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2026-08-23 - 19:36

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 Sun Aug 23, 2026 12:45:09)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
21410224572204,95sleep00-21swapper07:08:010
216769916113,125cyclictest13127-21sort09:31:010
216769916043,21cyclictest15683-21mailstats09:46:060
216769915917,103cyclictest22466-21munin-run07:15:020
216769915916,119cyclictest5660-21munin-run12:05:010
216769915915,37cyclictest25066-21/usr/sbin/munin10:45:310
216769915833,22cyclictest4440-21latency_hist08:40:020
216769915718,31cyclictest7661-21ntpq12:15:510
216769915714,25cyclictest30952-21sort11:20:050
21676991569,105cyclictest31648-21sed11:21:090
216769915622,104cyclictest25331-21apt-get07:30:230
216769915618,25cyclictest29890-1kworker/u3:508:02:080
216769915615,117cyclictest30269-21munin-run08:00:030
216769915613,35cyclictest14071-21apt-get09:41:030
216769915613,120cyclictest17108-21awk09:55:480
216769915515,28cyclictest29204-21df_inode11:10:290
216769915511,114cyclictest5758-21/usr/sbin/munin12:06:040
216769915431,18cyclictest0-21swapper10:25:360
216769915414,118cyclictest1626-21apt11:40:020
216769915411,119cyclictest23135-21modprobe10:35:010
21676991539,120cyclictest5938-21sort08:46:020
216769915320,107cyclictest27745-21apt-get07:45:190
216769915319,30cyclictest7767-21/usr/sbin/munin09:01:110
216769915319,27cyclictest11785-21apt-get09:25:160
216769915221,29cyclictest6265-21diskstats08:50:340
216769915219,30cyclictest21091-21memory10:20:440
216769915216,107cyclictest32695-21df_inode11:30:290
216769915213,115cyclictest26155-21wc10:50:540
216769915210,117cyclictest3654-21sort08:35:030
216769915117,111cyclictest11271-21munin-run12:40:020
216769915115,110cyclictest32463-21/usr/sbin/munin08:10:470
216769915115,108cyclictest27797-21ntpq11:00:480
216769915112,26cyclictest19865-21unixbench_singl10:11:030
216769915019,22cyclictest0-21swapper11:05:240
216769915019,105cyclictest31799-21apt-get11:25:190
216769915016,23cyclictest16672-21users09:51:040
216769915014,39cyclictest11763-21cat09:25:050
216769914921,100cyclictest3458-21diskstats11:50:330
216769914919,23cyclictest10014-21users09:11:060
216769914916,23cyclictest26719-21sort07:36:030
216769914916,106cyclictest1858-21df_inode11:40:300
216769914915,26cyclictest20023-21apt-get10:15:210
216769914914,113cyclictest22593-21if_eth007:15:140
216769914912,37cyclictest12784-21systemd-journal08:30:010
216769914912,24cyclictest13938-21sort09:36:020
216769914911,99cyclictest5209-21grep08:41:030
216769914911,26cyclictest18891-21cut10:05:570
216769914910,25cyclictest24774-21ls10:45:050
216769914910,110cyclictest8977-21/usr/sbin/munin12:25:230
216769914818,104cyclictest24647-21diskstats07:25:340
216769914817,105cyclictest4142-21apt-get11:55:160
216769914815,25cyclictest1357-21apt-get08:20:150
216769914814,108cyclictest8563-21/usr/sbin/munin09:05:570
216769914811,36cyclictest10393-21grep12:31:050
216769914811,114cyclictest8651-21mailstats12:20:580
21676991479,117cyclictest23989-21sort07:20:470
216769914718,28cyclictest2792-21memory11:45:450
216769914717,106cyclictest27387-21munin-run11:00:020
216769914714,24cyclictest779-21/usr/sbin/munin08:15:470
216769914713,111cyclictest29267-21wc07:55:060
216769914638,86cyclictest18156-21switchtime10:01:000
216769914615,108cyclictest10260-21df_inode09:15:300
216769914611,92cyclictest31636-21grep08:05:540
216769914529,18cyclictest0-21swapper12:11:050
216769914515,108cyclictest23945-21munin-run10:40:030
21676991447,114cyclictest27566-21grep07:41:010
216769914212,105cyclictest7265-21ntp_states08:55:520
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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