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2026-04-14 - 13:45

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 all highest latencies:
System rack5slot7s.osadl.org (updated Tue Apr 14, 2026 00:45:11)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
4458224352192,97sleep00-21swapper19:09:270
45699916541,103cyclictest19105-21mailstats20:35:580
45699916415,123cyclictest16727-21apt-get23:41:060
45699916129,22cyclictest0-21swapper20:11:000
45699915921,110cyclictest31400-21apt-get21:50:160
45699915816,117cyclictest28191-21/usr/sbin/munin21:30:580
45699915714,27cyclictest7615-21uname19:25:400
45699915616,25cyclictest26683-21df_inode21:21:060
45699915613,27cyclictest16727-21apt23:40:020
45699915516,114cyclictest19356-21apt-get20:41:300
45699915513,120cyclictest25550-21wc21:15:220
45699915417,24cyclictest10311-21munin-run23:00:020
45699915416,113cyclictest24300-21apt-get00:25:110
45699915415,23cyclictest17069-21apt-get20:25:170
45699915412,117cyclictest21201-21apt20:50:010
45699915412,117cyclictest18244-21grep23:46:030
45699915314,99cyclictest8311-21wc22:46:000
45699915313,42cyclictest24383-21/usr/sbin/munin21:06:570
45699915312,117cyclictest22719-21head20:56:040
45699915236,95cyclictest30728-21forks21:45:350
45699915219,24cyclictest25098-21apt-get00:30:170
45699915219,105cyclictest6634-21apt-get19:20:150
45699915219,104cyclictest13647-21apt-get23:20:170
45699915216,113cyclictest12129-21apt19:55:020
45699915215,114cyclictest23614-21munin-run21:05:010
45699915214,38cyclictest9489-21/usr/sbin/munin19:35:580
45699915212,25cyclictest23391-21readlink00:20:020
45699915212,115cyclictest20782-21cut00:01:140
45699915210,24cyclictest921-21ps22:00:590
45699915118,24cyclictest13157-21df_inode20:00:280
45699915113,41cyclictest13241-21find23:15:560
45699915113,27cyclictest15335-21df23:30:270
45699915113,23cyclictest18109-21cat20:30:470
45699915112,113cyclictest10429-21/usr/sbin/munin23:00:580
45699915017,27cyclictest12231-21apt-get19:55:210
45699915016,31cyclictest26546-21users00:36:070
45699915015,24cyclictest8646-21apt-get22:50:260
45699915014,37cyclictest14527-21sshd20:10:010
45699915013,24cyclictest7163-21/usr/sbin/munin22:40:390
45699915013,111cyclictest21501-21grep00:05:560
45699915012,114cyclictest18856-21uname23:50:420
45699915010,116cyclictest5423-21/usr/sbin/munin22:30:220
45699915010,115cyclictest6632-21which22:36:010
45699914937,22cyclictest5321-21latency_hist22:30:030
45699914936,23cyclictest2959-21cpu22:15:210
45699914933,93cyclictest14875-21awk23:25:570
45699914918,106cyclictest5376-21munin-node19:15:090
45699914918,104cyclictest29809-21apt-get21:40:170
45699914915,94cyclictest20168-21munin-run00:00:020
45699914914,108cyclictest22197-21ntpq00:10:510
45699914913,113cyclictest272-21snmpd20:50:420
45699914911,22cyclictest27706-21ntpq21:26:120
4569991489,117cyclictest11364-21wc19:50:040
45699914831,20cyclictest15733-21tr20:15:480
45699914821,100cyclictest32193-21apt-get21:55:200
45699914820,27cyclictest3877-21df22:20:270
45699914812,114cyclictest23857-1kworker/u3:021:10:170
45699914811,112cyclictest10129-21grep19:40:480
45699914629,22cyclictest0-21swapper20:20:130
45699914620,22cyclictest23508-21apt-get00:20:190
45699914618,103cyclictest1456-21df_inode22:05:270
45699914614,28cyclictest2145-21/usr/sbin/munin22:10:360
45699914610,108cyclictest5651-21users19:15:240
45699914414,24cyclictest8400-21/usr/sbin/munin19:30:380
45699914414,102cyclictest12122-21df23:10:270
45699914315,22cyclictest11326-21df23:05:270
45699914314,25cyclictest29122-21/usr/sbin/munin21:35:360
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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