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2026-03-24 - 02:01

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 Mon Mar 23, 2026 12:45:08)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
25004224412205,90sleep00-21swapper07:10:000
250499916317,103cyclictest32067-21df_inode07:50:280
250499916118,120cyclictest20946-21munin-run10:00:060
250499916019,113cyclictest29553-21apt-get07:35:210
250499915920,110cyclictest10168-21apt-get08:55:210
250499915917,118cyclictest24779-21apt-get10:20:140
250499915913,103cyclictest5833-21apt-get08:31:420
250499915912,123cyclictest19072-21apt-get09:50:280
250499915818,101cyclictest15116-21diskstats09:25:320
250499915814,120cyclictest7887-21df_inode08:40:280
250499915812,121cyclictest2697-21cat08:10:050
250499915717,26cyclictest1002-21apt08:00:020
250499915716,117cyclictest27198-21modprobe10:35:000
250499915617,23cyclictest28089-21irqstats07:25:400
250499915615,117cyclictest23547-21apt-get10:16:250
250499915615,116cyclictest28953-21apt-get10:45:290
250499915611,119cyclictest21160-21sshd10:00:280
250499915512,118cyclictest30178-21grep10:50:480
250499915511,119cyclictest5943-21apt-config08:30:090
250499915444,90cyclictest14371-21if_eth009:20:360
250499915425,109cyclictest11449-21cat12:15:500
250499915421,37cyclictest7660-21apt08:40:010
250499915421,26cyclictest10340-21apt-get12:10:160
250499915418,113cyclictest610-21munin-run11:10:020
250499915416,115cyclictest18905-21munin-run09:50:030
250499915415,116cyclictest6001-21cut11:40:570
250499915415,114cyclictest13460-21munin-run12:30:020
250499915414,118cyclictest9473-21df08:50:290
250499915413,118cyclictest1140-21wc11:10:550
250499915413,117cyclictest14093-21modprobe09:20:020
250499915316,114cyclictest30852-21df_inode10:55:280
250499915312,101cyclictest12396-21grep12:20:540
250499915217,108cyclictest3133-21apt-get11:25:180
250499915216,39cyclictest23509-21users10:11:040
250499915215,114cyclictest26390-21df_inode07:15:460
250499915214,25cyclictest25856-21systemd-cgroups07:15:030
250499915212,24cyclictest27991-21cron10:40:000
250499915210,119cyclictest31689-21switchtime07:46:010
250499915118,24cyclictest8852-21df12:00:270
250499915116,111cyclictest15897-21df09:30:240
250499915116,108cyclictest22063-21apt-get10:05:270
250499915114,115cyclictest13557-21/usr/sbin/munin12:30:470
250499915113,113cyclictest2823-21df_inode08:10:280
250499915020,26cyclictest3927-21apt-get11:30:160
250499915019,29cyclictest1504-21apt-get11:15:200
250499915016,109cyclictest7135-21apt-get11:50:200
250499915012,25cyclictest30902-21grep07:41:010
25049991499,117cyclictest4343-21/usr/sbin/munin08:21:000
250499914936,92cyclictest27727-21/usr/sbin/munin07:21:020
250499914920,27cyclictest1300-21irqstats08:00:410
250499914915,37cyclictest0-21swapper09:10:220
250499914911,22cyclictest8178-21wc11:55:440
250499914910,38cyclictest28495-21grep10:40:540
25049991489,115cyclictest26342-21head10:26:110
250499914814,26cyclictest9546-21apt-get12:05:110
250499914814,26cyclictest31569-21/usr/sbin/munin11:00:280
250499914812,22cyclictest11243-21sort09:00:460
250499914811,25cyclictest6336-21/usr/sbin/munin11:45:350
250499914729,21cyclictest4226-21munin-run08:20:020
250499914726,98cyclictest28862-21df_inode07:30:280
250499914716,25cyclictest11959-21irqstats09:05:400
250499914714,111cyclictest14985-21grep12:36:030
250499914712,110cyclictest2590-21missed_timers11:20:450
250499914710,19cyclictest8576-21/usr/sbin/munin08:45:560
250499914611,110cyclictest5267-21grep11:36:010
250499914518,26cyclictest17514-21df09:40:250
250499914415,105cyclictest16904-21ntpq09:35:490
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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