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2026-05-31 - 20:34

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 31, 2026 12:44:06)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3720679994945,3cyclictest3705376-21kworker/u8:1+events_unbound08:10:131
3720679994744,2cyclictest3887166-21gpgv09:50:001
3720679994643,2cyclictest3980995-21kworker/u8:4+events_unbound11:40:141
3720676994539,4cyclictest3828853-21ntpq08:50:210
3720684994438,4cyclictest3803798-21kworker/u8:0+flush-259:008:40:162
3720685994340,2cyclictest3803798-21kworker/u8:0+flush-259:009:00:223
3720679994339,3cyclictest3980995-21kworker/u8:4+events_unbound11:20:191
3720684994136,3cyclictest4001540-21kworker/u8:2+flush-259:012:05:192
3720685994037,2cyclictest3845171-21kworker/u8:3+flush-259:009:20:003
3720679993936,2cyclictest3865826-21kworker/u8:2+events_unbound10:25:231
3720679993936,2cyclictest3845171-21kworker/u8:3+events_unbound09:25:221
3720679993936,2cyclictest3768057-21kworker/u8:0+flush-259:008:00:231
3720679993936,2cyclictest3705376-21kworker/u8:1+flush-259:007:10:241
3720679993936,2cyclictest3705376-21kworker/u8:1+events_unbound08:00:001
3720679993936,2cyclictest3705376-21kworker/u8:1+events_unbound07:40:241
3720679993936,2cyclictest3705376-21kworker/u8:1+events_unbound07:35:191
3720685993835,2cyclictest3959821-21kworker/u8:0+flush-259:011:10:153
3720679993835,2cyclictest3803798-21kworker/u8:0+flush-259:008:30:271
3720676993835,2cyclictest3845171-21kworker/u8:3+flush-259:009:10:260
3720679993734,2cyclictest3814279-21kworker/u8:2+events_unbound08:45:251
3720679993734,2cyclictest3725798-21kworker/u8:2+flush-259:007:25:201
3720676993732,3cyclictest3959821-21kworker/u8:0+flush-259:011:10:160
3720685993633,2cyclictest3865826-21kworker/u8:2+events_unbound10:25:173
3720679993633,2cyclictest3898020-21kworker/u8:1+events_unbound11:00:211
3720679993633,2cyclictest3715114-21kworker/u8:3+flush-259:007:15:151
3720679993631,4cyclictest335557-21systemd-journal12:10:161
3720685993531,3cyclictest4001540-21kworker/u8:2+flush-259:011:55:243
3720685993529,4cyclictest4063361-21latency_hist12:40:013
3720679993532,2cyclictest3887005-21kworker/u8:0+events_unbound09:55:201
3720679993532,2cyclictest3887005-21kworker/u8:0+events_unbound09:55:191
3720679993532,2cyclictest3865826-21kworker/u8:2+events_unbound10:05:211
3720679993532,2cyclictest3803798-21kworker/u8:0+events_unbound09:05:231
3720679993528,5cyclictest3797777-21ntpq08:20:201
3720676993531,3cyclictest3934515-21apt-get10:35:120
3720679993432,2cyclictest4001540-21kworker/u8:2+flush-259:012:00:211
3720679993431,2cyclictest4042790-21kworker/u8:3+flush-259:012:25:201
3720679993431,2cyclictest3898020-21kworker/u8:1+events_unbound11:05:221
3720679993431,2cyclictest3803798-21kworker/u8:0+events_unbound09:00:201
3720679993431,2cyclictest3741848-21kworker/u8:4+flush-259:007:45:251
3720679993431,2cyclictest3741848-21kworker/u8:4+flush-259:007:45:251
3720685993329,3cyclictest3898020-21kworker/u8:1+flush-259:011:00:223
3720685993329,3cyclictest3768057-21kworker/u8:0+flush-259:008:14:383
3720679993331,2cyclictest3865826-21kworker/u8:2+flush-259:010:30:141
3720679993330,2cyclictest3865826-21kworker/u8:2+flush-259:010:20:011
3720679993330,2cyclictest3865826-21kworker/u8:2+events_unbound10:20:241
3720676993328,4cyclictest3928244-21ntpq10:25:210
3720685993227,4cyclictest3715114-21kworker/u8:3+flush-259:007:20:163
3720685993227,4cyclictest3705376-21kworker/u8:1+events_unbound07:10:213
3720679993230,2cyclictest3934119-21kworker/u8:3+events_unbound10:40:221
3720679993229,2cyclictest3793771-21kworker/u8:2+events_unbound08:25:221
