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2026-07-31 - 10:18

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 here to display the system's profile data or here to proceed to next system.
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 Fri Jul 31, 2026 00:44:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1906022070,3sleep019056-21cat22:55:020
2752621630,3sleep027600-21grep19:15:270
150121330,3sleep01503-21cut21:45:260
1600521300,4chrt15393-21/usr/sbin/munin20:35:310
3207721250,4chrt32075-21df23:45:120
2677921140,4chrt26777-21sort23:25:020
1042821110,3chrt10431-21sort20:15:180
1307621080,4sleep013104-21/usr/sbin/munin20:25:200
2705121070,3sleep027058-21egrep21:20:120
154121020,4sleep01615-21fgrep19:40:250
3093321000,3sleep030956-21grep23:40:200
1717321000,4sleep017241-21grep20:40:260
204872960,3sleep020523-21if_eth023:00:190
72942870,4sleep07304-21cpu00:15:110
297602860,3sleep029834-21fgrep23:35:250
20082800,2sleep02010-21basename23:55:000
2473927621,31sleep024753-21irqstats19:05:150
313762725,57sleep031377-21ntp_states19:30:240
216242703,5sleep00-21swapper20:59:230
25814996528,16cyclictest29696-21latency_hist19:25:000
2581499618,18cyclictest3440-21/usr/sbin/munin00:00:150
25814996111,19cyclictest10276-21memory22:20:160
25814996030,22cyclictest29791-21runrttasks21:30:180
25814996010,18cyclictest5136-21fgrep00:05:280
2581499598,18cyclictest32626-21ntpq19:35:200
25814995922,13cyclictest5318-21ntp_kernel_err19:55:200
25814995910,16cyclictest12464-21/usr/sbin/munin00:35:210
2581499589,17cyclictest26868-21/usr/sbin/munin23:25:220
2581499588,23cyclictest288-21snmpd20:20:240
2581499588,18cyclictest29985-21seq19:25:180
2581499588,17cyclictest28589-21/usr/sbin/munin21:25:210
2581499588,17cyclictest28550-21grep23:30:260
2581499587,17cyclictest7483-21/usr/sbin/munin22:10:240
25814995834,16cyclictest14581-21/usr/sbin/munin20:30:260
25814995834,15cyclictest15454-21/usr/sbin/munin22:40:190
25814995834,14cyclictest25929-21/usr/sbin/munin21:15:210
25814995830,17cyclictest22010-21/usr/sbin/munin21:00:170
25814995823,23cyclictest946-21ntpd23:55:210
2581499579,16cyclictest25985-21cat19:10:120
2581499578,17cyclictest9572-21sshd22:17:040
2581499578,17cyclictest14182-21awk22:35:190
2581499577,17cyclictest22976-21/usr/sbin/munin23:10:250
25814995733,16cyclictest2797-21/usr/sbin/munin21:50:280
25814995733,15cyclictest6441-21/usr/sbin/munin20:00:140
25814995732,16cyclictest24518-21/usr/sbin/munin23:15:200
2581499569,15cyclictest19268-21/usr/sbin/munin20:50:270
2581499568,15cyclictest12796-21irqstats22:30:160
2581499567,17cyclictest10159-21ntpq00:25:220
25814995617,14cyclictest19222-21cat22:55:160
25814995610,13cyclictest17986-21/usr/sbin/munin20:45:140
2581499559,14cyclictest32211-21/usr/sbin/munin21:40:200
2581499558,16cyclictest3887-21seq21:55:210
2581499558,14cyclictest6022-21/usr/sbin/munin00:10:350
2581499557,15cyclictest11182-21/usr/sbin/munin00:30:150
25814995533,13cyclictest9667-21runrttasks20:11:260
25814995532,15cyclictest9060-21/usr/sbin/munin00:20:270
25814995532,15cyclictest12444-21runrttasks22:29:230
25814995531,16cyclictest31229-21/usr/sbin/munin21:35:250
25814995530,16cyclictest4462-21runrttasks19:51:090
25814995529,17cyclictest5941-21runrttasks22:03:570
25814995529,17cyclictest24592-21irqstats21:10:170
25814995515,12cyclictest0-21swapper20:05:140
25814995511,17cyclictest6264-21df_inode22:05:140
25814995430,15cyclictest16580-21/usr/sbin/munin22:45:120
25814995430,14cyclictest22097-21/usr/sbin/munin23:05:280
25814995329,15cyclictest23148-21munin-node21:05:100
2581499519,15cyclictest2493-21/usr/sbin/munin19:45:150
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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