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2025-11-23 - 14:21

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 376 highest latencies:
System rack3slot5s.osadl.org (updated Sun Nov 23, 2025 12:43:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2159621340sleep0121650irq/29-eth0_g0_09:23:590
299312980sleep1121650irq/29-eth0_g0_09:56:031
121960ksoftirqd/1121750irq/30-eth0_g0_11:54:550
121850ksoftirqd/1121650irq/29-eth0_g0_11:50:060
121660ksoftirqd/1121650irq/29-eth0_g0_10:05:131
121660ksoftirqd/1121650irq/29-eth0_g0_10:05:131
43302580sleep0121650irq/29-eth0_g0_12:35:160
121540ksoftirqd/1121750irq/30-eth0_g0_10:56:491
121520ksoftirqd/1121750irq/30-eth0_g0_11:40:030
121500ksoftirqd/1121750irq/30-eth0_g0_08:24:011
121490ksoftirqd/1121750irq/30-eth0_g0_10:49:130
22042480sleep0121750irq/30-eth0_g0_12:29:050
121480ksoftirqd/1121750irq/30-eth0_g0_12:33:460
121480ksoftirqd/1121750irq/30-eth0_g0_08:40:490
121750460irq/30-eth0_g0_1219-21kworker/1:211:38:161
121460ksoftirqd/1121750irq/30-eth0_g0_11:30:051
121460ksoftirqd/1121650irq/29-eth0_g0_10:49:471
121650450irq/29-eth0_g0_20913-21cyclictest07:09:430
121750440irq/30-eth0_g0_1219-21kworker/1:210:43:531
121440ksoftirqd/1121750irq/30-eth0_g0_12:04:100
121440ksoftirqd/1121750irq/30-eth0_g0_11:24:430
121440ksoftirqd/1121750irq/30-eth0_g0_11:10:541
121440ksoftirqd/1121750irq/30-eth0_g0_10:59:461
121440ksoftirqd/1121750irq/30-eth0_g0_09:52:060
121440ksoftirqd/1121650irq/29-eth0_g0_12:15:031
121750430irq/30-eth0_g0_1219-21kworker/1:212:01:491
121750430irq/30-eth0_g0_1219-21kworker/1:209:36:161
121650430irq/29-eth0_g0_0-21swapper/009:59:560
121750420irq/30-eth0_g0_1219-21kworker/1:211:29:111
121750420irq/30-eth0_g0_1219-21kworker/1:211:29:111
121750420irq/30-eth0_g0_1219-21kworker/1:210:20:511
121650420irq/29-eth0_g0_295552sleep012:07:260
121420ksoftirqd/1121750irq/30-eth0_g0_10:15:071
121420ksoftirqd/1121650irq/29-eth0_g0_09:47:350
20916994128cyclictest17880-21missed_timers11:19:581
121750410irq/30-eth0_g0_1219-21kworker/1:212:10:041
121750410irq/30-eth0_g0_121ksoftirqd/112:25:591
121650410irq/29-eth0_g0_1894-21runrttasks07:21:050
121650410irq/29-eth0_g0_13-21kworker/0:112:10:380
121650410irq/29-eth0_g0_13-21kworker/0:111:16:330
121650410irq/29-eth0_g0_121ksoftirqd/111:50:011
20916994027cyclictest5202-21grep08:15:061
20916994026cyclictest14288-21runrttasks08:54:431
121750400irq/30-eth0_g0_1219-21kworker/1:211:44:561
121750400irq/30-eth0_g0_121ksoftirqd/111:08:051
121650400irq/29-eth0_g0_25505-21sed09:39:550
121650400irq/29-eth0_g0_1894-21runrttasks10:22:190
121650400irq/29-eth0_g0_13-21kworker/0:111:29:570
121650400irq/29-eth0_g0_13-21kworker/0:110:57:120
121650400irq/29-eth0_g0_13-21kworker/0:109:11:000
121400ksoftirqd/1121650irq/29-eth0_g0_10:35:571
121750390irq/30-eth0_g0_1219-21kworker/1:210:03:301
121650390irq/29-eth0_g0_32214-21unixbench_multi10:05:040
121650390irq/29-eth0_g0_32214-21unixbench_multi10:05:040
121650390irq/29-eth0_g0_13-21kworker/0:111:10:560
121650390irq/29-eth0_g0_13-21kworker/0:110:29:130
121390ksoftirqd/1121750irq/30-eth0_g0_12:22:580
11412390sleep1121750irq/30-eth0_g0_10:10:351
121750380irq/30-eth0_g0_1219-21kworker/1:212:21:321
121750380irq/30-eth0_g0_1219-21kworker/1:212:07:011
121750380irq/30-eth0_g0_1219-21kworker/1:210:45:151
121750380irq/30-eth0_g0_1219-21kworker/1:210:30:121
121750380irq/30-eth0_g0_1219-21kworker/1:210:24:561
121750380irq/30-eth0_g0_1219-21kworker/1:209:46:351
121750380irq/30-eth0_g0_1219-21kworker/1:209:22:451
121650380irq/29-eth0_g0_19295-21/usr/sbin/munin09:15:011
121650380irq/29-eth0_g0_19295-21/usr/sbin/munin09:15:011
121650380irq/29-eth0_g0_13-21kworker/0:111:48:480
121650380irq/29-eth0_g0_13-21kworker/0:110:53:210
