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2026-06-15 - 04:44

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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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 Mon Jun 15, 2026 00:44:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
128723170,66sleep01285-21latency23:55:170
1289222570,2sleep012893-21latency_hist22:35:020
1750621990,2sleep017507-21sort20:45:250
1556621300,3sleep015564-21grep20:40:020
273021240,4chrt2729-21ntpq00:00:240
3119321180,4chrt31194-21latency23:45:170
2329921170,4chrt23300-21egrep23:15:110
2481621150,2sleep024815-21sed19:10:020
2095521050,4sleep020978-21latency21:00:180
1231021010,3sleep012311-21sshd00:37:340
266532950,3sleep026722-21uptime19:15:270
198152940,3sleep019875-21processes20:55:250
262782910,4sleep026339-21/usr/sbin/munin23:25:260
316122880,3sleep031662-21grep19:35:260
32302700,3sleep03233-21sort19:50:280
24760996529,14cyclictest5196-21munin-node22:05:120
203542633,5sleep00-21swapper23:03:210
2476099619,20cyclictest27140-21/usr/sbin/munin23:30:140
24760996137,16cyclictest10465-21/usr/sbin/munin00:30:200
24760996110,17cyclictest1267-21/usr/sbin/munin21:50:200
2476099607,19cyclictest6291-21/usr/sbin/munin00:15:200
24760996032,18cyclictest24906-21/usr/sbin/munin23:20:240
24760996025,12cyclictest12953-21cpu22:35:100
24760996012,18cyclictest4061-21df19:55:120
24760996012,15cyclictest32447-21munin-node21:45:130
24760996010,16cyclictest23984-21users21:10:290
2476099599,16cyclictest16803-21/usr/sbin/munin22:50:250
24760995934,16cyclictest27587-21/usr/sbin/munin19:20:150
24760995910,17cyclictest14517-21/usr/sbin/munin22:40:200
24760995910,15cyclictest25865-21munin-run21:20:010
2476099589,16cyclictest4341-21/usr/sbin/munin22:00:250
2476099589,14cyclictest30218-21memory19:30:200
2476099587,17cyclictest28739-21/usr/sbin/munin19:25:110
24760995835,16cyclictest10502-21/usr/sbin/munin22:25:150
24760995833,16cyclictest16109-21/usr/sbin/munin22:45:280
24760995833,15cyclictest19064-21runrttasks20:52:300
24760995832,17cyclictest3994-21/usr/sbin/munin00:05:210
24760995810,14cyclictest29132-21/usr/sbin/munin21:30:270
2476099579,15cyclictest7615-21grep00:20:130
2476099579,14cyclictest24858-21/usr/sbin/munin19:10:250
2476099578,16cyclictest29931-21awk21:35:150
2476099577,17cyclictest15653-21/usr/sbin/munin20:40:140
2476099576,19cyclictest20950-21ntpq23:05:210
24760995732,17cyclictest18484-21/usr/sbin/munin22:55:250
24760995721,13cyclictest2594-21/usr/sbin/munin21:55:120
24760995715,13cyclictest9812chrt19:42:170
2476099569,18cyclictest8033-21ntpq22:15:200
2476099569,17cyclictest8493-21/usr/sbin/munin20:10:280
2476099568,16cyclictest5318-21/usr/sbin/munin20:00:200
2476099568,16cyclictest25999-21/usr/sbin/munin21:20:130
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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