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2025-11-30 - 00:02

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #1, 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 here to display the system's profile data or here to proceed to next system.
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.
Unexpectedly long latencies may be caused by SMIs
Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 20 highest latencies:
System rack1slot2s.osadl.org (updated Sat Nov 29, 2025 12:43:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
291350810,0irq/25-eth10-21swapper/306:34:463
135925756,0sleep20-21swapper/206:38:182
111123624,0sleep10-21swapper/106:35:251
112923523,0sleep00-21swapper/006:35:360
28415070,0irq/27-eth0-tx-0-21swapper/211:29:022
339960,0migration/38200-21sh11:06:213
339960,0migration/35095-21sh09:43:393
339960,0migration/328840-21kthreadcore11:59:403
339960,0migration/323448-21sh11:58:033
339960,0migration/319032-21idleruntime10:54:383
339960,0migration/315001-21sh11:51:473
28415060,0irq/27-eth0-tx-22815-21ssh11:56:192
28415060,0irq/27-eth0-tx-0-21swapper/210:48:242
28415060,0irq/27-eth0-tx-0-21swapper/210:27:092
28415060,0irq/27-eth0-tx-0-21swapper/210:06:452
28405060,0irq/26-eth0-rx-26470-21ssh10:14:503
28405060,0irq/26-eth0-rx-25642-21perl11:19:343
28405060,0irq/26-eth0-rx-17560-21df_abs11:14:363
28405060,0irq/26-eth0-rx-16330-21interrupts09:09:373
249960,0watchdog/20-21swapper/211:34:352
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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