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2025-12-12 - 10:52
OSADL QA Farm

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of system in rack #e, slot #6

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 50 highest latencies:
System rackeslot6.osadl.org (updated Fri Dec 12, 2025 00:44:55)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)		T*(,W**)
latency
(µs)		CmdPIDPrioCmd
16802779910392,8cyclictest1690123-21latency_hist19:40:011
1680272999689,5cyclictest1756924-21kworker/u8:2+flush-179:023:25:260
1680272999386,5cyclictest1738862-21kworker/u8:3+flush-179:022:20:000
1680272999386,5cyclictest1738862-21kworker/u8:3+flush-179:022:20:000
1680277998675,8cyclictest1750575-21latency_hist22:45:001
1680272998472,10cyclictest1685191-21cp19:25:010
1680272998472,10cyclictest1685191-21cp19:25:010
1680277998271,8cyclictest1761981-21latency_hist23:20:011
1680277998172,7cyclictest1779787-21kworker/u8:0+flush-179:000:20:011
1680277998069,8cyclictest1701245-21latency_hist20:15:021
1680277997869,7cyclictest1721367-21/usr/sbin/munin21:15:261
1680277997669,5cyclictest1727737-21kworker/u8:1+flush-179:022:00:001
1680272997569,4cyclictest1774772-21kworker/u8:0+events_unbound00:00:190
1680272997468,4cyclictest1707862-21kworker/u8:3+events_unbound20:45:000
1680272997468,4cyclictest1707862-21kworker/u8:3+events_unbound20:44:590
1680277997261,9cyclictest271-21systemd-journal00:40:001
1680272997263,7cyclictest1737578-21latency_hist22:05:000
1680277997163,5cyclictest1738862-21kworker/u8:3+events_unbound22:35:241
1680277997162,7cyclictest1693289-21latency_hist19:50:011
1680272997167,3cyclictest1702900-21kworker/u8:2+flush-179:020:40:010
1680277996958,9cyclictest1704459-21apt-get20:25:001
1680272996964,4cyclictest1686969-21kworker/u8:3+events_unbound20:00:010
1680272996964,3cyclictest1748929-21kworker/u8:1+flush-179:022:45:230
1680277996858,7cyclictest1741010-21latency_hist22:15:011
1680277996855,12cyclictest1674679-21kworker/u8:1+events_unbound19:20:261
1680277996855,12cyclictest1674679-21kworker/u8:1+events_unbound19:20:251
1680272996858,7cyclictest1714501-21latency_hist20:55:000
1680277996760,4cyclictest1709520-21kworker/u8:1+flush-179:021:00:011
1680277996758,7cyclictest1691704-21latency_hist19:45:001
1680272996762,4cyclictest1686969-21kworker/u8:3+flush-179:020:05:250
1680272996754,5cyclictest1696442-21kworker/u8:1+events_unbound20:15:240
1680277996660,4cyclictest1756924-21kworker/u8:2+flush-179:023:25:161
1680272996660,4cyclictest1779844-21kworker/u8:2+flush-179:000:35:260
1680272996660,4cyclictest1681917-21kworker/u8:2+events_unbound19:30:250
168028499640,62cyclictest0-21swapper/323:39:583
1680272996453,8cyclictest1771527-21latency_hist23:50:010
1680272996453,4cyclictest1724068-21kworker/u8:2+events_unbound21:50:010
1680280996359,3cyclictest0-21swapper/222:21:592
168028099630,61cyclictest0-21swapper/223:39:592
1680277996354,4cyclictest1724068-21kworker/u8:2+events_unbound22:15:181
1680277996354,4cyclictest1724068-21kworker/u8:2+events_unbound22:15:171
1680272996359,3cyclictest1713152-21kworker/u8:0+flush-179:021:19:550
1680272996353,7cyclictest271-21systemd-journal00:00:000
4670791620,9ptp4l61690irq/136-eno1-TxRx-019:09:583
1680284996259,1cyclictest0-21swapper/322:22:003
1680277996154,4cyclictest1746030-21kworker/u8:1+events_unbound22:30:181
1680272996156,4cyclictest1709520-21kworker/u8:1+events_unbound20:55:240
1680272996056,3cyclictest1696442-21kworker/u8:1+flush-179:020:30:010
1680272996053,6cyclictest1724068-21kworker/u8:2+events_unbound21:35:250
1680277995956,2cyclictest0-21swapper/123:38:001
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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