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2025-12-28 - 11:39

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 20 highest latencies:
System rack4slot6s.osadl.org (updated Sun Dec 28, 2025 00:44:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
533022440,3sleep05331-21readlink00:25:270
868622150,2sleep08687-21latency_hist00:40:020
387221150,4chrt3871-21/usr/sbin/munin00:20:180
883421140,3chrt8829-21latency_hist22:35:000
1436821120,4chrt14102-21/usr/sbin/munin22:55:210
246521100,4chrt2463-21sshd20:04:290
3271021090,4chrt32711-21awk22:00:290
1204121090,3chrt12042-21cat22:45:260
818821070,3chrt8190-21processes20:25:270
1295321050,3chrt12957-21interrupts22:50:160
313652980,3sleep031397-21/usr/sbin/munin21:55:260
39622950,3sleep03970-21grep22:15:190
264322950,3sleep026506-21mailstats19:30:260
235732916,11sleep023576-21df_inode19:20:150
25472868,65sleep02553-21df_inode22:10:140
232202840,4sleep023159-21/usr/sbin/munin23:30:160
179562790,3sleep017955-21sort23:10:010
1988527219,30sleep019898-21ntp_states19:05:230
20809996128,21cyclictest20808-21runrttasks21:15:140
20809996111,15cyclictest10254-21/usr/sbin/munin22:40:200
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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