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2026-06-10 - 00:33

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 Tue Jun 09, 2026 12:43:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
69822153138,1479sleep06983-21ntp_states12:28:180
69822153138,1479sleep06983-21ntp_states12:28:180
1571329950,121sleep011-21ksoftirqd/009:33:130
1571329950,121sleep011-21ksoftirqd/009:33:130
4407282918,794sleep34416-21/usr/sbin/munin08:58:093
29624273631,690sleep029626-21apt-get11:58:050
2377227240,20sleep00-21swapper/009:58:300
4336260913,578sleep14326-21apt-get08:58:071
306925736,555sleep03104-21ntpq10:33:200
612824128,388sleep017867-1kworker/0:0H09:03:070
19511239310,368sleep019547-21modprobe11:27:520
13492238219,347sleep313493-21sshd09:26:043
3467235917,291sleep03581-21grep08:53:260
4983225610,195sleep05050-21sort12:23:090
21995225140,197sleep022041-21ntpq11:33:170
20207224512,189sleep024024-21kworker/u8:409:47:570
25407223934,138sleep025547-21unixbench_multi11:43:270
1495822260,28sleep114953-21apt-get07:48:061
13685222379,51sleep00-21swapper/009:27:540
8249221556,88sleep00-21swapper/007:27:540
24417221556,55sleep00-21swapper/008:18:120
24417221556,55sleep00-21swapper/008:18:120
1972322080,16sleep20-21swapper/208:03:112
9869220552,133sleep00-21swapper/009:13:250
2659722040,40sleep01601-21cyclictest08:23:240
167022007,44sleep00-21swapper/008:48:210
167022007,44sleep00-21swapper/008:48:210
28150219510,144sleep028286-21unixbench_singl08:28:260
1317621947,149sleep013223-21grep07:43:090
1865721869,158sleep00-21swapper/009:42:560
3253821816,13sleep00-21swapper/008:43:200
2929821808,23sleep00-21swapper/010:13:250
2929821808,23sleep00-21swapper/010:13:250
2314321788,154sleep00-21swapper/011:38:020
2314321788,154sleep00-21swapper/011:38:020
2647621777,159sleep0363-21snmpd10:06:510
2647621777,159sleep0363-21snmpd10:06:510
8672217147,83sleep08816-21latency_hist10:52:550
3099021686,43sleep00-21swapper/010:19:350
105552168105,18sleep00-21swapper/010:58:120
159821668,141sleep01671-21latency_hist12:12:550
1826321649,143sleep018311-21basename07:58:130
4814216022,105sleep30-21swapper/310:38:243
23240216046,22sleep00-21swapper/009:57:540
6530215919,123sleep16536-21cpu12:28:071
6530215919,123sleep16536-21cpu12:28:071
5535215818,124sleep25601-21cat12:23:232
9502215614,127sleep39516-21irqstats09:13:163
18357215624,112sleep218420-21latency07:58:152
1649215616,39sleep00-21swapper/007:07:550
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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