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2026-09-24 - 04:40

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 all highest latencies:
System rack5slot7s.osadl.org (updated Thu Sep 24, 2026 00:45:08)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
7221224312198,90sleep00-21swapper19:06:190
76819916517,124cyclictest11235-21munin-run19:30:020
76819916315,124cyclictest5156-21df_inode22:10:340
76819916018,102cyclictest8488-21munin-node19:15:060
76819915917,118cyclictest12001-21ntp_states22:51:350
76819915915,102cyclictest22280-21apt-get23:56:090
76819915718,110cyclictest12199-21apt-get19:35:240
76819915717,110cyclictest9746-21apt-get19:20:180
76819915716,100cyclictest12034-21munin-run19:35:020
76819915715,23cyclictest9023-21diskstats19:15:490
76819915715,100cyclictest4257-21apt-get22:05:180
76819915618,96cyclictest31323-21memory21:30:470
76819915615,25cyclictest16278-21munin-run20:00:020
76819915613,120cyclictest19872-21apt23:40:020
76819915611,118cyclictest16631-21dpkg23:20:180
76819915610,65cyclictest13268-21wc19:40:310
76819915512,120cyclictest32586-21munin-run21:40:030
76819915511,102cyclictest23521-21apt-get20:46:410
76819915421,29cyclictest22937-21diskstats20:40:310
76819915418,23cyclictest21827-21memory23:50:460
76819915417,26cyclictest27861-21apt-get21:10:200
76819915416,25cyclictest29372-21munin-run21:20:010
76819915416,23cyclictest24882-21users00:06:080
76819915415,115cyclictest28528-21apt-get00:30:250
76819915413,118cyclictest20410-21apt-get20:25:200
76819915413,117cyclictest30192-21systemctl00:40:010
76819915314,111cyclictest29774-21/usr/sbin/munin21:20:480
76819915313,24cyclictest2125-21tr21:50:510
76819915216,99cyclictest26529-21munin-run00:20:010
76819915216,114cyclictest25332-21cron20:55:000
76819915216,111cyclictest17107-21sort20:05:040
76819915214,24cyclictest8588-21grep22:30:490
76819915214,24cyclictest14225-21memory19:45:470
76819915213,114cyclictest22706-21/usr/sbin/munin20:40:040
76819915213,113cyclictest27694-21grep21:06:060
76819915120,30cyclictest12621-21diskstats22:55:370
76819915110,117cyclictest6558-21latency_hist22:20:000
76819915110,116cyclictest14257-21/usr/sbin/munin23:05:360
76819915018,105cyclictest21204-21apt-get20:30:200
76819915017,94cyclictest28364-21/usr/sbin/munin00:30:040
76819915017,25cyclictest25339-21ntp_states00:10:480
76819915016,92cyclictest7844-21ps22:25:530
76819915016,110cyclictest15579-21users23:11:140
76819915010,28cyclictest21512-21cat23:50:030
76819915010,118cyclictest1655-21head21:46:030
7681991499,26cyclictest27033-21uname00:21:140
76819914918,31cyclictest6684-21apt-get22:20:210
76819914915,38cyclictest26266-21apt-get21:00:150
76819914915,113cyclictest16294-21cat23:16:010
76819914914,97cyclictest17818-21memory23:25:490
76819914914,112cyclictest3335-21apt22:00:010
76819914913,24cyclictest9436-21grep22:35:540
76819914910,116cyclictest24054-21sed00:01:090
76819914819,23cyclictest20108-21diskstats23:40:360
76819914811,37cyclictest17481-21awk20:05:520
76819914715,26cyclictest25543-21df20:55:280
76819914713,109cyclictest13571-21memory23:00:450
76819914712,111cyclictest11285-21timerwakeupswit22:46:030
76819914711,114cyclictest30849-21cat21:26:020
76819914621,25cyclictest10066-21irqstats22:40:400
76819914618,24cyclictest3459-21apt-get22:00:200
76819914614,23cyclictest18685-21ntp_states23:30:490
76819914612,109cyclictest15052-21nfs4_client19:50:460
76819914610,110cyclictest19146-21grep20:15:570
76819914515,109cyclictest19614-21apt20:20:120
76819914515,106cyclictest32703-21/usr/sbin/munin21:40:340
76819914419,94cyclictest17989-21apt-get20:10:160
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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