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2026-05-23 - 11:33

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 Sat May 23, 2026 00:45:08)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2593224282193,90sleep00-21swapper19:06:200
30459916215,122cyclictest18376-21apt-get23:52:010
30459916210,127cyclictest12784-21systemd-journal20:37:590
30459916120,27cyclictest21430-21apt-get20:55:180
30459916014,122cyclictest13121-21mailstats23:20:580
30459915915,119cyclictest9068-21cut22:55:560
30459915816,26cyclictest20742-21/usr/sbin/munin00:05:290
30459915815,26cyclictest26472-21latency_hist00:40:080
30459915813,123cyclictest22227-21apt-get00:16:250
30459915736,101cyclictest9741-21grep19:46:020
30459915715,102cyclictest14618-21apt-get20:21:050
30459915713,121cyclictest4988-21munin-run19:20:010
30459915639,24cyclictest19217-21/usr/sbin/munin20:40:400
30459915619,25cyclictest30502-21apt-get21:50:170
30459915616,27cyclictest6225-21/usr/sbin/munin22:40:250
30459915615,22cyclictest11399-21apt20:00:020
30459915613,121cyclictest7678-21users22:46:050
3045991559,120cyclictest7859-21grep19:35:520
30459915541,92cyclictest3250-21df_inode19:10:300
30459915515,22cyclictest10346-21awk19:50:560
30459915515,20cyclictest18612-21apt-get23:55:540
30459915514,21cyclictest19763-21apt-get00:00:160
30459915419,112cyclictest27434-21irqstats21:31:090
30459915415,39cyclictest25343-21apt21:20:020
30459915414,22cyclictest24084-21latency_hist00:25:010
30459915412,25cyclictest19836-21/usr/sbin/munin20:45:350
30459915411,118cyclictest22298-21dpkg00:15:080
30459915410,120cyclictest25719-21cat00:35:030
30459915316,113cyclictest29593-21modprobe21:45:010
30459915314,116cyclictest22953-21cat21:05:030
30459915313,116cyclictest1555-21awk22:10:480
30459915312,116cyclictest13857-21cat20:15:050
30459915218,106cyclictest32119-21apt-get22:00:170
30459915217,26cyclictest24189-21apt-get00:25:160
30459915217,109cyclictest13915-21apt-get20:15:170
30459915214,23cyclictest9011-21munin-run19:45:010
30459915212,117cyclictest11764-21cat23:15:040
30459915210,40cyclictest7993-21uname22:50:400
30459915210,117cyclictest16095-21apt-get23:40:140
30459915117,108cyclictest2048-21apt-get22:15:170
30459915114,113cyclictest25770-21grep21:20:490
30459915014,25cyclictest28789-21systemctl21:40:010
30459915014,25cyclictest15338-21df23:35:370
30459915013,43cyclictest10884-21users23:06:050
30459915012,39cyclictest12973-21sed20:06:040
30459915011,99cyclictest14237-21kworker/u2:523:30:050
30459915010,116cyclictest17152-21missed_timers23:45:450
30459914918,26cyclictest6698-21apt-get19:30:180
30459914917,25cyclictest11819-21/usr/sbin/munin23:15:530
30459914916,25cyclictest3770-21apt-get22:25:160
30459914913,114cyclictest20744-21diskstats20:50:390
3045991489,116cyclictest9642-21grep23:00:400
3045991489,115cyclictest26512-21grep21:25:440
30459914821,100cyclictest3084-21diskstats22:20:340
30459914817,108cyclictest31997-21munin-run22:00:030
30459914810,117cyclictest6332-21find19:25:560
3045991479,114cyclictest16862-21ntpq20:30:480
30459914721,98cyclictest13451-21apt-get23:25:190
30459914717,26cyclictest29701-21/usr/sbin/munin21:45:380
30459914716,44cyclictest23943-21df21:10:250
30459914715,24cyclictest23155-21diskstats21:05:310
30459914714,25cyclictest563-21df_inode22:05:300
30459914712,112cyclictest4596-21apt-get22:30:210
30459914710,116cyclictest11523-21/usr/sbin/munin20:00:320
30459914672,32cyclictest5754-21grep19:21:040
30459914615,24cyclictest5503-21df22:35:240
30459914612,26cyclictest3948-21munin-node20:25:120
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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