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2026-06-28 - 11:38

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 100 highest latencies:
System rack5slot7s.osadl.org (updated Sun Jun 28, 2026 00:45:09)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
21971224652224,97sleep00-21swapper19:07:100
223369916318,23cyclictest28140-21uname23:00:420
223369915832,107cyclictest30304-21head19:51:040
223369915816,119cyclictest14986-21munin-run21:40:010
223369915813,121cyclictest6811-21users00:06:090
223369915722,28cyclictest15218-21diskstats21:40:350
223369915715,40cyclictest26918-21munin-run19:35:040
223369915618,27cyclictest2038-21apt-get20:20:150
223369915617,119cyclictest509-21df20:10:260
223369915614,117cyclictest9150-21munin-run21:05:050
223369915614,116cyclictest10692-21grep21:11:020
223369915614,100cyclictest29615-21apt-get23:10:230
22336991559,121cyclictest29552-21dpkg23:10:090
223369915532,22cyclictest31223-21users23:16:110
223369915518,36cyclictest8673-21df00:20:250
223369915518,111cyclictest26916-21apt-get19:35:550
223369915515,26cyclictest2933-21df20:25:260
223369915515,114cyclictest11658-21apt00:40:010
223369915514,117cyclictest9320-21apt-get21:05:240
223369915512,119cyclictest4209-21mailstats23:51:030
223369915417,113cyclictest17588-21df21:55:260
223369915414,116cyclictest5128-21munin-run20:40:030
223369915412,117cyclictest25268-21apt-get19:25:250
223369915410,25cyclictest32566-21wc23:25:540
223369915320,29cyclictest16807-21diskstats21:50:340
223369915318,28cyclictest7855-21diskstats00:15:360
223369915315,23cyclictest5456-21df00:00:240
223369915312,116cyclictest603-21cstates23:30:230
223369915235,22cyclictest12784-21systemd-journal22:57:250
223369915219,106cyclictest25639-21df22:45:250
223369915213,116cyclictest20980-21ntpq22:15:460
223369915212,115cyclictest23463-21df_inode19:15:250
223369915211,116cyclictest1961-21snmpd20:09:290
223369915210,99cyclictest26587-21sort22:50:470
223369915178,39cyclictest32076-21kworker/u2:421:25:140
223369915135,21cyclictest12784-21systemd-journal23:50:000
223369915117,26cyclictest31515-21memory20:00:430
223369915116,22cyclictest19218-21diskstats22:05:350
223369915114,113cyclictest10475-21ntp_offset00:30:500
223369915113,26cyclictest22857-21wc22:26:010
223369915111,114cyclictest31128-21sshd19:58:260
223369915016,23cyclictest11995-21df21:20:260
223369915015,115cyclictest2033-21munin-run23:40:020
223369915012,112cyclictest23924-21apt-get22:35:190
223369914917,92cyclictest23129-21munin-run19:15:020
223369914917,110cyclictest24988-21memory22:40:450
223369914913,24cyclictest25095-21munin-run19:25:020
223369914912,25cyclictest11864-21ls21:20:070
223369914910,28cyclictest29294-21/usr/sbin/munin19:45:560
223369914910,115cyclictest10044-21sshd00:27:250
223369914818,25cyclictest3628-21apt-get20:30:170
223369914810,117cyclictest4622-21ls23:55:240
223369914810,113cyclictest7033-21sshd00:10:260
223369914721,27cyclictest13488-21apt-get21:30:200
223369914720,23cyclictest7733-21df20:55:270
223369914720,108cyclictest32010-21grep23:21:030
223369914718,26cyclictest6140-21df20:45:260
223369914715,109cyclictest1310-21df_inode20:15:280
223369914714,107cyclictest21529-21apt-get22:20:130
223369914713,113cyclictest28070-21apt-get19:40:140
223369914712,27cyclictest1961-21snmpd20:52:390
223369914711,24cyclictest5534-21tr20:40:470
223369914632,94cyclictest16203-21ntpq21:45:490
223369914615,104cyclictest23124-21/usr/sbin/munin22:31:080
223369914613,22cyclictest18413-21df22:00:250
223369914418,26cyclictest2809-21users23:41:060
223369914414,27cyclictest20076-21irqstats22:10:390
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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