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2026-09-22 - 09:07

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 22, 2026 00:44:15)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
35203102710,18sleep375-21kworker/3:1+events20:59:043
36248852570,1chrt3624890-21irqrtprio22:44:031
36248852570,1chrt3624890-21irqrtprio22:44:031
3412164995445,7cyclictest278-21systemd-journal00:05:001
3412164995445,7cyclictest278-21systemd-journal00:05:001
3412164995348,3cyclictest3360057-21kworker/u8:2+flush-8:019:19:171
3412164995242,7cyclictest3429100-21latency_hist19:25:001
36549552490,5sleep3451irq_work/323:14:063
3412161994843,3cyclictest3489163-21kworker/u8:0+events_unbound20:38:590
3412161994738,7cyclictest3708530-21/usr/sbin/munin00:09:160
3412161994640,4cyclictest3668996-21/usr/sbin/munin23:29:140
3412161994638,6cyclictest3519280-21/usr/sbin/munin20:59:130
3412161994537,5cyclictest3583540-21apt-get22:00:000
3412161994437,5cyclictest3423578-21kworker/u8:0+flush-8:019:28:590
3412161994437,5cyclictest3423578-21kworker/u8:0+flush-8:019:28:590
3412164994338,3cyclictest3558232-21ntpq21:34:091
3412164994336,5cyclictest3412003-21kworker/u8:1+flush-8:020:19:001
3412161994335,6cyclictest3622819-21ntpq22:39:120
3412161994335,6cyclictest3622819-21ntpq22:39:120
3412164994234,6cyclictest3738441-21/usr/sbin/munin00:39:161
3412164994234,6cyclictest3713759-21diskstats00:13:591
3412161994135,4cyclictest3489163-21kworker/u8:0+flush-8:020:44:010
3412161994132,7cyclictest3722861-21apt-get00:20:010
3412161994132,7cyclictest3688754-21/usr/sbin/munin23:49:120
3412164994030,8cyclictest3533000-21ntpq21:09:111
3412164994030,8cyclictest3533000-21ntpq21:09:111
3412161994036,2cyclictest3703082-21kworker/u8:3+events_unbound00:04:040
3412161994036,2cyclictest3703082-21kworker/u8:3+events_unbound00:04:040
3412161994035,4cyclictest3489163-21kworker/u8:0+flush-8:020:49:010
3412164993930,7cyclictest3417010-21cat19:15:001
3412161993929,8cyclictest3742210-21ntpq00:39:100
3412164993831,5cyclictest3438952-21cat19:35:001
3412161993833,3cyclictest3448914-21kworker/u8:2+flush-8:019:59:000
3412161993832,4cyclictest3633017-21kworker/u8:0+flush-8:023:24:150
3412161993831,5cyclictest278-21systemd-journal20:30:560
3412164993731,4cyclictest278-21systemd-journal00:09:591
3412164993727,8cyclictest3548113-21ntpq21:24:101
3412161993730,5cyclictest3412003-21kworker/u8:1+events_unbound21:30:010
3412164993630,4cyclictest3489163-21kworker/u8:0+flush-8:020:34:131
3412164993628,6cyclictest278-21systemd-journal19:39:121
3412164993627,3cyclictest3518782-21kworker/u8:3+flush-8:021:04:011
3412164993627,3cyclictest3518782-21kworker/u8:3+flush-8:021:04:011
3412164993626,8cyclictest3513188-21ntpq20:49:091
340750723621,10sleep10-21swapper/119:07:191
3412164993531,3cyclictest3489163-21kworker/u8:0+events_unbound20:59:031
3412164993524,8cyclictest3677780-21ntpq23:34:131
3412161993531,2cyclictest3628883-21latency_hist22:45:000
3412161993531,2cyclictest3628883-21latency_hist22:45:000
3412161993526,6cyclictest3588750-21latency_hist22:05:010
