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2026-05-22 - 15:26

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 Fri May 22, 2026 00:44:13)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
316191121870,3sleep375-21kworker/3:1+events22:40:013
30298952720,1chrt3029900-21kthreadcore20:25:531
31014152710,3sleep2371rcuc/221:36:042
30812802640,1sleep13081281-21missed_timers21:15:561
31140602550,2sleep375-21kworker/3:1-events21:50:533
2951386995543,8cyclictest1704890-21systemd-journal20:55:411
2951386995341,9cyclictest3195636-21ntpq23:11:001
2951388995243,6cyclictest1704890-21systemd-journal21:30:012
30039002510,6sleep20-21swapper/220:00:542
2951383995140,9cyclictest2955370-21ntpq19:11:020
2951386995044,4cyclictest3056642-21kworker/u8:0+flush-8:022:05:471
2951383995044,4cyclictest3191850-21apt-get23:10:440
2951388994938,8cyclictest1704890-21systemd-journal00:09:592
2951386994837,8cyclictest1704890-21systemd-journal19:15:411
2951386994738,6cyclictest3241533-21kworker/u8:2+flush-8:000:35:501
2951386994736,8cyclictest1704890-21systemd-journal21:34:411
2951383994738,7cyclictest3170907-21ntpq22:45:570
2951386994640,4cyclictest3142169-21apt-get22:20:451
2951386994639,5cyclictest3112237-21/usr/sbin/munin21:50:561
2951386994535,8cyclictest3150917-21ntpq22:25:581
2951386994533,9cyclictest1704890-21systemd-journal23:46:391
2951383994538,5cyclictest3225694-21ntpq23:40:570
2951386994436,6cyclictest3082593-21/usr/sbin/munin21:21:021
2951383994438,4cyclictest3056642-21kworker/u8:0+events_unbound23:55:550
2951388994339,3cyclictest3056642-21kworker/u8:0+flush-8:023:25:012
2951388994339,3cyclictest2946128-21kworker/u8:2+events_unbound19:20:002
2951388994338,3cyclictest3056642-21kworker/u8:0+flush-8:000:25:592
2951388994336,4cyclictest3066562-21kworker/u8:1+flush-8:022:20:552
2951386994336,4cyclictest3056642-21kworker/u8:0+flush-8:000:15:501
2951386994333,8cyclictest3245568-21ntpq00:00:571
2951386994333,7cyclictest3067714-21/usr/sbin/munin21:06:001
2951383994335,6cyclictest3062482-21latency_hist21:00:020
2951388994238,3cyclictest2097876-21kworker/u8:1+flush-8:020:36:032
2951388994234,6cyclictest1704890-21systemd-journal23:11:402
2951386994236,4cyclictest2963437-21apt-get19:20:431
2951386994233,6cyclictest3172045-21/usr/sbin/munin22:50:591
2951383994235,5cyclictest3212079-21apt-get23:30:450
31595722410,3sleep20-21swapper/222:35:542
2951388994135,4cyclictest3156772-21kworker/u8:1+flush-8:023:26:022
2951388994133,6cyclictest3082302-21awk21:20:012
2951386994133,6cyclictest3231829-21/usr/sbin/munin23:50:591
2951383994134,5cyclictest1704890-21systemd-journal23:05:000
2951383994131,7cyclictest3111953-21latency_hist21:50:010
2951386994034,4cyclictest3196781-21apt-get23:15:421
2951386994024,11cyclictest1704890-21systemd-journal20:47:411
295138399402,36cyclictest1531336-21kworker/0:2+events20:20:010
30430452390,1sleep13043047-21basename20:40:451
2951383993930,7cyclictest2997730-21http19:55:010
2951383993929,8cyclictest3013043-21/usr/sbin/munin20:10:550
2951388993833,3cyclictest3056642-21kworker/u8:0+flush-8:023:40:532
