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2026-09-17 - 11:49

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 Thu Sep 17, 2026 00:44:13)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
24027121750,5sleep30-21swapper/320:25:013
1912242880,3sleep375-21kworker/3:1-events19:39:073
163315997144,7cyclictest278-21systemd-journal20:25:010
3871342680,4sleep10-21swapper/122:54:091
4596422650,3chrt75-21kworker/3:1+events00:09:063
3364752560,2chrt471rcuc/322:04:083
163317995648,5cyclictest379820-21/usr/sbin/munin22:49:151
163317995647,7cyclictest269801-21latency_hist20:55:011
1753382550,2sleep3471rcuc/319:20:013
163315995243,7cyclictest284665-21kworker/u8:0+flush-8:023:14:180
163317995144,5cyclictest408896-21kworker/u8:1+events_unbound23:34:181
163317995142,7cyclictest284665-21kworker/u8:0+flush-8:022:39:181
163317994944,3cyclictest448731-21kworker/u8:3+flush-8:000:19:041
163317994940,6cyclictest219921-21latency_hist20:05:011
163315994939,8cyclictest314876-21/usr/sbin/munin21:44:110
163317994640,4cyclictest260193-21kworker/u8:2+flush-8:021:04:171
163317994540,4cyclictest234973-21kworker/u8:2+events_unbound20:40:011
163315994433,9cyclictest320087-21diskstats21:49:050
163317994335,6cyclictest319282-21latency_hist21:45:021
163315994335,6cyclictest413903-21latency_hist23:20:000
163315994231,8cyclictest278-21systemd-journal21:35:240
163317994126,12cyclictest278-21systemd-journal19:15:001
163321994031,7cyclictest334334-21awk22:00:002
163317994033,5cyclictest284665-21kworker/u8:0+flush-8:021:49:211
163317994029,8cyclictest278-21systemd-journal22:44:241
163315994035,3cyclictest215223-21kworker/u8:3+events_unbound21:24:100
2624642390,4sleep2381ktimers/220:49:072
163317993935,3cyclictest234973-21kworker/u8:2+flush-8:020:34:041
163317993934,4cyclictest210031-21kworker/u8:1+flush-8:021:14:061
163317993934,4cyclictest210031-21kworker/u8:1+flush-8:020:24:081
163317993933,4cyclictest260193-21kworker/u8:2+events_unbound20:49:051
163317993933,4cyclictest215223-21kworker/u8:3+flush-8:021:19:051
163317993931,6cyclictest284665-21kworker/u8:0+flush-8:021:59:171
163321993834,3cyclictest448731-21kworker/u8:3+flush-8:023:59:082
163317993830,6cyclictest163178-21kworker/u8:0+events_unbound19:49:161
163317993823,11cyclictest278-21systemd-journal20:20:001
163315993831,5cyclictest424343-21apt-get23:33:590
163317993729,6cyclictest210031-21kworker/u8:1+events_unbound22:10:021
163315993729,6cyclictest170678-21/usr/sbin/munin19:19:100
163315993728,7cyclictest339272-21latency_hist22:05:010
1587842371,7sleep013-21ksoftirqd/019:08:390
163317993631,4cyclictest255177-21kworker/u8:0+flush-8:020:44:031
163317993629,5cyclictest278-21systemd-journal19:38:251
163317993628,6cyclictest448731-21kworker/u8:3+flush-8:023:59:041
163317993627,6cyclictest284665-21kworker/u8:0+events_unbound00:29:121
163315993629,5cyclictest279688-21latency_hist21:05:000
163315993627,7cyclictest304241-21grep21:29:180
1586432364,11sleep10-21swapper/119:06:511
163317993530,3cyclictest408896-21kworker/u8:1+events_unbound23:19:091
163317993530,3cyclictest299468-21cron21:25:001
163317993528,5cyclictest399626-21apt-get23:08:581
163317993526,6cyclictest304407-21latency_hist21:30:011
163315993526,7cyclictest278-21systemd-journal22:30:000
16331599352,27cyclictest225109-21kworker/0:2+events21:14:010
163317993429,3cyclictest284665-21kworker/u8:0+events_unbound21:54:061
163317993427,5cyclictest284665-21kworker/u8:0+flush-8:023:24:061
163315993430,3cyclictest284665-21kworker/u8:0+flush-8:000:05:000
163315993424,8cyclictest473315-21latency_hist00:20:010
163315993410,22cyclictest225109-21kworker/0:2+events20:14:130
163317993328,4cyclictest170386-21kworker/u8:1+flush-8:019:21:551
163317993328,3cyclictest163178-21kworker/u8:0+flush-8:019:59:171
163317993326,5cyclictest448401-21grep23:54:201
163317993325,5cyclictest170386-21kworker/u8:1+events_unbound19:29:061
163317993323,8cyclictest280490-21diskstats21:09:031
163315993324,6cyclictest399079-21latency_hist23:05:010
15907423318,8sleep30-21swapper/319:09:023
163321993227,4cyclictest215223-21kworker/u8:3+flush-8:020:09:042
163321993225,5cyclictest483163-21apt-get00:30:002
163317993228,3cyclictest304650-21kworker/u8:2+flush-8:021:34:171
163317993227,4cyclictest424017-21kworker/u8:2+flush-8:023:44:081
163317993227,4cyclictest195414-21kworker/u8:3+events_unbound19:44:131
163317993227,3cyclictest210031-21kworker/u8:1+flush-8:020:29:181
163317993223,6cyclictest304650-21kworker/u8:2+flush-8:021:39:171
163317993222,7cyclictest278-21systemd-journal19:20:001
163315993227,3cyclictest239960-21gpgv20:25:000
163315993223,7cyclictest278-21systemd-journal21:10:000
163315993219,11cyclictest389203-21kworker/u8:2+events_unbound23:10:010
163321993127,3cyclictest284665-21kworker/u8:0+events_unbound00:04:062
163321993126,3cyclictest284665-21kworker/u8:0+flush-8:021:30:312
163321993125,4cyclictest438160-21journal-offline23:44:172
163317993127,2cyclictest339858-21aten2_r5power_e22:09:001
163317993126,4cyclictest284665-21kworker/u8:0+flush-8:022:04:031
163317993126,3cyclictest189279-21needreboot19:34:091
16331599312,27cyclictest309407-21kworker/0:0+events22:34:010
16331599312,27cyclictest225109-21kworker/0:2+events20:59:010
16331599311,25cyclictest309407-21kworker/0:0+events22:45:210
16331599311,25cyclictest2913847-21kworker/0:0+events19:25:130
1631352313,9sleep20-21swapper/219:09:592
163317993024,4cyclictest443560-21cron23:50:001
16331599309,20cyclictest309407-21kworker/0:0+events00:12:330
16331599307,19cyclictest309407-21kworker/0:0+events00:25:210
163315993026,3cyclictest418855-21systemd-run23:25:000
16331599300,26cyclictest225109-21kworker/0:2+events20:50:570
163321992925,2cyclictest354990-21aten2_r5power_p22:24:062
163321992925,2cyclictest354990-21aten2_r5power_p22:24:062
163321992924,3cyclictest275554-21cpuspeed_turbos21:04:032
163321992919,8cyclictest168232-21awk19:15:002
163317992924,3cyclictest405174-21irqcore23:14:071
163317992919,8cyclictest477625-21ntpq00:24:121
163317992919,7cyclictest278-21systemd-journal00:05:001
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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