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2025-11-12 - 12:41

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 100 highest latencies:
System rack5slot7s.osadl.org (updated Wed Nov 12, 2025 00:45:09)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
24494224292195,91sleep00-21swapper19:07:420
247969916621,121cyclictest25636-21munin-run19:15:040
247969916517,40cyclictest6022-21df20:30:270
247969915816,118cyclictest2176-21users23:21:170
247969915726,22cyclictest0-21swapper22:40:450
247969915715,22cyclictest12886-21apt-get00:31:030
247969915711,121cyclictest21960-21apt-config22:10:070
247969915634,24cyclictest18790-21apt-get21:50:140
247969915618,111cyclictest9931-21apt-get20:55:200
247969915617,114cyclictest27417-21grep19:21:010
247969915613,25cyclictest347-21apt-get23:16:370
247969915611,123cyclictest29979-21cron19:40:010
247969915520,27cyclictest12193-21apt-get00:25:230
247969915517,26cyclictest21902-21apt-get22:10:360
247969915515,115cyclictest24284-21zcat22:20:570
247969915514,26cyclictest23462-21find22:16:030
247969915514,117cyclictest1569-21apt-get20:06:290
247969915512,24cyclictest11374-21head21:01:050
247969915512,120cyclictest28390-21grep22:46:310
247969915418,22cyclictest29015-21df_inode22:50:370
247969915417,98cyclictest18162-21irqstats21:45:390
247969915417,111cyclictest11275-21munin-run00:20:010
247969915416,24cyclictest26786-21munin-run19:20:030
247969915415,115cyclictest11664-21diskstats21:05:340
247969915316,24cyclictest7652-21diskstats20:40:380
247969915316,23cyclictest30404-21apt23:00:000
247969915315,114cyclictest4431-21df20:20:290
247969915315,113cyclictest17889-21apt21:45:000
247969915313,114cyclictest4749-21/usr/sbin/munin23:40:340
247969915311,118cyclictest4610-21munin-run23:40:030
247969915310,117cyclictest8167-21/usr/sbin/munin00:00:400
247969915222,26cyclictest32509-21apt-get19:55:230
247969915215,40cyclictest9033-21apt20:50:010
247969915214,23cyclictest19753-21irqstats21:55:380
247969915210,30cyclictest26244-21wc22:35:050
247969915121,28cyclictest24664-21apt-get22:25:210
247969915117,25cyclictest31092-21irqstats19:45:440
247969915116,111cyclictest27875-21irqstats19:25:390
247969915115,23cyclictest13147-21apt-get21:15:140
247969915114,100cyclictest13056-21grep21:15:040
247969915112,115cyclictest26259-21/usr/sbin/munin22:35:410
247969915111,115cyclictest14395-21/usr/sbin/munin21:20:560
247969915017,105cyclictest31822-21diskstats19:50:330
247969915015,38cyclictest14725-21munin-run00:40:010
247969915015,22cyclictest29195-21munin-run19:35:010
247969915015,111cyclictest2896-21sort23:26:030
247969914916,109cyclictest30115-21/usr/sbin/munin19:40:360
247969914915,36cyclictest15077-21grep21:25:520
247969914915,31cyclictest10081-21ntpq00:10:530
247969914912,27cyclictest449-21apt-config23:15:080
247969914833,19cyclictest0-21swapper20:15:050
247969914821,99cyclictest15684-21diskstats21:30:340
247969914725,102cyclictest5759-21apt-get23:45:150
247969914719,25cyclictest31495-21irqstats23:05:390
247969914716,106cyclictest3755-21grep23:31:040
247969914710,21cyclictest20403-21/usr/sbin/munin22:00:540
247969914632,92cyclictest0-21swapper23:05:010
247969914615,25cyclictest3668-21irqstats20:15:370
247969914614,22cyclictest1516-21head20:01:080
247969914612,112cyclictest31863-21snmpd23:50:490
247969914612,109cyclictest12020-21grep00:21:050
247969914611,111cyclictest7523-21cat20:40:070
247969914519,27cyclictest9244-21diskstats20:50:360
247969914511,113cyclictest16367-21/usr/sbin/munin21:35:160
247969914419,97cyclictest8966-21apt-get00:05:220
247969914318,24cyclictest7453-21df_inode23:55:300
247969914212,105cyclictest5784-21users20:26:070
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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