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2026-05-21 - 09:21

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 Thu May 21, 2026 00:45:09)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
12493224312177,98sleep00-21swapper19:07:370
12806991608,127cyclictest14834-21sed19:21:040
128069916016,117cyclictest1950-21munin-run00:40:020
128069915715,114cyclictest19394-21apt-get23:10:170
128069915712,121cyclictest18497-21munin-plugin-st23:05:010
128069915712,107cyclictest30963-21apt-get00:20:340
128069915710,123cyclictest18031-21head19:41:040
128069915616,25cyclictest13612-21munin-node19:15:070
128069915614,24cyclictest30963-21apt-get00:20:020
128069915613,118cyclictest31041-21sort21:01:010
128069915533,100cyclictest6502-21uname21:50:390
128069915513,39cyclictest6062-21awk21:46:080
128069915513,120cyclictest26510-21apt-get23:56:350
128069915510,122cyclictest26506-21modprobe23:55:000
128069915431,16cyclictest0-21swapper19:36:080
128069915415,116cyclictest22149-21/usr/sbin/munin20:10:050
128069915412,23cyclictest24109-21munin-run23:40:020
128069915411,106cyclictest19282-21tr19:50:460
128069915326,106cyclictest1294-21apt-get21:20:130
128069915324,19cyclictest0-21swapper20:55:010
128069915316,113cyclictest7411-21df21:55:420
128069915313,98cyclictest4374-21apt-get21:41:170
128069915313,101cyclictest26493-21/usr/sbin/munin20:35:340
128069915227,103cyclictest23281-21apt-get20:15:190
128069915217,24cyclictest22621-21irqstats20:11:090
128069915217,109cyclictest18858-21users19:46:050
128069915216,39cyclictest13612-21munin-node19:15:090
128069915214,113cyclictest30405-21munin-run21:00:040
128069915212,41cyclictest15192-21ls22:41:020
128069915120,106cyclictest27543-21apt-get00:01:110
128069915119,104cyclictest25025-21apt-get23:45:160
128069915116,112cyclictest8859-21munin-run22:05:010
128069915114,113cyclictest27429-21diskstats20:40:320
128069915113,38cyclictest22590-21cat23:30:050
128069915111,25cyclictest21612-21timerwakeupswit23:21:000
128069915111,118cyclictest32291-21irqstats21:10:390
128069915111,114cyclictest16485-21grep22:50:470
128069915030,96cyclictest4364-21modprobe21:40:010
128069915019,103cyclictest2089-21apt-get21:25:190
128069915016,96cyclictest20494-21munin-run20:00:030
128069915016,109cyclictest10410-21users22:11:040
128069914937,93cyclictest12975-21/usr/sbin/munin22:31:100
128069914926,100cyclictest32116-21apt-get00:25:150
128069914918,26cyclictest25223-21ntp_states20:25:510
128069914914,92cyclictest24922-21apt23:45:010
128069914914,36cyclictest30119-21users00:11:040
128069914911,25cyclictest9551-21grep22:06:020
128069914910,118cyclictest19283-21kworker/u2:523:10:010
128069914828,22cyclictest0-21swapper20:20:300
128069914828,16cyclictest0-21swapper21:15:470
128069914811,24cyclictest20042-21snmpd00:05:580
128069914811,115cyclictest26475-21grep20:35:050
128069914721,100cyclictest20429-21memory23:15:450
128069914713,112cyclictest12075-21latency_hist22:25:010
128069914711,94cyclictest14395-21unixbench_singl22:36:030
128069914633,89cyclictest3142-21missed_timers21:30:440
128069914617,26cyclictest17221-21memory22:55:430
128069914614,111cyclictest10866-21ntp_states22:15:500
128069914612,26cyclictest21162-21wc20:01:010
128069914518,24cyclictest22722-21diskstats23:30:320
128069914515,26cyclictest28209-21df20:45:240
128069914515,106cyclictest450-21apt-get00:30:160
128069914514,29cyclictest15795-21sshd19:30:160
128069914510,112cyclictest12428-21sort22:25:450
128069914434,90cyclictest15774-21processes22:45:540
128069914328,20cyclictest0-21swapper21:05:500
128069914318,99cyclictest15107-21diskstats19:25:310
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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