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2025-12-18 - 13:07

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #3, slot #5

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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  Eltec
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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 rack3slot5s.osadl.org (updated Wed Dec 17, 2025 13:46:03)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2817821290sleep0121450irq/29-eth0_g0_11:33:410
2817821290sleep0121450irq/29-eth0_g0_11:33:410
1254221060sleep1121450irq/29-eth0_g0_10:30:521
121900ksoftirqd/1121550irq/30-eth0_g0_11:21:331
121870ksoftirqd/1121550irq/30-eth0_g0_11:27:421
121870ksoftirqd/1121450irq/29-eth0_g0_11:37:350
121870ksoftirqd/1121450irq/29-eth0_g0_11:37:350
121820ksoftirqd/1121550irq/30-eth0_g0_10:50:581
77032760sleep1121450irq/29-eth0_g0_07:57:361
77032760sleep1121450irq/29-eth0_g0_07:57:361
299082690sleep0121550irq/30-eth0_g0_09:27:390
121680ksoftirqd/1121550irq/30-eth0_g0_07:32:341
121560ksoftirqd/1121550irq/30-eth0_g0_07:12:450
28652550sleep0121450irq/29-eth0_g0_09:52:080
270062540sleep0121450irq/29-eth0_g0_11:29:200
219772540sleep1121550irq/30-eth0_g0_08:57:281
121540ksoftirqd/1121550irq/30-eth0_g0_12:26:341
168672510sleep0121450irq/29-eth0_g0_10:47:340
121510ksoftirqd/1121550irq/30-eth0_g0_11:45:271
121490ksoftirqd/1121550irq/30-eth0_g0_09:33:571
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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