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2026-03-11 - 16:28

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, 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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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
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rackeslot4s.osadl.org (updated Wed Mar 11, 2026 12:44:05)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
229115993329,3cyclictest260031-21apt-get07:40:023
229115993226,4cyclictest252-21systemd-journal11:35:003
229115993127,3cyclictest322770-21gpgv08:40:013
229115992824,3cyclictest384942-21kworker/u8:2+flush-259:011:10:003
229108992724,2cyclictest410958-21kworker/u8:0+flush-259:010:25:231
229105992720,5cyclictest436386-21ntpq10:25:200
229111992618,6cyclictest252-21systemd-journal12:00:002
229108992622,3cyclictest431414-21kworker/u8:3+events_unbound11:35:011
229108992620,4cyclictest504698-21apt-get11:35:111
229108992619,5cyclictest509883-21apt-get11:40:121
229105992622,3cyclictest223840-21kworker/u8:0+events_unbound07:40:010
229105992620,4cyclictest380187-21diskstats09:35:120
229108992521,3cyclictest363999-21kworker/u8:4+events_unbound09:50:011
229108992521,3cyclictest218462-21kworker/u8:4+flush-259:007:20:231
229115992419,4cyclictest384942-21kworker/u8:2+flush-259:010:55:203
229115992419,3cyclictest252-21systemd-journal12:30:003
229115992418,4cyclictest384955-21latency_hist09:40:013
229115992418,4cyclictest379768-21latency_hist09:35:013
229108992420,3cyclictest463089-21kworker/u8:0+flush-259:010:55:231
229105992420,3cyclictest322654-21apt-get08:40:000
229105992419,4cyclictest545929-21/usr/sbin/munin12:15:140
229115992319,3cyclictest431414-21kworker/u8:3+flush-259:010:40:263
229108992320,2cyclictest494088-21kworker/u8:5+events_unbound12:20:191
229108992319,3cyclictest384942-21kworker/u8:2+events_unbound10:20:191
229108992318,3cyclictest410958-21kworker/u8:0+flush-259:010:19:591
229105992317,4cyclictest353153-21ntpq09:05:230
22910599231,20cyclictest252-21systemd-journal11:51:180
22910599230,22cyclictest452767-21true10:44:590
229108992219,2cyclictest566273-21kworker/u8:2+flush-259:012:30:231
229108992219,2cyclictest401066-21kworker/u8:1+flush-259:010:00:231
229108992219,2cyclictest359163-21kworker/u8:1+events_unbound09:30:141
229108992218,3cyclictest525300-21kworker/u8:1+events_unbound12:00:191
229108992217,4cyclictest489143-21apt-get11:20:121
229108992216,4cyclictest252-21systemd-journal07:17:001
229105992216,4cyclictest504439-21latency_hist11:35:010
229115992117,3cyclictest535414-21kworker/u8:0+flush-259:012:25:013
229115992117,3cyclictest401066-21kworker/u8:1+events_unbound10:00:183
229115992117,3cyclictest265862-21kworker/u8:3+flush-259:007:54:593
229115992115,4cyclictest482857-21ntpq11:10:223
229115992115,4cyclictest400597-21cp09:55:013
229108992117,3cyclictest252-21systemd-journal11:08:391
229105992119,1cyclictest0-21swapper/012:25:010
229105992115,4cyclictest358319-21ntpq09:10:220
229105992114,5cyclictest431721-21latency_hist10:25:010
229115992016,3cyclictest223840-21kworker/u8:0+flush-259:007:30:163
229115992016,2cyclictest494088-21kworker/u8:5+flush-259:012:05:013
229111992012,7cyclictest252-21systemd-journal11:19:542
229108992016,3cyclictest359163-21kworker/u8:1+events_unbound09:35:131
229108992015,3cyclictest252-21systemd-journal09:13:171
229105992014,4cyclictest473402-21turbostat11:05:000
229105992012,6cyclictest535816-21diskstats12:05:120
22911199197,10cyclictest0-21swapper/211:30:112
22911199196,11cyclictest513-21gdbus11:15:012
229111991915,3cyclictest525300-21kworker/u8:1+flush-259:012:05:182
229111991913,4cyclictest252-21systemd-journal08:55:182
229108991916,2cyclictest384942-21kworker/u8:2+flush-259:010:35:161
229108991915,3cyclictest384942-21kworker/u8:2+events_unbound11:00:121
229108991915,3cyclictest333668-21apt-get08:50:101
229108991915,3cyclictest307147-21kworker/u8:0+flush-259:009:15:201
229108991913,4cyclictest252-21systemd-journal09:55:001
22910599190,17cyclictest509-21rs:main0
229115991815,2cyclictest296724-21sh08:15:003
229115991814,2cyclictest437982-21irqcore10:30:153
229115991813,3cyclictest252-21systemd-journal10:24:593
22911199187,9cyclictest0-21swapper/208:30:232
22911199181,6cyclictest270818-21cron07:49:592
229111991814,3cyclictest571888-21turbostat.cron12:39:592
229111991810,7cyclictest500-21systemd-logind12:30:002
229108991814,2cyclictest0-21swapper/109:45:011
229108991814,2cyclictest0-21swapper/108:35:011
229108991812,4cyclictest333408-21latency_hist08:50:011
229105991811,5cyclictest410233-21ntpq10:00:200
22910599180,17cyclictest1-21systemd08:26:170
22910599180,16cyclictest442479-21munin-run10:34:590
229115991714,2cyclictest229724-21irqcore07:10:163
22911199177,8cyclictest0-21swapper/209:55:012
22911199176,10cyclictest551229-21cut12:20:122
22911199176,10cyclictest281482-21cpuspeed_turbos08:00:122
22911199175,10cyclictest304786-21cut08:20:182
22911199174,2cyclictest507-21in:imuxsock07:45:012
22911199171,5cyclictest395257-21awk09:50:012
22911199171,4cyclictest260055-21gpgv07:40:012
22911199171,3cyclictest252-21systemd-journal07:54:592
22911199170,5cyclictest348853-21awk09:05:012
22911199170,4cyclictest452744-21awk10:45:002
22911199170,14cyclictest514792-21latency_hist11:45:002
229108991714,2cyclictest494087-21kworker/u8:0+flush-259:011:55:001
229108991714,2cyclictest307147-21kworker/u8:0+events_unbound09:00:171
229108991714,2cyclictest265862-21kworker/u8:3+flush-259:007:55:231
229108991713,3cyclictest525300-21kworker/u8:1+flush-259:012:10:261
229108991713,3cyclictest431414-21kworker/u8:3+flush-259:010:45:001
229108991713,3cyclictest384942-21kworker/u8:2+events_unbound10:53:371
229108991713,3cyclictest359163-21kworker/u8:1+flush-259:009:25:211
229105991713,3cyclictest252-21systemd-journal08:10:000
229105991712,3cyclictest244593-21cron07:25:000
22910599171,15cyclictest1-21systemd11:16:180
229105991711,4cyclictest252-21systemd-journal12:30:180
229105991710,5cyclictest385376-21diskstats09:40:150
229115991610,4cyclictest252-21systemd-journal09:25:183
22911199165,4cyclictest513-21gdbus12:15:012
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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