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2026-07-10 - 00:11
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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 Jul 09, 2026 12:44:57)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)		T*(,W**)
latency
(µs)		CmdPIDPrioCmd
57995599145134,8cyclictest684957-21latency_hist12:35:020
57995599145134,8cyclictest684957-21latency_hist12:35:020
57995599145131,5cyclictest592673-21kworker/u8:1+events_unbound08:20:000
57995599131125,5cyclictest683415-21kworker/u8:1+events_unbound12:40:000
57995999127122,3cyclictest605918-21kworker/u8:3+events_unbound08:50:251
57995599126116,7cyclictest600640-21latency_hist08:15:010
57995599126112,10cyclictest1213033-21systemd-journal10:00:000
57995599122117,4cyclictest630122-21kworker/u8:3+events_unbound09:50:250
57995599122117,4cyclictest630122-21kworker/u8:3+events_unbound09:50:250
57995999121106,12cyclictest1213033-21systemd-journal11:10:001
57995999119107,9cyclictest621884-21apt-get09:20:001
57995599117108,7cyclictest670674-21kworker/u8:0+events_unbound12:25:250
57995599116110,4cyclictest617320-21kworker/u8:1+events_unbound09:05:240
57995599115107,3cyclictest636689-21kworker/u8:0+events_unbound10:15:240
57995599115104,9cyclictest643146-21cat10:25:010
57995599114106,6cyclictest567199-21kworker/u8:2+events_unbound07:15:230
5799559911399,7cyclictest592673-21kworker/u8:1+events_unbound08:20:180
57995599113108,4cyclictest620250-21kworker/u8:0+events_unbound09:30:240
57995999110105,4cyclictest636689-21kworker/u8:0+events_unbound10:10:241
57995599110104,4cyclictest653484-21kworker/u8:2+flush-179:010:55:240
57995599110100,7cyclictest599054-21latency_hist08:10:010
57995999109104,4cyclictest644706-21kworker/u8:3+events_unbound11:00:241
57995999109103,4cyclictest652590-21kworker/u8:1+events_unbound10:55:201
57995999106101,4cyclictest612081-21kworker/u8:2+flush-179:008:55:241
57995599106102,3cyclictest600622-21kworker/u8:0+flush-179:008:35:250
57995599106102,3cyclictest600622-21kworker/u8:0+flush-179:008:35:250
57995599106101,4cyclictest644706-21kworker/u8:3+events_unbound11:20:230
57995999105101,3cyclictest630059-21kworker/u8:1+events_unbound10:00:241
57995599105100,4cyclictest644706-21kworker/u8:3+events_unbound10:40:250
5799559910498,4cyclictest644706-21kworker/u8:3+flush-179:011:50:210
5799559910498,4cyclictest620250-21kworker/u8:0+flush-179:009:40:240
5799559910496,5cyclictest592725-21kworker/u8:3+events_unbound08:00:150
5799599910398,4cyclictest670674-21kworker/u8:0+events_unbound12:15:251
5799559910393,7cyclictest510-21rs:main0
5799559910194,5cyclictest605937-21apt-get08:30:110
5799599910096,3cyclictest644706-21kworker/u8:3+events_unbound11:20:221
5799599910090,7cyclictest678589-21latency_hist12:15:021
5799599910089,9cyclictest630334-21apt-get09:45:131
5799599910089,9cyclictest630334-21apt-get09:45:131
5799559910091,6cyclictest609112-21kworker/u8:1+events_unbound08:45:140
579955999991,6cyclictest636689-21kworker/u8:0+events_unbound10:05:140
579955999887,9cyclictest1213033-21systemd-journal11:05:000
579955999793,3cyclictest644706-21kworker/u8:3+flush-179:011:05:230
579959999691,4cyclictest636689-21kworker/u8:0+flush-179:010:30:201
579959999688,6cyclictest617084-21latency_hist09:05:011
579959999688,6cyclictest617084-21latency_hist09:05:011
579959999687,7cyclictest667513-21apt-key11:40:021
579959999686,7cyclictest633508-21latency_hist09:55:011
579959999686,7cyclictest633508-21latency_hist09:55:011
579955999692,3cyclictest644706-21kworker/u8:3+events_unbound11:15:240
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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