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2026-06-14 - 17:54

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 Sun Jun 14, 2026 12:44:15)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
25401921210,3chrt451irq_work/308:15:283
3835192830,3chrt0-21swapper/110:25:321
187044997656,16cyclictest307421-21ntpq09:05:390
187049997162,7cyclictest191952-21apt-get07:15:011
187044996443,18cyclictest462183-21latency_hist11:45:000
187049996352,8cyclictest361748-21ntpq10:00:391
187049996350,10cyclictest192225-21apt-key07:15:011
187044996338,22cyclictest452799-21diskstats11:35:280
187044996255,5cyclictest259202-21apt-get08:20:250
187044996242,17cyclictest204057-21latency_hist07:25:000
187049996156,4cyclictest366968-21kworker/u8:0+events_unbound11:30:331
187049996054,5cyclictest186913-21kworker/u8:3+flush-8:009:20:451
187049996053,4cyclictest427547-21kworker/u8:3+events_unbound12:05:301
187049996051,7cyclictest273615-21kworker/u8:2+flush-8:008:40:411
3066972580,3sleep2371rcuc/209:05:342
187049995851,4cyclictest366968-21kworker/u8:0+events_unbound11:05:451
187053995748,6cyclictest258787-21base6408:20:002
187049995746,9cyclictest267867-21ntpq08:25:391
187044995736,18cyclictest356820-21ntpq09:55:390
187049995648,6cyclictest366968-21kworker/u8:0+events_unbound12:15:371
187049995643,10cyclictest1704890-21systemd-journal10:15:011
187049995550,3cyclictest3555851-21kworker/u8:0+flush-8:008:20:301
187049995544,8cyclictest461306-21ntpq11:40:401
187044995535,17cyclictest422343-21apt-get11:05:000
187049995447,5cyclictest186913-21kworker/u8:3+flush-8:007:40:421
187044995412,30cyclictest431592-21ld11:10:390
187049995348,4cyclictest273615-21kworker/u8:2+flush-8:008:35:311
187049995345,6cyclictest3555851-21kworker/u8:0+flush-8:008:05:471
187044995347,4cyclictest244149-21apt-get08:05:260
187044995332,18cyclictest229030-21latency_hist07:50:010
187044995245,4cyclictest417346-21latency_hist11:00:010
187044995242,8cyclictest327192-21ntpq09:25:390
187053995144,4cyclictest1704890-21systemd-journal12:09:592
187044995142,7cyclictest426687-21ntpq11:05:400
187049995041,6cyclictest382645-21base6410:25:001
187044995038,9cyclictest1704890-21systemd-journal07:55:010
187049994944,4cyclictest3555851-21kworker/u8:0+events_unbound08:30:451
187049994941,6cyclictest1704890-21systemd-journal11:05:011
187049994940,6cyclictest427547-21kworker/u8:3+flush-8:011:50:451
187049994841,5cyclictest351935-21ntpq09:50:401
187049994743,3cyclictest186913-21kworker/u8:3+flush-8:007:50:311
187049994740,5cyclictest3555851-21kworker/u8:0+flush-8:008:00:311
187049994738,6cyclictest516527-21latency_hist12:40:011
187049994738,6cyclictest516527-21latency_hist12:40:011
187044994740,5cyclictest1704890-21systemd-journal11:30:250
187044994725,19cyclictest406524-21ntpq10:45:400
187053994639,5cyclictest298715-21apt-get09:00:242
187049994642,3cyclictest333259-21kworker/u8:1+flush-8:009:45:431
187049994642,3cyclictest273615-21kworker/u8:2+flush-8:008:50:311
187049994640,4cyclictest186913-21kworker/u8:3+flush-8:009:10:311
187049994639,4cyclictest312384-21kworker/u8:1+events_unbound09:15:301
187044994638,6cyclictest273615-21kworker/u8:2+flush-8:008:50:430
187049994540,4cyclictest407672-21kworker/u8:2+events_unbound11:10:431
187049994539,4cyclictest3555851-21kworker/u8:0+flush-8:008:15:421
187049994539,4cyclictest186913-21kworker/u8:3+flush-8:007:35:361
187049994536,7cyclictest447315-21latency_hist11:30:001
187044994535,8cyclictest472575-21diskstats11:55:290
187044994522,16cyclictest161rcu_preempt10:40:320
187044994517,20cyclictest0-21swapper/011:25:340
187044994515,20cyclictest0-21swapper/009:10:470
187049994440,3cyclictest427547-21kworker/u8:3+events_unbound12:10:381
187049994440,3cyclictest407672-21kworker/u8:2+events_unbound10:50:451
187049994439,3cyclictest377513-21kworker/u8:1+flush-8:010:35:261
187049994437,5cyclictest332152-21ntpq09:30:401
187049994437,5cyclictest332152-21ntpq09:30:391
187049994437,5cyclictest283870-21/usr/sbin/munin08:45:361
187049994436,6cyclictest353093-21apt-get09:55:261
187044994423,18cyclictest282689-21ntpq08:40:370
18704499441,33cyclictest314413-21/usr/sbin/munin09:15:330
187044994413,22cyclictest0-21swapper/010:54:160
187049994339,3cyclictest186913-21kworker/u8:3+flush-8:010:55:301
187049994337,5cyclictest273615-21kworker/u8:2+events_unbound09:25:441
187049994337,4cyclictest427547-21kworker/u8:3+flush-8:011:15:261
187053994237,4cyclictest273615-21kworker/u8:2+flush-8:008:55:432
187049994236,4cyclictest427547-21kworker/u8:3+events_unbound11:35:261
187044994236,4cyclictest467393-21apt-get11:50:260
187044994233,6cyclictest491783-21latency_hist12:15:010
18704499420,32cyclictest363042-21tr10:05:280
18678824227,9sleep10-21swapper/107:09:081
187053994131,8cyclictest1704890-21systemd-journal12:40:002
187053994131,8cyclictest1704890-21systemd-journal12:40:002
187049994137,3cyclictest3557282-21kworker/u8:1+flush-8:007:30:311
187049994133,6cyclictest501974-21apt-get12:25:261
187044994123,17cyclictest3557282-21kworker/u8:1+flush-8:007:30:260
187044994123,16cyclictest191561-21unixbench_singl07:10:460
187044994113,21cyclictest194579-21cpuspeed07:15:270
187049994037,2cyclictest3555851-21kworker/u8:0+flush-8:007:20:471
187049994036,3cyclictest333259-21kworker/u8:1+flush-8:009:35:461
187049994036,3cyclictest186913-21kworker/u8:3+events_unbound10:45:481
187049994034,4cyclictest462461-21apt-get11:45:241
187049994033,5cyclictest186913-21kworker/u8:3+flush-8:009:00:411
187049994031,6cyclictest362956-21apt-get10:05:251
187049994031,6cyclictest298419-21latency_hist09:00:011
187049993935,3cyclictest3555851-21kworker/u8:0+events_unbound07:55:411
187049993935,3cyclictest3555851-21kworker/u8:0+events_unbound07:45:281
187044993930,7cyclictest1704890-21systemd-journal12:04:590
187044993921,16cyclictest218691-21unixbench_multi07:35:460
187044993920,17cyclictest382981-21/usr/sbin/munin10:25:370
187049993830,6cyclictest372845-21/usr/sbin/munin10:15:381
187044993832,4cyclictest333259-21kworker/u8:1+flush-8:009:40:450
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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