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2026-03-26 - 16:11

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 (updated Thu Mar 26, 2026 12:43:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2296027785,739sleep218030-21kworker/2:011:31:332
2296027785,739sleep218030-21kworker/2:011:31:332
25315266723,625sleep325379-21/usr/sbin/munin08:12:583
19963245850,64sleep20-21swapper/209:37:592
532023927,373sleep25365-21cat12:17:462
19323238520,344sleep019460-21/usr/sbin/munin07:53:200
7956225931,191sleep28028-21mailstats07:18:002
6772223622,192sleep16811-21cut12:22:461
849221614,115sleep2420-21/usr/sbin/munin12:02:512
849221614,115sleep2420-21/usr/sbin/munin12:02:512
28669220712,177sleep328759-21grep08:23:163
32012219537,59sleep20-21swapper/210:17:292
21754219510,123sleep221903-21tail09:43:042
16504219017,157sleep316541-21latency_hist07:47:293
2447221888,90sleep20-21swapper/209:52:462
13667218011,151sleep013742-21find09:17:580
11844217730,110sleep211954-21latency_hist07:32:302
20115217110,147sleep220151-21cpu07:57:422
10326216436,27sleep20-21swapper/209:07:582
1196821627,140sleep212034-21mailstats09:12:592
2610921609,136sleep226186-21sed08:17:292
11225216025,124sleep211302-21grep10:52:562
11225216025,124sleep211302-21grep10:52:562
1038421609,106sleep210479-21timerandwakeup12:32:572
27747215834,68sleep227923-21apt-config08:22:302
24516215729,58sleep20-21swapper/208:12:292
6448215648,21sleep20-21swapper/210:37:572
1897214729,24sleep20-21swapper/208:42:422
1897214729,24sleep20-21swapper/208:42:422
12082214719,18sleep20-21swapper/207:32:422
10158214719,109sleep310192-21proc_pri09:07:553
28963214621,103sleep329092-21grep11:47:583
15355214668,39sleep20-21swapper/207:42:482
723221445,128sleep00-21swapper/010:42:190
30994214124,94sleep031123-21latency_hist08:32:300
30994214124,94sleep031123-21latency_hist08:32:300
27058214129,100sleep227102-21ntpq11:42:522
25163214117,104sleep325298-21grep09:53:153
22926214131,72sleep222961-21munin-run08:07:282
18762214011,113sleep00-21swapper/011:17:460
31977213911,89sleep232112-21head08:33:002
31977213911,89sleep232112-21head08:33:002
5002213428,46sleep20-21swapper/208:52:432
28763213418,94sleep028842-21xargs08:23:170
31103213213,98sleep00-21swapper/011:57:280
2968121297,59sleep20-21swapper/208:27:392
2968121297,59sleep20-21swapper/208:27:392
28202212929,88sleep228212-21find11:47:372
9778212814,88sleep30-21swapper/312:32:413
15882212821,91sleep116034-21awk07:42:591
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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