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2026-09-07 - 15:15

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 Mon Sep 07, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1144621200sleep1121750irq/30-eth0_g0_09:05:581
1211160ksoftirqd/1121750irq/30-eth0_g0_11:13:161
121990ksoftirqd/1121750irq/30-eth0_g0_10:40:451
106462820sleep1121750irq/30-eth0_g0_11:15:541
121770ksoftirqd/1121750irq/30-eth0_g0_12:11:110
212912700sleep1121750irq/30-eth0_g0_11:59:331
121610ksoftirqd/1121750irq/30-eth0_g0_12:03:471
121610ksoftirqd/1121650irq/29-eth0_g0_11:33:311
121610ksoftirqd/1121650irq/29-eth0_g0_07:51:051
197852600sleep0121750irq/30-eth0_g0_09:40:540
121600ksoftirqd/1121750irq/30-eth0_g0_07:26:051
171642580sleep0121750irq/30-eth0_g0_07:16:000
121580ksoftirqd/1121750irq/30-eth0_g0_11:07:361
121570ksoftirqd/1121750irq/30-eth0_g0_09:51:081
121560ksoftirqd/1121650irq/29-eth0_g0_08:11:061
121550ksoftirqd/1121750irq/30-eth0_g0_10:48:411
121520ksoftirqd/1121750irq/30-eth0_g0_12:16:331
121510ksoftirqd/1121750irq/30-eth0_g0_12:21:381
121510ksoftirqd/1121650irq/29-eth0_g0_10:11:001
121500ksoftirqd/1121750irq/30-eth0_g0_10:31:061
121500ksoftirqd/1121650irq/29-eth0_g0_12:14:091
121500ksoftirqd/1121650irq/29-eth0_g0_10:15:531
121500ksoftirqd/1121650irq/29-eth0_g0_09:28:031
298472490sleep1121750irq/30-eth0_g0_12:34:411
298472490sleep1121750irq/30-eth0_g0_12:34:411
121650490irq/29-eth0_g0_19667-21unixbench_multi11:51:050
121490ksoftirqd/1121750irq/30-eth0_g0_09:11:001
121650480irq/29-eth0_g0_1435999cyclictest10:30:051
121480ksoftirqd/1121750irq/30-eth0_g0_12:26:361
121480ksoftirqd/1121750irq/30-eth0_g0_11:53:161
121480ksoftirqd/1121650irq/29-eth0_g0_11:37:241
121650470irq/29-eth0_g0_1435999cyclictest10:35:501
121470ksoftirqd/1121750irq/30-eth0_g0_11:48:220
121470ksoftirqd/1121750irq/30-eth0_g0_11:21:001
121470ksoftirqd/1121750irq/30-eth0_g0_09:18:381
121650460irq/29-eth0_g0_26299-21proc_pri10:06:030
121460ksoftirqd/1121750irq/30-eth0_g0_11:50:161
121460ksoftirqd/1121750irq/30-eth0_g0_09:47:311
121460ksoftirqd/1121750irq/30-eth0_g0_09:21:120
121460ksoftirqd/1121750irq/30-eth0_g0_09:21:120
121460ksoftirqd/1121750irq/30-eth0_g0_08:21:051
121460ksoftirqd/1121750irq/30-eth0_g0_08:20:441
121460ksoftirqd/1121650irq/29-eth0_g0_11:01:060
121460ksoftirqd/1121650irq/29-eth0_g0_08:01:001
121650450irq/29-eth0_g0_1435999cyclictest09:39:271
121450ksoftirqd/1121750irq/30-eth0_g0_11:42:460
121450ksoftirqd/1121750irq/30-eth0_g0_08:46:071
121450ksoftirqd/1121650irq/29-eth0_g0_10:59:471
14359994431cyclictest11035-21runrttasks09:05:231
121650440irq/29-eth0_g0_4618-21iostat10:50:560
121650440irq/29-eth0_g0_13-21kworker/0:110:01:010
121440ksoftirqd/1121750irq/30-eth0_g0_12:07:191
121440ksoftirqd/1121750irq/30-eth0_g0_12:07:190
121440ksoftirqd/1121750irq/30-eth0_g0_12:03:090
121440ksoftirqd/1121750irq/30-eth0_g0_11:59:390
121440ksoftirqd/1121750irq/30-eth0_g0_09:18:310
121440ksoftirqd/1121750irq/30-eth0_g0_09:11:470
121750430irq/30-eth0_g0_1435999cyclictest09:32:491
121650430irq/29-eth0_g0_13-21kworker/0:111:00:110
121430ksoftirqd/113856-21grep07:01:041
121430ksoftirqd/113856-21grep07:01:041
121430ksoftirqd/1121750irq/30-eth0_g0_11:22:350
121430ksoftirqd/1121750irq/30-eth0_g0_10:22:241
121430ksoftirqd/1121650irq/29-eth0_g0_11:06:110
121430ksoftirqd/1121650irq/29-eth0_g0_10:29:350
121650420irq/29-eth0_g0_13-21kworker/0:112:22:140
121420ksoftirqd/1121750irq/30-eth0_g0_10:18:570
121420ksoftirqd/1121750irq/30-eth0_g0_07:56:021
121420ksoftirqd/1121650irq/29-eth0_g0_10:06:311
121750410irq/30-eth0_g0_1435999cyclictest11:43:311
121650410irq/29-eth0_g0_1964-21runrttasks07:02:520
