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2026-08-12 - 14:27

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 Wed Aug 12, 2026 00:43:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
126892297414,2946sleep012727-21kworker/u8:120:15:150
18003270215,670sleep018054-21/usr/sbin/munin22:15:200
1316625027,483sleep2367-21snmpd22:00:082
1316625027,483sleep2367-21snmpd22:00:082
9203246711,438sleep29345-21grep21:45:302
13160240413,376sleep113166-21ntpq20:15:371
28018238310,334sleep228088-21unin-run21:05:002
237802269120,130sleep223463-21/usr/sbin/munin00:15:242
26914225553,183sleep226945-21munin-plugin-st22:44:582
6739225158,147sleep26867-21latency_hist21:40:012
15434223726,182sleep00-21swapper/023:50:100
1630522349,206sleep216378-21mailstats20:25:312
1208622248,200sleep212146-21processes21:55:282
25368221318,137sleep225447-21latency_hist19:15:012
9019220514,167sleep19178-21latency_hist20:05:031
32677219518,62sleep20-21swapper/219:35:282
2765221947,45sleep20-21swapper/219:20:182
32592219254,79sleep232738-21grep23:00:292
30230218817,154sleep030300-21mailstats00:35:290
1666321888,52sleep20-21swapper/222:10:222
23669217223,14sleep20-21swapper/220:50:182
29392217045,107sleep229096-21/usr/sbin/munin19:25:222
10904216531,119sleep210955-21sort20:10:172
11809215935,105sleep20-21swapper/223:39:582
11809215935,105sleep20-21swapper/223:39:582
983021559,127sleep29337-21/usr/sbin/munin20:05:362
7240215233,58sleep27274-21idleruntime-cro19:59:592
27938215213,59sleep027946-21/usr/sbin/munin19:20:240
22438215214,122sleep221962-21apt-get19:05:082
22438215214,122sleep221962-21apt-get19:05:082
9632215021,105sleep09751-21cat23:30:310
17011214949,72sleep317008-21apt-get23:55:133
22398214731,100sleep20-21swapper/200:10:272
1548214435,67sleep20-21swapper/221:20:352
13859214415,94sleep00-21swapper/023:45:210
14543214340,65sleep214628-21latency20:20:222
3155213813,110sleep23218-21latency19:45:212
32087213664,54sleep20-21swapper/221:15:302
32087213664,54sleep20-21swapper/221:15:302
19501213543,78sleep218573-21/usr/sbin/munin00:00:382
2648621335,11sleep20-21swapper/219:15:292
31633213125,60sleep20-21swapper/223:00:002
15323213137,50sleep20-21swapper/222:05:292
15323213137,50sleep20-21swapper/222:05:292
6172212748,23sleep20-21swapper/223:20:202
22498212550,18sleep20-21swapper/222:30:122
22498212550,18sleep20-21swapper/222:30:122
1961821249,79sleep219679-21if_eth022:20:192
28453212315,95sleep128501-21latency00:30:211
31038212017,90sleep331081-21tr19:30:243
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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