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2026-05-11 - 05:19

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #2, slot #7

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 rack2slot7s.osadl.org (updated Mon May 11, 2026 00:43:08)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
69058997147,20cyclictest0-21swapper/122:30:581
69058995544,8cyclictest254735-21latency_hist00:15:021
69058995544,8cyclictest254735-21latency_hist00:15:021
69059995141,5cyclictest0-21swapper/200:30:012
69059994839,6cyclictest242551-21cups-browsed00:10:432
69059994839,6cyclictest242551-21cups-browsed00:10:432
69058994835,4cyclictest0-21swapper/121:55:561
69059994740,4cyclictest100553-21kworker/u8:6-xprtiod21:20:012
69059994738,6cyclictest2469968-21cups-browsed23:40:502
69059994738,6cyclictest2469968-21cups-browsed23:40:502
69058994638,5cyclictest223703-21uname23:35:491
69057994639,4cyclictest178085-21basename22:40:000
69057994639,4cyclictest1051-21mta-sts-daemon21:00:000
69059994537,5cyclictest131388-21unixbench_singl21:41:032
69058994536,6cyclictest421-21dbus-daemon20:45:011
69059994436,3cyclictest0-21swapper/221:10:562
69059994435,6cyclictest127217-21unixbench_multi21:36:022
69059994435,4cyclictest0-21swapper/223:25:012
69059994434,7cyclictest183849-21xargs22:46:022
69058994437,3cyclictest0-21swapper/122:40:011
69058994432,9cyclictest151276-21sshd22:05:541
69059994335,4cyclictest0-21swapper/200:16:022
69059994331,5cyclictest0-21swapper/222:20:522
69057994337,3cyclictest12350irq/32-eth022:10:510
69059994235,4cyclictest695-21cron19:25:012
69058994233,6cyclictest113191-21systemd-run21:20:011
69058994233,5cyclictest270771-21ssh00:35:011
6905899422,31cyclictest256115-21ssh00:16:011
69059994133,5cyclictest178706-21sh22:40:382
69058994135,3cyclictest0-21swapper/100:20:511
69058994131,6cyclictest2469968-21cups-browsed21:27:051
69058994130,6cyclictest228207-21/usr/sbin/munin23:41:091
69058994130,6cyclictest228207-21/usr/sbin/munin23:41:091
69057994135,4cyclictest218477-21ssh23:30:020
69057994133,5cyclictest1-21systemd23:59:590
69057994130,7cyclictest194232-21cut23:00:010
69057994121,16cyclictest183632-21ssh22:45:580
69059994033,3cyclictest0-21swapper/220:05:012
69059994033,3cyclictest0-21swapper/220:05:012
69059994032,5cyclictest105033-21diskmemload23:40:012
69059994031,6cyclictest118216-21kernelversion21:25:452
69058994031,5cyclictest105038-21munin-plugin-st21:10:001
69058994031,4cyclictest0-21swapper/121:10:481
69057994029,6cyclictest12350irq/32-eth022:50:540
69059993930,6cyclictest2469968-21cups-browsed21:25:012
69058993933,4cyclictest69056-21cyclictest23:05:581
69058993931,5cyclictest73545-21cron19:25:011
69058993931,5cyclictest137618-21systemd-run21:50:011
69059993831,3cyclictest0-21swapper/223:31:012
69059993829,4cyclictest0-21swapper/223:05:012
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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