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2025-06-18 - 23:15

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 Wed Jun 18, 2025 12:44:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1029021240,3chrt10292-21proc_pri09:45:280
22639912126,15cyclictest8941-21/usr/sbin/munin09:40:220
22639912032,15cyclictest6118-21/usr/sbin/munin11:35:170
2070021200,2sleep020701-21/usr/sbin/munin08:20:200
22639911927,15cyclictest28308-21/usr/sbin/munin08:50:160
1169621190,3chrt11695-21/usr/sbin/munin11:55:280
22639911827,14cyclictest32527-21/usr/sbin/munin09:05:290
22639911631,15cyclictest12842-21/usr/sbin/munin09:55:320
22639911625,17cyclictest22895-21awk08:30:000
22639911527,16cyclictest29521-21df_inode08:55:130
22639911425,14cyclictest11696-21ntpq07:45:250
22639911327,13cyclictest5994-21latency_hist11:35:010
22639911227,13cyclictest31995-21latency_hist11:10:020
22639911224,16cyclictest6420-21/usr/sbin/munin09:30:320
2263991118,14cyclictest5897-21sshd09:29:450
22639911126,14cyclictest13692-21latency_hist12:05:010
22639911110,17cyclictest18408-21sshd10:16:140
22639911014,18cyclictest28339-21memory10:55:210
2263991099,16cyclictest25614-21/usr/sbin/munin08:40:150
2263991088,17cyclictest17855-21/usr/sbin/munin08:10:260
22639910826,16cyclictest19718-21runrttasks10:20:430
22639910826,14cyclictest19161-21missed_timers12:25:200
2263991079,15cyclictest20822-21users12:30:300
2263991078,16cyclictest24907-21awk10:40:310
2263991078,14cyclictest7348-21/usr/sbin/munin09:35:290
22639910730,14cyclictest17506-21runrttasks10:14:260
22639910710,15cyclictest14081-21sh12:05:260
2263991069,14cyclictest9308-21switchtime07:35:290
2263991068,19cyclictest2785-21expr07:10:330
2263991068,16cyclictest15892-21sshd08:00:340
2263991068,15cyclictest15166-21df_inode10:05:170
2263991067,14cyclictest3929-21ntp_states07:15:210
22639910628,14cyclictest13486-21runrttasks07:52:080
2263991059,17cyclictest21807-21seq12:35:250
2263991059,15cyclictest30838-21df_inode09:00:170
2263991059,14cyclictest9895-21/usr/sbin/munin11:50:300
2263991058,16cyclictest20316-21munin-run08:20:010
2263991057,17cyclictest8026-21/usr/sbin/munin07:30:290
2263991057,16cyclictest15357-21ntp_states12:10:250
2263991057,14cyclictest4967-21/usr/sbin/munin07:20:170
22639910510,17cyclictest13953-21irqstats10:00:170
22639910510,14cyclictest27399-21seq10:50:290
2263991049,16cyclictest7444-21cat11:40:150
2263991047,12cyclictest145282sleep007:55:310
22639910411,15cyclictest12425-21wc09:55:020
2263991039,13cyclictest65312sleep007:25:220
2263991039,13cyclictest29703-21/usr/sbin/munin11:00:200
2263991038,28cyclictest4245-21seq09:21:410
2263991038,15cyclictest25424-21seq08:39:490
2263991038,14cyclictest26950-21df08:45:150
22639910325,15cyclictest831-21runrttasks11:15:030
2263991029,15cyclictest17750-21cat08:10:010
2263991028,16cyclictest41312chrt11:26:030
2263991028,16cyclictest23046-21df10:35:140
2263991028,15cyclictest11187-21seq07:44:220
2263991027,14cyclictest23068-21df08:30:120
2263991019,15cyclictest9163-21timerandwakeup11:45:290
2263991008,14cyclictest17864-21missed_timers12:20:200
226399997,14cyclictest16557-21wc12:15:230
226399989,13cyclictest26098-21cat10:45:310
157727220,28sleep01649-21users07:05:280
33632630,6sleep03358-21systemctl09:20:010
2263996010,16cyclictest32033-21/usr/sbin/munin11:10:280
226399579,14cyclictest889-21/usr/sbin/munin09:10:270
2263995715,16cyclictest22862chrt11:20:160
226399567,16cyclictest21709-21/usr/sbin/munin10:30:220
2263995510,18cyclictest269-21runrttasks10:25:170
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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