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2026-05-14 - 05:09

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 Thu May 14, 2026 00:44:06)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
77264994945,3cyclictest223204-21kworker/u8:2+events_unbound21:30:132
77264994744,2cyclictest109000-21kworker/u8:0+events_unbound20:25:212
77264994743,3cyclictest109000-21kworker/u8:0+events_unbound19:56:532
77264994741,3cyclictest389186-21kworker/u8:0+events_unbound00:20:232
77264994541,3cyclictest109000-21kworker/u8:0+flush-259:019:46:542
77264994441,2cyclictest223204-21kworker/u8:2+events_unbound23:05:232
77264994441,2cyclictest171092-21kworker/u8:1+events_unbound20:42:032
77262994441,2cyclictest212908-21kworker/u8:3+flush-259:022:20:200
77262994440,3cyclictest181497-21kworker/u8:2+events_unbound21:00:210
77267994336,5cyclictest114113-21latency_hist19:45:013
77264994339,3cyclictest98707-21kworker/u8:1+events_unbound19:41:442
77264994239,2cyclictest98707-21kworker/u8:1+events_unbound19:30:232
77264994239,2cyclictest212908-21kworker/u8:3+events_unbound22:05:162
77262994241,1cyclictest223257-21kworker/0:0+pm22:04:280
77264994138,3cyclictest98707-21kworker/u8:1+events_unbound19:35:432
77264994138,2cyclictest305735-21kworker/u8:1+events_unbound23:35:242
77264994037,2cyclictest223204-21kworker/u8:2+events_unbound21:54:432
77264994037,2cyclictest155759-21kworker/u8:2+events_unbound20:30:452
77264994037,2cyclictest140298-21kworker/u8:3+events_unbound20:47:432
77264994036,3cyclictest368092-21kworker/u8:2+events_unbound00:14:432
77267993935,3cyclictest305735-21kworker/u8:1+flush-259:023:55:003
77267993835,2cyclictest82492-21gpgv19:15:003
77267993835,2cyclictest326823-21kworker/u8:3+flush-259:023:49:593
77264993836,2cyclictest155759-21kworker/u8:2+events_unbound20:37:022
77264993835,2cyclictest305735-21kworker/u8:1+events_unbound23:15:152
77264993835,2cyclictest223204-21kworker/u8:2+flush-259:022:52:442
77264993834,3cyclictest98707-21kworker/u8:1+events_unbound20:15:242
77262993835,2cyclictest155759-21kworker/u8:2+flush-259:020:26:590
77264993735,2cyclictest223204-21kworker/u8:2+events_unbound22:40:222
77264993734,2cyclictest305735-21kworker/u8:1+events_unbound23:12:452
77264993734,2cyclictest212908-21kworker/u8:3+events_unbound21:56:442
77262993731,4cyclictest398988-21ntpq00:15:200
77264993634,2cyclictest98707-21kworker/u8:1+events_unbound20:01:422
77264993633,2cyclictest285013-21kworker/u8:0+events_unbound22:36:452
77262993632,3cyclictest326823-21kworker/u8:3+events_unbound23:35:010
77264993533,2cyclictest212908-21kworker/u8:3+events_unbound22:45:232
77264993533,2cyclictest109000-21kworker/u8:0+events_unbound19:50:122
77264993532,2cyclictest61950-21kworker/u8:3+events_unbound19:28:442
77264993532,2cyclictest212908-21kworker/u8:3+events_unbound22:19:432
77262993533,2cyclictest98707-21kworker/u8:1+flush-259:020:10:000
77262993533,2cyclictest98707-21kworker/u8:1+flush-259:020:09:590
77262993532,2cyclictest98707-21kworker/u8:1+flush-259:019:50:190
77262993531,3cyclictest61950-21kworker/u8:3+events_unbound19:17:440
77264993431,2cyclictest109000-21kworker/u8:0+events_unbound21:10:222
77264993430,3cyclictest212908-21kworker/u8:3+events_unbound22:58:442
77262993431,2cyclictest61950-21kworker/u8:3+events_unbound19:35:230
77267993329,3cyclictest410191-21gpgv00:30:003
77267993329,3cyclictest410191-21gpgv00:30:003