3412169993427,5cyclictest278-21systemd-journal23:50:002
3412164993428,5cyclictest3423578-21kworker/u8:0+flush-8:019:29:131
3412164993428,5cyclictest3423578-21kworker/u8:0+flush-8:019:29:131
3412161993429,4cyclictest3412003-21kworker/u8:1+flush-8:019:49:010
3412161993428,4cyclictest2596456-21kworker/u8:3+events_unbound19:15:020
3412161993425,7cyclictest3533606-21latency_hist21:10:000
3412161993425,7cyclictest3533606-21latency_hist21:10:000
3412161993425,7cyclictest3518166-21ntpq20:54:110
3412161993424,8cyclictest3637923-21ntpq22:54:100
37347312330,3sleep10-21swapper/100:34:051
3412164993329,2cyclictest3649976-21irqrtprio23:09:011
3412164993327,5cyclictest2596456-21kworker/u8:3+flush-8:020:09:141
3412161993328,3cyclictest3618443-21unixbench_singl22:34:160
3412161993328,3cyclictest3438946-21ls19:35:000
3412161993324,7cyclictest3659402-21diskstats23:18:590
3412164993226,5cyclictest3633017-21kworker/u8:0+flush-8:000:19:021
3412161993228,3cyclictest3429124-21systemd-run19:25:000
3412161993226,4cyclictest3443915-21latency_hist19:40:010
341216199322,28cyclictest3508955-21kworker/0:2+events21:14:330
3412164993127,2cyclictest3642823-21needreboot22:59:071
3412164993126,4cyclictest3648689-21latency_hist23:05:021
3412164993124,5cyclictest3489163-21kworker/u8:0+flush-8:020:44:131
3412161993127,3cyclictest3678291-21kworker/u8:2+flush-8:000:24:200
3412161993127,2cyclictest3598644-21idleruntime-cro22:15:000
3412161993123,6cyclictest3483074-21ntpq20:19:100
3412169993021,7cyclictest3722981-21gpgv00:20:012
3412164993026,3cyclictest3412003-21kworker/u8:1+events_unbound19:49:141
3412164993026,2cyclictest3462993-21needreboot19:59:061
3412164993026,2cyclictest0-21swapper/100:29:041
3412164993025,3cyclictest3598204-21systemctl22:14:151
3412164993024,4cyclictest3412003-21kworker/u8:1+flush-8:020:24:011
3412164993023,5cyclictest278-21systemd-journal23:40:001
3412164993022,6cyclictest3634153-21apt-get22:53:561
3412164993020,7cyclictest3698072-21latency_hist23:55:001
355333622924,3sleep13518782-21kworker/u8:3+flush-8:021:29:161
3412169992925,2cyclictest3738818-21fschecks_time00:39:032
3412164992925,2cyclictest0-21swapper/123:44:011
3412164992924,4cyclictest3593597-21kworker/u8:1+flush-8:022:31:431
3412164992923,5cyclictest3533555-21kworker/u8:2+events_unbound21:44:131
3412164992917,9cyclictest278-21systemd-journal21:50:001
341216199294,22cyclictest3608941-21sshd22:26:130
3412161992924,4cyclictest3703082-21kworker/u8:3+flush-8:000:14:140
3412161992924,3cyclictest3644325-21cpuspeed_turbos23:04:000
3412161992922,5cyclictest2596456-21kworker/u8:3+events_unbound19:14:130
3412169992824,2cyclictest3708667-21aten2_r5power_v00:08:592
3412169992823,3cyclictest3658599-21cron23:15:002
3412169992819,7cyclictest3553936-21gpgv21:30:012
3412169992818,7cyclictest3424225-21cat19:20:002
3412164992824,3cyclictest838-21mta-sts-daemon23:13:581
3412164992824,2cyclictest3445507-21kthreadcore19:44:051
3412164992823,3cyclictest3469051-21latency_hist20:05:011
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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