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2026-08-06 - 12:29

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #5, 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.

Data to construct the above plot have been generated using the RT test utility cyclictest.

Total number of samples: 50.5 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 rack5slot7s.osadl.org (updated Thu Aug 06, 2026 00:45:08)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
26187224562201,97sleep00-21swapper19:06:550
265789916717,127cyclictest3057-21/usr/sbin/munin23:20:060
265789916314,124cyclictest15663-21sshd00:35:130
265789916116,123cyclictest12924-21apt-get00:21:060
265789916012,124cyclictest25639-21systemctl22:20:020
265789916011,39cyclictest12918-21modprobe00:20:010
265789915915,102cyclictest2893-21apt-get20:00:390
265789915913,121cyclictest26751-21wc19:10:240
265789915912,122cyclictest4539-21cat20:10:030
265789915818,22cyclictest15194-21munin-run21:15:010
265789915723,30cyclictest28640-21apt-get19:20:210
265789915718,38cyclictest31730-21munin-run19:40:020
265789915712,22cyclictest16106-21cat21:20:060
265789915613,101cyclictest1846-21apt-get19:55:260
265789915518,113cyclictest29074-21apt22:40:010
265789915516,26cyclictest32644-21/usr/sbin/munin19:45:220
265789915515,116cyclictest32165-21ntp_states19:40:550
265789915514,113cyclictest13707-21apt-get21:05:260
265789915510,122cyclictest13473-21wc21:02:030
26578991549,120cyclictest1796-21cat23:10:470
265789915428,107cyclictest23747-21awk22:05:550
265789915419,107cyclictest18510-21apt-get21:35:180
265789915415,39cyclictest4915-21tr20:10:480
265789915415,116cyclictest5527-21df20:15:280
265789915415,115cyclictest25786-21apt-get22:20:280
265789915318,28cyclictest29311-21diskstats22:40:340
265789915318,25cyclictest29995-21apt-get22:45:210
265789915310,118cyclictest32011-21find22:55:560
26578991529,24cyclictest12560-21munin-run21:00:020
26578991529,101cyclictest5063-21ls23:30:240
265789915223,28cyclictest15108-21memory00:30:450
265789915219,106cyclictest24242-21diskstats22:10:340
265789915217,23cyclictest7748-21apt20:30:010
265789915214,115cyclictest32410-21apt-get23:00:180
265789915211,28cyclictest11246-21unixbench_singl00:06:060
265789915128,20cyclictest0-21swapper19:51:010
265789915120,27cyclictest16922-21apt-get21:25:200
265789915119,27cyclictest8644-21apt-get20:35:170
265789915114,114cyclictest27981-21irqstats19:15:570
265789915114,113cyclictest6619-21apt-get23:40:200
265789915114,112cyclictest6727-21run-parts20:20:580
265789915110,27cyclictest3200-21dpkg23:20:130
265789915036,94cyclictest30853-21cpuspeed22:50:210
265789915021,28cyclictest7415-21apt-get23:45:190
265789915014,111cyclictest21540-21grep21:51:040
265789915012,24cyclictest21933-21sed21:55:450
265789915012,112cyclictest11710-21ntpq00:10:450
265789915011,37cyclictest11470-21awk20:50:540
265789915011,22cyclictest27760-21grep22:30:400
265789914913,38cyclictest22640-21df22:00:270
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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