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2026-11-06 - 23:12

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #b, slot #7

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.

Note that this system runs a non-RT kernel.
Data to construct the above plot have been generated using the RT test utility cyclictest.

Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 20 highest latencies:
System rackbslot7s.osadl.org (updated Fri Nov 06, 2026 12:43:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
4337226249,2601sleep34058-21kworker/3:008:14:133
12285270743,629sleep112321-21ntpq10:20:161
12285270743,629sleep112321-21ntpq10:20:161
3497257713,548sleep03545-21ntpq08:10:140
498223667,347sleep15029-21ntpq11:40:161
157922297120,120sleep10-21swapper/107:09:531
23556227080,138sleep123593-21modprobe09:14:491
214752253113,78sleep10-21swapper/112:34:521
24341225254,144sleep124315-21/usr/sbin/munin11:00:061
24341225254,144sleep124315-21/usr/sbin/munin11:00:061
28395222742,131sleep1367-21snmpd09:28:551
30333222127,156sleep130336-21grep09:35:041
15078221772,28sleep10-21swapper/110:30:091
14009221319,155sleep114193-21sort07:04:521
14009221319,155sleep114193-21sort07:04:521
30332219766,21sleep10-21swapper/111:19:521
23634219717,158sleep323722-21wc09:14:513
25914218620,125sleep10-21swapper/109:20:181
1741521797,130sleep117459-21ntp_kernel_err12:20:141
29103217345,105sleep10-21swapper/107:49:521
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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