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2025-08-21 - 21:33

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 50 highest latencies:
System rack4slot6s.osadl.org (updated Thu Aug 21, 2025 12:44:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2551121440,4chrt24882-21/usr/sbin/munin08:05:410
1043821360,3chrt10375-21/usr/sbin/munin11:20:150
2384421340,2sleep023846-21awk08:00:220
3215821330,3chrt32157-21sshd08:31:570
2007621260,2chrt20077-21/usr/sbin/munin07:45:280
3034721230,2sleep030349-21grep10:30:280
10573991218,17cyclictest13275-21/usr/sbin/munin07:20:260
10573991209,15cyclictest21051-21df07:50:130
10573991209,14cyclictest5358-21/usr/sbin/munin08:55:320
105739912012,18cyclictest23592-21/usr/sbin/munin10:05:160
2870521180,2sleep028704-21ntp_kernel_pll_12:30:220
10573991188,17cyclictest13307-21cat09:25:170
105739911810,19cyclictest1628-21ntp_states10:45:290
105739911810,16cyclictest5200-21/usr/sbin/munin11:00:160
10573991178,16cyclictest20576-21sendmail-msp12:00:010
10573991177,16cyclictest29648-21chrt10:28:570
105739911711,15cyclictest32365-21munin-run10:40:010
10573991169,15cyclictest4928-21chrt08:52:330
10573991169,15cyclictest25275-21lldpd11:43:040
10573991168,14cyclictest2932-21irqstats08:45:160
10573991167,17cyclictest12473-21/usr/sbin/munin07:15:290
2764621150,4sleep027346-21/usr/sbin/munin10:20:250
10573991159,15cyclictest30267-21/usr/sbin/munin12:35:290
10573991159,15cyclictest23403-21seq07:59:500
10573991158,16cyclictest6946-21chrt09:00:200
10573991158,16cyclictest14506-21ntp_states11:35:210
10573991158,15cyclictest18104-21/usr/sbin/munin11:50:320
10573991158,14cyclictest7387-21seq11:07:560
10573991157,13cyclictest23413-21latency12:10:170
105739911520,17cyclictest32707-21df08:35:120
105739911510,15cyclictest9444-21memory09:10:200
10573991149,16cyclictest16476-21seq07:30:460
10573991149,15cyclictest18297-21munin-run07:40:010
10573991149,14cyclictest20877-21sort12:00:210
10573991149,14cyclictest12128-21ntpq09:20:200
10573991148,15cyclictest13229-21ntp_states11:30:200
10573991148,15cyclictest11716-21munin-run09:20:010
10573991148,14cyclictest22327-21/usr/sbin/munin10:00:210
10573991147,15cyclictest18535-21if_err_eth007:40:180
105739911410,15cyclictest25730-21munin-run12:20:000
105739911410,12cyclictest322-21ntp_states10:40:220
10573991139,17cyclictest14563-21irqstats09:30:160
10573991139,14cyclictest269-21runrttasks11:13:250
10573991138,17cyclictest26026-21/usr/sbin/munin10:15:130
10573991138,15cyclictest30660-21vmstat08:25:320
10573991138,15cyclictest15720-21munin-run07:30:010
10573991128,16cyclictest26084-21cat12:20:210
10573991127,13cyclictest26510-21ps08:10:250
10573991126,15cyclictest2824-21wc10:50:210
10573991126,15cyclictest127752sleep011:29:450
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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