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2026-09-15 - 02:11

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #5, slot #4

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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  Intel
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.

Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: ondemand
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rack5slot4s.osadl.org (updated Tue Sep 15, 2026 00:44:14)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
65554423430,5sleep30-21swapper/321:19:053
57499521900,4sleep30-21swapper/319:54:203
58972521780,2sleep3471rcuc/320:09:203
7027802810,2chrt75-21kworker/3:1-events22:04:113
5655042750,2chrt75-21kworker/3:1+events19:45:003
5655042750,2chrt75-21kworker/3:1+events19:45:003
528734994334,7cyclictest719677-21/usr/sbin/munin22:24:160
52873499415,31cyclictest533689-21kworker/0:2+events22:57:430
528734994031,7cyclictest734793-21/usr/sbin/munin22:39:200
52873499400,38cyclictest1-21systemd23:20:000
5251132384,30sleep20-21swapper/219:09:102
528734993729,6cyclictest774059-21latency_hist23:15:010
5240652374,9sleep10-21swapper/119:07:151
528734993525,8cyclictest604451-21ntpq20:24:140
528734993522,11cyclictest278-21systemd-journal21:00:010
7017112340,7sleep20-21swapper/222:04:102
528736993428,4cyclictest610465-21kworker/u8:2+flush-8:020:49:121
528736993425,7cyclictest278-21systemd-journal21:35:001
528734993428,4cyclictest610465-21kworker/u8:2+flush-8:020:39:100
528734993424,7cyclictest693777-21ntpq21:54:140
528734993424,7cyclictest278-21systemd-journal23:30:000
528734993329,2cyclictest858177-21sendmail00:40:000
528734993327,4cyclictest560515-21munin-run19:40:000
528734993326,5cyclictest783339-21ntpq23:24:110
528734993326,5cyclictest676058-21kthreadcore21:39:100
528736993227,3cyclictest739210-21kworker/u8:1+flush-8:023:49:101
528736993226,4cyclictest755422-21irqcore22:59:081
528736993224,6cyclictest778375-21ntpq23:19:121
528736993126,3cyclictest780314-21irqrtprio23:24:051
528736993123,6cyclictest529421-21cpuspeed_turbos19:14:051
528736993123,6cyclictest528609-21kworker/u8:3+flush-8:019:29:201
528734993126,3cyclictest574651-21needreboot19:54:120
528734993121,7cyclictest569778-21ntpq19:49:150
528744993024,4cyclictest756039-21tr22:59:092
528736993026,2cyclictest644911-21systemd-run21:05:011
528736993025,3cyclictest707001-21kthreadcore22:09:111
528736993024,4cyclictest773948-21unixbench_singl23:14:201
528736993023,5cyclictest600663-21/usr/sbin/munin20:24:191
528734993026,2cyclictest718437-21needreboot22:19:120
528734993021,7cyclictest550403-21apt-get19:30:000
528744992923,5cyclictest486698-21kworker/u8:1+flush-8:020:49:202
528736992925,2cyclictest576622-21irqrtprio19:59:081
528736992922,5cyclictest744068-21unixbench_singl22:44:211
528736992921,6cyclictest560508-21latency_hist19:40:001
52873499295,22cyclictest533689-21kworker/0:2+events21:29:070
528734992925,3cyclictest749107-21turbostat.cron22:50:010
528734992924,3cyclictest815159-21kthreadcore23:59:080
528734992924,3cyclictest815159-21kthreadcore23:59:080
528734992921,6cyclictest749869-21/usr/sbin/munin22:54:110
528734992919,8cyclictest641412-21kthreadcore21:04:080
528744992823,4cyclictest674595-21kworker/u8:3+events_unbound21:55:002
528744992823,3cyclictest834260-21cpuspeed_turbos00:19:042
528744992823,3cyclictest670261-21aten2_r5power_p21:34:032
528736992821,5cyclictest680311-21cpuspeed_turbos21:44:031
528736992820,6cyclictest561082-21apt-get19:43:591
528736992820,6cyclictest561082-21apt-get19:43:591
528736992819,7cyclictest764379-21latency_hist23:05:011
528736992819,6cyclictest278-21systemd-journal22:49:261
528734992824,2cyclictest834528-21runrttasks00:19:070
528734992824,2cyclictest0-21swapper/020:20:000
528734992823,3cyclictest639949-21kworker/u8:1+events_unbound21:20:010
528734992823,3cyclictest1-21systemd19:15:010
528734992822,5cyclictest818662-21kworker/u8:3+flush-8:000:24:050
528734992819,7cyclictest853138-21unixbench_singl00:34:190
528734992818,8cyclictest804613-21diskstats23:49:040
528736992724,2cyclictest540552-21systemd-run19:20:001
528736992723,3cyclictest854542-21irqrtprio00:39:101
528736992722,4cyclictest659719-21idleruntime-cro21:20:001
528736992722,3cyclictest784887-21fschecks_time23:29:081
528736992722,3cyclictest774076-21kworker/u8:2+flush-8:000:05:001
528736992722,3cyclictest729930-21fschecks_time22:34:041
528736992722,3cyclictest551278-21aten2_r5power_p19:34:031
528736992722,3cyclictest0-21swapper/121:00:001
528736992721,4cyclictest590073-21unixbench_multi20:09:221
528736992719,6cyclictest739171-21latency_hist22:40:011
52873699271,11cyclictest693732-21ntpq21:54:131
528734992722,3cyclictest823593-21cron00:04:590
528734992722,3cyclictest670466-21fschecks_count21:34:050
528734992721,4cyclictest704285-21cron22:05:000
528744992622,2cyclictest794438-21aten2_r5power_c23:39:042
528744992622,2cyclictest659617-21unixbench_singl21:19:222
528744992621,3cyclictest556479-21fschecks_time19:39:052
528736992623,2cyclictest570428-21latency_hist19:50:001
528736992623,2cyclictest0-21swapper/122:14:011
528736992621,3cyclictest0-21swapper/122:55:001
528736992619,5cyclictest833363-21unixbench_singl00:14:211
528736992618,6cyclictest729009-21cron22:30:001
528736992617,7cyclictest699326-21latency_hist22:00:011
52873499264,18cyclictest533689-21kworker/0:2+events22:25:110
528734992623,2cyclictest734229-21latency_hist22:35:010
528734992623,2cyclictest611147-21fschecks_time20:34:060
528734992621,4cyclictest565390-21unixbench_singl19:44:190
528734992621,4cyclictest565390-21unixbench_singl19:44:190
528734992621,4cyclictest528609-21kworker/u8:3+flush-8:019:34:250
528734992621,3cyclictest628978-21kthreadcore20:49:140
528734992621,3cyclictest610465-21kworker/u8:2+flush-8:022:09:170
528734992621,3cyclictest585291-21cron20:05:000
528734992620,5cyclictest486698-21kworker/u8:1+flush-8:019:59:060
528734992620,4cyclictest789691-21cpuspeed_turbos23:34:040
528734992618,6cyclictest684489-21latency_hist21:45:000
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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