2951386993833,4cyclictest3072637-21kworker/u8:2+flush-8:021:25:521
2951386993831,5cyclictest2997702-21cron19:54:591
2951386993831,4cyclictest3056642-21kworker/u8:0+events_unbound23:30:011
2951383993829,7cyclictest3008091-21/usr/sbin/munin20:05:560
2951388993728,7cyclictest3122269-21cp22:00:002
2951386993732,3cyclictest2946128-21kworker/u8:2+events_unbound20:06:011
2951383993730,5cyclictest3255951-21grep00:11:070
2951383993730,5cyclictest3255951-21grep00:11:060
2951383993726,9cyclictest2962233-21ntpq19:15:580
29510312374,10sleep10-21swapper/119:08:011
2951388993632,3cyclictest3066562-21kworker/u8:1+flush-8:021:00:592
2951388993631,4cyclictest3072637-21kworker/u8:2+flush-8:021:31:002
2951388993631,3cyclictest3225557-21kworker/u8:3+events_unbound23:45:042
2951388993630,4cyclictest3151759-21apt-get22:30:012
2951388993629,5cyclictest2946128-21kworker/u8:2+flush-8:019:35:532
2951386993631,3cyclictest2968393-21apt-get19:25:441
2951386993627,6cyclictest1704890-21systemd-journal19:46:421
2951386993530,3cyclictest3177027-21apt-get22:55:441
2951386993529,4cyclictest3156772-21kworker/u8:1+events_unbound23:00:491
2951386993526,7cyclictest3261580-21apt-get00:20:441
2951386993523,8cyclictest1704890-21systemd-journal20:01:411
295138399353,30cyclictest3082332-21kworker/0:0+events23:05:470
295138399352,27cyclictest3082332-21kworker/0:0+events21:55:460
295138399351,28cyclictest3082332-21kworker/0:0+events22:25:450
295138399351,28cyclictest1531336-21kworker/0:2+events19:25:010
295138399351,27cyclictest1531336-21kworker/0:2+events19:40:450
294718923525,6sleep20-21swapper/219:05:522
2951388993430,3cyclictest3032992-21kworker/u8:3+flush-8:020:40:502
2951388993427,5cyclictest3002891-21awk20:00:012
2951388993425,7cyclictest3241420-21awk00:00:002
2951386993427,5cyclictest3056642-21kworker/u8:0+flush-8:021:00:491
2951386993427,5cyclictest3056642-21kworker/u8:0+flush-8:000:25:501
2951386993427,5cyclictest2986933-21ntpq19:40:561
2951383993429,3cyclictest3056642-21kworker/u8:0+flush-8:000:15:550
2951383993427,5cyclictest3142418-21diskstats22:20:490
295138399342,30cyclictest3027616-21kworker/0:1+events20:25:470
295138399342,27cyclictest3027616-21kworker/0:1+events20:30:450
295138399341,31cyclictest3082332-21kworker/0:0+events22:30:470
295138399341,27cyclictest3221680-21kworker/0:1+events00:05:000
2951383993410,19cyclictest3082332-21kworker/0:0+events22:20:010
2951383993410,19cyclictest3082332-21kworker/0:0+events22:20:010
2951388993328,4cyclictest3170891-21kworker/u8:2+flush-8:022:45:582
2951386993328,4cyclictest3170891-21kworker/u8:2+flush-8:023:31:151
2951386993328,3cyclictest3056642-21kworker/u8:0+events_unbound00:05:531
2951386993326,5cyclictest2998250-21apt-get19:55:431
2951386993324,7cyclictest3157200-21/usr/sbin/munin22:35:571
2951386993323,8cyclictest3141051-21ntpq22:16:021
2951386993323,8cyclictest3141051-21ntpq22:16:011
2951388993228,3cyclictest2097876-21kworker/u8:1+events_unbound20:20:002
2951386993224,6cyclictest2097876-21kworker/u8:1+flush-8:020:15:581
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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