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2025-07-01 - 10:07

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, slot #3

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 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: 100 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 rackeslot3s.osadl.org (updated Tue Jul 01, 2025 00:45:08)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2667616998980,7cyclictest23-21ksoftirqd/123:20:011
266761299752,69cyclictest2669391-21pluginstate19:45:020
266761299752,69cyclictest2669391-21pluginstate19:45:010
2667612996927,38cyclictest2670678-21systemd-run20:10:010
2667623996626,36cyclictest2679327-21sed22:55:023
2667612996624,37cyclictest235-21systemd-journal00:17:470
2667612996521,40cyclictest2674813-21sshd21:28:070
2667623996421,38cyclictest272-21dbus-daemon19:25:013
2667623996326,33cyclictest2681584-21sshd23:35:463
2667623996323,36cyclictest412-21sshd20:38:473
2667623996322,36cyclictest37-21ksoftirqd/320:55:023
2667623996320,37cyclictest306-21in:imuxsock22:45:003
2667616996355,6cyclictest23-21ksoftirqd/120:40:011
2667612996336,23cyclictest19050irq/34-mmc123:15:020
266761299631,13cyclictest2672460-21sshd20:41:470
2667612996232,26cyclictest16950irq/224-800000020:00:000
2667612996225,33cyclictest2681883-21sshd23:44:470
2667612996225,33cyclictest2681883-21sshd23:44:470
2667623996123,34cyclictest2676198-21latency_hist21:55:023
2667612996114,41cyclictest308-21rs:main0
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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