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2026-05-22 - 10:10

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 Fri May 22, 2026 00:45:09)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
21578224372205,87sleep00-21swapper19:09:250
216899916012,121cyclictest11795-21/usr/sbin/munin21:25:430
216899915814,119cyclictest12650-21apt-get21:30:240
216899915814,116cyclictest30982-21/usr/sbin/munin23:20:520
216899915813,106cyclictest25076-21apt-get22:45:110
216899915729,22cyclictest0-21swapper00:00:100
216899915716,95cyclictest10010-21apt-get21:15:250
216899915716,117cyclictest24160-21munin-run22:40:020
216899915716,117cyclictest11694-21munin-run21:25:020
21689991569,124cyclictest15298-21users21:41:110
216899915514,116cyclictest9043-21munin-run21:10:010
216899915513,121cyclictest4008-21modprobe23:55:010
216899915512,25cyclictest20702-21kworker/u2:619:11:560
216899915413,24cyclictest2037-21awk23:40:490
216899915412,26cyclictest19327-21modprobe22:10:000
216899915329,21cyclictest1349-21awk23:35:570
216899915317,24cyclictest25967-21df22:50:240
216899915315,25cyclictest4818-21munin-run00:00:020
216899915312,35cyclictest13690-21apt-get21:35:260
216899915311,117cyclictest30857-21latency_hist23:20:020
216899915311,101cyclictest4856-21grep20:40:580
216899915310,102cyclictest26765-21/usr/sbin/munin19:35:550
216899915222,16cyclictest0-21swapper00:35:560
216899915220,106cyclictest6735-21apt-get20:55:180
216899915217,110cyclictest32572-21/usr/sbin/munin23:30:550
216899915217,108cyclictest15675-21memory21:45:440
216899915215,23cyclictest9651-21apt00:30:000
216899915214,115cyclictest28436-21awk23:01:080
216899915214,115cyclictest20133-21munin-run22:15:010
216899915212,118cyclictest28759-21/usr/sbin/munin19:50:580
216899915212,116cyclictest27646-21munin-run23:00:020
21689991519,27cyclictest32589-21grep20:11:020
216899915121,28cyclictest24524-21memory22:40:440
216899915115,109cyclictest16230-21apt-get21:50:120
216899915111,27cyclictest26017-21mailstats19:30:570
216899915111,117cyclictest9212-21wc21:10:240
216899915110,119cyclictest20042-21snmpd20:37:110
216899915019,105cyclictest24207-21memory19:20:510
216899915015,25cyclictest22661-21apt-get22:30:130
216899915015,23cyclictest17268-21memory21:55:440
216899915013,115cyclictest22236-21wc22:25:550
216899914918,25cyclictest20346-21diskstats22:15:340
216899914913,24cyclictest25200-21systemctl19:25:560
216899914912,112cyclictest20042-21snmpd00:30:190
216899914911,116cyclictest18517-21vmstat22:01:070
216899914874,50cyclictest5392-21wc20:45:450
216899914817,107cyclictest28280-21grep19:45:490
216899914816,27cyclictest29557-21/usr/sbin/munin19:55:490
216899914813,26cyclictest7329-21apt-get00:15:130
216899914813,24cyclictest27414-21memory19:40:440
21689991479,115cyclictest31353-21uname20:05:400
216899914715,23cyclictest6054-21ntp_states00:05:510
216899914712,24cyclictest2729-21/usr/sbin/munin20:30:390
216899914621,26cyclictest29596-21memory23:10:440
216899914620,27cyclictest1140-21apt-get20:20:200
216899914620,24cyclictest1043-21modprobe20:20:020
216899914618,103cyclictest2528-21apt-get23:45:170
216899914618,103cyclictest23375-21memory19:16:110
216899914613,23cyclictest28561-21apt-get23:05:190
216899914613,22cyclictest6532-21apt-get00:10:110
216899914612,19cyclictest8531-21grep00:20:550
216899914612,111cyclictest5939-21apt-get20:50:110
216899914517,25cyclictest1936-21apt-get20:25:160
216899914516,27cyclictest31877-21df23:25:270
216899914513,24cyclictest30494-21/usr/sbin/munin20:00:310
216899914417,24cyclictest7730-21irqstats21:00:410
216899914313,103cyclictest21067-21apt-get22:20:160
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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