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2025-05-02 - 12:53

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #7, 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 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.

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 50 highest latencies:
System rack7slot2s.osadl.org (updated Fri May 02, 2025 00:48:57)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
303387599282180,55cyclictest3080120-21/usr/sbin/munin23:17:090
303387599279185,48cyclictest14-21ksoftirqd/019:30:000
303387599278185,53cyclictest14-21ksoftirqd/022:25:550
303387599273162,68cyclictest171rcu_preempt22:16:590
303387599269167,53cyclictest171rcu_preempt20:20:010
303387599269167,53cyclictest171rcu_preempt20:20:010
303387599269149,105cyclictest3076984-21/usr/sbin/munin23:01:280
303387599269149,105cyclictest3076984-21/usr/sbin/munin23:01:280
303387599267156,95cyclictest3040048-21ntp_kernel_pll_19:46:150
303387599266159,93cyclictest3042537-21ntp_kernel_pll_20:01:220
303387599266159,93cyclictest3042537-21ntp_kernel_pll_20:01:220
303387599262184,36cyclictest14-21ksoftirqd/023:20:160
303387599262114,127cyclictest3057734-21kworker/u9:13+xprtiod21:35:030
303387599262114,127cyclictest3057734-21kworker/u9:13+xprtiod21:35:030
303387599260196,50cyclictest0-21swapper/021:41:370
303387599260196,50cyclictest0-21swapper/021:41:370
303387599260107,137cyclictest3095907-21apt-get00:30:240
303387599259174,50cyclictest14-21ksoftirqd/000:04:360
303387599259158,84cyclictest0-21swapper/021:37:070
303387599259158,84cyclictest0-21swapper/021:37:070
303387599259151,94cyclictest3072196-21mailstats22:37:010
303387599259151,94cyclictest3072196-21mailstats22:37:010
303387599259149,94cyclictest0-21swapper/021:52:110
303387599259149,94cyclictest0-21swapper/021:52:110
303387599259144,98cyclictest9150irq/87-eth%d20:30:240
303387599259144,98cyclictest9150irq/87-eth%d20:30:240
303387599259137,107cyclictest0-21swapper/022:41:480
303387599258160,85cyclictest3033874-21cyclictest21:11:340
303387599255152,87cyclictest0-21swapper/022:47:100
303387599255138,100cyclictest0-21swapper/022:52:180
303387599254149,90cyclictest3091264-21timerwakeupswit00:07:080
303387599254149,90cyclictest3091264-21timerwakeupswit00:07:080
303387599253148,88cyclictest0-21swapper/000:25:520
303387599253148,88cyclictest0-21swapper/000:25:510
303387599252165,48cyclictest14-21ksoftirqd/020:50:160
303387599252165,48cyclictest14-21ksoftirqd/020:50:160
303387599252143,96cyclictest3033874-21cyclictest22:55:130
303387599252139,97cyclictest0-21swapper/000:36:410
303387599252124,109cyclictest0-21swapper/020:35:480
303387599252124,109cyclictest0-21swapper/020:35:480
303387599252119,117cyclictest0-21swapper/020:21:590
303387599251146,87cyclictest0-21swapper/000:21:450
303387599251146,87cyclictest0-21swapper/000:21:450
303387599251133,103cyclictest0-21swapper/023:05:490
303387599251133,103cyclictest0-21swapper/023:05:490
303387599251128,107cyclictest0-21swapper/019:11:160
303387599250145,89cyclictest0-21swapper/020:12:030
303387599249144,88cyclictest0-21swapper/022:15:010
303387599248157,77cyclictest3083299-21/usr/sbin/munin23:30:150
303387599248157,77cyclictest3083299-21/usr/sbin/munin23:30:150
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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