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2026-04-23 - 11:28

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 highest latencies:
System rack5slot7s.osadl.org (updated Thu Apr 23, 2026 00:45:10)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
5882223912158,179sleep00-21swapper19:09:060
60289916718,26cyclictest8336-21apt-get19:20:240
60289916220,112cyclictest17936-21apt-get23:35:160
60289916018,116cyclictest12967-21apt-get23:05:150
60289916016,22cyclictest20461-21diskstats23:50:330
60289916014,23cyclictest1140-21ntp_states21:51:330
60289915912,125cyclictest27573-21/usr/sbin/munin00:35:100
60289915819,26cyclictest19107-21apt-get20:26:010
60289915815,102cyclictest6144-21apt-get19:10:250
60289915814,37cyclictest11363-21find19:35:570
60289915814,23cyclictest10870-21cat19:35:050
6028991578,126cyclictest18873-21cut20:20:580
60289915717,24cyclictest18288-21apt20:20:010
60289915715,21cyclictest15659-21apt-get20:06:060
60289915628,106cyclictest0-21swapper21:50:050
60289915616,117cyclictest16459-21diskstats23:25:310
60289915616,116cyclictest26293-21grep00:25:500
60289915613,120cyclictest27450-21awk00:31:080
60289915613,100cyclictest6269-21sort22:21:000
60289915611,22cyclictest24342-21df20:55:280
60289915611,120cyclictest22176-21wc00:00:420
60289915516,38cyclictest30568-21munin-run21:35:020
60289915512,117cyclictest13114-21wc19:46:010
6028991549,24cyclictest16168-21sed23:21:030
60289915428,107cyclictest17412-21unixbench_singl20:11:100
60289915411,24cyclictest12738-21sed23:01:020
60289915315,26cyclictest30840-21irqstats21:35:370
60289915314,23cyclictest7378-21df22:30:270
60289915313,116cyclictest1963-21ntp_states21:55:590
60289915312,102cyclictest28013-21wc21:16:030
60289915222,30cyclictest25308-21memory21:00:460
60289915217,110cyclictest8392-21ntp_states22:35:520
60289915215,97cyclictest25285-21df00:20:260
60289915210,24cyclictest8311-21latency_hist19:20:110
60289915210,117cyclictest7177-21munin-run22:30:010
60289915122,27cyclictest22763-21apt-get00:05:210
60289915117,111cyclictest21733-21munin-run20:40:020
60289915113,116cyclictest12784-21systemd-journal19:55:010
60289915022,27cyclictest4850-21apt-get22:15:210
60289915016,111cyclictest14028-21df23:10:320
60289915014,27cyclictest2464-21/usr/sbin/munin22:00:550
60289915014,113cyclictest17836-21munin-run23:35:030
60289915013,39cyclictest29766-21modprobe21:30:010
60289915013,114cyclictest31490-21apt-get21:40:150
60289914922,35cyclictest0-21swapper20:41:020
60289914922,104cyclictest21460-21ntp_states23:55:510
60289914919,106cyclictest14845-21munin-run20:00:030
60289914917,22cyclictest272-21snmpd19:28:250
60289914916,25cyclictest26769-21diskstats21:10:350
60289914915,37cyclictest15661-21/usr/sbin/munin20:05:050
60289914912,23cyclictest23869-21ntpq00:10:510
6028991489,115cyclictest25167-21wc00:20:060
60289914829,22cyclictest24127-21modprobe20:55:010
60289914817,21cyclictest20929-21apt20:35:010
60289914810,99cyclictest3447-21uname22:05:410
60289914717,25cyclictest11757-21apt-get19:40:130
60289914717,105cyclictest22762-21diskstats20:45:350
60289914715,106cyclictest28361-21wc21:20:220
60289914711,113cyclictest19226-21mailstats23:41:000
60289914638,87cyclictest11653-21/usr/sbin/munin22:55:560
60289914619,101cyclictest14721-21apt-get23:15:200
60289914618,22cyclictest9932-21memory22:45:440
60289914613,109cyclictest8962-21cat22:40:250
60289914513,27cyclictest10728-21/usr/sbin/munin22:50:440
60289914511,98cyclictest4683-21head22:11:030
6028991449,110cyclictest25932-21cstates21:05:240
60289914318,22cyclictest19663-21diskstats23:45:320
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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