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2026-08-13 - 16:21
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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 Aug 13, 2026 12:44:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)		T*(,W**)
latency
(µs)		CmdPIDPrioCmd
329685099126110,13cyclictest1213033-21systemd-journal12:05:011
329684899126115,8cyclictest1213033-21systemd-journal09:55:000
329685099123112,8cyclictest3361726-21latency_hist10:30:011
329685099121111,7cyclictest3390927-21latency_hist12:00:001
329685099119113,4cyclictest3392482-21kworker/u8:1+events_unbound12:20:141
329684899118108,8cyclictest3326181-21latency_hist08:40:000
32968509911794,21cyclictest3392482-21kworker/u8:1+flush-179:012:15:001
32968509911794,21cyclictest3392482-21kworker/u8:1+flush-179:012:14:591
329685099117108,7cyclictest3301754-21latency_hist07:25:001
329685099113102,8cyclictest3396175-21/usr/sbin/munin12:15:251
329685099113100,10cyclictest1213033-21systemd-journal07:55:011
329685099111104,5cyclictest3296723-21kworker/u8:1+flush-179:008:05:221
329685099111104,5cyclictest3296723-21kworker/u8:1+flush-179:008:05:211
329685099108101,5cyclictest3366744-21/usr/sbin/munin10:45:241
329685099106100,4cyclictest3397500-21kworker/u8:0+events_unbound12:35:231
32968509910596,6cyclictest3340750-21/usr/sbin/munin09:25:231
32968489910592,10cyclictest1213033-21systemd-journal08:35:010
32968509910494,8cyclictest3318188-21kworker/u8:2+flush-179:008:20:011
32968489910492,9cyclictest3351657-21latency_hist10:00:010
32968489910394,6cyclictest3354134-21kworker/u8:2+flush-179:010:40:260
32968489910390,10cyclictest1213033-21systemd-journal09:30:220
32968509910294,6cyclictest3369938-21latency_hist10:55:011
32968509910195,4cyclictest3384583-21kworker/u8:0+flush-179:011:50:011
32968509910191,8cyclictest3323248-21apt-get08:30:111
3296850999786,8cyclictest3343686-21latency_hist09:35:011
3296850999589,4cyclictest3321438-21kworker/u8:1+events_unbound09:55:181
3296850999582,11cyclictest3321438-21kworker/u8:1+events_unbound09:45:011
3296850999459,33cyclictest714-21Xorg11:37:581
3296850999388,4cyclictest3319838-21kworker/u8:0+events_unbound08:20:361
3296850999284,6cyclictest3354134-21kworker/u8:2+flush-179:010:45:011
3296850999186,4cyclictest3305423-21kworker/u8:3+events_unbound07:36:441
3296848999180,8cyclictest3305442-21apt-get07:35:110
3296850998984,4cyclictest3334178-21kworker/u8:2+events_unbound09:22:501
3296850998984,3cyclictest3321438-21kworker/u8:1+flush-179:009:35:261
3296850998982,5cyclictest3327809-21kworker/u8:3+flush-179:008:50:001
3296850998980,5cyclictest3334178-21kworker/u8:2+flush-179:010:00:021
3296848998878,8cyclictest3381591-21/usr/sbin/munin11:30:160
3296850998782,4cyclictest3374765-21kworker/u8:0+events_unbound11:29:571
3296850998779,6cyclictest3327809-21kworker/u8:3+flush-179:009:15:161
3296850998774,10cyclictest3355097-21latency_hist10:10:011
3296848998778,7cyclictest3321438-21kworker/u8:1+flush-179:009:05:000
3296850998681,4cyclictest3308449-21kworker/u8:0+events_unbound07:51:431
3296848998680,4cyclictest3321438-21kworker/u8:1+flush-179:010:00:260
3296850998580,4cyclictest3402296-21kworker/u8:1+events_unbound12:34:501
3296850998580,4cyclictest3334178-21kworker/u8:2+events_unbound09:14:561
3296850998580,4cyclictest3327809-21kworker/u8:3+events_unbound08:54:521
3296850998574,9cyclictest1213033-21systemd-journal07:30:001
3296850998479,4cyclictest3321438-21kworker/u8:1+events_unbound08:25:431
3296848998477,5cyclictest3321438-21kworker/u8:1+flush-179:008:50:010
3296848998476,6cyclictest3321438-21kworker/u8:1+flush-179:009:40:260
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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