3720679993228,3cyclictest4012057-21/usr/sbin/munin11:50:131
3720676993229,2cyclictest3898020-21kworker/u8:1+flush-259:010:05:250
3720676993227,4cyclictest3923105-21ntpq10:20:210
3720679993126,2cyclictest4001540-21kworker/u8:2+events_unbound12:35:281
3720676993127,3cyclictest3980995-21kworker/u8:4+events_unbound11:40:240
3720685993027,2cyclictest4042790-21kworker/u8:3+flush-259:012:30:153
3720685993027,2cyclictest4017211-21kworker/u8:1+events_unbound12:05:233
3720685993027,2cyclictest3934119-21kworker/u8:3+flush-259:010:40:243
3720685993025,3cyclictest3768057-21kworker/u8:0+flush-259:008:00:013
3720679993028,2cyclictest4001540-21kworker/u8:2+flush-259:012:05:151
3720679993028,2cyclictest3845171-21kworker/u8:3+events_unbound09:30:191
3720685992926,2cyclictest4042790-21kworker/u8:3+events_unbound12:25:233
3720685992926,2cyclictest4001540-21kworker/u8:2+flush-259:012:20:243
3720685992923,4cyclictest3954836-21latency_hist10:55:013
3720679992927,2cyclictest3768057-21kworker/u8:0+events_unbound08:05:171
3720679992926,2cyclictest3959821-21kworker/u8:0+events_unbound12:20:191
3720679992926,2cyclictest3814279-21kworker/u8:2+events_unbound08:57:341
3720676992925,3cyclictest3725798-21kworker/u8:2+events_unbound07:25:240
3720685992825,2cyclictest4001540-21kworker/u8:2+flush-259:012:15:143
3720685992825,2cyclictest3980995-21kworker/u8:4+flush-259:011:45:153
3720685992823,4cyclictest3715114-21kworker/u8:3+flush-259:007:15:163
3720679992825,2cyclictest3865826-21kworker/u8:2+events_unbound10:35:231
3720679992825,2cyclictest3865826-21kworker/u8:2+events_unbound10:00:141
3720679992825,2cyclictest3715114-21kworker/u8:3+events_unbound07:20:131
3720676992823,4cyclictest335557-21systemd-journal10:00:350
3720685992724,2cyclictest3865826-21kworker/u8:2+flush-259:010:35:163
3720685992723,3cyclictest3793771-21kworker/u8:2+events_unbound08:25:283
3720685992723,3cyclictest3725798-21kworker/u8:2+events_unbound07:25:223
3720685992720,3cyclictest3855665-21kworker/u8:1+events_unbound09:20:183
3720679992725,2cyclictest3959821-21kworker/u8:0+flush-259:011:10:241
3720679992724,3cyclictest3814279-21kworker/u8:2+events_unbound08:54:381
3720679992724,2cyclictest3959821-21kworker/u8:0+events_unbound11:15:201
3720679992723,3cyclictest3803798-21kworker/u8:0+flush-259:008:40:351
3720676992724,2cyclictest3959821-21kworker/u8:0+events_unbound11:20:120
3720676992724,2cyclictest3803798-21kworker/u8:0+events_unbound09:00:230
3720676992723,3cyclictest3855665-21kworker/u8:1+flush-259:009:34:590
3720676992721,4cyclictest3891723-21ntpq09:50:220
3720676992721,4cyclictest3773436-21diskstats08:00:150
3720685992623,2cyclictest3871622-21kworker/u8:4+events_unbound09:40:203
3720685992623,2cyclictest3855665-21kworker/u8:1+events_unbound09:35:233
3720679992623,2cyclictest4001540-21kworker/u8:2+events_unbound11:55:211
3720679992623,2cyclictest3980995-21kworker/u8:4+events_unbound11:34:351
3720679992623,2cyclictest3741848-21kworker/u8:4+events_unbound07:50:171
3720676992623,2cyclictest4001540-21kworker/u8:2+flush-259:011:50:140
3720685992522,3cyclictest3934119-21kworker/u8:3+events_unbound10:45:273
3720685992522,2cyclictest3980995-21kworker/u8:4+events_unbound11:40:363
3720685992522,2cyclictest3876849-21kworker/u8:3+flush-259:009:45:153
3720685992521,3cyclictest3705376-21kworker/u8:1+events_unbound07:30:213
3720685992521,3cyclictest3705376-21kworker/u8:1+events_unbound07:30:203
3720684992518,4cyclictest3959941-21latency_hist11:00:002
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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