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2025-08-30 - 01:05

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 Fri Aug 29, 2025 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
121770ksoftirqd/12288650irq/29-eth0_g0_09:21:091
121500ksoftirqd/12288650irq/29-eth0_g0_11:55:401
121500ksoftirqd/12288650irq/29-eth0_g0_10:56:011
2288750480irq/30-eth0_g0_31ksoftirqd/010:26:000
2288650480irq/29-eth0_g0_31ksoftirqd/010:06:040
2288650450irq/29-eth0_g0_470-21kworker/1:109:26:521
121450ksoftirqd/12288650irq/29-eth0_g0_10:35:211
121440ksoftirqd/12288650irq/29-eth0_g0_12:31:031
121440ksoftirqd/12288650irq/29-eth0_g0_11:49:251
121440ksoftirqd/12288650irq/29-eth0_g0_11:05:020
2288750430irq/30-eth0_g0_22885-21kworker/0:210:18:380
2288750430irq/30-eth0_g0_22885-21kworker/0:210:18:380
2288650430irq/29-eth0_g0_470-21kworker/1:111:56:051
121430ksoftirqd/12288750irq/30-eth0_g0_12:06:100
121430ksoftirqd/12288750irq/30-eth0_g0_12:03:071
121430ksoftirqd/12288650irq/29-eth0_g0_11:10:471
121430ksoftirqd/12288650irq/29-eth0_g0_10:53:381
2288750420irq/30-eth0_g0_32740-21ntp_kernel_pll_11:31:041
2288750420irq/30-eth0_g0_31316-21find08:01:080
2288750420irq/30-eth0_g0_31ksoftirqd/011:41:360
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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