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2026-03-10 - 01:49

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 Mon Mar 09, 2026 12:44:07)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2160449994842,4cyclictest2305409-21latency_hist09:30:013
2160443994741,4cyclictest2362170-21latency_hist10:25:011
2160443994543,1cyclictest2258213-21fwupd08:42:091
2160439993832,4cyclictest2289944-21latency_hist09:15:000
2160443993631,4cyclictest2253276-21latency_hist08:40:021
2160447993329,3cyclictest252-21systemd-journal09:10:002
2160439993327,4cyclictest2341913-21diskstats10:05:140
2160439993125,4cyclictest2217129-21latency_hist08:05:000
2160449992926,2cyclictest2243036-21kworker/u8:1+flush-259:009:49:593
2160447992924,3cyclictest2263668-21kworker/u8:3+flush-259:009:25:002
2160439992923,4cyclictest2434931-21latency_hist11:35:000
2160443992823,3cyclictest2481653-21/usr/sbin/munin12:20:151
2160449992722,4cyclictest252-21systemd-journal11:45:003
2160439992725,1cyclictest2253378-21kworker/0:2+pm08:42:100
2160447992520,4cyclictest252-21systemd-journal08:42:112
2160443992520,4cyclictest252-21systemd-journal08:05:001
2160443992419,3cyclictest252-21systemd-journal11:20:081
2160447992317,4cyclictest252-21systemd-journal08:35:002
2160443992319,3cyclictest2388219-21apt-get10:50:131
2160439992320,2cyclictest2227544-21kworker/u8:2+events_unbound08:50:010
2160439992319,3cyclictest2181366-21apt-get07:30:100
2160439992319,3cyclictest2160614-21kworker/u8:4+flush-259:007:15:170
2160439992319,3cyclictest2160614-21kworker/u8:4+flush-259:007:15:160
2160439992319,2cyclictest490-21dbus-daemon11:45:000
2160439992316,5cyclictest2387940-21latency_hist10:50:010
2160449992216,4cyclictest2315744-21latency_hist09:40:013
2160447992215,4cyclictest252-21systemd-journal07:40:002
2160443992217,3cyclictest2263647-21apt-get08:50:001
2160439992219,2cyclictest2409132-21kworker/u8:3+flush-259:011:39:590
2160449992117,3cyclictest2460740-21kworker/u8:3+events_unbound12:10:203
2160449992117,3cyclictest2460740-21kworker/u8:3+events_unbound12:10:203
2160449992117,3cyclictest2393178-21munin-plugin-st10:55:013
2160449992115,4cyclictest2486599-21latency_hist12:25:013
2160447992116,3cyclictest2295099-21latency_hist09:20:002
2160439992117,3cyclictest2429973-21kworker/u8:4+flush-259:012:35:250
2160439992117,2cyclictest2275103-21irqcore09:00:160
2160439992115,4cyclictest2491788-21cron12:30:000
2160449992017,2cyclictest2409376-21apt-get11:10:143
2160449992014,4cyclictest2455581-21latency_hist11:55:003
2160449992014,4cyclictest2367773-21diskstats10:30:143
2160447992018,1cyclictest2269256-21idleruntime-cro08:55:012
2160447992017,2cyclictest2429973-21kworker/u8:4+flush-259:012:00:002
216044399205,7cyclictest2326033-21munin-plugin-st09:50:001
2160443992014,4cyclictest2300264-21latency_hist09:25:011
2160439992016,3cyclictest2196511-21kworker/u8:1+flush-259:008:15:180
2160449991916,2cyclictest2263668-21kworker/u8:3+flush-259:008:50:133
216043999191,16cyclictest1-21systemd11:46:080
2160449991815,2cyclictest2326039-21kworker/u8:3+flush-259:009:50:193
2160449991815,2cyclictest2243036-21kworker/u8:1+flush-259:008:40:193
