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2026-06-23 - 05:44

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 792 highest latencies:
System rack5slot7s.osadl.org (updated Tue Jun 23, 2026 00:45:09)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
16279224402206,95sleep00-21swapper19:09:540
163379916617,124cyclictest8750-21apt21:40:020
163379915918,31cyclictest21778-21apt-get23:00:220
163379915817,23cyclictest12984-21df22:05:280
163379915814,104cyclictest25517-21ntp_states23:21:380
163379915732,101cyclictest28065-21sed20:16:020
163379915721,29cyclictest28370-21diskstats20:20:340
163379915720,30cyclictest22637-21memory19:45:430
163379915716,100cyclictest24833-21apt-get20:00:270
163379915713,40cyclictest28668-21apt-get23:40:210
163379915712,123cyclictest246-21in:imuxsock21:22:220
16337991569,106cyclictest12784-21systemd-journal21:45:000
163379915422,106cyclictest3543-21diskstats00:25:350
163379915417,114cyclictest4502-21apt-get21:16:060
163379915416,25cyclictest16247-21df22:25:240
163379915416,22cyclictest17143-21munin-node19:15:060
163379915414,116cyclictest31346-21munin-run20:40:020
163379915413,41cyclictest19834-21unixbench_singl19:26:010
163379915411,26cyclictest21206-21fgrep19:35:560
163379915411,120cyclictest26717-21apt-get23:31:060
163379915319,28cyclictest3013-21apt-get21:05:190
163379915315,28cyclictest4504-21munin-run21:15:030
163379915314,117cyclictest23887-21munin-run19:55:010
163379915312,118cyclictest28547-21munin-run23:40:030
163379915310,118cyclictest14289-21sed22:11:070
163379915230,20cyclictest0-21swapper23:15:300
163379915218,22cyclictest26706-21cron23:30:000
163379915217,22cyclictest31752-21munin-run00:00:030
163379915215,25cyclictest1391-21/usr/sbin/munin20:55:410
163379915213,24cyclictest12677-21wc22:01:030
163379915212,116cyclictest21018-21cstates22:55:230
163379915119,25cyclictest32531-21users00:01:060
163379915112,25cyclictest30141-21grep20:30:480
163379915021,27cyclictest6460-21apt-get21:25:200
163379915019,105cyclictest29576-21diskstats23:45:340
163379915018,107cyclictest26802-21irqstats20:10:400
163379915017,24cyclictest18448-21munin-run22:40:030
163379915016,93cyclictest2512-21munin-run00:20:020
163379915015,25cyclictest2752-21/usr/sbin/munin00:20:340
163379915014,25cyclictest20674-21modprobe19:35:010
163379915014,113cyclictest5717-21apt00:40:010
163379915012,24cyclictest32360-21/usr/sbin/munin20:45:250
163379914916,108cyclictest9667-21/usr/sbin/munin21:45:590
163379914914,29cyclictest1004-21/usr/sbin/munin00:10:320
163379914913,37cyclictest18821-21find19:20:540
163379914911,110cyclictest10610-21if_eth021:50:370
163379914910,27cyclictest13744-21kworker/u2:220:00:050
163379914820,101cyclictest20159-21apt-get22:50:200
163379914816,28cyclictest29711-21users20:26:070
163379914816,108cyclictest30357-21df23:50:250
163379914814,112cyclictest22298-21munin-run19:45:020
163379914813,22cyclictest15228-21munin-plugin-st22:20:010
163379914811,114cyclictest19360-21/usr/sbin/munin22:46:010
163379914717,26cyclictest17344-21irqstats19:15:160
163379914717,106cyclictest710-21diskstats20:50:330
163379914714,21cyclictest15534-21uname22:20:400
163379914713,25cyclictest7250-21/usr/sbin/munin21:30:330
163379914629,22cyclictest0-21swapper22:34:230
163379914619,26cyclictest23481-21diskstats23:10:350
163379914611,24cyclictest582-21proc_pri00:05:550
163379914611,115cyclictest11685-21find21:55:550
163379914525,99cyclictest4955-21latency_hist00:35:030
163379914520,25cyclictest22679-21df_inode23:05:290
163379914512,23cyclictest25838-21/usr/sbin/munin20:06:070
163379914512,108cyclictest19224-21who22:41:060
163379914416,28cyclictest2391-21irqstats21:00:400
163379914413,28cyclictest31814-21/usr/sbin/munin20:40:520
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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