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2026-07-16 - 04:28

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 Thu Jul 16, 2026 00:43:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
307412209118,2053sleep030734-21apt-get23:18:540
12553214359,1408sleep210410-21kworker/u8:200:04:132
2160276418,728sleep32275-21/usr/sbin/munin20:04:113
23979268414,653sleep123980-21sshd22:55:581
1767425059,481sleep117682-21ntpq00:19:061
1767425059,481sleep117682-21ntpq00:19:061
12143240415,323sleep212341-21rm00:03:402
1588239012,223sleep21602-21fschecks_count20:03:582
9750233514,303sleep09809-21/usr/sbin/munin20:29:070
2590222990,7sleep30-21swapper/321:19:153
1974622960,15sleep215470-21cyclictest19:19:082
17929225650,186sleep217986-21latency19:14:002
17929225650,186sleep217986-21latency19:14:002
936224174,88sleep2999-21latency21:44:012
23619223515,202sleep123687-21fschecks_time21:13:571
23619223515,202sleep123687-21fschecks_time21:13:571
31014223045,71sleep20-21swapper/219:54:012
4597222817,127sleep24689-21fschecks_time23:38:582
6390222474,77sleep20-21swapper/220:19:002
4185221825,37sleep20-21swapper/223:38:382
4185221825,37sleep20-21swapper/223:38:382
2616022138,125sleep226263-21grep23:03:582
31835221215,178sleep331848-21uname21:39:023
24797220955,92sleep224830-21sendmail21:18:382
24797220955,92sleep224830-21sendmail21:18:382
2408222039,87sleep224262-21gpgv19:33:422
25770219823,104sleep225784-21idleruntime-cro23:03:382
20835219817,165sleep020880-21/usr/sbin/munin21:04:070
21376219523,146sleep20-21swapper/219:24:582
9822219318,35sleep29967-21unixbench_multi23:54:082
9822219318,35sleep29967-21unixbench_multi23:54:082
21621218711,161sleep221725-21latency_hist00:33:402
32074218616,153sleep232150-21sendmail_mailtr21:39:092
20519218617,150sleep220555-21fschecks_count21:04:012
6011218516,16sleep20-21swapper/221:59:112
27949218510,92sleep227993-21unin-run21:28:392
27678218015,150sleep227717-21idleruntime19:44:002
27678218015,150sleep227717-21idleruntime19:44:002
11428218012,80sleep20-21swapper/220:34:092
9742217810,153sleep29781-21cat22:13:402
19330217319,128sleep20-21swapper/220:59:042
16898217312,148sleep216957-21awk00:18:382
15715216316,132sleep015727-21fschecks_count00:13:560
15850216215,89sleep215881-21tune2fs20:49:112
1848421599,137sleep218544-21cat22:39:122
3001021567,92sleep2364-21snmpd19:49:532
2241621569,85sleep222488-21cat00:34:092
22345215622,113sleep10-21swapper/119:28:411
2617215313,85sleep22664-21grep21:49:062
15685215213,58sleep215827-21unixbench_singl22:29:312
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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