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2026-06-24 - 18:36

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 20 highest latencies:
System rackbslot7s.osadl.org (updated Wed Jun 24, 2026 12:43:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
29172412156,96sleep20-21swapper/212:00:312
2411234211,311sleep22441-21latency_hist08:34:582
2411234211,311sleep22441-21latency_hist08:34:582
991122376,219sleep2364-21snmpd08:56:592
22674223566,20sleep20-21swapper/211:20:202
2746223418,32sleep20-21swapper/208:35:192
2746223418,32sleep20-21swapper/208:35:192
12251223227,192sleep212229-21grep10:49:592
10702223136,179sleep210710-21latency_hist10:44:582
3251222049,156sleep23266-21fschecks_count10:20:152
1872622128,182sleep218843-21gpgv11:09:582
1357721949,169sleep213602-21cpu09:10:122
24188218911,160sleep2225-21systemd-journal09:44:572
18181218511,162sleep218216-21ntpq07:40:272
736621807,19sleep27412-21ntpq12:15:212
31518217815,83sleep20-21swapper/210:05:292
20721217711,146sleep20-21swapper/207:50:002
2928217313,100sleep22973-21latency_hist10:19:582
9898217112,146sleep29903-21cut07:15:312
12964217110,73sleep20-21swapper/207:25:162
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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