121650380irq/29-eth0_g0_13-21kworker/0:109:54:560
121650380irq/29-eth0_g0_0-21swapper/007:52:320
121380ksoftirqd/1121750irq/30-eth0_g0_12:17:060
121750370irq/30-eth0_g0_19835-21df_abs07:04:551
121750370irq/30-eth0_g0_1219-21kworker/1:212:31:101
121750370irq/30-eth0_g0_1219-21kworker/1:211:55:031
121750370irq/30-eth0_g0_1219-21kworker/1:211:41:051
121750370irq/30-eth0_g0_1219-21kworker/1:211:14:591
121750370irq/30-eth0_g0_1219-21kworker/1:209:33:341
121750370irq/30-eth0_g0_121ksoftirqd/109:28:141
121650370irq/29-eth0_g0_6329-21sendmail_mailqu08:20:040
121650370irq/29-eth0_g0_32607-21wc07:55:050
121650370irq/29-eth0_g0_19186-21awk11:24:590
121650370irq/29-eth0_g0_19186-21awk11:24:590
121650370irq/29-eth0_g0_1894-21runrttasks10:37:240
121650370irq/29-eth0_g0_13-21kworker/0:111:02:330
121650370irq/29-eth0_g0_13-21kworker/0:110:44:210
121650370irq/29-eth0_g0_13-21kworker/0:110:12:560
121650370irq/29-eth0_g0_13-21kworker/0:109:15:170
121650370irq/29-eth0_g0_13-21kworker/0:109:15:170
121650370irq/29-eth0_g0_121ksoftirqd/109:40:061
121370ksoftirqd/1121750irq/30-eth0_g0_10:31:150
20916993624cyclictest22870-21sed07:15:051
20916993624cyclictest1254-21ntpq08:00:001
20916993623cyclictest31148-21cat07:49:591
121750360irq/30-eth0_g0_1219-21kworker/1:212:39:221
121750360irq/30-eth0_g0_1219-21kworker/1:209:53:151
121750360irq/30-eth0_g0_1219-21kworker/1:209:12:171
121750360irq/30-eth0_g0_0-21swapper/107:49:401
121650360irq/29-eth0_g0_1894-21runrttasks07:14:430
121650360irq/29-eth0_g0_13-21kworker/0:111:35:590
121650360irq/29-eth0_g0_13-21kworker/0:111:07:060
121650360irq/29-eth0_g0_13-21kworker/0:110:15:280
121650360irq/29-eth0_g0_13-21kworker/0:109:37:490
121650360irq/29-eth0_g0_13-21kworker/0:109:30:050
121650360irq/29-eth0_g0_13-21kworker/0:109:25:090
20916993523cyclictest29051-21grep07:40:101
20916993522cyclictest24989-21cat07:24:581
20916993522cyclictest10940-21chrt08:39:581
20916993521cyclictest28307-21date07:39:441
121650350irq/29-eth0_g0_8916-21unixbench_singl08:30:040
121650350irq/29-eth0_g0_4951-21taskset08:15:010
121650350irq/29-eth0_g0_2960-21runrttasks08:06:290
121650350irq/29-eth0_g0_26636-21unixbench_singl07:30:160
121650350irq/29-eth0_g0_22879-21tail07:15:050
121650350irq/29-eth0_g0_10144-21unixbench_singl08:35:040
121650350irq/29-eth0_g0_0-21swapper/008:56:110
121650350irq/29-eth0_g0_0-21swapper/007:35:010
20916993422cyclictest25985-21sed07:29:541
20916993420cyclictest3880-21sendmail_mailst08:10:041
20916993420cyclictest3880-21sendmail_mailst08:10:041
20916993420cyclictest10130-21unixbench_multi08:35:041
121750340irq/30-eth0_g0_8783-21sendmail_mailqu08:30:031
121650340irq/29-eth0_g0_943-21sed07:59:540
121650340irq/29-eth0_g0_7815-21runrttasks08:25:500
121650340irq/29-eth0_g0_3894-21/usr/sbin/munin08:10:050
121650340irq/29-eth0_g0_3894-21/usr/sbin/munin08:10:050
121650340irq/29-eth0_g0_30386-21runrttasks07:45:420
121650340irq/29-eth0_g0_28901-21ps07:40:080
121650340irq/29-eth0_g0_13385-21/usr/sbin/munin08:49:560
121650340irq/29-eth0_g0_12401-21wc08:45:060
121650340irq/29-eth0_g0_0-21swapper/008:59:580
20916993327cyclictest23697-21taskset07:19:561
20916993323cyclictest21000-21runrttasks07:09:491
20916993319cyclictest7660-21sed08:25:071
20916993319cyclictest17542-21taskset09:05:061
121750330irq/30-eth0_g0_1894-21runrttasks09:01:091
121750330irq/30-eth0_g0_1894-21runrttasks08:44:531
121650330irq/29-eth0_g0_24901-21/usr/sbin/munin07:24:560
121650330irq/29-eth0_g0_17297-21ps09:05:030
121750320irq/30-eth0_g0_2645-21wc08:05:031
121750320irq/30-eth0_g0_1894-21runrttasks08:57:151
121650320irq/29-eth0_g0_1894-21runrttasks07:59:391
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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