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2026-05-03 - 03:22

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 Sun May 03, 2026 00:44:04)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2614082994945,3cyclictest2781080-21kworker/u8:1+events_unbound21:51:071
2614088994338,3cyclictest2807408-21kworker/u8:1+flush-259:022:40:153
2614088994238,3cyclictest2603588-21kworker/u8:4+flush-259:020:10:203
2614076994235,5cyclictest2713880-21diskstats20:45:150
2614088994138,2cyclictest2671884-21kworker/u8:2+flush-259:020:25:213
2614088994138,2cyclictest2625263-21kworker/u8:2+events_unbound19:30:163
2614076994138,2cyclictest2666541-21kworker/u8:1+events_unbound20:00:240
2614076993936,2cyclictest2765941-21kworker/u8:0+flush-259:021:40:200
2614088993832,4cyclictest2760708-21cat21:30:013
2614082993834,2cyclictest2666541-21kworker/u8:1+events_unbound20:05:221
2614082993833,3cyclictest2724442-21apt-get20:55:111
2614076993835,2cyclictest2603588-21kworker/u8:4+flush-259:019:15:210
2614082993629,5cyclictest2889023-21ntpq23:30:191
2614088993533,1cyclictest2817511-21kworker/u8:2+events_unbound22:35:243
2614088993532,2cyclictest2905880-21kworker/u8:0+events_unbound00:23:053
2614088993532,2cyclictest2802021-21kworker/u8:2+events_unbound22:10:163
2614088993532,2cyclictest2765941-21kworker/u8:0+events_unbound22:15:163
2614082993529,5cyclictest2651549-21apt-get19:45:131
2614076993529,4cyclictest2771103-21latency_hist21:40:010
2614088993430,3cyclictest2581160-21kworker/u8:3+flush-259:019:10:213
2614082993431,2cyclictest2729356-21kworker/u8:3+flush-259:021:55:211
2614082993430,3cyclictest2625263-21kworker/u8:2+flush-259:019:25:211
2614076993430,3cyclictest2853750-21kworker/u8:0+flush-259:023:05:150
2614088993330,2cyclictest2853750-21kworker/u8:0+events_unbound23:15:233
2614088993330,2cyclictest2749936-21kworker/u8:4+flush-259:021:35:163
2614088993329,3cyclictest2895528-21kworker/u8:2+events_unbound00:10:003
2614088993328,3cyclictest2864307-21/usr/sbin/munin23:10:163
2614082993330,2cyclictest2807408-21kworker/u8:1+flush-259:022:25:001
2614076993330,2cyclictest2895741-21kworker/u8:4+flush-259:000:25:170
2614076993329,3cyclictest2671884-21kworker/u8:2+flush-259:020:25:050
2614082993229,2cyclictest2666541-21kworker/u8:1+flush-259:020:00:211
2614076993229,2cyclictest2650902-21kworker/u8:0+events_unbound19:50:010
2614076993226,4cyclictest2618566-21ntpq19:10:210
2614088993128,2cyclictest2729356-21kworker/u8:3+flush-259:021:45:213
2614088993127,3cyclictest2603588-21kworker/u8:4+events_unbound20:40:183
2614088993126,3cyclictest2620065-21base6419:15:013
2614085993124,5cyclictest2713449-21latency_hist20:45:012
2614082993128,3cyclictest2895741-21kworker/u8:4+events_unbound23:56:061
2614082993127,3cyclictest2729356-21kworker/u8:3+flush-259:021:30:171
2614082993126,4cyclictest2629417-21ntpq19:20:221
2614076993127,3cyclictest2682182-21kworker/u8:0+flush-259:020:30:160
2614088993024,4cyclictest2666706-21latency_hist20:00:013
2614085993025,3cyclictest2817511-21kworker/u8:2+flush-259:022:25:162
2614082993026,3cyclictest2603588-21kworker/u8:4+events_unbound20:20:191
2614082993026,3cyclictest2603588-21kworker/u8:4+events_unbound19:20:001
2614076993027,2cyclictest2905880-21kworker/u8:0+flush-259:000:10:250
2614076993027,2cyclictest2603588-21kworker/u8:4+flush-259:020:55:170
2614076993027,2cyclictest2603588-21kworker/u8:4+events_unbound20:50:140
2614076993026,3cyclictest2765941-21kworker/u8:0+flush-259:022:05:240
2614076993026,3cyclictest2729356-21kworker/u8:3+events_unbound21:10:230
