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2026-08-12 - 23:31

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 792 highest latencies:
System rack4slot6s.osadl.org (updated Wed Aug 12, 2026 12:44:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1443923060,3sleep014442-21switchtime09:10:260
2446822650,3sleep024469-21ps11:55:220
2028722500,2sleep020286-21egrep11:40:110
2820522250,2sleep028206-21basename08:00:000
1528121510,2sleep015282-21munin-plugin-st07:10:000
1382921370,3chrt13830-21modprobe09:10:000
2833721150,2sleep028338-21cat10:05:180
3045021050,3sleep030497-21modprobe12:20:010
2289021050,2sleep022891-21cut09:45:010
126721000,4sleep01307-21users12:30:290
1257421000,4sleep012515-21/usr/sbin/munin11:10:130
27462967,12sleep02810-21wc08:25:280
61532936,12sleep06166-21irqstats10:45:170
164492916,11sleep016458-21df11:25:120
204412865,10sleep020456-21munin-run07:30:010
89562850,4sleep08987-21sed08:50:190
38942827,63sleep03895-21ntp_states08:30:220
98272806,61sleep09878-21latency_hist11:00:020
49292780,3sleep04963-21netstat10:40:190
279002780,3sleep027896-21latency_hist12:10:000
232182785,60sleep023223-21df07:40:120
158902743,6sleep00-21swapper11:21:520
74462640,2sleep07448-21latency_hist08:45:020
15307996413,18cyclictest276-21runrttasks08:55:200
218612620,2sleep021864-21wc07:35:090
1530799626,12cyclictest30980-21/usr/sbin/munin08:10:140
15307996119,12cyclictest288-21snmpd10:21:440
1530799609,18cyclictest18061-21df07:20:120
1530799598,17cyclictest32410-21/usr/sbin/munin12:25:260
15307995935,15cyclictest31024-21/usr/sbin/munin12:20:260
15307995934,15cyclictest23045-21/usr/sbin/munin09:45:120
15307995910,17cyclictest32581-21/usr/sbin/munin08:15:260
15307995910,15cyclictest20767-21memory07:30:190
1530799589,15cyclictest24325-21/usr/sbin/munin09:50:120
1530799589,15cyclictest20795-21/usr/sbin/munin09:35:260
1530799589,15cyclictest15702-21ntp_states07:10:240
15307995833,16cyclictest1125-21/usr/sbin/munin08:20:160
15307995833,15cyclictest2516-21/usr/sbin/munin12:35:260
15307995832,16cyclictest1145-21/usr/sbin/munin10:25:220
15307995829,20cyclictest29623-21runrttasks10:10:160
15307995820,13cyclictest3430-21cpu10:35:100
15307995814,13cyclictest106552chrt11:01:180
15307995810,16cyclictest29912-21ntp_states08:05:240
1530799578,16cyclictest5764-21sshd08:37:440
1530799578,16cyclictest28329-21munin-node08:00:120
1530799578,15cyclictest18268-21mailstats09:25:260
1530799578,15cyclictest13794-21/usr/sbin/munin11:15:260
1530799577,17cyclictest7306-21/usr/sbin/munin10:50:180
15307995732,17cyclictest30797-21/usr/sbin/munin10:15:150
15307995732,16cyclictest22900-21/usr/sbin/munin11:50:130
15307995730,15cyclictest25636-21/usr/sbin/munin09:55:140
15307995710,15cyclictest16608-21df_inode09:20:140
1530799569,16cyclictest285-21sshd11:05:440
1530799569,15cyclictest28011-21/usr/sbin/munin12:10:150
1530799568,15cyclictest11357-21/usr/sbin/munin09:00:140
15307995633,14cyclictest2207-21/usr/sbin/munin10:30:120
15307995632,15cyclictest15747-21/usr/sbin/munin09:15:260
15307995631,17cyclictest19364-21/usr/sbin/munin09:30:200
1530799559,16cyclictest7999-21/usr/sbin/munin08:45:270
1530799557,16cyclictest26867-21/usr/sbin/munin10:00:210
1530799557,15cyclictest25441-21/usr/sbin/munin12:00:170
15307995531,16cyclictest16835-21/usr/sbin/munin07:15:160
1530799549,13cyclictest19021-21df11:35:130
15307995431,15cyclictest21625-21/usr/sbin/munin11:45:140
15307995428,16cyclictest18452-21runrttasks11:31:490
15307995410,19cyclictest25719-21chrt07:50:040
15307995310,16cyclictest24510-21df_inode07:45:140
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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