2160447991811,5cyclictest2429748-21grep11:29:592
2160443991815,2cyclictest2409132-21kworker/u8:3+flush-259:011:15:171
2160443991813,4cyclictest2268337-21ntpq08:50:211
2160443991812,4cyclictest2226612-21ntpq08:10:231
2160439991814,3cyclictest2160614-21kworker/u8:4+flush-259:007:15:000
2160439991814,2cyclictest0-21swapper/010:55:010
2160439991813,3cyclictest2445439-21kworker/u8:2+flush-259:012:05:140
2160439991811,5cyclictest252-21systemd-journal09:54:590
2160449991714,2cyclictest2409132-21kworker/u8:3+flush-259:011:25:233
2160449991713,3cyclictest2398406-21kworker/u8:1+flush-259:011:00:243
2160449991712,3cyclictest252-21systemd-journal11:46:083
2160449991710,5cyclictest2491807-21latency_hist12:30:013
2160443991715,1cyclictest2372477-21idleruntime-cro10:35:001
2160443991714,2cyclictest2346636-21latency_hist10:09:591
2160443991714,2cyclictest2310528-21idleruntime-cro09:34:591
2160443991713,3cyclictest2351828-21kworker/u8:0+flush-259:010:15:241
2160443991713,2cyclictest0-21swapper/109:10:001
2160439991714,2cyclictest60350irq/132-enp0s29f1:rx-010:10:230
2160439991714,2cyclictest2211991-21kworker/u8:2+events_unbound08:05:220
2160439991713,3cyclictest2445230-21kworker/u8:0+flush-259:012:15:000
2160439991713,3cyclictest2445230-21kworker/u8:0+flush-259:012:15:000
2160439991713,3cyclictest2296387-21sed09:20:170
2160439991713,2cyclictest0-21swapper/010:30:190
2160439991712,3cyclictest2221936-21kworker/u8:0+flush-259:008:20:160
2160439991711,4cyclictest509-21rs:main0
2160439991711,4cyclictest509-21rs:main0
2160439991711,4cyclictest252-21systemd-journal11:25:010
2160449991613,2cyclictest2207500-21irqcore07:55:143
2160449991612,3cyclictest2243036-21kworker/u8:1+flush-259:009:19:593
2160449991610,5cyclictest2263647-21apt-get08:50:003
216044799169,5cyclictest2175913-21latency_hist07:25:002
2160447991613,2cyclictest2289939-21sh09:15:002
2160447991612,3cyclictest2460740-21kworker/u8:3+flush-259:012:20:002
2160447991612,3cyclictest2460740-21kworker/u8:3+flush-259:012:19:592
2160447991612,2cyclictest0-21swapper/209:49:592
2160447991610,4cyclictest2347068-21diskstats10:10:152
2160443991613,2cyclictest2409132-21kworker/u8:3+flush-259:011:25:251
2160443991613,2cyclictest2362395-21kworker/u8:4+events_unbound10:45:171
2160443991612,3cyclictest2372497-21kworker/u8:0+flush-259:011:05:011
2160443991612,3cyclictest2211991-21kworker/u8:2+events_unbound08:05:091
2160443991610,5cyclictest2205928-21ntpq07:50:191
216043999169,6cyclictest2310563-21kworker/u8:0-events_unbound09:40:000
2160439991614,1cyclictest60350irq/132-enp0s29f1:rx-011:15:150
2160439991614,1cyclictest60350irq/132-enp0s29f1:rx-007:45:160
2160439991613,2cyclictest61150irq/133-enp0s29f1:tx-010:15:230
2160439991613,2cyclictest60350irq/132-enp0s29f1:rx-012:34:540
2160439991613,2cyclictest60350irq/132-enp0s29f1:rx-010:40:200
2160439991613,2cyclictest60350irq/132-enp0s29f1:rx-007:35:230
2160439991610,4cyclictest2398782-21latency_hist11:00:000
2160449991512,2cyclictest2227544-21kworker/u8:2+flush-259:008:30:013
2160447991511,3cyclictest500-21systemd-logind09:30:002
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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