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2025-12-11 - 20:53
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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 Thu Dec 11, 2025 12:44:55)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)		T*(,W**)
latency
(µs)		CmdPIDPrioCmd
320475999691,4cyclictest361408-21kworker/u8:1+events_unbound09:25:240
320475999489,4cyclictest418649-21kworker/u8:1+events_unbound12:30:240
320475998979,7cyclictest413593-21latency_hist12:00:010
320475998883,4cyclictest345917-21kworker/u8:0+events_unbound08:30:240
320475998479,4cyclictest404077-21kworker/u8:3+events_unbound11:35:280
320475998371,9cyclictest341391-21/usr/sbin/munin08:15:240
320475997969,7cyclictest410400-21latency_hist11:50:000
320476997868,7cyclictest415184-21latency_hist12:05:011
320476997868,7cyclictest415184-21latency_hist12:05:011
320475997868,7cyclictest421810-21latency_hist12:25:010
320475997868,7cyclictest421810-21latency_hist12:25:010
320475997773,3cyclictest400825-21kworker/u8:2+events_unbound11:30:260
320475997766,9cyclictest352304-21latency_hist08:50:020
320475997766,9cyclictest352304-21latency_hist08:50:020
320475997571,3cyclictest365543-21kworker/u8:0+events_unbound10:00:220
320475997565,7cyclictest399248-21latency_hist11:15:010
320476997262,7cyclictest386255-21latency_hist10:35:001
320475997265,5cyclictest338219-21/usr/sbin/munin08:05:200
320476997163,6cyclictest334785-21latency_hist07:55:011
320476997162,5cyclictest367136-21kworker/u8:1+flush-179:009:40:001
320476997160,8cyclictest375113-21latency_hist10:00:011
320475997059,8cyclictest271-21systemd-journal08:45:010
4670791690,32ptp4l61690irq/136-eno1-TxRx-007:07:003
320475996864,3cyclictest345917-21kworker/u8:0+events_unbound09:00:150
320475996863,4cyclictest415224-21kworker/u8:3+flush-179:012:05:300
320476996655,9cyclictest421821-21apt-get12:25:001
320476996655,9cyclictest421821-21apt-get12:25:001
320476996650,14cyclictest425501-21apt-get12:35:151
320475996662,3cyclictest367136-21kworker/u8:1+events_unbound09:35:190
320480996561,3cyclictest0-21swapper/210:28:592
320476996555,8cyclictest362113-21latency_hist09:20:011
320475996561,3cyclictest381732-21kworker/u8:0+events_unbound11:00:230
320475996556,3cyclictest365543-21kworker/u8:0+events_unbound09:32:300
320475996459,4cyclictest389482-21kworker/u8:1+events_unbound10:45:250
320475996452,9cyclictest387869-21latency_hist10:40:000
320475996359,3cyclictest391699-21kworker/u8:2+events_unbound10:55:230
320483996259,2cyclictest0-21swapper/310:34:593
320475996254,6cyclictest396073-21apt-get11:05:120
320475996254,3cyclictest322068-21kworker/u8:1+flush-179:007:20:160
320475996157,3cyclictest318933-21kworker/u8:2+flush-179:007:14:570
320475996157,3cyclictest318933-21kworker/u8:2+flush-179:007:14:560
320483995957,1cyclictest0-21swapper/312:01:593
320483995957,1cyclictest0-21swapper/312:01:593
320483995957,1cyclictest0-21swapper/311:42:593
320476995943,14cyclictest271-21systemd-journal09:00:281
320475995954,3cyclictest723-21Xorg10:42:590
320475995951,6cyclictest333224-21kworker/u8:1+flush-179:008:15:000
320476995847,7cyclictest411966-21kworker/u8:2+flush-179:012:00:011
320475995853,4cyclictest381732-21kworker/u8:0+flush-179:011:50:270
320476995747,7cyclictest418613-21latency_hist12:15:011
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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