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2026-05-31 - 11:03

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 May 31, 2026 00:43:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2826429479,848sleep024690-1kworker/0:2H22:03:440
21448273721,697sleep221512-21/usr/sbin/munin23:23:562
11459233212,307sleep011521-21fschecks_time22:53:460
9268232217,133sleep00-21swapper/000:29:070
17604226788,52sleep00-21swapper/023:13:280
5743225097,63sleep00-21swapper/019:08:550
2236622429,198sleep022441-21grep21:43:580
20743223980,54sleep00-21swapper/023:23:290
1423122346,216sleep0363-21snmpd23:00:320
9587222516,190sleep09563-21latency_hist22:48:290
1837922206,173sleep00-21swapper/023:13:570
30174221618,182sleep230183-21/usr/sbin/munin22:08:512
14793220910,182sleep314943-21sed19:38:293
687220323,160sleep2734-21/usr/sbin/munin22:18:482
10600220340,148sleep010622-21kernelversion19:23:490
11152219819,55sleep011182-21cut21:08:490
2334121939,44sleep00-21swapper/021:48:420
5184219211,165sleep15247-21swap20:48:561
13434219110,168sleep013455-21cpu19:33:420
776521777,15sleep00-21swapper/020:58:400
2127217728,126sleep00-21swapper/022:23:460
2652421760,25sleep326528-21unixbench_singl23:38:583
636321689,147sleep1363-21snmpd19:11:341
27111216615,112sleep027238-21timerwakeupswit21:58:590
25496216486,56sleep00-21swapper/021:53:550
8421216216,121sleep28543-21grep20:58:582
4682216233,28sleep00-21swapper/020:48:430
3804216217,120sleep23827-21awk00:13:262
3804216217,120sleep23827-21awk00:13:262
1775921615,32sleep00-21swapper/019:47:430
1775921615,32sleep00-21swapper/019:47:430
2156821609,13sleep10-21swapper/119:58:501
31986215818,120sleep032061-21fschecks_time23:58:460
20367215817,18sleep20-21swapper/219:53:592
20367215817,18sleep20-21swapper/219:53:592
19412215810,24sleep00-21swapper/019:53:280
19412215810,24sleep00-21swapper/019:53:280
21501215723,113sleep00-21swapper/019:58:490
27575215611,57sleep027622-21ntp_kernel_pll_23:43:520
7706215316,122sleep37738-21proc_pri00:23:573
25337215217,59sleep025363-21munin-run23:38:270
9825215127,110sleep00-21swapper/022:48:410
3234721515,30sleep00-21swapper/022:14:580
23097215095,17sleep00-21swapper/020:03:500
3198121485,29sleep00-21swapper/020:31:390
15470214627,20sleep00-21swapper/019:38:550
22922214510,121sleep122811-21/usr/sbin/munin20:03:471
6626214343,90sleep0363-21snmpd00:19:170
7215214079,16sleep00-21swapper/000:23:370
460821385,35sleep00-21swapper/022:30:200
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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