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2025-11-19 - 18:00

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #7, slot #2

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 50 highest latencies:
System rack7slot2s.osadl.org (updated Wed Nov 19, 2025 12:49:09)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
346645799305173,84cyclictest171rcu_preempt09:26:080
346645799305173,84cyclictest171rcu_preempt09:26:070
346645799304143,109cyclictest0-21swapper/010:36:540
346645799304143,109cyclictest0-21swapper/010:36:530
346645799301159,86cyclictest0-21swapper/012:16:590
346645799297167,117cyclictest3492805-21sh09:40:040
346645799294176,83cyclictest171rcu_preempt10:15:350
346645799294176,83cyclictest171rcu_preempt10:15:350
346645799294142,107cyclictest0-21swapper/011:35:440
346645799294142,107cyclictest0-21swapper/011:35:430
346645799290162,77cyclictest171rcu_preempt08:21:120
346645799290162,77cyclictest171rcu_preempt08:21:120
34664579928995,86cyclictest3524227-21sh12:08:570
34664579928995,86cyclictest3524227-21sh12:08:560
346645799288217,58cyclictest148-21systemd-journal08:13:170
346645799288217,58cyclictest148-21systemd-journal08:13:170
346645799284131,99cyclictest0-21swapper/007:21:410
346645799284131,99cyclictest0-21swapper/007:21:410
346645799282202,67cyclictest3498592-21kworker/u10:3+rpciod10:28:200
346645799282202,67cyclictest3498592-21kworker/u10:3+rpciod10:28:200
346645799282166,102cyclictest0-21swapper/011:47:090
346645799282166,102cyclictest0-21swapper/011:47:090
346645799282132,97cyclictest3509076-21ntpq10:56:460
346645799282132,97cyclictest3509076-21ntpq10:56:460
346645799271137,112cyclictest3524201-21kworker/u10:1-rpciod12:36:120
346645799271114,113cyclictest3472689-21/usr/sbin/munin07:45:530
346645799269159,97cyclictest3486478-21diskmemload10:00:550
346645799268148,76cyclictest171rcu_preempt10:55:080
346645799268148,76cyclictest171rcu_preempt10:55:070
346645799266171,83cyclictest3475289-21ntpq08:01:250
346645799265176,74cyclictest0-21swapper/010:12:100
346645799265176,74cyclictest0-21swapper/010:12:090
346645799265165,59cyclictest171rcu_preempt08:45:040
346645799265162,86cyclictest0-21swapper/010:46:300
346645799264151,94cyclictest3477710-21gcc08:16:080
346645799264151,94cyclictest3477710-21gcc08:16:080
346645799263160,91cyclictest717-21lldpd07:36:100
346645799262162,79cyclictest3494785-21kworker/u9:6+rpciod10:06:160
346645799262127,120cyclictest0-21swapper/010:21:550
346645799262127,120cyclictest0-21swapper/010:21:550
346645799260105,136cyclictest3511558-21ssh11:07:410
346645799260105,136cyclictest3511558-21ssh11:07:410
346645799258151,93cyclictest3512251-21ntpq11:11:460
346645799258151,93cyclictest3512251-21ntpq11:11:450
346645799257171,73cyclictest3527774-21/usr/sbin/munin12:25:440
346645799257171,73cyclictest3527774-21/usr/sbin/munin12:25:440
346645799257156,87cyclictest3486478-21diskmemload09:14:480
346645799257156,87cyclictest3486478-21diskmemload09:14:470
346645799257116,123cyclictest9150irq/87-eth%d09:45:210
346645799257116,123cyclictest9150irq/87-eth%d09:45:200
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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