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2026-06-01 - 22:12

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 Jun 01, 2026 12:44:08)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2738719994740,5cyclictest335557-21systemd-journal11:55:241
2738714994642,3cyclictest2966674-21latency_hist10:50:010
2738724994138,2cyclictest2993327-21kworker/u8:0+flush-259:011:25:172
2738719993733,3cyclictest2831657-21kworker/u8:3+flush-259:009:55:231
2738719993428,4cyclictest335557-21systemd-journal08:35:011
2738719993428,4cyclictest2993546-21/usr/sbin/munin11:15:151
2738719993428,4cyclictest2759549-21apt-get07:30:121
2738714993327,4cyclictest335557-21systemd-journal10:05:200
2738728993222,8cyclictest3034726-21latency_hist11:55:013
2738728993222,8cyclictest2915142-21cat10:00:013
2738724993226,4cyclictest335557-21systemd-journal09:35:292
2738719993227,4cyclictest2893484-21kworker/u8:1+flush-259:010:20:271
2738719993226,4cyclictest2899082-21latency_hist09:45:011
2738719993124,5cyclictest335557-21systemd-journal11:00:231
2738714993125,4cyclictest335557-21systemd-journal09:19:180
2738719993024,4cyclictest3019425-21/usr/sbin/munin11:40:121
2738719993024,4cyclictest2743844-21latency_hist07:15:001
2738714992926,2cyclictest2738710-21kworker/u8:1+flush-259:007:15:170
2738714992925,3cyclictest2716815-21kworker/u8:0+flush-259:007:10:170
2738714992924,3cyclictest2941077-21kworker/u8:3+flush-259:010:55:240
2738728992822,5cyclictest2764403-21latency_hist07:35:003
2738724992823,4cyclictest3003759-21latency_hist11:25:012
2738714992825,2cyclictest2841990-21kworker/u8:0+flush-259:010:00:160
2738728992721,4cyclictest3081071-21latency_hist12:40:003
2738728992720,5cyclictest335557-21systemd-journal11:04:593
2738714992721,4cyclictest2847148-21latency_hist08:55:000
2738728992620,4cyclictest3055618-21apt-get12:15:113
2738724992621,3cyclictest2893966-21base6409:40:022
2738719992621,3cyclictest2801061-21apt-get08:10:111
2738719992621,3cyclictest2801061-21apt-get08:10:111
2738719992618,6cyclictest2765074-21/usr/sbin/munin07:35:141
2738714992622,2cyclictest1-21systemd07:36:440
2738714992618,5cyclictest2830834-21ntpq08:35:220
2738724992520,4cyclictest335557-21systemd-journal10:36:232
2738724992520,4cyclictest335557-21systemd-journal10:36:222
2738724992519,4cyclictest2811363-21apt-get08:20:122
2738724992514,9cyclictest509-21rs:main2
2738719992418,4cyclictest2904242-21kworker/u8:2+flush-259:009:55:001
2738719992417,5cyclictest2993305-21latency_hist11:15:001
2738714992417,5cyclictest2758462-21ntpq07:25:230
2738728992319,3cyclictest2764929-21base6407:35:013
2738728992318,3cyclictest3060761-21apt-get12:20:123
2738728992314,8cyclictest2988809-21irqcore11:10:173
2738724992318,3cyclictest335557-21systemd-journal09:49:202
2738719992319,3cyclictest2841990-21kworker/u8:0+events_unbound10:30:241
2738719992319,3cyclictest2841990-21kworker/u8:0+events_unbound10:30:241
2738719992316,5cyclictest335557-21systemd-journal09:15:011
2738714992317,4cyclictest3040342-21diskstats12:00:130
2738714992317,4cyclictest2982128-21ntpq11:00:220
2738728992219,2cyclictest2790499-21kworker/u8:3+flush-259:008:15:173
2738728992216,4cyclictest2872848-21latency_hist09:20:013
2738728992214,7cyclictest2831657-21kworker/u8:3+flush-259:009:05:223
2738719992218,3cyclictest2993327-21kworker/u8:0+flush-259:011:35:141
2738719992218,3cyclictest2941077-21kworker/u8:3+events_unbound10:55:241
2738719992218,3cyclictest2831657-21kworker/u8:3+flush-259:009:45:211
2738719992214,5cyclictest2946030-21latency_hist10:30:001
2738714992218,3cyclictest2831657-21kworker/u8:3+flush-259:009:50:230
2738714992217,3cyclictest335557-21systemd-journal09:55:170
2738714992216,4cyclictest335557-21systemd-journal11:40:390
2738724992115,4cyclictest2946459-21diskstats10:30:152
2738724992115,4cyclictest2946459-21diskstats10:30:142
2738719992116,4cyclictest2738710-21kworker/u8:1+events_unbound07:15:241
2738719992116,3cyclictest2738710-21kworker/u8:1+events_unbound07:25:171
2738714992116,3cyclictest2805994-21kworker/u8:1+flush-259:009:00:010
2738714992114,5cyclictest2893452-21latency_hist09:40:020
2738728992016,3cyclictest2775105-21kworker/u8:2+flush-259:008:40:213
2738724992016,3cyclictest2941077-21kworker/u8:3+flush-259:011:15:242
2738724992016,3cyclictest2893484-21kworker/u8:1+flush-259:010:20:172
2738724992015,3cyclictest3029549-21awk11:50:012
2738724992011,8cyclictest0-21swapper/210:30:002
2738719992017,2cyclictest3081075-21latency_hist12:40:001
2738719992017,2cyclictest3066623-21irqcore12:25:171
2738719992016,3cyclictest2951237-21kworker/u8:4+events_unbound12:00:231
2738719992015,3cyclictest3029819-21apt-get11:50:111
2738719992014,4cyclictest2887443-21ntpq09:30:201
2738714992014,4cyclictest2941112-21apt-get10:25:110
2738714992013,5cyclictest3002892-21ntpq11:20:230
2738728991915,3cyclictest335557-21systemd-journal10:40:003
2738728991915,3cyclictest335557-21systemd-journal10:39:593
2738728991915,3cyclictest2738710-21kworker/u8:1+flush-259:007:45:143
2738728991914,4cyclictest335557-21systemd-journal12:30:003
2738728991910,8cyclictest0-21swapper/309:20:163
273872499193,4cyclictest2759292-21idleruntime-cro07:29:592
273871999192,8cyclictest2920160-21munin-run10:04:591
2738719991915,3cyclictest3045289-21kworker/u8:3+events_unbound12:05:231
2738719991915,3cyclictest2738710-21kworker/u8:1+events_unbound07:45:211
2738719991914,4cyclictest2888600-21apt-get09:35:121
2738719991913,4cyclictest2780464-21/usr/sbin/munin07:50:201
2738719991912,5cyclictest2799935-21ntpq08:05:251
2738719991912,5cyclictest2799935-21ntpq08:05:241
2738719991912,5cyclictest2738657-21latency_hist07:10:011
2738719991911,6cyclictest335557-21systemd-journal07:44:591
2738714991915,2cyclictest0-21swapper/008:35:010
2738714991912,5cyclictest3065632-21latency_hist12:25:000
2738728991816,1cyclictest0-21swapper/311:45:013
2738728991815,2cyclictest2738950-21apt-get07:10:133
2738728991812,4cyclictest2925622-21apt-get10:10:093
273872899180,2cyclictest2821541-21cat08:30:003
273872499187,10cyclictest2868141-21cpuspeed_turbos09:15:142
273872499186,1cyclictest0-21swapper/207:10:202
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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