121650410irq/29-eth0_g0_1964-21runrttasks07:02:520
121650410irq/29-eth0_g0_1435899cyclictest11:17:230
121650410irq/29-eth0_g0_13-21kworker/0:112:35:090
121650410irq/29-eth0_g0_13-21kworker/0:112:35:090
121650410irq/29-eth0_g0_13-21kworker/0:111:36:200
121650410irq/29-eth0_g0_13-21kworker/0:110:49:440
121650410irq/29-eth0_g0_13-21kworker/0:110:36:120
121650410irq/29-eth0_g0_13-21kworker/0:109:55:250
121650410irq/29-eth0_g0_13-21kworker/0:109:37:080
121650410irq/29-eth0_g0_13-21kworker/0:109:33:150
121650410irq/29-eth0_g0_13-21kworker/0:109:29:480
121410ksoftirqd/1121750irq/30-eth0_g0_10:51:011
121410ksoftirqd/1121750irq/30-eth0_g0_10:31:010
121410ksoftirqd/1121750irq/30-eth0_g0_10:01:301
121410ksoftirqd/1121650irq/29-eth0_g0_11:28:511
121410ksoftirqd/1121650irq/29-eth0_g0_10:22:190
1435999407cyclictest8258-21vmstat08:51:051
14359994024cyclictest16934-21df_abs07:15:561
121650400irq/29-eth0_g0_13-21kworker/0:112:16:390
121650400irq/29-eth0_g0_13-21kworker/0:111:31:000
121650400irq/29-eth0_g0_13-21kworker/0:111:26:390
121650400irq/29-eth0_g0_13-21kworker/0:110:40:580
121650400irq/29-eth0_g0_13-21kworker/0:110:14:390
121650400irq/29-eth0_g0_13-21kworker/0:109:58:100
121650400irq/29-eth0_g0_13-21kworker/0:109:58:100
121650400irq/29-eth0_g0_13-21kworker/0:109:06:350
121400ksoftirqd/1121650irq/29-eth0_g0_11:02:011
1435999397cyclictest0-21swapper/109:21:001
1435999397cyclictest0-21swapper/109:21:001
1435999392cyclictest241732sleep109:56:361
1435999392cyclictest241732sleep109:56:361
121650390irq/29-eth0_g0_13-21kworker/0:111:13:350
121650390irq/29-eth0_g0_13-21kworker/0:109:50:430
1435999381cyclictest1521-21sed08:25:551
121650380irq/29-eth0_g0_1964-21runrttasks08:36:330
121650380irq/29-eth0_g0_14917-21proc_pri07:06:030
121650380irq/29-eth0_g0_13-21kworker/0:112:30:210
121380ksoftirqd/1121650irq/29-eth0_g0_09:43:341
1435999377cyclictest206992sleep107:30:551
1435999376cyclictest25096-21runrttasks07:48:241
1435999375cyclictest190492sleep107:23:481
1435999371cyclictest5836-21chrt08:41:061
121650370irq/29-eth0_g0_1964-21runrttasks09:01:080
121650370irq/29-eth0_g0_1964-21runrttasks08:31:280
1435999362cyclictest29123-21df_abs08:05:551
1435999361cyclictest4542-21grep08:36:061
1435999361cyclictest22123-21ntp_kernel_pll_07:36:001
121650360irq/29-eth0_g0_5469-21netstat08:40:590
121650360irq/29-eth0_g0_31776-21missed_timers08:15:590
121650360irq/29-eth0_g0_23586-21unixbench_multi07:41:040
121650360irq/29-eth0_g0_21907-21forks07:35:560
121650360irq/29-eth0_g0_21227-21unixbench_singl07:31:050
121650360irq/29-eth0_g0_2011-21chrt08:26:030
121650360irq/29-eth0_g0_1964-21runrttasks08:54:250
121650360irq/29-eth0_g0_1964-21runrttasks07:50:100
121650360irq/29-eth0_g0_1964-21runrttasks07:14:010
1435999352cyclictest2845-21df_inode08:30:561
1435999351cyclictest23252-21missed_timers07:40:591
1435999351cyclictest15930-21latency07:10:591
1435999351cyclictest15582-21sort07:10:431
1435999351cyclictest0-21swapper/108:55:581
121650350irq/29-eth0_g0_26026-21unixbench_multi07:51:050
121650350irq/29-eth0_g0_19950-21unixbench_multi07:26:050
121650350irq/29-eth0_g0_1964-21runrttasks07:56:130
121650350irq/29-eth0_g0_0-21swapper/008:00:560
121650340irq/29-eth0_g0_30393-21sed08:10:560
121650340irq/29-eth0_g0_1964-21runrttasks08:55:440
121650340irq/29-eth0_g0_1964-21runrttasks08:20:520
121650340irq/29-eth0_g0_18727-21unixbench_multi07:21:050
121650330irq/29-eth0_g0_6836-21processes08:46:050
121650330irq/29-eth0_g0_0-21swapper/008:06:040
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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