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2025-09-18 - 08:43

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 highest latencies:
System rack5slot7s.osadl.org (updated Thu Sep 18, 2025 00:45:09)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
5474224072178,85sleep00-21swapper19:06:370
58989916816,126cyclictest26341-21diskstats21:15:430
58989916315,40cyclictest20292-21apt-get23:55:250
58989916014,120cyclictest8376-21apt-get22:45:250
58989915914,28cyclictest669-21cat22:00:000
58989915913,121cyclictest23622-21irqstats20:55:380
58989915912,26cyclictest28159-21apt-config21:25:130
58989915828,19cyclictest0-21swapper21:45:580
58989915817,117cyclictest17946-21df_inode20:20:280
58989915717,23cyclictest18719-21df23:45:280
58989915716,117cyclictest14587-21cat23:20:420
58989915711,107cyclictest5050-21apt-get22:25:130
58989915711,104cyclictest9345-21apt-config22:50:090
58989915635,23cyclictest14249-21modprobe23:20:000
58989915618,99cyclictest11055-21apt-get19:41:140
58989915616,24cyclictest6692-21munin-run19:15:020
58989915614,116cyclictest2220-21head22:06:050
58989915611,122cyclictest12758-21sort19:46:090
58989915514,118cyclictest1488-21apt22:05:010
58989915513,41cyclictest3896-21apt-get22:21:480
58989915513,28cyclictest16892-21modprobe23:35:000
58989915513,120cyclictest27810-21munin-run00:40:020
58989915511,104cyclictest15075-21apt-get23:26:300
5898991549,24cyclictest25253-21apt-key21:10:130
5898991549,121cyclictest16674-21cut20:10:580
58989915428,21cyclictest26314-21apt-get00:30:170
58989915415,115cyclictest21815-21sort00:01:040
58989915415,114cyclictest10462-21df_inode19:35:280
58989915414,99cyclictest25350-21apt-get00:25:270
58989915412,121cyclictest27731-1kworker/u3:321:21:450
58989915317,24cyclictest8761-21apt-get19:25:140
58989915316,113cyclictest11034-21sendmail23:00:000
58989915218,24cyclictest18741-21df_inode20:25:280
58989915218,109cyclictest7240-21df_inode19:15:460
58989915214,24cyclictest30174-21grep21:35:510
58989915119,107cyclictest13317-21ntp_states19:50:530
58989915119,105cyclictest5843-21apt-get22:30:170
58989915116,37cyclictest23099-21memory00:10:480
58989915116,23cyclictest22957-21tr20:50:530
58989915116,112cyclictest24371-21df21:00:250
58989915115,20cyclictest8169-21users22:41:050
58989915114,115cyclictest20722-21cut20:35:590
58989915113,59cyclictest24277-21kworker/u2:221:30:190
58989915113,49cyclictest3186-21/usr/sbin/munin22:15:220
58989915032,21cyclictest20170-21apt-config23:55:070
58989915018,22cyclictest17929-21df_inode23:40:300
58989915017,35cyclictest17702-21munin-run23:40:010
58989915015,25cyclictest21378-21ntp_states20:40:500
58989915013,23cyclictest24910-21wc00:20:570
58989915013,113cyclictest15659-21memory20:05:430
58989915012,111cyclictest17009-21apt-get20:15:130
5898991489,116cyclictest23650-21/usr/sbin/munin00:15:490
58989914834,96cyclictest13860-21cstates19:55:220
58989914820,27cyclictest6933-21memory22:35:470
58989914810,116cyclictest15040-21zcat20:00:540
58989914721,26cyclictest19548-21diskstats20:30:320
58989914716,36cyclictest2491-21df22:10:270
58989914710,115cyclictest11259-21/usr/sbin/munin23:00:280
58989914628,21cyclictest0-21swapper20:45:270
58989914616,106cyclictest13446-21apt23:15:000
58989914614,110cyclictest12059-21df23:05:280
58989914613,91cyclictest2821-21snmpd19:33:180
58989914613,30cyclictest30874-21/usr/sbin/munin21:40:390
58989914512,110cyclictest7963-21/usr/sbin/munin19:20:360
58989914418,26cyclictest22159-21df00:05:280
58989914417,26cyclictest25097-21apt-get21:10:030
58989914116,25cyclictest32294-21sshd21:50:280
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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