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2026-07-13 - 02:38

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #b, slot #7

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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Click here to display the system's profile data or here to proceed to next system.
Click on a legend element to toggle display of that core, ctrl-click inverts display, shift-click enables all.

Note that this system runs a non-RT kernel.
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, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 50 highest latencies:
System rackbslot7s.osadl.org (updated Sun Jul 12, 2026 12:43:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
104752135312,1329sleep17002-21kworker/1:208:53:281
15723283327,791sleep215724-21apt-get09:09:042
771026835,667sleep226851-1kworker/2:2H08:44:202
5696258624,523sleep25739-21ntpq10:19:182
31022257614,545sleep131032-21/usr/sbin/munin11:39:091
32724255911,533sleep132756-21irqstats11:44:141
23772255628,485sleep226851-1kworker/2:2H09:34:282
13610247620,439sleep313669-21/usr/sbin/munin10:44:143
3333241511,192sleep23398-21switchtime08:29:222
1249223537,307sleep212566-21find07:14:232
7287235114,316sleep07373-21unin-run08:43:540
31223230694,194sleep231241-21modprobe09:58:512
14368229715,264sleep014446-21memory12:29:130
2400229349,141sleep20-21swapper/210:09:122
1006722538,207sleep210135-21fschecks_time10:34:122
18527224813,222sleep018528-21sshd09:18:390
18527224813,222sleep018528-21sshd09:18:390
24161223438,149sleep224204-21apt11:18:512
12429223044,116sleep212354-21/usr/sbin/munin08:59:102
9886221712,163sleep210000-21timerwakeupswit08:49:252
2102522169,193sleep221147-21timerandwakeup09:24:222
15999221232,144sleep216011-21netstat12:34:152
21323221011,186sleep121372-21grep07:44:101
24801220654,59sleep20-21swapper/207:54:212
23217220610,107sleep20-21swapper/209:33:512
29589220441,96sleep229673-21switchtime08:09:232
18118219811,167sleep00-21swapper/007:34:070
13102219528,19sleep20-21swapper/210:43:532
13880219427,128sleep214024-21latency_hist12:28:542
13643218028,133sleep30-21swapper/309:03:523
6272216713,104sleep25879-21/usr/sbin/munin08:39:152
5010216724,122sleep35157-21grep08:34:243
32758216610,142sleep2382-21cat11:44:152
1810621660,7sleep10-21swapper/110:58:531
14288216637,27sleep20-21swapper/212:29:112
18008216513,136sleep018104-21latency_hist10:58:530
3219421629,54sleep232197-21cron11:43:512
1631216227,95sleep21666-21ntpq08:24:172
13809215715,93sleep29729-21cyclictest10:44:212
2235215642,96sleep22323-21timerwakeupswit11:49:242
29631215049,88sleep229666-21latency11:34:142
17144214910,95sleep20-21swapper/210:54:272
856121478,85sleep20-21swapper/212:09:242
856121478,85sleep20-21swapper/212:09:242
2043214617,114sleep32075-21proc_pri11:49:213
11814214438,61sleep311782-21apt-get10:39:213
4969214044,48sleep20-21swapper/211:59:142
23443213827,87sleep123554-21timerwakeupswit07:49:231
13558213516,104sleep113561-21entropy07:19:101
17648213430,68sleep217680-21awk09:14:172
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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