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2026-08-09 - 20:54

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 Aug 09, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
541021710sleep1121650irq/29-eth0_g0_09:32:401
213332850sleep0121750irq/30-eth0_g0_10:37:300
121850ksoftirqd/1121750irq/30-eth0_g0_09:53:491
121790ksoftirqd/1121750irq/30-eth0_g0_10:42:041
121660ksoftirqd/1121750irq/30-eth0_g0_07:06:491
121660ksoftirqd/1121750irq/30-eth0_g0_07:06:491
75872630sleep0121650irq/29-eth0_g0_11:55:430
75872630sleep0121650irq/29-eth0_g0_11:55:430
121570ksoftirqd/1121750irq/30-eth0_g0_09:30:591
169212560sleep1121750irq/30-eth0_g0_12:32:131
48922550sleep0121750irq/30-eth0_g0_11:42:530
121510ksoftirqd/1121750irq/30-eth0_g0_12:25:581
121650490irq/29-eth0_g0_121ksoftirqd/110:07:410
121490ksoftirqd/1121650irq/29-eth0_g0_12:05:230
65862480chrt121650irq/29-eth0_g0_09:37:180
121650480irq/29-eth0_g0_31ksoftirqd/009:42:070
121480ksoftirqd/1121750irq/30-eth0_g0_11:31:301
121480ksoftirqd/1121750irq/30-eth0_g0_09:13:391
121460ksoftirqd/114392sleep007:06:540
121460ksoftirqd/114392sleep007:06:540
121460ksoftirqd/1121650irq/29-eth0_g0_11:00:441
121460ksoftirqd/1121650irq/29-eth0_g0_07:57:581
312652450sleep1121750irq/30-eth0_g0_11:18:541
121450ksoftirqd/1121750irq/30-eth0_g0_11:41:101
121450ksoftirqd/1121650irq/29-eth0_g0_11:53:381
121450ksoftirqd/1121650irq/29-eth0_g0_11:53:381
121450ksoftirqd/1121650irq/29-eth0_g0_10:56:521
121450ksoftirqd/1121650irq/29-eth0_g0_08:18:211
121450ksoftirqd/1121650irq/29-eth0_g0_08:18:211
121750440irq/30-eth0_g0_1219-21kworker/1:211:32:081
121440ksoftirqd/1121750irq/30-eth0_g0_09:49:321
121440ksoftirqd/1121650irq/29-eth0_g0_12:05:381
121440ksoftirqd/1121650irq/29-eth0_g0_07:27:261
121412430sleep1121750irq/30-eth0_g0_12:12:151
121430ksoftirqd/1121750irq/30-eth0_g0_11:39:410
121430ksoftirqd/1121750irq/30-eth0_g0_10:15:591
121430ksoftirqd/1121750irq/30-eth0_g0_07:22:070
121430ksoftirqd/1121650irq/29-eth0_g0_10:59:360
121430ksoftirqd/1121650irq/29-eth0_g0_10:19:551
121650420irq/29-eth0_g0_13-21kworker/0:110:17:030
121650420irq/29-eth0_g0_13-21kworker/0:109:32:590
121420ksoftirqd/1121750irq/30-eth0_g0_10:04:491
121420ksoftirqd/1121650irq/29-eth0_g0_12:23:510
121420ksoftirqd/1121650irq/29-eth0_g0_10:37:141
121750410irq/30-eth0_g0_121ksoftirqd/110:35:020
121650410irq/29-eth0_g0_13-21kworker/0:112:31:520
121650410irq/29-eth0_g0_13-21kworker/0:111:34:350
121650410irq/29-eth0_g0_12632-21unixbench_multi10:02:140
121410ksoftirqd/1121750irq/30-eth0_g0_12:10:090
121410ksoftirqd/1121650irq/29-eth0_g0_09:50:050
1377994026cyclictest7933-21missed_timers07:32:081
121750400irq/30-eth0_g0_121ksoftirqd/112:00:271
121650400irq/29-eth0_g0_2271-21df_abs09:22:040
121650400irq/29-eth0_g0_2271-21df_abs09:22:040
121650400irq/29-eth0_g0_17070-21unixbench_singl12:32:140
121650400irq/29-eth0_g0_1507-21runrttasks11:31:280
121650400irq/29-eth0_g0_13-21kworker/0:111:17:130
121650400irq/29-eth0_g0_13-21kworker/0:111:03:060
121650400irq/29-eth0_g0_13-21kworker/0:109:13:000
121650400irq/29-eth0_g0_121ksoftirqd/111:07:101
121400ksoftirqd/1121750irq/30-eth0_g0_12:12:190
121400ksoftirqd/1121750irq/30-eth0_g0_11:14:380
121400ksoftirqd/1121750irq/30-eth0_g0_08:42:110
121400ksoftirqd/1121750irq/30-eth0_g0_08:30:380
121400ksoftirqd/1121750irq/30-eth0_g0_08:05:420
121400ksoftirqd/1121750irq/30-eth0_g0_07:27:150
121400ksoftirqd/1121650irq/29-eth0_g0_10:11:211
121400ksoftirqd/1121650irq/29-eth0_g0_08:34:331
137799391cyclictest25404-21grep08:42:141
121750390irq/30-eth0_g0_302471sendmail_mailtr09:02:141
121750390irq/30-eth0_g0_121ksoftirqd/112:18:421
