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2025-04-02 - 05:29

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #9, slot #8

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: 50 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 rack9slot8s.osadl.org (updated Wed Apr 02, 2025 00:44:37)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
818501710,0irq/46-4a10000010725-21runrttasks19:06:520
81850780,0irq/46-4a1000004372-21kworker/u2:821:28:080
81850770,0irq/46-4a1000005135-21seq22:45:430
81850760,0irq/46-4a10000026575-21rm22:19:300
81850760,0irq/46-4a10000017864-21ssh00:36:290
81850760,0irq/46-4a10000010894-21rm22:59:520
81850750,0irq/46-4a10000029994-21diskmemload22:41:030
81850750,0irq/46-4a10000014424-21ls21:50:050
81850750,0irq/46-4a10000012549-21ssh00:22:210
81850740,0irq/46-4a1000005595-21apt-get00:05:240
81850740,0irq/46-4a10000029994-21diskmemload23:18:090
81850740,0irq/46-4a10000029994-21diskmemload21:40:000
81850740,0irq/46-4a10000027383-21kworker/u2:421:00:330
81850730,0irq/46-4a1000003929-21latency_hist21:25:040
81850730,0irq/46-4a10000030890-21rm22:29:490
81850730,0irq/46-4a10000030003-21munin-run21:10:020
81850730,0irq/46-4a10000022826-21sshd23:28:230
81850730,0irq/46-4a10000020140-21kworker/u2:523:23:290
81850730,0irq/46-4a10000014852-21sh00:28:180
81850720,0irq/46-4a10000029370-21rm23:43:500
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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