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2026-09-07 - 11:48

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 Mon Sep 07, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
121930ksoftirqd/1121750irq/30-eth0_g0_19:00:581
121810ksoftirqd/1121750irq/30-eth0_g0_21:21:281
82202780sleep0121750irq/30-eth0_g0_19:46:040
150152750sleep1121750irq/30-eth0_g0_22:26:051
175192730sleep0121750irq/30-eth0_g0_22:36:070
241202720sleep1121650irq/29-eth0_g0_23:04:501
327672660sleep1121650irq/29-eth0_g0_19:15:541
139372640chrt121750irq/30-eth0_g0_22:21:061
61492600sleep0121750irq/30-eth0_g0_21:50:580
61492600sleep0121750irq/30-eth0_g0_21:50:580
44192600chrt121750irq/30-eth0_g0_19:31:021
30852600sleep1121750irq/30-eth0_g0_19:26:011
215462560sleep0121750irq/30-eth0_g0_20:41:020
272982510chrt121650irq/29-eth0_g0_21:05:541
315342500sleep0121650irq/29-eth0_g0_21:21:050
121750460irq/30-eth0_g0_250712sleep123:06:381
121750460irq/30-eth0_g0_1219-21kworker/1:223:23:161
81582450sleep0121650irq/29-eth0_g0_21:59:220
121650450irq/29-eth0_g0_31ksoftirqd/023:40:420
306642440sleep0121650irq/29-eth0_g0_21:18:080
121650440irq/29-eth0_g0_31ksoftirqd/021:46:090
121650440irq/29-eth0_g0_121ksoftirqd/121:52:151
121650440irq/29-eth0_g0_121ksoftirqd/121:52:151
121650440irq/29-eth0_g0_121ksoftirqd/121:00:571
130842430sleep1121750irq/30-eth0_g0_22:19:421
121750430irq/30-eth0_g0_7997-21grep19:46:001
121750430irq/30-eth0_g0_121ksoftirqd/122:39:541
121650430irq/29-eth0_g0_16152-21/usr/sbin/munin22:31:040
30225994236cyclictest22144-21missed_timers22:56:011
121650420irq/29-eth0_g0_31ksoftirqd/023:27:380
30225994135cyclictest9690-21grep00:16:061
121750410irq/30-eth0_g0_29215-21df_abs19:00:580
121650410irq/29-eth0_g0_13-21kworker/0:122:04:100
121650410irq/29-eth0_g0_12720-21/usr/sbin/munin00:31:030
121410ksoftirqd/1121650irq/29-eth0_g0_21:41:031
30225994035cyclictest5649-21seq19:36:041
30225994034cyclictest31867-21missed_timers19:11:001
30225994034cyclictest31867-21missed_timers19:11:001
121750400irq/30-eth0_g0_121ksoftirqd/100:00:371
121650400irq/29-eth0_g0_31ksoftirqd/019:40:550
121650400irq/29-eth0_g0_1964-21runrttasks21:30:210
121650400irq/29-eth0_g0_13-21kworker/0:123:18:570
121650400irq/29-eth0_g0_13-21kworker/0:123:00:230
121650400irq/29-eth0_g0_13-21kworker/0:122:21:010
121650400irq/29-eth0_g0_13-21kworker/0:122:11:420
121650400irq/29-eth0_g0_13-21kworker/0:121:42:310
121650400irq/29-eth0_g0_13-21kworker/0:121:31:190
121650400irq/29-eth0_g0_13-21kworker/0:100:26:340
121650400irq/29-eth0_g0_13-21kworker/0:100:01:180
121650400irq/29-eth0_g0_121ksoftirqd/120:01:051
121650400irq/29-eth0_g0_121ksoftirqd/119:41:041
121650400irq/29-eth0_g0_121ksoftirqd/100:11:011
121650400irq/29-eth0_g0_103392sleep122:06:141
121650400irq/29-eth0_g0_0-21swapper/023:51:040
121650400irq/29-eth0_g0_0-21swapper/019:31:070
121400ksoftirqd/1121650irq/29-eth0_g0_22:46:091
30225993934cyclictest5092-21ntp_offset21:46:051
30225993934cyclictest12171-21grep00:26:061
30225993934cyclictest10923-21unixbench_multi00:21:061
30225993933cyclictest16799-21sendmail_mailqu20:21:041
241892392sleep024323-21sed20:51:070
241892392sleep024323-21sed20:51:070
121750390irq/30-eth0_g0_74652sleep100:07:431
121750390irq/30-eth0_g0_311852sleep123:31:191
121750390irq/30-eth0_g0_1219-21kworker/1:223:39:291
121750390irq/30-eth0_g0_1219-21kworker/1:222:53:291
121750390irq/30-eth0_g0_1219-21kworker/1:222:00:321
121750390irq/30-eth0_g0_1219-21kworker/1:221:11:591
121750390irq/30-eth0_g0_1219-21kworker/1:200:31:091
121650390irq/29-eth0_g0_9541-21unixbench_multi19:51:060
121650390irq/29-eth0_g0_9341-21memory00:16:000
121650390irq/29-eth0_g0_4393-21latency23:56:010
121650390irq/29-eth0_g0_1964-21runrttasks23:33:120
