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2026-07-30 - 04:32
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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 Wed Jul 29, 2026 12:44:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)		T*(,W**)
latency
(µs)		CmdPIDPrioCmd
27943999141132,5cyclictest374677-21kworker/u8:3+flush-179:012:30:000
27943999131120,8cyclictest340908-21kworker/u8:2+flush-179:010:20:000
27944399129116,10cyclictest1213033-21systemd-journal11:15:001
27944399126117,6cyclictest374643-21latency_hist12:05:011
27944399126114,9cyclictest317053-21latency_hist09:05:001
27944399124116,6cyclictest288877-21kworker/u8:2+events_unbound08:00:001
27944399122114,5cyclictest281475-21kworker/u8:0+flush-179:007:30:171
27943999121112,6cyclictest342524-21kworker/u8:1+flush-179:010:25:200
27943999121108,11cyclictest300349-21apt-get08:15:000
27944399117109,5cyclictest374677-21kworker/u8:3+flush-179:012:30:281
27943999117109,6cyclictest342569-21kworker/u8:3+flush-179:010:40:010
27944399116109,5cyclictest295814-21kworker/u8:0+flush-179:008:15:001
27943999115109,4cyclictest288877-21kworker/u8:2+events_unbound07:44:590
27944399114105,6cyclictest361885-21kworker/u8:2+events_unbound11:35:261
27943999114105,7cyclictest305641-21latency_hist08:30:020
27943999113106,5cyclictest345741-21kworker/u8:0+events_unbound10:45:240
27944399111102,7cyclictest355532-21latency_hist11:05:011
27944399110101,6cyclictest374677-21kworker/u8:3+flush-179:012:35:241
27943999110103,5cyclictest361884-21kworker/u8:1+events_unbound12:05:140
27943999108103,4cyclictest277819-21kworker/u8:1+flush-179:007:20:010
27943999108103,4cyclictest277819-21kworker/u8:1+flush-179:007:20:000
27943999108102,4cyclictest311993-21kworker/u8:2+events_unbound08:50:000
2794439910796,8cyclictest510-21rs:main1
2794439910596,6cyclictest292158-21kworker/u8:3+flush-179:008:20:261
2794439910496,5cyclictest360573-21apt-get11:20:151
2794399910396,4cyclictest334813-21kworker/u8:0+events_unbound10:20:150
2794439910297,4cyclictest371489-21kworker/u8:0+flush-179:012:10:261
2794439910297,4cyclictest371489-21kworker/u8:0+flush-179:012:10:261
2794399910193,5cyclictest295814-21kworker/u8:0+flush-179:008:15:200
2794439910092,5cyclictest371489-21kworker/u8:0+events_unbound12:15:251
2794439910091,6cyclictest350637-21kworker/u8:3+flush-179:010:55:191
279443999992,5cyclictest323400-21kworker/u8:0+flush-179:009:25:241
279439999992,5cyclictest323400-21kworker/u8:0+events_unbound09:25:230
279439999990,7cyclictest310403-21kworker/u8:1+events_unbound08:45:010
279439999987,8cyclictest306181-21kworker/u8:2+flush-179:008:30:200
279443999892,4cyclictest310403-21kworker/u8:1+flush-179:008:45:241
279443999891,5cyclictest361885-21kworker/u8:2+flush-179:011:45:281
279439999890,5cyclictest320213-21kworker/u8:3+flush-179:009:20:160
279439999876,12cyclictest295814-21kworker/u8:0+flush-179:008:05:250
279443999789,5cyclictest374677-21kworker/u8:3+events_unbound12:25:181
279443999788,5cyclictest371489-21kworker/u8:0+flush-179:012:05:201
279439999791,4cyclictest320213-21kworker/u8:3+flush-179:009:45:220
279443999688,5cyclictest350637-21kworker/u8:3+events_unbound11:15:201
279439999690,4cyclictest350637-21kworker/u8:3+flush-179:011:15:220
279443999589,4cyclictest342524-21kworker/u8:1+events_unbound10:30:151
279443999587,5cyclictest277819-21kworker/u8:1+flush-179:007:40:131
279443999585,7cyclictest361884-21kworker/u8:1+flush-179:011:50:201
279439999583,10cyclictest1213033-21systemd-journal10:10:000
279439999487,5cyclictest310403-21kworker/u8:1+flush-179:008:55:000
279439999486,6cyclictest352336-21latency_hist10:55:010
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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