121750390irq/30-eth0_g0_121ksoftirqd/110:34:261
121750390irq/30-eth0_g0_0-21swapper/111:13:101
121750390irq/30-eth0_g0_0-21swapper/109:45:241
121650390irq/29-eth0_g0_137699cyclictest09:28:440
121650390irq/29-eth0_g0_13-21kworker/0:112:18:570
121650390irq/29-eth0_g0_13-21kworker/0:111:22:030
121650390irq/29-eth0_g0_13-21kworker/0:110:51:300
121650390irq/29-eth0_g0_13-21kworker/0:110:31:450
121650390irq/29-eth0_g0_13-21kworker/0:110:24:060
121650390irq/29-eth0_g0_13-21kworker/0:110:11:570
121390ksoftirqd/1121750irq/30-eth0_g0_11:11:360
121390ksoftirqd/1121750irq/30-eth0_g0_10:54:360
121390ksoftirqd/1121750irq/30-eth0_g0_09:53:420
121390ksoftirqd/1121750irq/30-eth0_g0_09:18:000
121390ksoftirqd/1121750irq/30-eth0_g0_09:00:400
121390ksoftirqd/1121750irq/30-eth0_g0_08:50:300
121390ksoftirqd/1121650irq/29-eth0_g0_12:29:341
121390ksoftirqd/1121650irq/29-eth0_g0_07:47:141
121390ksoftirqd/1121650irq/29-eth0_g0_07:11:341
1377993833cyclictest31321-21ntp_states09:07:111
137799382cyclictest5486-21/usr/sbin/munin11:47:051
137799381cyclictest5126-21cat07:21:531
137799381cyclictest0-21swapper/107:22:071
121750380irq/30-eth0_g0_1219-21kworker/1:210:24:251
121750380irq/30-eth0_g0_121ksoftirqd/112:11:281
121750380irq/30-eth0_g0_121ksoftirqd/109:18:281
121650380irq/29-eth0_g0_9482-21unixbench_multi07:37:150
121650380irq/29-eth0_g0_9482-21unixbench_multi07:37:150
121650380irq/29-eth0_g0_30829-21diskmemload09:57:100
121650380irq/29-eth0_g0_27701-21ps08:52:100
121650380irq/29-eth0_g0_13-21kworker/0:111:49:510
121380ksoftirqd/1121750irq/30-eth0_g0_08:26:490
121380ksoftirqd/1121750irq/30-eth0_g0_07:14:020
121380ksoftirqd/1121650irq/29-eth0_g0_11:41:591
121380ksoftirqd/1121650irq/29-eth0_g0_11:01:531
137799372cyclictest21426-21wc08:27:091
137799371cyclictest2515-21sort09:22:081
137799371cyclictest2515-21sort09:22:081
137799371cyclictest20218-21netstat08:22:091
137799371cyclictest11233-21ps09:57:141
121750370irq/30-eth0_g0_1219-21kworker/1:210:48:531
121650370irq/29-eth0_g0_7954-21cat07:32:080
121650370irq/29-eth0_g0_31ksoftirqd/009:09:220
121650370irq/29-eth0_g0_31ksoftirqd/008:17:070
121650370irq/29-eth0_g0_31ksoftirqd/008:17:070
121650370irq/29-eth0_g0_13962-21if_eth007:57:070
121650370irq/29-eth0_g0_13-21kworker/0:111:57:090
121650370irq/29-eth0_g0_13-21kworker/0:110:44:100
121650370irq/29-eth0_g0_121ksoftirqd/110:29:051
137799361cyclictest60342sleep109:37:081
137799361cyclictest24206-21grep08:37:141
137799361cyclictest12523-21taskset07:52:031
137799361cyclictest0-21swapper/108:48:491
137799361cyclictest0-21swapper/108:07:051
121650360irq/29-eth0_g0_29992-21missed_timers09:02:080
121650360irq/29-eth0_g0_23002-21grep08:32:150
121650360irq/29-eth0_g0_1964-21runrttasks07:47:580
121650360irq/29-eth0_g0_1964-21runrttasks07:18:020
121650360irq/29-eth0_g0_1715-21latency07:07:080
121360ksoftirqd/1121650irq/29-eth0_g0_07:37:291
121360ksoftirqd/1121650irq/29-eth0_g0_07:37:291
137799352cyclictest17424-21/usr/sbin/munin08:12:131
137799351cyclictest3337-21grep07:12:151
137799351cyclictest28925-21proc_pri08:57:121
137799351cyclictest27368-21df_abs08:52:041
137799351cyclictest0-21swapper/107:46:521
121650350irq/29-eth0_g0_24236-21unixbench_singl08:37:150
121650350irq/29-eth0_g0_10598-21rt-features07:42:120
121650340irq/29-eth0_g0_1964-21runrttasks08:07:100
121650340irq/29-eth0_g0_13207-21unixbench_singl07:52:140
121650340irq/29-eth0_g0_121ksoftirqd/111:26:051
121340ksoftirqd/1121750irq/30-eth0_g0_08:16:110
137799331cyclictest155072sleep108:02:141
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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