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2026-05-18 - 01:01

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 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 Sun May 17, 2026 12:44:04)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
787898993731,4cyclictest922943-21apt-get09:20:111
787894993734,2cyclictest871026-21kworker/u8:2+flush-259:008:30:240
787902993629,5cyclictest1094375-21latency_hist12:05:012
787902993430,3cyclictest1016256-21kworker/u8:1+flush-259:011:10:272
787902993328,3cyclictest938177-21latency_hist09:35:002
787904993225,5cyclictest953661-21latency_hist09:50:003
787902993127,3cyclictest1068230-21gpgv11:39:592
787894993126,4cyclictest1042257-21cp11:15:020
787894992926,2cyclictest1016501-21apt-get10:50:100
787898992824,3cyclictest839802-21apt-get08:00:161
787898992723,3cyclictest1079136-21apt-get11:50:111
787904992516,6cyclictest875332-21ntpq08:30:213
787902992521,3cyclictest881688-21kworker/u8:5+flush-259:009:15:172
787894992519,4cyclictest1078868-21latency_hist11:50:000
787904992419,4cyclictest943601-21apt-get09:40:143
787898992418,4cyclictest886604-21latency_hist08:45:021
787904992316,4cyclictest974142-21apt-get10:10:003
78790299239,6cyclictest876235-21munin-run08:35:012
787904992217,4cyclictest990045-21kworker/u8:2+flush-259:011:00:173
787894992217,3cyclictest252-21systemd-journal11:10:000
787904992115,4cyclictest1000351-21apt-get10:35:003
787904992114,5cyclictest927819-21latency_hist09:25:003
787904992114,5cyclictest845308-21cp08:05:023
787902992117,3cyclictest990045-21kworker/u8:2+flush-259:011:00:262
787902992115,4cyclictest839524-21awk08:00:002
787902992110,3cyclictest990016-21sh10:25:012
787898992116,4cyclictest974142-21apt-get10:10:001
787898992116,3cyclictest850625-21apt-get08:10:131
787894992116,4cyclictest1073699-21latency_hist11:45:010
787904992016,3cyclictest912350-21kworker/u8:1+flush-259:010:20:283
787904992015,3cyclictest990045-21kworker/u8:2+events_unbound10:35:173
787904992015,3cyclictest917756-21apt-get09:15:133
787902992016,3cyclictest938436-21apt-get09:35:112
787902992016,3cyclictest787878-21kworker/u8:3+flush-259:008:15:162
787902992015,4cyclictest1047814-21apt-get11:20:122
787894992017,2cyclictest990045-21kworker/u8:2+flush-259:010:40:180
787894992017,2cyclictest1057849-21kworker/u8:2+flush-259:011:35:260
787904991914,4cyclictest865875-21kworker/u8:0+flush-259:009:05:013
787904991914,3cyclictest1042423-21cp11:15:023
787902991915,2cyclictest1021364-21idleruntime-cro10:55:012
787898991916,2cyclictest824008-21idleruntime-cro07:45:001
787898991914,4cyclictest834664-21apt-get07:55:111
787894991917,1cyclictest0-21swapper/012:10:000
787894991916,2cyclictest808534-21kworker/u8:4+flush-259:008:15:010
787898991816,1cyclictest1120161-21cron12:30:001
787904991715,1cyclictest1109842-21kworker/u8:3+events_unbound12:20:013
787904991713,2cyclictest1122017-21kthreadcore12:30:173
787904991711,4cyclictest860955-21/usr/sbin/munin08:20:213
787904991710,5cyclictest252-21systemd-journal10:15:573
787902991715,1cyclictest0-21swapper/209:24:592
787902991715,1cyclictest0-21swapper/208:10:002
787902991715,1cyclictest0-21swapper/208:05:002
787902991714,2cyclictest1104816-21latency_hist12:15:012
787902991713,3cyclictest1032082-21diskstats11:05:152
787898991714,2cyclictest839557-21kworker/u8:1+flush-259:008:20:011
787898991713,2cyclictest0-21swapper/111:24:591
787898991712,3cyclictest788278-21fschecks_count07:10:151
787894991714,2cyclictest984874-21idleruntime-cro10:20:010
787894991714,2cyclictest61150irq/133-enp0s29f1:tx-010:11:570
787894991710,5cyclictest1000344-21latency_hist10:35:010
787904991613,2cyclictest958766-21munin-plugin-st09:55:003
787904991613,2cyclictest807607-21ntp_kernel_pll_07:25:213
787904991612,3cyclictest881688-21kworker/u8:5+flush-259:008:55:243
787904991611,3cyclictest912350-21kworker/u8:1+events_unbound10:25:143
787902991613,1cyclictest0-21swapper/210:35:002
787898991613,2cyclictest787878-21kworker/u8:3+flush-259:007:25:001
787898991612,2cyclictest1114068-21needreboot12:20:201
787898991610,5cyclictest933193-21kworker/u8:3+flush-259:010:35:011
787894991614,1cyclictest60350irq/132-enp0s29f1:rx-010:55:260
787894991614,1cyclictest60350irq/132-enp0s29f1:rx-008:44:320
787894991614,1cyclictest60350irq/132-enp0s29f1:rx-007:40:260
787894991613,2cyclictest61150irq/133-enp0s29f1:tx-009:00:180
787894991613,2cyclictest60350irq/132-enp0s29f1:rx-009:30:100
787894991613,2cyclictest60350irq/132-enp0s29f1:rx-007:47:540
787894991613,1cyclictest0-21swapper/012:04:590
787894991612,3cyclictest860980-21apt-get08:20:110
787894991610,4cyclictest1120182-21latency_hist12:30:010
78790499157,5cyclictest252-21systemd-journal11:50:003
787904991511,3cyclictest844748-21idleruntime-cro08:05:003
787904991511,3cyclictest787878-21kworker/u8:3+flush-259:007:35:183
787904991511,3cyclictest1084251-21kworker/u8:4+flush-259:012:10:173
787904991511,2cyclictest0-21swapper/308:50:013
78790299159,4cyclictest252-21systemd-journal07:20:002
78790299159,4cyclictest1047537-21latency_hist11:20:002
787902991512,2cyclictest817837-21needreboot07:35:192
787902991510,3cyclictest252-21systemd-journal10:35:032
787898991513,1cyclictest0-21swapper/111:50:001
787898991512,2cyclictest887122-21fschecks_time08:45:141
787898991511,3cyclictest933193-21kworker/u8:3+flush-259:009:45:461
78789499158,5cyclictest973270-21ntpq10:05:220
787894991514,1cyclictest60350irq/132-enp0s29f1:rx-008:49:300
787894991513,1cyclictest60350irq/132-enp0s29f1:rx-012:20:250
787894991513,1cyclictest60350irq/132-enp0s29f1:rx-011:25:230
787894991513,1cyclictest60350irq/132-enp0s29f1:rx-009:47:530
787894991513,1cyclictest60350irq/132-enp0s29f1:rx-009:05:250
78790499149,3cyclictest912308-21cron09:09:593
787904991411,2cyclictest881688-21kworker/u8:5+events_unbound09:15:013
787904991411,2cyclictest824483-21fschecks_count07:45:143
787904991410,2cyclictest0-21swapper/310:45:183
78790299149,4cyclictest881688-21kworker/u8:5+flush-259:008:40:072
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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