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2025-12-02 - 07:09

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 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 Tue Dec 02, 2025 00:45:10)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
5832224582202,85sleep00-21swapper19:06:450
62459916536,35cyclictest8581-21cron22:40:010
62459916212,107cyclictest23566-21apt-get00:11:350
62459916114,122cyclictest7037-21munin-run19:15:010
62459916017,26cyclictest11401-21apt-get19:42:020
62459916012,124cyclictest7700-21head22:31:030
62459915921,26cyclictest13420-21apt-get19:50:300
62459915919,112cyclictest25642-21apt-get21:05:200
62459915814,24cyclictest21955-21munin-run00:00:010
62459915717,117cyclictest8191-21munin-run19:20:030
62459915714,23cyclictest13245-21munin-run19:50:010
62459915626,108cyclictest0-21swapper22:43:150
62459915619,22cyclictest11401-21apt-get19:40:050
62459915616,117cyclictest3490-21find22:05:550
62459915522,23cyclictest0-21swapper20:55:580
62459915514,42cyclictest2264-21/usr/sbin/munin22:00:110
62459915514,24cyclictest16675-21apt-get23:31:070
62459915513,101cyclictest19772-21wc20:26:030
62459915413,117cyclictest25407-21apt00:20:020
62459915411,115cyclictest20511-21/usr/sbin/munin23:50:280
62459915322,25cyclictest11964-21apt-get23:00:210
62459915322,18cyclictest0-21swapper19:55:500
62459915316,113cyclictest16635-21users23:26:060
62459915314,98cyclictest19493-21apt-get23:45:250
6245991529,100cyclictest16240-21grep20:05:500
62459915238,22cyclictest23413-21kernelversion20:50:420
62459915236,23cyclictest493-21/usr/sbin/munin21:46:090
62459915228,103cyclictest26554-21apt-get00:25:170
62459915216,24cyclictest25407-21apt-get00:21:200
62459915216,113cyclictest18462-21users23:36:140
62459915215,23cyclictest14252-21munin-run23:15:010
62459915215,111cyclictest21627-21/usr/sbin/munin20:40:470
62459915214,24cyclictest27948-21munin-run21:20:020
62459915214,117cyclictest11349-21wc22:55:420
62459915214,112cyclictest28955-21apt-get21:25:200
62459915211,115cyclictest9124-21wc19:25:240
62459915128,22cyclictest0-21swapper21:53:140
62459915121,101cyclictest20010-21apt-get20:30:230
62459915117,28cyclictest15005-21users23:16:060
62459915114,115cyclictest21510-21munin-run20:40:030
62459915111,42cyclictest27236-21kworker/u2:121:30:150
62459915111,117cyclictest15892-21munin-run20:05:010
62459915034,96cyclictest4657-21apt-get22:15:150
62459915021,103cyclictest27345-21/usr/sbin/munin00:31:080
62459915020,25cyclictest6289-21apt-get22:25:190
62459915018,104cyclictest17585-21apt-get20:15:230
62459915015,113cyclictest112-21systemd-journal23:24:360
62459915013,42cyclictest11035-21kworker/u2:222:55:010
62459915012,113cyclictest22075-21apt-get00:00:200
62459914920,28cyclictest10146-21memory19:30:450
62459914918,104cyclictest9551-21apt-get22:45:180
62459914915,112cyclictest31386-21munin-run21:40:020
62459914913,112cyclictest23568-21munin-run00:10:050
62459914912,25cyclictest22644-21latency20:45:430
62459914912,115cyclictest31863-21snmpd00:35:490
62459914833,21cyclictest8776-21mailstats19:20:580
62459914818,104cyclictest31507-21apt-get21:40:200
62459914722,108cyclictest28647-21ls21:21:010
62459914720,100cyclictest3859-21apt-get22:10:210
62459914719,24cyclictest24845-21apt-get21:00:190
62459914714,108cyclictest26611-21irqstats21:10:400
62459914714,107cyclictest12757-21/usr/sbin/munin23:05:580
62459914621,96cyclictest18418-21apt-get20:20:230
62459914611,24cyclictest2231-21wc22:00:060
62459914520,24cyclictest5660-21irqstats22:20:390
62459914514,26cyclictest16900-21/usr/sbin/munin20:10:360
62459914512,104cyclictest18628-21/usr/sbin/munin23:41:000
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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