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2026-03-15 - 16:38

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 Sun Mar 15, 2026 12:45:10)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
22544224232183,96sleep00-21swapper07:09:560
225969916319,119cyclictest6589-21apt-get12:11:040
225969916017,118cyclictest5719-21munin-run08:45:030
225969915844,91cyclictest3354-21latency_hist08:30:040
225969915816,25cyclictest1774-21munin-run11:40:020
225969915814,38cyclictest5717-21apt-get08:46:040
225969915812,119cyclictest25983-21apt-get10:50:370
225969915722,28cyclictest23933-21diskstats07:15:480
225969915720,28cyclictest28889-21memory07:45:430
225969915717,94cyclictest1817-21apt-get08:20:170
225969915619,110cyclictest22989-21diskstats10:30:310
225969915617,114cyclictest27929-21/usr/sbin/munin11:00:410
225969915612,121cyclictest6382-21cut12:05:570
225969915515,24cyclictest21093-21grep10:16:040
225969915513,120cyclictest25040-21grep10:41:000
225969915435,19cyclictest16880-21find09:50:540
225969915419,31cyclictest15772-21diskstats09:45:310
225969915416,114cyclictest30941-21munin-run08:00:030
225969915415,108cyclictest4274-21/usr/sbin/munin11:55:590
225969915412,24cyclictest12340-21sshd09:22:540
225969915411,24cyclictest28721-21/usr/sbin/munin11:05:530
225969915338,21cyclictest25718-21sendmail_mailqu10:45:560
225969915312,115cyclictest27653-21grep07:36:030
225969915212,27cyclictest111-21systemd-journal09:55:550
225969915212,26cyclictest18865-21/usr/sbin/munin10:05:460
225969915137,93cyclictest11454-21switchtime12:35:580
225969915119,28cyclictest25449-21apt-get07:25:160
225969915119,102cyclictest29446-21apt-get07:50:200
225969915117,29cyclictest8033-21ntpq12:15:590
225969915117,107cyclictest24656-21apt-get07:20:160
225969915116,111cyclictest21289-21apt-get10:20:120
225969915115,22cyclictest1697-21munin-run08:20:020
225969915114,25cyclictest3845-21wc11:50:530
225969915113,115cyclictest13152-21apt09:30:010
225969915032,21cyclictest11549-21munin-run09:20:020
225969915018,105cyclictest13254-21apt-get09:30:200
225969915011,115cyclictest4376-21uname08:35:390
225969915010,117cyclictest30275-21cat11:15:040
225969914923,96cyclictest27858-21apt-get07:40:200
225969914918,27cyclictest23385-21/usr/sbin/munin07:15:030
225969914911,26cyclictest30734-21/usr/sbin/munin11:15:550
225969914820,97cyclictest6495-21kworker/u2:1608:50:150
225969914816,24cyclictest2065-21irqstats11:40:380
225969914816,106cyclictest14157-21diskstats09:35:310
225969914814,27cyclictest5342-21/usr/sbin/munin12:00:430
225969914813,111cyclictest31850-21/usr/sbin/munin08:05:440
225969914812,23cyclictest752-21sort08:11:010
225969914812,112cyclictest9989-21grep09:10:040
22596991479,117cyclictest8326-21kworker/u2:1209:00:000
22596991479,117cyclictest32230-21grep11:25:490
22596991478,117cyclictest111-21systemd-journal12:35:000
225969914728,22cyclictest4092-21modprobe08:35:000
225969914718,25cyclictest8547-21apt-get12:20:170
225969914715,108cyclictest8457-21apt-get09:00:170
225969914711,26cyclictest19968-21grep10:10:480
225969914710,110cyclictest24085-21ps10:35:560
225969914619,27cyclictest18074-21apt-get10:00:200
225969914619,24cyclictest31169-21diskstats08:00:340
225969914616,23cyclictest14970-21df09:40:250
225969914616,22cyclictest933-21users11:31:060
225969914614,50cyclictest27108-21/usr/sbin/munin10:55:430
225969914614,25cyclictest10283-21memory09:10:410
225969914516,89cyclictest31247-21df11:20:240
225969914515,107cyclictest22084-21apt-get10:25:130
225969914434,91cyclictest3223-21threads11:45:570
225969914410,111cyclictest9795-21cut12:25:590
225969914410,109cyclictest27021-21ls07:35:060
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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