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2025-12-11 - 13:46

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 Thu Dec 11, 2025 00:43:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
180012239313,2368sleep314821-21kworker/3:221:41:583
194802100013,968sleep319515-21memory23:28:163
194802100013,968sleep319515-21memory23:28:163
6341277113,741sleep06347-21/usr/sbin/munin00:28:030
2277525599,538sleep17679-21kworker/u8:423:38:201
27987242319,385sleep328019-21/usr/sbin/munin22:12:563
807923879,341sleep28167-21cut22:52:532
26851232113,266sleep226886-21idleruntime-cro20:27:332
15536230314,273sleep015567-21latency_hist23:17:350
1861122990,14sleep231861-21cyclictest21:42:572
7207228019,244sleep37226-21latency_hist00:32:343
11284227083,91sleep211430-21unixbench_singl21:18:062
21514225169,139sleep221615-21timerandwakeup20:08:072
3261224036,186sleep23327-21awk00:18:032
454622360,7sleep10-21swapper/120:58:211
32176222751,160sleep232218-21fschecks_count00:07:532
10224222412,147sleep210368-21tail22:58:062
1575122128,192sleep215753-21acpi23:17:452
28980220915,177sleep029011-21idleruntime-cro22:17:330
25584220323,166sleep325585-21sshd22:04:153
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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