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2026-05-20 - 08:44

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 Wed May 20, 2026 00:45:10)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
29117224392197,88sleep00-21swapper19:06:440
295289916120,118cyclictest15102-21users00:12:080
295289916019,99cyclictest2758-21users22:56:040
295289916012,27cyclictest29622-21/usr/sbin/munin19:11:050
295289915912,119cyclictest3589-21/usr/sbin/munin19:45:360
295289915819,25cyclictest12784-21systemd-journal22:20:000
295289915813,122cyclictest19548-21apt21:25:020
295289915811,43cyclictest7264-21sshd20:05:590
295289915810,125cyclictest13122-21modprobe20:45:000
295289915722,30cyclictest10018-21apt-get20:25:200
295289915714,25cyclictest21270-21apt21:35:110
295289915711,106cyclictest9915-21sh20:25:010
295289915630,19cyclictest0-21swapper23:30:000
295289915617,114cyclictest30553-21apt-get22:30:120
295289915615,118cyclictest25384-21apt22:00:010
295289915612,119cyclictest4687-21tr19:50:490
295289915524,34cyclictest0-21swapper19:26:030
295289915518,26cyclictest14107-21munin-run00:10:050
295289915518,109cyclictest5182-21apt-get19:55:180
295289915517,23cyclictest29657-21munin-run22:25:020
295289915517,112cyclictest16726-21users00:21:090
295289915516,117cyclictest26999-21apt-get22:10:340
295289915515,114cyclictest2051-21latency_hist22:55:040
295289915511,120cyclictest20078-21wc21:25:550
295289915414,25cyclictest852-21apt-get19:31:380
295289915413,116cyclictest21140-21modprobe21:35:020
295289915410,119cyclictest5152-21sed23:11:020
295289915329,100cyclictest6650-21cut23:20:590
295289915316,23cyclictest9274-21apt23:40:010
295289915316,114cyclictest12313-21munin-run20:40:020
295289915315,37cyclictest408-21munin-run22:45:000
295289915315,24cyclictest4137-21grep23:05:540
295289915314,115cyclictest5396-21cstates23:15:260
295289915228,20cyclictest0-21swapper21:00:230
295289915220,26cyclictest14135-21diskstats20:50:340
295289915219,106cyclictest25511-21apt-get22:00:180
295289915217,26cyclictest10925-21diskstats20:30:340
295289915215,24cyclictest30414-21users22:26:070
295289915214,114cyclictest9400-21apt-get23:40:170
295289915125,99cyclictest17142-21nfs_client00:25:470
295289915118,22cyclictest31463-21apt-get19:21:110
295289915118,109cyclictest15522-21munin-run21:00:030
295289915116,20cyclictest2925-21apt23:00:110
295289915116,113cyclictest15947-21munin-run00:20:020
295289915115,24cyclictest17926-21munin-run21:15:030
295289915040,88cyclictest10569-21processes23:45:590
295289915033,19cyclictest0-21swapper00:00:500
295289915022,100cyclictest13339-21diskstats20:45:330
295289915018,107cyclictest7780-21apt-get23:30:120
295289915013,23cyclictest26409-21df22:05:270
295289914917,40cyclictest22995-21apt21:45:010
295289914913,113cyclictest20042-21snmpd19:16:030
295289914912,23cyclictest17657-21apt00:30:110
295289914912,113cyclictest6636-21unixbench_singl20:01:030
295289914911,117cyclictest31924-21grep22:36:020
295289914821,103cyclictest7833-21memory20:10:450
295289914818,104cyclictest23892-21apt-get21:50:170
295289914814,28cyclictest16433-21/usr/sbin/munin21:05:350
295289914812,22cyclictest1164-21/usr/sbin/munin22:46:040
295289914812,117cyclictest18735-21munin-run21:20:020
295289914812,113cyclictest12104-21ntp_states23:55:490
295289914811,23cyclictest23689-21grep21:46:090
295289914811,111cyclictest11713-21latency_hist23:55:030
29528991479,114cyclictest2551-21grep19:36:090
295289914714,23cyclictest8499-21diskstats20:15:300
295289914612,110cyclictest3088-21tr19:40:470
295289914510,112cyclictest18557-21/usr/sbin/munin00:35:270
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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