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2026-04-22 - 21:52

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 100 highest latencies:
System rack5slot7s.osadl.org (updated Wed Apr 22, 2026 12:45:08)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
18677224372199,97sleep00-21swapper07:09:580
187259916014,21cyclictest24945-21apt-get07:50:290
187259915913,103cyclictest29151-21apt-get08:15:150
187259915843,22cyclictest31831-21missed_timers08:30:480
187259915811,121cyclictest4010-21latency_hist12:20:060
187259915713,21cyclictest22798-21awk07:35:470
187259915614,22cyclictest30254-21wc11:40:530
187259915613,117cyclictest16053-21sed10:11:010
187259915613,100cyclictest17827-21/usr/sbin/munin10:25:110
187259915539,22cyclictest9555-21apt-get09:35:130
187259915519,106cyclictest3118-21apt-get08:55:210
187259915519,105cyclictest20363-21diskstats10:40:350
187259915517,23cyclictest19518-21munin-run07:15:030
187259915516,23cyclictest16914-21munin-run10:20:020
187259915515,116cyclictest14381-21sort10:01:080
187259915513,117cyclictest29167-21df11:35:270
187259915512,119cyclictest28563-21grep11:30:480
18725991539,103cyclictest521-21apt-get12:01:360
187259915333,21cyclictest6075-21awk09:11:000
187259915316,93cyclictest12659-21apt-get09:55:480
187259915313,115cyclictest19978-21modprobe07:20:000
187259915312,117cyclictest272-21snmpd10:30:580
187259915219,28cyclictest23570-21diskstats11:00:310
187259915216,111cyclictest21709-21apt-get07:30:190
187259915215,27cyclictest614-21munin-run08:40:030
187259915210,115cyclictest5681-21/usr/sbin/munin12:30:420
18725991519,29cyclictest22527-21modprobe10:55:000
187259915135,24cyclictest24315-21cpuspeed11:05:220
187259915119,109cyclictest20129-21munin-run10:40:020
187259915119,107cyclictest6479-21apt-get12:35:190
187259915112,115cyclictest28214-21cat11:30:030
187259915111,26cyclictest2689-21grep08:50:540
187259915110,24cyclictest21340-21sendmail_mailqu07:25:560
187259915022,26cyclictest17147-21diskstats10:20:330
187259915017,25cyclictest21285-21memory10:45:440
187259915016,22cyclictest29982-21apt-get08:20:190
187259915015,20cyclictest526-21munin-run12:00:060
187259915014,113cyclictest24820-21munin-run07:50:020
187259915013,23cyclictest23338-21munin-run11:00:040
187259915012,117cyclictest27929-21ps08:05:540
187259915012,117cyclictest25945-21apt-get07:55:130
187259915011,98cyclictest31469-21cron08:30:020
18725991499,115cyclictest4359-21grep12:20:440
187259914934,20cyclictest9455-21munin-run09:35:020
187259914913,22cyclictest31561-21wc11:50:220
187259914911,99cyclictest2142-21sed08:46:010
18725991489,118cyclictest26443-21sort11:16:010
187259914817,23cyclictest27006-21memory08:00:430
187259914815,37cyclictest0-21swapper10:05:230
187259914815,109cyclictest2236-21sort12:06:060
187259914736,91cyclictest26677-21/usr/sbin/munin11:21:090
187259914717,108cyclictest31338-21users11:46:070
187259914716,22cyclictest4484-21awk09:00:590
187259914714,25cyclictest4852-21/usr/sbin/munin09:05:320
187259914714,114cyclictest7045-21munin-run09:20:020
187259914714,110cyclictest20813-21apt07:25:010
187259914714,107cyclictest4998-21df_inode12:25:290
187259914713,96cyclictest12784-21systemd-journal09:45:010
18725991469,24cyclictest7532-21wc09:20:540
187259914616,24cyclictest12068-21df09:50:260
187259914613,111cyclictest25047-21apt-get11:10:130
187259914613,106cyclictest11168-21/usr/sbin/munin09:45:390
18725991458,114cyclictest29118-21sort08:15:040
187259914516,103cyclictest23323-21/usr/sbin/munin07:40:340
187259914415,26cyclictest2566-21df12:10:240
187259914317,25cyclictest977-21memory08:40:460
187259914314,107cyclictest8074-21diskstats09:25:310
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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