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2026-06-22 - 17:09
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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 Mon Jun 22, 2026 12:44:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)		T*(,W**)
latency
(µs)		CmdPIDPrioCmd
68529399159149,7cyclictest787243-21apt-get12:21:530
68529399133122,7cyclictest769693-21latency_hist11:30:020
68529399129117,9cyclictest737173-21kworker/u8:0+flush-179:010:05:010
68529599122113,7cyclictest678889-21kworker/u8:1+events_unbound07:15:001
68529599121108,4cyclictest763317-21kworker/u8:3+events_unbound11:20:011
68529399120111,7cyclictest753579-21kworker/u8:3+events_unbound10:50:000
68529599118113,4cyclictest743326-21kworker/u8:1+events_unbound10:20:011
68529399117110,5cyclictest685248-21kworker/u8:3+flush-179:007:25:010
68529399115106,6cyclictest761737-21latency_hist11:05:010
68529599113105,6cyclictest771255-21kworker/u8:1+events_unbound12:00:001
68529399112103,7cyclictest696986-21kworker/u8:2+events_unbound07:55:010
68529599109101,6cyclictest790512-21kworker/u8:0+events_unbound12:35:001
68529599106100,4cyclictest790513-21kworker/u8:2+events_unbound12:35:131
6852939910694,10cyclictest1213033-21systemd-journal12:20:000
6852939910694,10cyclictest1213033-21systemd-journal12:20:000
6852959910494,8cyclictest717065-21kworker/u8:1+flush-179:009:20:181
6852959910397,4cyclictest756939-21kworker/u8:2+events_unbound11:40:221
6852959910395,5cyclictest696986-21kworker/u8:2+events_unbound07:55:041
6852939910395,5cyclictest751358-21kworker/u8:2+events_unbound10:40:130
6852939910393,7cyclictest716579-21apt-get08:45:000
6852939910296,4cyclictest740684-21kworker/u8:2+events_unbound10:00:010
6852939910293,6cyclictest771255-21kworker/u8:1+flush-179:012:10:230
6852939910195,4cyclictest758571-21kworker/u8:0+events_unbound11:10:010
6852939910192,6cyclictest758571-21kworker/u8:0+flush-179:011:10:200
6852959910095,4cyclictest740768-21kworker/u8:3+events_unbound10:20:241
6852939910095,3cyclictest678889-21kworker/u8:1+events_unbound07:35:220
6852939910092,6cyclictest708059-21kworker/u8:3+events_unbound08:15:230
6852939910088,5cyclictest708059-21kworker/u8:3+flush-179:009:35:200
685295999988,5cyclictest756939-21kworker/u8:2+events_unbound12:05:001
685293999992,5cyclictest737173-21kworker/u8:0+events_unbound09:55:010
685293999990,6cyclictest756939-21kworker/u8:2+events_unbound11:55:200
685293999990,6cyclictest743326-21kworker/u8:1+events_unbound10:15:240
685295999891,5cyclictest685248-21kworker/u8:3+events_unbound07:50:231
685293999890,5cyclictest721610-21latency_hist09:00:010
685295999789,6cyclictest750314-21kworker/u8:1+flush-179:010:30:211
685293999791,4cyclictest723904-21kworker/u8:0+events_unbound09:15:240
685293999790,5cyclictest713629-21apt-get08:35:120
685293999789,6cyclictest696986-21kworker/u8:2+events_unbound07:55:250
685295999689,6cyclictest685248-21kworker/u8:3+flush-179:007:20:011
685293999689,5cyclictest717065-21kworker/u8:1+flush-179:008:50:250
685293999689,4cyclictest678889-21kworker/u8:1+events_unbound07:40:120
685295999589,4cyclictest685248-21kworker/u8:3+events_unbound07:45:011
685293999487,6cyclictest771255-21kworker/u8:1+flush-179:011:45:230
685293999486,6cyclictest790513-21kworker/u8:2+events_unbound12:40:010
685293999484,7cyclictest710199-21latency_hist08:25:010
685293999482,10cyclictest693472-21apt-get07:35:010
685295999387,4cyclictest768090-21kworker/u8:0+events_unbound11:35:231
685295999387,4cyclictest685248-21kworker/u8:3+flush-179:007:40:001
685295999385,6cyclictest787203-21kworker/u8:1+events_unbound12:25:011
685295999385,6cyclictest717065-21kworker/u8:1+flush-179:009:15:141
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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