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2026-04-25 - 03:34

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 Sat Apr 25, 2026 00:43:16)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2217057996254,5cyclictest2289210-21sh21:55:011
2217057996254,5cyclictest2289210-21sh21:55:011
2217057996051,6cyclictest2325490-21munin-run22:40:011
2217056995644,6cyclictest2247991-21sshd20:50:430
2217057995546,6cyclictest411063-21cups-browsed20:00:411
2217057995344,6cyclictest2406116-21idleruntime-cro00:20:011
2217057995142,5cyclictest2232040-21sendmail20:00:011
2217057995140,7cyclictest2299017-21/usr/sbin/munin22:05:531
2217056995130,11cyclictest151ktimers/022:45:500
2217056995130,11cyclictest151ktimers/022:45:500
221705799494,34cyclictest2302499-21ssh22:10:401
2217057994939,6cyclictest2224561-21systemd-run19:35:011
2217056994839,6cyclictest2386486-21aten_r2power_en23:55:320
2217056994720,19cyclictest12350irq/32-eth021:45:450
2217057994632,9cyclictest420-21avahi-daemon23:38:191
2217058994539,3cyclictest0-21swapper/200:00:012
2217057994434,6cyclictest421-21dbus-daemon20:40:011
2217057994434,6cyclictest2262610-21proc_pri21:20:461
2217057994427,12cyclictest420-21avahi-daemon21:15:471
2217058994337,4cyclictest2328332-21kworker/u8:2-rpciod22:50:362
2217058994336,4cyclictest2361782-21systemd-run23:25:022
2217058994336,4cyclictest2361782-21systemd-run23:25:022
2217058994335,5cyclictest2394029-21ls00:05:002
2217057994334,6cyclictest2420078-21unixbench_singl00:35:541
2217057994334,6cyclictest2420078-21unixbench_singl00:35:541
2217056994335,5cyclictest421-21dbus-daemon22:25:010
221705699431,40cyclictest2400902-21kworker/u8:12+rpciod00:25:440
2217058994136,2cyclictest0-21swapper/221:25:022
2217058994135,3cyclictest0-21swapper/200:15:422
2217058994133,5cyclictest2375692-21tail23:40:542
2217058994133,5cyclictest2232075-21latency_hist20:00:022
2217057994134,4cyclictest0-21swapper/100:05:421
2217057994133,3cyclictest0-21swapper/121:35:011
221705799413,30cyclictest411063-21cups-browsed21:25:411
2217057994129,8cyclictest421-21dbus-daemon00:30:361
221705799410,34cyclictest2399264-21ssh00:10:411
2217058994032,5cyclictest421-21dbus-daemon23:35:012
2217057994034,3cyclictest0-21swapper/120:45:491
2217057994033,3cyclictest0-21swapper/123:55:011
2217057994030,7cyclictest2351218-21ssh23:10:501
2217057994028,8cyclictest420-21avahi-daemon23:31:091
221705799402,26cyclictest2391404-21ssh00:00:481
2217056994033,4cyclictest2238069-21systemd-run20:20:010
2217056994031,6cyclictest421-21dbus-daemon23:20:530
2217056994031,6cyclictest421-21dbus-daemon23:20:530
2217056994031,5cyclictest2403711-21switchtime00:15:540
2217058993930,6cyclictest421-21dbus-daemon00:25:012
221705799393,26cyclictest2282443-21ssh21:45:461
2217057993931,5cyclictest2341584-21grep23:00:001
221705799392,28cyclictest2407431-21ssh00:20:451
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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