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2026-06-20 - 09:46

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 100 highest latencies:
System rack2slot7s.osadl.org (updated Sat Jun 20, 2026 00:43:28)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
420530999177,5cyclictest0-21swapper/200:15:472
420529998878,6cyclictest572051-21latency00:15:261
420528997950,26cyclictest571656-40mandb00:16:120
420528996543,16cyclictest12650irq/32-eth023:50:270
420528996047,9cyclictest0-21swapper/000:20:260
420528995438,14cyclictest561903-21ssh00:00:010
420530995042,5cyclictest577355-21munin-plugin-st00:25:012
420530994942,3cyclictest0-21swapper/221:40:312
420529994938,7cyclictest559129-21/usr/sbin/munin23:55:181
420528994842,3cyclictest586613-21ssh00:40:010
42053099445,30cyclictest519738-21ssh22:50:332
420529994435,6cyclictest575846-21unixbench_multi00:20:411
420528994435,6cyclictest421-21dbus-daemon23:20:020
420530994335,5cyclictest472216-21latency_hist21:35:022
420529994335,5cyclictest524798-21systemd-run23:00:021
420529994333,6cyclictest518597-21ssh22:50:021
420528994337,4cyclictest464280-21timerwakeupswit21:20:390
420530994234,5cyclictest422015-21grep19:15:012
420530994232,6cyclictest1-21systemd22:00:012
420530994231,8cyclictest549544-21idleruntime-cro23:40:012
42052999424,30cyclictest504102-21ssh22:25:281
420528994236,4cyclictest531002-21ssh23:10:020
42052899423,29cyclictest665-21snmpd22:30:330
42052899422,33cyclictest457525-21ssh21:10:270
420529994133,5cyclictest462773-21idleruntime-cro21:20:011
420529994132,6cyclictest1-21systemd22:25:011
420529994131,6cyclictest439-21systemd-logind23:50:021
420529994131,6cyclictest1-21systemd19:25:021
420529994129,9cyclictest1000-21mta-sts-daemon22:20:021
420528994133,4cyclictest0-21swapper/023:45:320
42052999403,29cyclictest485672-21ssh21:55:321
420529994032,5cyclictest515516-21latency_hist22:45:021
420529994028,9cyclictest541668-21switchtime23:25:421
420530993930,6cyclictest544919-21unixbench_multi23:30:402
420530993930,4cyclictest0-21swapper/221:20:302
420530993928,7cyclictest561985-21cups-browsed00:08:092
420529993931,5cyclictest546460-21systemd-run23:35:021
420529993930,5cyclictest534073-21munin-plugin-st23:15:011
420529993927,8cyclictest421-21dbus-daemon00:02:491
42052999392,32cyclictest556704-21ssh23:50:261
42052899393,28cyclictest473185-21ssh21:35:280
42053099383,29cyclictest488836-21ssh22:00:342
420530993829,5cyclictest0-21swapper/222:20:312
420530993827,7cyclictest421-21dbus-daemon00:10:322
420529993830,5cyclictest492363-21head22:05:471
420529993830,5cyclictest482031-21sort21:50:201
420529993829,6cyclictest423550-21systemd-run19:20:011
420529993827,8cyclictest476677-21threads21:40:421
42052899383,28cyclictest547451-21ssh23:35:280
420528993832,4cyclictest546440-21idleruntime-cro23:35:010
420528993828,8cyclictest543352-21munin-plugin-st23:30:010
420528993828,5cyclictest0-21swapper/023:20:360
420530993729,5cyclictest485-21in:imuxsock21:00:012
42052999373,24cyclictest466904-21ssh21:25:261
420529993729,5cyclictest475277-21tr21:40:011
420529993728,6cyclictest506819-21sh22:30:201
42052899374,28cyclictest522660-21ssh22:55:280
42052899374,27cyclictest665-21snmpd22:10:290
420528993731,4cyclictest491970-21wc22:05:400
420528993731,4cyclictest478405-21latency_hist21:45:020
420528993722,11cyclictest437051-21kworker/u8:18+events_unbound21:00:310
420528993713,14cyclictest151ktimers/020:10:310
420530993629,3cyclictest0-21swapper/223:50:012
420530993628,4cyclictest0-21swapper/221:50:282
420530993627,6cyclictest516531-21ntp_kernel_pll_22:45:292
420529993628,5cyclictest456545-21systemd-run21:10:011
420529993627,6cyclictest0-21swapper/122:40:011
420528993628,5cyclictest0-21swapper/021:15:350
420530993528,3cyclictest0-21swapper/223:20:372
420530993528,3cyclictest0-21swapper/221:10:272
420530993527,4cyclictest0-21swapper/222:40:012
420530993526,6cyclictest455017-21cron21:05:012
420530993526,5cyclictest1000-21mta-sts-daemon23:55:002
420529993527,5cyclictest582018-21unixbench_multi00:30:391
420529993527,5cyclictest569072-21ssh00:10:261
420529993526,5cyclictest1000-21mta-sts-daemon22:00:301
420529993524,8cyclictest433349-21ntp_kernel_err19:50:251
420529993524,8cyclictest433349-21ntp_kernel_err19:50:251
420529993524,6cyclictest2878171-21cups-browsed21:21:051
42052999352,25cyclictest519581-21ssh22:50:271
420529993519,2cyclictest0-21swapper/123:35:261
420529993511,7cyclictest459572-21sh21:14:491
420528993527,5cyclictest439-21systemd-logind20:10:020
420530993428,3cyclictest0-21swapper/222:15:012
420530993426,4cyclictest0-21swapper/221:45:322
420530993424,6cyclictest265-21systemd-journal20:55:012
42052999347,10cyclictest584027-21cpu00:35:191
420529993426,5cyclictest446036-21systemd-run20:35:011
420529993426,5cyclictest265-21systemd-journal20:40:011
420529993426,5cyclictest0-21swapper/119:40:011
420528993428,4cyclictest563549-21tail00:00:410
420528993428,4cyclictest534060-21cron23:15:010
420528993427,4cyclictest1002-21mta-sts-daemon22:25:330
420528993426,6cyclictest487710-21latency_hist22:00:020
420528993423,8cyclictest12650irq/32-eth021:45:320
42052899342,27cyclictest516493-21ssh22:45:280
420528993421,8cyclictest151ktimers/020:30:270
420530993327,3cyclictest0-21swapper/222:30:012
420530993325,5cyclictest423556-21systemd-run19:20:022
420530993324,6cyclictest421-21dbus-daemon20:45:012
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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