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2026-05-01 - 20:44

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #4, slot #6

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 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 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes
Compare latency of primary with shadow system
Characteristics of the highest latencies:
System rack4slot6s.osadl.org (updated Fri May 01, 2026 12:44:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1577822570,2sleep015779-21latency_hist08:35:010
2794321700,3sleep027941-21grep07:15:200
718821390,4chrt6846-21/usr/sbin/munin08:00:230
681721360,2sleep06816-21pluginstate12:10:240
2248121260,4chrt22480-21interrupts09:00:160
874321210,4chrt8139-21/usr/sbin/munin08:05:300
1341721200,4chrt13409-21ntp_states10:30:200
526121160,3chrt5260-21/usr/sbin/munin12:05:120
1881121160,3chrt18813-21sed10:50:240
2904521150,3sleep028984-21/usr/sbin/munin07:20:120
1175921150,3chrt11760-21/usr/sbin/munin12:30:140
1716721050,4sleep017193-21/usr/sbin/munin10:45:170
2217621030,3sleep022224-21df11:05:110
420021000,4sleep04199-21ntp_states12:00:210
13802910,4sleep01411-21latency_hist09:45:000
105472880,3sleep010548-21sshd08:14:500
237702870,3sleep023771-21awk09:05:160
263522830,2sleep026351-21wc07:10:010
52192814,7sleep0288-21snmpd09:59:570
310692800,2sleep031071-21sh11:40:000
318892690,2sleep031890-21cat09:35:260
26289996411,18cyclictest1607-21ntp_states11:50:200
26289996320,13cyclictest7685-21sshd10:08:500
2628999627,21cyclictest4251-21/usr/sbin/munin07:50:260
280992600,3sleep028100-21wc09:20:260
2628999609,19cyclictest31216-21/usr/sbin/munin11:40:170
2628999609,15cyclictest13124-21memory12:35:170
26289996033,16cyclictest17494-21/usr/sbin/munin08:40:230
26289996022,15cyclictest33852chrt09:50:270
26289996010,23cyclictest24616-21awk11:15:010
26289996010,16cyclictest18652-21memory08:45:170
2628999599,15cyclictest30096-21/usr/sbin/munin09:30:260
26289995933,17cyclictest11986-21/usr/sbin/munin10:25:150
26289995916,14cyclictest288-21snmpd10:20:010
2628999589,16cyclictest10372-21/usr/sbin/munin12:25:250
26289995835,14cyclictest19796-21/usr/sbin/munin08:50:110
26289995833,17cyclictest5727-21runrttasks07:55:170
26289995832,14cyclictest31716-21/usr/sbin/munin07:30:170
26289995820,12cyclictest1516-21/usr/sbin/munin09:45:150
26289995817,14cyclictest946-21ntpd10:20:220
26289995810,20cyclictest14709-21ntpq10:35:220
26289995810,18cyclictest15992-21ntpq10:40:190
2628999579,18cyclictest417-21df07:35:100
2628999578,20cyclictest28620-21/usr/sbin/munin11:30:220
2628999578,16cyclictest17043-21munin-run08:40:000
26289995734,15cyclictest27643-21/usr/sbin/munin11:25:230
26289995731,16cyclictest26654-21/usr/sbin/munin09:15:260
26289995731,16cyclictest21784-21runrttasks11:02:540
26289995730,16cyclictest25434-21/usr/sbin/munin09:10:260
26289995710,15cyclictest3255-21ntp_states07:45:220
2628999569,20cyclictest5640-21ntpq10:00:180
2628999569,19cyclictest26823-21mailstats07:10:260
2628999569,14cyclictest12023-21/usr/sbin/munin08:20:250
2628999568,16cyclictest30271-21/usr/sbin/munin07:25:190
2628999567,17cyclictest32675-21ls11:45:180
26289995632,15cyclictest9153-21runrttasks12:20:130
26289995631,16cyclictest19825-21/usr/sbin/munin10:55:190
26289995611,14cyclictest288-21snmpd11:24:520
26289995610,15cyclictest24736-21/usr/sbin/munin11:15:210
2628999558,14cyclictest10705-21/usr/sbin/munin08:15:150
26289995531,15cyclictest7957-21/usr/sbin/munin12:15:160
26289995510,19cyclictest288-21snmpd11:55:210
26289995510,16cyclictest21082-21df08:55:100
2628999548,14cyclictest8147-21memory10:10:170
2628999547,19cyclictest13710-21wc08:25:250
26289995430,15cyclictest1940-21/usr/sbin/munin07:40:180
2628999539,16cyclictest28999-21memory09:25:170
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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