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2026-05-04 - 05:28

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 50 highest latencies:
System rack5slot7s.osadl.org (updated Mon May 04, 2026 00:45:11)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3454224262191,90sleep00-21swapper19:06:530
38509916217,25cyclictest8647-21/usr/sbin/munin22:56:100
38509916112,122cyclictest22793-21apt-get00:20:220
38509916018,118cyclictest15178-21df23:35:270
38509915916,119cyclictest272-21snmpd00:05:080
38509915915,120cyclictest18990-21apt20:40:110
38509915816,99cyclictest20346-21memory00:06:200
38509915816,119cyclictest20682-21df20:50:250
38509915815,116cyclictest6506-21wc19:21:010
38509915714,26cyclictest27627-21awk21:31:410
38509915713,27cyclictest24628-21cat00:30:450
38509915618,96cyclictest728-21df22:05:340
38509915615,116cyclictest10840-21cron19:50:020
38509915517,24cyclictest4119-21irqstats19:10:380
38509915512,117cyclictest12976-21awk23:20:460
38509915511,40cyclictest19786-21munin-node20:45:120
38509915438,96cyclictest16333-21/usr/sbin/munin23:40:560
38509915414,24cyclictest9698-21ls23:00:410
38509915412,116cyclictest17306-21grep23:46:010
38509915317,20cyclictest31936-21apt-get22:01:060
38509915313,100cyclictest20042-21snmpd00:16:240
38509915312,24cyclictest17488-21/usr/sbin/munin23:50:210
38509915312,117cyclictest7735-21sshd22:47:100
38509915311,118cyclictest23693-21modprobe21:10:000
38509915231,20cyclictest31938-21munin-plugin-st22:00:020
38509915221,26cyclictest15780-21apt-get20:20:170
38509915217,25cyclictest30619-21irqstats21:50:400
38509915217,22cyclictest26909-21munin-run21:30:020
38509915217,22cyclictest12569-21munin-run23:20:030
38509915213,113cyclictest28398-21grep21:36:030
38509915211,42cyclictest23633-21/usr/sbin/munin00:25:200
3850991518,122cyclictest21628-21munin-run00:15:050
38509915129,39cyclictest0-21swapper19:27:060
38509915122,100cyclictest25176-21apt-get00:35:220
38509915120,26cyclictest6920-21users22:41:110
38509915119,23cyclictest5337-21apt22:35:010
38509915119,20cyclictest0-21swapper19:17:480
38509915113,25cyclictest8995-21/usr/sbin/munin19:35:590
38509915019,27cyclictest16575-21apt-get20:25:190
38509915019,101cyclictest2217-21apt-get22:15:200
38509915016,24cyclictest25294-21apt21:20:030
38509915014,113cyclictest14845-21munin-plugin-st20:15:010
38509915011,114cyclictest7954-21sendmail-mta22:50:250
38509914919,39cyclictest7741-21apt-get19:30:130
38509914918,26cyclictest13359-21apt-get20:05:150
38509914918,106cyclictest18169-21apt-get20:35:190
38509914915,23cyclictest24462-21sshd21:11:100
38509914912,25cyclictest30374-21latency_hist21:50:030
38509914912,21cyclictest17983-21grep20:31:020
38509914816,108cyclictest14278-21sshd23:30:110
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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