77267993327,4cyclictest509-21rs:main3
77267993326,5cyclictest207719-21latency_hist21:15:013
77263993327,4cyclictest252-21systemd-journal20:12:431
77262993330,2cyclictest223204-21kworker/u8:2+flush-259:021:55:210
77262993330,2cyclictest223204-21kworker/u8:2+flush-259:021:50:200
77264993230,2cyclictest326823-21kworker/u8:3+events_unbound23:30:432
77263993229,2cyclictest155759-21kworker/u8:2+flush-259:020:25:441
77263993228,3cyclictest399758-21kworker/u8:1+flush-259:000:21:441
77262993229,2cyclictest98707-21kworker/u8:1+events_unbound20:00:430
77262993229,2cyclictest410819-21kworker/u8:3+events_unbound00:36:450
77262993229,2cyclictest109000-21kworker/u8:0+events_unbound19:55:190
77262993228,3cyclictest368092-21kworker/u8:2+flush-259:000:10:180
77267993127,3cyclictest223204-21kworker/u8:2+flush-259:022:10:143
77264993129,2cyclictest305735-21kworker/u8:1+events_unbound23:03:442
77264993128,2cyclictest326823-21kworker/u8:3+events_unbound23:21:442
77264993128,2cyclictest197417-21kworker/u8:1+events_unbound21:15:162
77263993129,1cyclictest259150-21fwupd22:04:281
77263993124,6cyclictest109000-21kworker/u8:0+flush-259:021:20:141
77262993128,3cyclictest212908-21kworker/u8:3+events_unbound21:32:450
77262993128,2cyclictest410819-21kworker/u8:3+events_unbound00:32:440
77262993128,2cyclictest109000-21kworker/u8:0+flush-259:020:30:160
77262993127,3cyclictest305735-21kworker/u8:1+events_unbound23:28:440
77267993025,4cyclictest285013-21kworker/u8:0+flush-259:022:40:003
77267993025,3cyclictest394426-21gpgv00:15:003
77267993024,4cyclictest275153-21diskstats22:20:133
77264993027,2cyclictest326823-21kworker/u8:3+flush-259:000:05:262
77264993027,2cyclictest212908-21kworker/u8:3+events_unbound22:25:202
77264993026,3cyclictest326823-21kworker/u8:3+flush-259:023:25:152
77263993027,2cyclictest72152-21kworker/u8:0+events_unbound19:20:241
77263993026,3cyclictest155759-21kworker/u8:2+events_unbound20:32:441
77263993023,5cyclictest154815-21ntpq20:20:201
77262993024,2cyclictest197417-21kworker/u8:1+events_unbound21:15:180
77264992927,2cyclictest326823-21kworker/u8:3+events_unbound23:43:452
77264992927,2cyclictest109000-21kworker/u8:0+flush-259:021:05:252
77263992926,2cyclictest98707-21kworker/u8:1+flush-259:019:51:541
77263992925,3cyclictest140298-21kworker/u8:3+events_unbound20:55:211
77263992924,4cyclictest410852-21apt-get00:30:111
77263992924,4cyclictest252-21systemd-journal21:20:001
77262992926,2cyclictest305735-21kworker/u8:1+flush-259:023:35:210
77262992924,3cyclictest252-21systemd-journal20:19:440
77267992823,4cyclictest368092-21kworker/u8:2+flush-259:023:55:163
77267992822,4cyclictest326776-21latency_hist23:10:013
77263992822,5cyclictest135399-21apt-get20:05:111
77263992822,5cyclictest135399-21apt-get20:05:111
77263992821,5cyclictest242884-21ntpq21:45:211
77262992826,2cyclictest109000-21kworker/u8:0+events_unbound19:45:440
77262992825,2cyclictest98707-21kworker/u8:1+flush-259:019:30:440
77262992825,2cyclictest285013-21kworker/u8:0+flush-259:022:30:190
77262992825,2cyclictest109000-21kworker/u8:0+events_unbound21:06:440
77262992821,5cyclictest316872-21diskstats23:00:140
77267992722,4cyclictest368092-21kworker/u8:2+flush-259:000:10:013
77267992720,5cyclictest192231-21latency_hist21:00:013
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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