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2026-08-01 - 22:45
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 Sat Aug 01, 2026 12:44:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)		T*(,W**)
latency
(µs)		CmdPIDPrioCmd
9055899161150,8cyclictest178649-21latency_hist11:45:011
9055899148135,9cyclictest121058-21latency_hist08:45:021
90554991340,131cyclictest1-21systemd07:15:000
9055499133125,5cyclictest179146-21kworker/u8:3+flush-179:012:40:000
9055499130124,4cyclictest83890-21kworker/u8:3+flush-179:007:45:000
9055499130122,5cyclictest114669-21kworker/u8:0+events_unbound08:45:140
9055499127118,6cyclictest151819-21kworker/u8:1+flush-179:010:50:010
9055499125118,4cyclictest150004-21kworker/u8:3+events_unbound10:20:020
9055499124115,7cyclictest136959-21kworker/u8:1+flush-179:009:40:010
90554991200,115cyclictest1-21systemd07:25:000
9055499116107,7cyclictest175430-21kworker/u8:1+events_unbound11:40:010
9055499116107,7cyclictest175430-21kworker/u8:1+events_unbound11:40:010
9055499113108,4cyclictest151819-21kworker/u8:1+events_unbound10:45:010
9055499113108,3cyclictest93640-21latency_hist07:20:010
9055499112102,7cyclictest110142-21/usr/sbin/munin08:10:250
9055899111102,6cyclictest172284-21latency_hist11:25:011
9055899111100,8cyclictest190058-21latency_hist12:20:011
9055499109103,4cyclictest114669-21kworker/u8:0+flush-179:008:25:000
9055499109100,6cyclictest186864-21latency_hist12:10:010
905589910799,5cyclictest151819-21kworker/u8:1+flush-179:010:50:261
905589910597,5cyclictest114669-21kworker/u8:0+flush-179:008:40:011
905589910495,6cyclictest183678-21latency_hist12:00:001
905589910395,6cyclictest164306-21latency_hist11:00:011
905549910396,5cyclictest105373-21kworker/u8:1+events_unbound07:55:180
905549910391,9cyclictest98402-21latency_hist07:35:000
905549910296,4cyclictest183735-21kworker/u8:2+flush-179:012:15:000
905549910295,6cyclictest132258-21kworker/u8:3+events_unbound09:25:000
905549910290,9cyclictest103790-21apt-get07:50:130
905549910091,6cyclictest90418-21latency_hist07:10:020
905549910090,7cyclictest122622-21kworker/u8:3+flush-179:008:55:160
90558999790,5cyclictest71610-21kworker/u8:1+events_unbound07:15:011
90554999788,6cyclictest117863-21latency_hist08:35:010
90558999686,7cyclictest179146-21kworker/u8:3+flush-179:012:25:241
90558999686,7cyclictest108315-21latency_hist08:05:021
90554999488,4cyclictest179146-21kworker/u8:3+flush-179:012:25:160
90554999487,5cyclictest170644-21kworker/u8:0+events_unbound11:35:010
90554999383,7cyclictest135381-21kworker/u8:0+flush-179:009:45:240
90554999286,4cyclictest151819-21kworker/u8:1+flush-179:011:15:150
90558999181,6cyclictest114669-21kworker/u8:0+flush-179:008:25:181
90558999179,4cyclictest109883-21kworker/u8:0+flush-179:008:15:001
90554999184,4cyclictest127415-21kworker/u8:1+events_unbound09:10:140
90554999180,8cyclictest1213033-21systemd-journal08:30:000
90554999082,5cyclictest179146-21kworker/u8:3+flush-179:012:00:140
90558998980,6cyclictest145212-21latency_hist10:00:021
90554998984,4cyclictest156361-21kworker/u8:3+events_unbound10:35:000
90554998983,4cyclictest183652-21kworker/u8:1+flush-179:012:00:010
90554998976,7cyclictest151819-21kworker/u8:1+events_unbound10:50:170
90554998879,7cyclictest173865-21latency_hist11:30:010
90554998876,9cyclictest126096-21apt-get09:00:120
90558998780,5cyclictest105373-21kworker/u8:1+flush-179:008:20:241
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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