2614088992926,2cyclictest2853750-21kworker/u8:0+flush-259:023:30:003
2614088992926,2cyclictest2603588-21kworker/u8:4+events_unbound19:40:233
2614088992925,3cyclictest2905880-21kworker/u8:0+flush-259:000:17:063
2614088992925,3cyclictest2729356-21kworker/u8:3+flush-259:021:20:203
2614088992924,4cyclictest2687324-21latency_hist20:20:003
2614082992926,2cyclictest2895528-21kworker/u8:2+flush-259:023:45:231
2614082992925,3cyclictest2729356-21kworker/u8:3+events_unbound21:14:071
2614082992925,3cyclictest2581160-21kworker/u8:3+events_unbound19:42:041
2614082992924,2cyclictest2895741-21kworker/u8:4+events_unbound00:30:141
2614076992926,2cyclictest2802021-21kworker/u8:2+flush-259:022:10:210
2614076992926,2cyclictest2729356-21kworker/u8:3+flush-259:021:50:160
2614085992823,3cyclictest2698021-21kworker/u8:1+flush-259:020:30:052
2614082992825,2cyclictest2853750-21kworker/u8:0+flush-259:023:05:241
2614082992825,2cyclictest2682182-21kworker/u8:0+events_unbound20:30:141
2614076992824,3cyclictest2895741-21kworker/u8:4+events_unbound00:23:090
2614076992822,5cyclictest252-21systemd-journal00:05:000
2614088992723,3cyclictest2879620-21kworker/u8:3+flush-259:023:30:053
2614088992723,3cyclictest2729356-21kworker/u8:3+events_unbound21:10:213
2614088992723,3cyclictest2555344-21kworker/u8:0+flush-259:019:25:003
2614088992721,4cyclictest2879602-21latency_hist23:25:003
2614085992723,3cyclictest2666541-21kworker/u8:1+flush-259:020:00:252
2614082992724,2cyclictest2671884-21kworker/u8:2+events_unbound20:10:131
2614082992724,2cyclictest2581160-21kworker/u8:3+flush-259:019:10:211
2614082992723,3cyclictest2640833-21apt-get19:35:121
2614082992722,3cyclictest2581160-21kworker/u8:3+flush-259:019:35:001
2614076992724,2cyclictest2625263-21kworker/u8:2+events_unbound19:35:240
2614076992724,2cyclictest2603588-21kworker/u8:4+events_unbound20:35:230
2614076992723,3cyclictest252-21systemd-journal21:50:010
2614076992719,6cyclictest2904977-21ntpq23:45:200
2614088992623,2cyclictest2895741-21kworker/u8:4+flush-259:000:25:253
2614088992623,2cyclictest2843419-21kworker/u8:3+events_unbound23:03:053
2614088992623,2cyclictest2625263-21kworker/u8:2+events_unbound19:37:133
2614088992623,2cyclictest2603588-21kworker/u8:4+events_unbound20:20:143
2614088992622,3cyclictest2682182-21kworker/u8:0+events_unbound20:30:223
2614085992621,3cyclictest2671884-21kworker/u8:2+flush-259:020:10:152
2614085992619,5cyclictest252-21systemd-journal21:35:052
2614082992622,3cyclictest2603588-21kworker/u8:4+events_unbound20:50:241
2614082992622,3cyclictest2603588-21kworker/u8:4+events_unbound20:44:071
2614076992623,2cyclictest2853750-21kworker/u8:0+events_unbound23:12:050
2614076992623,2cyclictest2625263-21kworker/u8:2+events_unbound19:30:220
2614076992621,4cyclictest252-21systemd-journal21:30:000
2614088992522,2cyclictest2765941-21kworker/u8:0+events_unbound22:05:233
2614088992522,2cyclictest2765941-21kworker/u8:0+events_unbound21:40:243
2614085992520,4cyclictest2817511-21kworker/u8:2+flush-259:022:55:172
2614082992522,2cyclictest2895741-21kworker/u8:4+flush-259:000:20:211
2614082992519,4cyclictest2878686-21ntpq23:20:201
2614076992522,2cyclictest2853750-21kworker/u8:0+events_unbound23:19:060
2614076992521,3cyclictest2625263-21kworker/u8:2+events_unbound19:27:050
2614088992422,1cyclictest2729356-21kworker/u8:3+flush-259:021:55:193
2614088992421,2cyclictest2807408-21kworker/u8:1+flush-259:022:20:163
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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