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2026-08-23 - 14:10

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 Sun Aug 23, 2026 00:45:09)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
32685224212192,87sleep00-21swapper19:08:070
4869916314,125cyclictest12156-21grep20:20:540
4869916312,124cyclictest18330-21apt-get00:16:570
4869916010,127cyclictest1284-21apt-get19:15:030
4869915916,25cyclictest11615-21apt20:20:020
4869915818,23cyclictest20874-21df21:15:260
4869915811,124cyclictest5104-21grep19:36:070
4869915811,121cyclictest17122-21ntpq00:06:310
4869915715,26cyclictest10422-21apt-get23:31:310
4869915713,103cyclictest5312-21munin-node19:40:110
4869915613,120cyclictest26051-21awk21:45:560
4869915613,119cyclictest7500-21sort19:51:020
4869915533,23cyclictest29123-21tr22:05:490
4869915516,26cyclictest21391-21apt-get00:31:120
4869915514,116cyclictest7207-21munin-run23:10:010
4869915419,24cyclictest20394-21apt-get00:26:100
4869915416,111cyclictest14197-21apt-get23:50:260
4869915415,29cyclictest14060-21users23:47:080
4869915414,115cyclictest22389-21apt-get00:35:570
4869915413,116cyclictest16965-21fgrep20:50:540
4869915412,24cyclictest31892-21ps22:21:560
486991538,120cyclictest10188-21expr20:10:230
4869915334,22cyclictest15403-21grep23:55:520
4869915318,98cyclictest10422-21apt-get23:30:050
4869915316,113cyclictest19561-21apt-get00:20:340
4869915315,37cyclictest23310-21diskstats21:30:330
4869915314,116cyclictest682-21apt-get22:30:300
4869915311,40cyclictest20407-21find21:10:580
4869915311,24cyclictest1431-21cat19:15:170
486991529,102cyclictest13060-21modprobe23:45:000
4869915220,27cyclictest14127-21apt-get20:35:220
4869915216,21cyclictest6208-21df19:45:260
4869915215,112cyclictest30306-21modprobe22:15:010
4869915129,20cyclictest8528-21wc23:15:540
4869915123,19cyclictest0-21swapper22:00:000
4869915116,34cyclictest18040-21/usr/sbin/munin21:00:070
4869915112,37cyclictest4457-21/usr/sbin/munin22:50:570
4869915017,109cyclictest3949-21apt22:50:010
4869915015,21cyclictest21847-21memory21:20:460
4869915014,27cyclictest22401-21/usr/sbin/munin21:25:400
4869915013,24cyclictest2343-21munin-run22:40:020
4869915011,116cyclictest5391-21wc22:56:010
4869915010,96cyclictest4390-21latency_hist19:35:010
4869914912,117cyclictest18323-21kworker/u2:000:15:000
4869914911,115cyclictest13071-1kworker/u3:000:00:140
4869914820,27cyclictest26510-21df21:50:260
4869914819,105cyclictest18457-21df21:00:400
4869914813,114cyclictest9683-21grep20:05:550
4869914813,113cyclictest19868-21cron21:10:000
4869914813,110cyclictest32338-21cstates22:25:310
4869914812,24cyclictest24884-21cat21:40:210
4869914812,110cyclictest2907-21/usr/sbin/munin19:25:220
486991477,99cyclictest12273-21sendmail-msp23:40:020
4869914736,20cyclictest9298-21grep20:05:050
4869914720,21cyclictest0-21swapper23:20:360
4869914715,107cyclictest13457-21/usr/sbin/munin20:30:350
4869914713,110cyclictest16882-21snmpd22:17:550
4869914711,114cyclictest7950-21sort19:55:440
4869914616,23cyclictest15916-21irqstats20:45:420
4869914611,97cyclictest7744-21mailstats23:10:560
4869914516,23cyclictest12644-21diskstats20:25:320
4869914513,23cyclictest14947-21/usr/sbin/munin20:40:140
4869914512,112cyclictest1473-1kworker/u3:119:20:170
4869914511,26cyclictest28546-21/usr/sbin/munin22:01:000
4869914511,109cyclictest5843-21/usr/sbin/munin23:00:400
4869914413,26cyclictest2793-21/usr/sbin/munin22:40:550
4869914217,20cyclictest23996-21apt-get21:35:150
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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