121650390irq/29-eth0_g0_1964-21runrttasks20:48:410
121650390irq/29-eth0_g0_13-21kworker/0:123:43:170
121650390irq/29-eth0_g0_13-21kworker/0:123:24:510
121650390irq/29-eth0_g0_13-21kworker/0:123:12:070
121650390irq/29-eth0_g0_13-21kworker/0:123:01:000
121650390irq/29-eth0_g0_13-21kworker/0:122:53:160
121650390irq/29-eth0_g0_13-21kworker/0:122:41:410
121650390irq/29-eth0_g0_13-21kworker/0:122:41:410
121650390irq/29-eth0_g0_13-21kworker/0:122:27:350
121650390irq/29-eth0_g0_13-21kworker/0:100:08:590
121650390irq/29-eth0_g0_10804-21sendmail_mailqu00:21:050
121650390irq/29-eth0_g0_0-21swapper/022:06:100
121750380irq/30-eth0_g0_20768-21sshd20:37:121
121750380irq/30-eth0_g0_1219-21kworker/1:221:29:001
121750380irq/30-eth0_g0_121ksoftirqd/123:48:151
121750380irq/30-eth0_g0_121ksoftirqd/123:48:151
121650380irq/29-eth0_g0_31ksoftirqd/022:16:010
121650380irq/29-eth0_g0_31ksoftirqd/021:37:100
121650380irq/29-eth0_g0_26749-21unixbench_singl21:01:060
121650380irq/29-eth0_g0_1559-21/usr/sbin/munin19:20:570
121650380irq/29-eth0_g0_14397-21timerandwakeup20:11:050
121650380irq/29-eth0_g0_13-21kworker/0:123:47:090
121650380irq/29-eth0_g0_13-21kworker/0:123:47:090
121650380irq/29-eth0_g0_13-21kworker/0:122:47:310
121650380irq/29-eth0_g0_13-21kworker/0:121:07:460
121650380irq/29-eth0_g0_13-21kworker/0:100:11:080
30225993733cyclictest0-21swapper/119:20:561
30225993732cyclictest9234-21/usr/sbin/munin19:51:011
30225993732cyclictest30155-21open_files21:16:021
30225993731cyclictest16155-21seq20:20:361
30225993731cyclictest14201-21taskset20:11:021
121750370irq/30-eth0_g0_1219-21kworker/1:223:44:231
121750370irq/30-eth0_g0_1219-21kworker/1:222:33:291
121750370irq/30-eth0_g0_1219-21kworker/1:222:12:291
121750370irq/30-eth0_g0_1219-21kworker/1:222:05:021
121750370irq/30-eth0_g0_1219-21kworker/1:221:35:571
121650370irq/29-eth0_g0_30978-21grep19:06:070
121650370irq/29-eth0_g0_25386-21sendmail_mailst20:56:050
121650370irq/29-eth0_g0_20646-21unixbench_singl20:36:060
121650370irq/29-eth0_g0_1964-21runrttasks20:25:300
121650370irq/29-eth0_g0_1964-21runrttasks19:25:540
121650370irq/29-eth0_g0_1964-21runrttasks19:17:070
121650370irq/29-eth0_g0_18622-21runrttasks20:30:440
121650370irq/29-eth0_g0_13-21kworker/0:123:06:460
121650370irq/29-eth0_g0_13-21kworker/0:121:12:430
121370ksoftirqd/1121650irq/29-eth0_g0_23:29:371
30225993630cyclictest25974-21munin-run21:00:441
30225993630cyclictest1817-21runrttasks21:32:071
30225993624cyclictest18277-21taskset20:26:461
121750360irq/30-eth0_g0_1219-21kworker/1:222:41:141
121750360irq/30-eth0_g0_1219-21kworker/1:222:41:141
121750360irq/30-eth0_g0_0-21swapper/020:31:050
121650360irq/29-eth0_g0_32074-21/usr/sbin/munin19:11:050
121650360irq/29-eth0_g0_32074-21/usr/sbin/munin19:11:050
121650360irq/29-eth0_g0_1964-21runrttasks20:09:300
121650360irq/29-eth0_g0_15416-21ntp_kernel_err20:16:030
121650360irq/29-eth0_g0_10436-21memory19:56:020
30225993530cyclictest21790-21grep20:41:061
30225993529cyclictest6134-21runrttasks00:01:281
30225993529cyclictest31065-21runrttasks19:06:161
3022599351cyclictest10522-21awk19:56:031
121750350irq/30-eth0_g0_4081-21latency_hist23:55:441
121750350irq/30-eth0_g0_19345-21chrt20:31:061
121750350irq/30-eth0_g0_13289-21unixbench_singl20:06:071
121750350irq/30-eth0_g0_1219-21kworker/1:223:16:071
121750350irq/30-eth0_g0_0-21swapper/120:45:561
121650350irq/29-eth0_g0_5651-21chrt19:36:040
121650350irq/29-eth0_g0_11686-21cat20:01:010
30225993428cyclictest26331-21runrttasks23:11:561
121750340irq/30-eth0_g0_23993-21ntp_kernel_err20:51:011
121750340irq/30-eth0_g0_23993-21ntp_kernel_err20:51:011
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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