370irq/29-eth0_g0_8760-21unixbench_singl22:21:120
121650370irq/29-eth0_g0_29996-21cpu19:25:590
121650370irq/29-eth0_g0_21311-21ps21:01:070
121650370irq/29-eth0_g0_1964-21runrttasks20:51:160
121650370irq/29-eth0_g0_1964-21runrttasks20:41:370
121650370irq/29-eth0_g0_13-21kworker/0:123:16:370
121650370irq/29-eth0_g0_13-21kworker/0:123:13:570
121650370irq/29-eth0_g0_13-21kworker/0:122:02:370
2499199362cyclictest7375-21/usr/sbin/munin20:06:061
2499199362cyclictest7290-21proc_pri22:16:101
2499199361cyclictest305152sleep119:26:071
2499199361cyclictest21491-21grep21:01:151
2499199361cyclictest11783-21vmstat20:21:111
121750360irq/30-eth0_g0_1219-21kworker/1:221:37:381
121750360irq/30-eth0_g0_1219-21kworker/1:221:25:531
121750360irq/30-eth0_g0_121ksoftirqd/122:42:371
121650360irq/29-eth0_g0_7837-21proc_pri20:06:100
121650360irq/29-eth0_g0_4272-21timerandwakeup19:51:090
121650360irq/29-eth0_g0_25325-21cat19:06:020
121650360irq/29-eth0_g0_25169-21grep21:16:100
121650360irq/29-eth0_g0_1964-21runrttasks22:48:030
121650360irq/29-eth0_g0_1964-21runrttasks20:36:360
121650360irq/29-eth0_g0_1964-21runrttasks20:36:360
121650360irq/29-eth0_g0_1964-21runrttasks20:28:520
121650360irq/29-eth0_g0_1964-21runrttasks19:20:050
121650360irq/29-eth0_g0_1964-21runrttasks19:12:370
121650360irq/29-eth0_g0_13-21kworker/0:122:06:020
121650360irq/29-eth0_g0_13-21kworker/0:121:24:110
121650360irq/29-eth0_g0_13-21kworker/0:100:05:580
121650360irq/29-eth0_g0_11207-21taskset20:21:020
121650360irq/29-eth0_g0_11013-21date20:20:500
2499199351cyclictest15260-21find20:36:081
2499199351cyclictest15260-21find20:36:081
121650350irq/29-eth0_g0_5322-21seq19:56:060
121650350irq/29-eth0_g0_1964-21runrttasks20:01:060
121650350irq/29-eth0_g0_1964-21runrttasks19:36:450
2499199341cyclictest26286-21sed19:10:501
121650340irq/29-eth0_g0_31599-21awk19:31:060
121650340irq/29-eth0_g0_1964-21runrttasks20:33:240
121650340irq/29-eth0_g0_1964-21runrttasks19:20:550
121650340irq/29-eth0_g0_1777-21mailstats19:41:080
2499199331cyclictest0-21swapper/120:57:091
2499199331cyclictest0-21swapper/119:41:551
121650330irq/29-eth0_g0_9297-21grep20:11:090
2499199321cyclictest0-21swapper/120:17:381
121650320irq/29-eth0_g0_0-21swapper/119:25:501
121650310irq/29-eth0_g0_2738-21latency19:46:030
121650310irq/29-eth0_g0_27248-21runrttasks19:13:311
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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