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2026-03-21 - 14:05

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 highest latencies:
System rack5slot7s.osadl.org (updated Sat Mar 21, 2026 00:45:09)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
32528224172188,89sleep00-21swapper19:06:490
4709917239,23cyclictest12264-21cron20:20:010
4709916540,23cyclictest24582-21sshd21:32:430
4709916210,126cyclictest6605-21apt-get23:06:490
4709916015,117cyclictest16572-21apt-get00:05:180
4709915919,116cyclictest20480-21apt-get00:30:370
470991588,126cyclictest15203-21zcat20:35:570
4709915816,99cyclictest21351-21df21:15:270
4709915813,116cyclictest28729-21/usr/sbin/munin22:00:120
4709915713,120cyclictest6402-21cut23:00:570
4709915713,119cyclictest30960-21sed22:11:040
4709915712,30cyclictest5653-21/usr/sbin/munin19:36:060
4709915711,27cyclictest19164-21/usr/sbin/munin00:20:360
4709915710,31cyclictest4763-21sshd19:31:450
4709915615,99cyclictest5190-21df22:55:270
4709915543,93cyclictest11452-21sshd20:13:270
4709915518,42cyclictest22879-21apt-get21:25:160
4709915511,26cyclictest17989-21grep00:11:010
4709915510,28cyclictest15683-21ls20:40:240
4709915421,103cyclictest1698-21apt-get19:15:380
4709915416,21cyclictest1980-21df22:35:260
4709915414,115cyclictest8358-21apt-get19:55:180
4709915413,100cyclictest9124-21sort23:16:040
4709915412,120cyclictest27216-21df21:50:280
4709915412,117cyclictest29829-21awk22:05:500
4709915412,116cyclictest3554-21latency19:25:410
4709915411,116cyclictest111-21systemd-journal21:45:270
470991539,120cyclictest22823-21cat21:25:050
4709915317,105cyclictest13992-21apt-get20:30:200
4709915313,26cyclictest8200-21grep19:51:050
4709915311,120cyclictest18863-21modprobe00:20:010
4709915217,22cyclictest11845-21df23:35:270
4709915215,24cyclictest14259-21df23:50:260
4709915123,106cyclictest0-21swapper21:00:030
4709915117,24cyclictest6864-21df19:45:250
4709915116,108cyclictest10952-21apt-get23:30:130
4709915115,25cyclictest13825-21mailstats23:45:570
4709915114,115cyclictest7737-21apt-get23:10:140
4709915114,114cyclictest2806-21df_inode22:40:270
4709915015,112cyclictest12502-21df20:20:260
4709915011,115cyclictest25061-21ps21:36:020
4709915010,25cyclictest17810-21grep20:51:020
4709915010,115cyclictest10665-21switchtime23:25:590
470991499,23cyclictest9600-21grep20:00:550
4709914917,103cyclictest13308-21diskstats20:25:350
4709914915,96cyclictest31180-21wc22:15:220
4709914914,36cyclictest1188-21df_inode22:30:260
4709914913,24cyclictest19895-21diskstats00:25:290
4709914913,113cyclictest10087-21df_inode20:05:310
4709914912,115cyclictest1301-21latency_hist19:15:070
4709914910,23cyclictest15550-21sort23:56:020
4709914831,22cyclictest4360-21cstates22:50:230
4709914812,24cyclictest25950-21grep21:40:550
4709914733,21cyclictest20317-21users21:06:060
4709914726,20cyclictest10050-21modprobe23:25:000
4709914714,110cyclictest2530-21/usr/sbin/munin19:20:350
4709914710,25cyclictest27906-21/usr/sbin/munin21:56:080
4709914710,114cyclictest4028-21sort22:45:590
4709914710,114cyclictest21608-21/usr/sbin/munin00:35:530
4709914629,21cyclictest0-21swapper23:41:030
4709914617,26cyclictest18821-21apt-get21:00:210
4709914615,29cyclictest16400-21/usr/sbin/munin20:45:420
4709914610,38cyclictest20819-21ps21:10:530
4709914516,23cyclictest392-21df_inode22:25:300
4709914514,24cyclictest16241-21sendmail_mailtr00:00:570
4709914318,24cyclictest6629-21users19:41:060
4709914310,114cyclictest32120-21irqstats22:20:370
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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