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2026-04-25 - 10:33

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #5, 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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  Intel
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, lowest P state: ondemand
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rack5slot4s.osadl.org (updated Sat Apr 25, 2026 00:44:15)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
4135143996959,7cyclictest136747-21kworker/u8:0+flush-8:023:01:181
4135143996353,8cyclictest95428-21kworker/u8:1+flush-8:021:51:251
1898372590,1sleep0189842-21cut23:16:130
4135143995848,7cyclictest211597-21apt-get23:40:001
4135148995750,5cyclictest191660-21gpgv23:20:002
4135139995753,3cyclictest106565-21kworker/u8:3+events_unbound22:36:100
4135143995650,4cyclictest212085-21kworker/u8:3+flush-8:023:51:261
4135143995650,4cyclictest212085-21kworker/u8:3+flush-8:023:51:261
4135143995551,3cyclictest4093176-21kworker/u8:3+flush-8:019:16:221
4135143995548,6cyclictest4186742-21kworker/u8:1+flush-8:020:41:181
4135139995550,4cyclictest197031-21kworker/u8:1+events_unbound23:36:110
4135143995450,3cyclictest106565-21kworker/u8:3+events_unbound22:21:241
4135143995447,5cyclictest4087679-21kworker/u8:2+events_unbound20:01:201
4135139995448,4cyclictest62356-21kworker/u8:0+events_unbound21:31:180
4135148995343,7cyclictest237098-21cp00:05:012
4135143995346,5cyclictest161528-21kworker/u8:2+events_unbound23:06:241
4135143995345,6cyclictest191696-21kworker/u8:0+events_unbound23:31:221
4135143995246,5cyclictest95428-21kworker/u8:1+flush-8:022:41:201
4135143995246,5cyclictest62356-21kworker/u8:0+flush-8:021:31:241
4135143995246,4cyclictest4087679-21kworker/u8:2+flush-8:019:36:251
4135139995249,2cyclictest136747-21kworker/u8:0+events_unbound22:51:110
4135143995145,4cyclictest212085-21kworker/u8:3+flush-8:000:21:201
4135143995143,6cyclictest136747-21kworker/u8:0+flush-8:022:51:221
4135143995138,5cyclictest52200-21kworker/u8:2+flush-8:021:56:111
4135139995147,3cyclictest112038-21kworker/u8:0+events_unbound22:01:120
4135143995045,4cyclictest212085-21kworker/u8:3+events_unbound00:31:231
4135143995042,6cyclictest212085-21kworker/u8:3+events_unbound00:16:221
4135139995044,4cyclictest212085-21kworker/u8:3+events_unbound23:51:230
4135139995044,4cyclictest212085-21kworker/u8:3+events_unbound23:51:220
341142500,6chrt0-21swapper/220:41:142
41541282490,2sleep3471rcuc/319:26:153
4135148994939,7cyclictest280-21systemd-journal23:05:002
4135139994945,3cyclictest231906-21kworker/u8:4+events_unbound00:16:080
4135139994934,10cyclictest280-21systemd-journal20:13:170
4135143994843,3cyclictest4087679-21kworker/u8:2+flush-8:019:11:141
4135143994842,4cyclictest7628-21kworker/u8:0+flush-8:020:46:171
4135143994841,5cyclictest4171638-21kworker/u8:3+flush-8:020:31:191
4135143994840,6cyclictest181319-21kworker/u8:4+flush-8:023:11:211
4135143994743,3cyclictest4156839-21kworker/u8:0+events_unbound19:46:171
4135143994742,4cyclictest4087679-21kworker/u8:2+flush-8:020:06:181
4135143994742,3cyclictest106565-21kworker/u8:3+events_unbound22:31:191
4135143994740,4cyclictest7628-21kworker/u8:0+flush-8:020:51:171
4135143994641,4cyclictest4186742-21kworker/u8:1+flush-8:020:56:231
4135143994641,3cyclictest136747-21kworker/u8:0+events_unbound22:46:241
4135143994640,5cyclictest212085-21kworker/u8:3+flush-8:023:46:211
4135143994639,5cyclictest52200-21kworker/u8:2+events_unbound21:16:171
4135139994643,2cyclictest95428-21kworker/u8:1+events_unbound23:05:040
