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2025-10-20 - 20:58

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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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 Mon Oct 20, 2025 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
50992720sleep1121550irq/30-eth0_g0_11:53:301
121620ksoftirqd/1121550irq/30-eth0_g0_10:41:300
261422550chrt121550irq/30-eth0_g0_11:06:000
121530ksoftirqd/1121550irq/30-eth0_g0_09:17:281
239672520sleep0121450irq/29-eth0_g0_10:57:550
121510ksoftirqd/1121550irq/30-eth0_g0_11:27:201
121550490irq/30-eth0_g0_1221-21kworker/1:210:32:281
121460ksoftirqd/1121450irq/29-eth0_g0_08:01:341
121450ksoftirqd/1121550irq/30-eth0_g0_10:41:081
121450ksoftirqd/1121550irq/30-eth0_g0_09:43:071
121450ksoftirqd/1121450irq/29-eth0_g0_10:12:191
261402440sleep1121550irq/30-eth0_g0_08:55:081
192652440sleep1121550irq/30-eth0_g0_08:25:171
159112440sleep0121450irq/29-eth0_g0_12:35:550
159112440sleep0121450irq/29-eth0_g0_12:35:550
121550440irq/30-eth0_g0_142152sleep110:18:341
121550440irq/30-eth0_g0_1221-21kworker/1:209:12:561
121440ksoftirqd/1121450irq/29-eth0_g0_08:15:381
121550430irq/30-eth0_g0_1221-21kworker/1:212:09:381
121550430irq/30-eth0_g0_121ksoftirqd/109:52:301
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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