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2026-09-18 - 14:38
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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 Fri Sep 18, 2026 00:44:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)		T*(,W**)
latency
(µs)		CmdPIDPrioCmd
322788199168153,11cyclictest3321210-40mandb00:00:001
322787999151138,10cyclictest609153-21cups-browsed00:00:010
322787999139128,8cyclictest3271070-21latency_hist21:25:010
322787999132115,5cyclictest3224806-21kworker/u8:3+events_unbound19:20:010
322787999129119,8cyclictest3228441-21kworker/u8:1+events_unbound19:15:010
322787999128120,5cyclictest3245343-21kworker/u8:3+flush-179:020:30:150
322787999128117,8cyclictest3285906-21latency_hist22:10:000
322787999127118,7cyclictest3310429-21kworker/u8:0+flush-179:023:40:000
322787999126119,5cyclictest3245343-21kworker/u8:3+flush-179:021:15:000
322787999125119,4cyclictest3272639-21kworker/u8:0+flush-179:021:35:000
322787999122116,4cyclictest3321237-21kworker/u8:2+events_unbound00:10:190
322787999122112,7cyclictest3275851-21apt-get21:40:000
322787999121113,5cyclictest3272639-21kworker/u8:0+flush-179:021:40:030
322787999120115,2cyclictest191rcuc/021:05:010
322787999119113,4cyclictest3332407-21kworker/u8:1+flush-179:000:35:210
322787999119113,4cyclictest3332407-21kworker/u8:1+flush-179:000:35:210
322787999118112,5cyclictest3245343-21kworker/u8:3+flush-179:021:05:240
322787999118112,5cyclictest3245343-21kworker/u8:3+flush-179:021:05:240
322787999118108,8cyclictest3254876-21kworker/u8:0+events_unbound20:45:150
322788199117108,6cyclictest3251714-21latency_hist20:25:001
322787999117109,5cyclictest3321237-21kworker/u8:2+flush-179:000:05:230
322787999117108,6cyclictest3321237-21kworker/u8:2+flush-179:000:30:200
322787999116108,5cyclictest3298671-21kworker/u8:1+flush-179:022:55:240
322787999116106,7cyclictest3245343-21kworker/u8:3+events_unbound20:25:170
322788199115104,7cyclictest3279295-21apt-get21:50:001
322788199115104,7cyclictest3279295-21apt-get21:50:001
322787999115109,4cyclictest3281160-21kworker/u8:3+flush-179:022:00:170
322787999115108,4cyclictest3245343-21kworker/u8:3+flush-179:020:10:200
322787999115107,6cyclictest3234131-21kworker/u8:0+flush-179:019:30:240
322787999114109,4cyclictest3245343-21kworker/u8:3+events_unbound20:20:010
322787999114105,6cyclictest3300223-21latency_hist22:55:010
322787999114104,7cyclictest3237581-21kworker/u8:2+events_unbound19:55:190
322787999113100,10cyclictest1213033-21systemd-journal23:10:000
322788199112102,8cyclictest3321237-21kworker/u8:2+events_unbound00:03:591
322787999112107,4cyclictest3245343-21kworker/u8:3+flush-179:021:15:250
322787999111104,4cyclictest3239922-21kworker/u8:1+events_unbound20:05:160
322787999110103,5cyclictest3303453-21kworker/u8:2+events_unbound23:20:250
32278819910896,9cyclictest3327606-21latency_hist00:20:001
32278799910898,7cyclictest3234149-21latency_hist19:30:010
322787999108102,4cyclictest3234131-21kworker/u8:0+events_unbound19:35:240
322787999108101,5cyclictest3245343-21kworker/u8:3+events_unbound21:25:220
32278799910798,6cyclictest3324407-21kworker/u8:0+events_unbound00:20:150
32278819910698,6cyclictest3297308-21apt-get22:45:121
32278799910699,6cyclictest3303450-21kworker/u8:0+flush-179:023:05:010
32278799910697,7cyclictest3237581-21kworker/u8:2+flush-179:019:45:000
32278799910696,8cyclictest510-21rs:main0
32278799910599,4cyclictest3228441-21kworker/u8:1+flush-179:019:20:140
322787999105100,3cyclictest3298671-21kworker/u8:1+flush-179:023:30:250
32278799910498,4cyclictest3295436-21kworker/u8:3+events_unbound22:40:180
32278799910493,5cyclictest3248505-21kworker/u8:2+events_unbound20:20:140
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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