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2026-04-03 - 23:44
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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 Apr 03, 2026 12:44:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)		T*(,W**)
latency
(µs)		CmdPIDPrioCmd
2921710999990,6cyclictest2915553-21kworker/u8:2+flush-179:007:15:010
2921714999889,7cyclictest2959064-21latency_hist09:05:011
2921714999889,7cyclictest2924770-21latency_hist07:20:011
2921710999382,9cyclictest2942560-21apt-get08:11:000
2921710999080,7cyclictest2944232-21latency_hist08:20:010
2921710998879,7cyclictest2951098-21latency_hist08:40:020
2921714998778,6cyclictest3012109-21latency_hist11:50:011
2921710998475,7cyclictest3007309-21kworker/u8:2+flush-179:011:40:010
2921714998375,6cyclictest2929541-21latency_hist07:35:021
2921714998369,11cyclictest266-21systemd-journal11:05:001
2921714998174,5cyclictest2936190-21latency_hist07:55:011
2921710998174,5cyclictest2946325-21kworker/u8:2+events_unbound08:30:010
2921714998075,4cyclictest2957519-21kworker/u8:3+events_unbound09:20:251
2921710997971,6cyclictest3010526-21latency_hist11:45:010
2921714997768,6cyclictest2949716-21cp08:35:021
2921714997666,8cyclictest2985060-21apt-get10:25:111
2921710997569,5cyclictest3007368-21kworker/u8:3+flush-179:012:20:010
2921714997470,3cyclictest2957519-21kworker/u8:3+events_unbound09:19:561
2921714997368,4cyclictest3007309-21kworker/u8:2+events_unbound11:59:351
2921714997261,9cyclictest2952951-21apt-get08:45:091
2921710997162,7cyclictest266-21systemd-journal12:00:010
2921710997161,8cyclictest2998048-21apt-get11:05:100
2921714997066,3cyclictest2966503-21kworker/u8:0+events_unbound09:31:441
2921714997061,3cyclictest3023491-21kworker/u8:1+events_unbound12:30:171
2921710997062,6cyclictest2976564-21latency_hist10:00:010
2921710997062,6cyclictest2921555-21latency_hist07:10:010
2921714996965,3cyclictest3007309-21kworker/u8:2+events_unbound12:08:471
2921714996965,3cyclictest3007309-21kworker/u8:2+events_unbound11:33:441
2921714996965,3cyclictest2960685-21kworker/u8:0+events_unbound09:12:431
2921714996964,4cyclictest2986368-21kworker/u8:0+events_unbound10:44:291
2921710996961,6cyclictest2970469-21apt-get09:40:120
2921714996864,3cyclictest2946325-21kworker/u8:2+events_unbound08:33:431
2921714996863,4cyclictest2954308-21kworker/u8:1+events_unbound09:06:451
2921714996863,4cyclictest2954308-21kworker/u8:1+events_unbound09:06:441
2921714996858,4cyclictest2986368-21kworker/u8:0+events_unbound10:45:231
2921710996859,7cyclictest266-21systemd-journal10:23:010
2921710996859,7cyclictest266-21systemd-journal10:23:010
2921714996763,3cyclictest3007309-21kworker/u8:2+events_unbound12:04:341
2921714996763,3cyclictest2970257-21kworker/u8:3+events_unbound09:46:431
2921714996762,4cyclictest3007309-21kworker/u8:2+events_unbound12:10:461
2921714996662,3cyclictest2954308-21kworker/u8:1+events_unbound08:59:571
2921714996661,4cyclictest2972461-21kworker/u8:0+events_unbound10:11:431
2921710996656,8cyclictest2957730-21apt-get09:00:110
2921714996561,3cyclictest2924737-21kworker/u8:0+events_unbound07:28:441
2921714996561,3cyclictest2915553-21kworker/u8:2+events_unbound07:14:571
2921714996460,3cyclictest2973363-21kworker/u8:2+events_unbound09:54:581
2921714996460,3cyclictest2931228-21kworker/u8:3+events_unbound07:57:441
2921714996453,9cyclictest510-21rs:main1
2921714996453,9cyclictest2954537-21apt-get08:50:121
2921714996359,3cyclictest3005720-21kworker/u8:1+events_unbound11:29:321
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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