4135143994540,4cyclictest4186742-21kworker/u8:1+flush-8:020:26:191
4135143994540,4cyclictest4186742-21kworker/u8:1+flush-8:020:26:191
4135143994538,6cyclictest4171638-21kworker/u8:3+events_unbound21:21:191
4135139994541,3cyclictest4171638-21kworker/u8:3+events_unbound21:11:270
4135139994535,7cyclictest280-21systemd-journal21:50:000
4135143994440,3cyclictest4125450-21kworker/u8:1+flush-8:019:31:201
4135143994438,4cyclictest7628-21kworker/u8:0+events_unbound21:01:201
4135143994437,4cyclictest62356-21kworker/u8:0+flush-8:021:36:211
4135139994437,4cyclictest171440-21true23:00:000
279622440,1chrt27963-21/usr/sbin/munin20:36:122
4135148994335,5cyclictest231652-40logrotate00:00:002
4135143994339,3cyclictest4087679-21kworker/u8:2+flush-8:019:56:201
4135143994339,3cyclictest4087679-21kworker/u8:2+events_unbound19:41:211
4135143994336,5cyclictest4171638-21kworker/u8:3+flush-8:020:16:191
4135139994340,2cyclictest7628-21kworker/u8:0+events_unbound20:47:180
4135139994339,3cyclictest62356-21kworker/u8:0+events_unbound21:25:180
4135139994339,3cyclictest106565-21kworker/u8:3+events_unbound22:40:380
4135139994332,9cyclictest32746-21diskstats20:41:090
4135143994238,3cyclictest52200-21kworker/u8:2+flush-8:021:11:191
4135143994237,4cyclictest267087-21kworker/u8:0+flush-8:000:36:091
4135143994237,3cyclictest106565-21kworker/u8:3+flush-8:022:26:181
4135143994235,5cyclictest112038-21kworker/u8:0+flush-8:022:01:181
4135143994233,7cyclictest125763-21ntpq22:11:191
4135139994239,2cyclictest231906-21kworker/u8:4+events_unbound00:39:400
4135139994238,3cyclictest95428-21kworker/u8:1+events_unbound23:12:490
4135139994238,3cyclictest161528-21kworker/u8:2+events_unbound23:01:420
4135143994135,4cyclictest62356-21kworker/u8:0+events_unbound21:30:011
4135139994138,2cyclictest191696-21kworker/u8:0+events_unbound23:56:110
4135139994137,3cyclictest62356-21kworker/u8:0+events_unbound21:35:180
4135139994137,3cyclictest52200-21kworker/u8:2+events_unbound21:17:290
4135139994137,3cyclictest231906-21kworker/u8:4+events_unbound00:20:170
4135139994134,5cyclictest4181914-21apt-get19:56:050
4135139994131,8cyclictest4165852-21ntpq19:36:170
4135148994023,3cyclictest212405-21cpuspeed_turbos23:41:082
4135143994036,3cyclictest212085-21kworker/u8:3+events_unbound00:11:191
4135139994037,2cyclictest4171638-21kworker/u8:3+events_unbound20:28:180
4135139994037,2cyclictest4171638-21kworker/u8:3+events_unbound20:28:180
4135139994036,3cyclictest7628-21kworker/u8:0+events_unbound21:02:250
4135139994036,3cyclictest4093176-21kworker/u8:3+events_unbound19:22:170
4135139994036,3cyclictest4087679-21kworker/u8:2+events_unbound19:50:380
4135139994036,3cyclictest212085-21kworker/u8:3+events_unbound00:04:160
4135139994032,5cyclictest106836-21latency_hist21:55:010
41347072404,9sleep20-21swapper/219:06:482
4135148993930,7cyclictest42146-21store20:50:012
4135143993934,3cyclictest95428-21kworker/u8:1+events_unbound22:06:111
4135143993934,3cyclictest95428-21kworker/u8:1+events_unbound22:06:101
4135143993933,5cyclictest197031-21kworker/u8:1+flush-8:023:26:211
4135143993929,7cyclictest101033-21ntpq21:46:191
4135139993935,3cyclictest52200-21kworker/u8:2+events_unbound21:57:380
4135139993935,3cyclictest52200-21kworker/u8:2+events_unbound21:42:360
4135139993935,3cyclictest246507-21kworker/u8:1+events_unbound00:27:170
4135139993935,3cyclictest212085-21kworker/u8:3+events_unbound23:40:390
4135139993934,4cyclictest4087679-21kworker/u8:2+events_unbound20:07:180
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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