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2026-09-11 - 13:12

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 Fri Sep 11, 2026 00:44:14)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
152189322140,6sleep30-21swapper/323:59:103
15158762730,3sleep375-21kworker/3:1-events23:49:233
12653612610,4sleep00-21swapper/019:39:120
13220602570,1chrt1322061-21/usr/sbin/munin20:34:221
1236184995448,5cyclictest3971911-21kworker/u8:2+events_unbound19:14:341
1236183994236,4cyclictest278-21systemd-journal23:09:160
1236184994135,4cyclictest1278517-21apt-get19:54:031
1236184994031,7cyclictest1530890-21latency_hist00:05:021
1236183994035,4cyclictest1226274-21kworker/u8:3+flush-8:019:20:000
123618399400,38cyclictest1-21systemd21:05:000
1236184993933,4cyclictest1338059-21apt-get20:54:041
1236183993932,5cyclictest278-21systemd-journal22:40:010
12313852384,10sleep10-21swapper/119:05:071
1236184993732,4cyclictest1322447-21kworker/u8:0+events_unbound21:14:251
1236184993729,6cyclictest1263644-21/usr/sbin/munin19:39:211
1236183993732,4cyclictest1248226-21kworker/u8:0+flush-8:019:44:080
1236183993631,3cyclictest1555995-21latency_hist00:30:000
1236184993530,4cyclictest1292965-21kworker/u8:1+flush-8:020:14:091
1236184993529,4cyclictest1526186-21kworker/u8:3+flush-8:000:19:251
123618399354,27cyclictest1216269-21kworker/0:2+events21:25:430
1236183993529,4cyclictest1322447-21kworker/u8:0+events_unbound21:39:130
1236183993529,4cyclictest1253087-21gpgv19:25:000
1236183993526,6cyclictest1372128-21latency_hist21:25:000
1236183993526,6cyclictest1372128-21latency_hist21:25:000
1236189993426,6cyclictest278-21systemd-journal22:25:002
1236189993426,6cyclictest278-21systemd-journal22:25:002
1236184993425,6cyclictest278-21systemd-journal23:04:161
1236184993329,2cyclictest1333233-21aten2_r5power_p20:49:051
1236184993328,4cyclictest1292965-21kworker/u8:1+flush-8:020:09:091
1236184993328,3cyclictest1497520-21irqrtprio23:34:101
1236184993328,3cyclictest1497520-21irqrtprio23:34:101
1236184993325,6cyclictest1347380-21cron21:00:011
1236184993228,3cyclictest1346841-21kworker/u8:1+flush-8:021:29:101
1236184993223,7cyclictest1446294-21latency_hist22:40:011
1236184993223,6cyclictest1268600-21/usr/sbin/munin19:44:181
1236184993222,8cyclictest1287157-21ntpq19:59:161
1236183993227,3cyclictest1358592-21irqrtprio21:14:120
1236184993125,4cyclictest1535819-21apt-get00:10:031
1236184993123,6cyclictest1447105-21apt-get22:44:041
1236184993120,9cyclictest1561798-21apt-get00:39:031
1236183993125,4cyclictest1236653-21apt-get19:14:010
1236183993122,3cyclictest1387778-21df21:44:080
13671902300,9sleep1291ktimers/121:20:001
1236189993026,2cyclictest1263888-21cpuspeed_turbos19:39:062
1236184993025,4cyclictest1346841-21kworker/u8:1+events_unbound21:24:181
1236184993025,4cyclictest1346841-21kworker/u8:1+events_unbound21:24:181
1236184993024,4cyclictest1226274-21kworker/u8:3+flush-8:019:19:141
1236184993024,2cyclictest0-21swapper/122:19:111
1236184993023,6cyclictest1481171-21kworker/u8:3+flush-8:023:24:161
1236184993021,6cyclictest278-21systemd-journal20:35:161
1236183993025,3cyclictest1526186-21kworker/u8:3+events_unbound00:35:000
1236184992926,2cyclictest1512347-21irqrtprio23:49:111
1236184992924,3cyclictest1535813-21idleruntime-cro00:10:001
1236184992924,3cyclictest1406622-21unixbench_singl21:59:241
1236184992923,5cyclictest1377090-21kworker/u8:3+events_unbound22:04:151
1236184992923,4cyclictest1263128-21kworker/u8:3+events_unbound20:44:211
1236184992922,5cyclictest1457021-21apt-get22:54:061
1236184992921,6cyclictest1421563-21latency_hist22:15:001
1236184992920,7cyclictest1436958-21apt-get22:34:041
1236183992925,3cyclictest1456382-21unixbench_singl22:49:240
1236183992922,6cyclictest1292965-21kworker/u8:1+flush-8:020:09:210
1236189992825,2cyclictest1516615-21aten2_r5power_c23:54:052
1236189992819,7cyclictest278-21systemd-journal21:29:162
1236184992823,4cyclictest1471279-21kworker/u8:0+flush-8:023:14:191
1236184992821,4cyclictest1263005-21unixbench_singl19:34:221
1236184992816,8cyclictest278-21systemd-journal21:35:001
1236189992723,2cyclictest1328482-21fschecks_count20:44:082
1236189992721,4cyclictest1525901-21sendmail00:00:002
1236189992718,7cyclictest1252981-21apt-get19:24:592
1236184992722,3cyclictest1253173-21apt-key19:25:001
1236184992721,4cyclictest1446123-21kworker/u8:1+events_unbound23:00:001
1236184992721,3cyclictest0-21swapper/121:04:211
1236184992720,5cyclictest1387207-21kworker/u8:2+flush-8:022:09:231
1236184992720,5cyclictest1292738-21latency_hist20:05:011
1236184992715,8cyclictest278-21systemd-journal21:10:001
1236183992723,3cyclictest1426546-21systemd-run22:20:000
1236183992722,4cyclictest1471279-21kworker/u8:0+events_unbound23:39:250
1236183992722,3cyclictest1387207-21kworker/u8:2+flush-8:022:09:100
1236183992718,7cyclictest1312546-21latency_hist20:25:000
12481562260,6sleep20-21swapper/219:20:002
1236189992623,2cyclictest1546844-21fschecks_time00:24:082
1236189992623,2cyclictest1337386-21unixbench_singl20:49:232
1236189992623,2cyclictest1293357-21aten2_r5power_e20:09:062
1236184992620,3cyclictest0-21swapper/123:09:121
1236184992618,5cyclictest0-21swapper/121:45:011
1236184992617,7cyclictest278-21systemd-journal00:35:001
1236184992612,10cyclictest278-21systemd-journal21:55:001
123618399267,18cyclictest1216269-21kworker/0:2+events19:59:520
1236183992623,2cyclictest1492154-21fschecks_count23:29:070
1236183992622,3cyclictest1530872-21cron00:05:000
123618399262,19cyclictest1471299-21kworker/0:1+events23:55:030
1236183992619,5cyclictest1471262-21latency_hist23:05:010
123618399261,24cyclictest1471299-21kworker/0:1+events23:24:120
1236189992522,2cyclictest1466212-21unixbench_singl22:59:282
1236189992522,2cyclictest1307641-21sendmail20:20:012
1236189992522,2cyclictest1307641-21sendmail20:20:002
1236189992520,4cyclictest1545965-21idleruntime-cro00:20:002
123618499252,16cyclictest1547255-21sed00:24:111
1236184992520,4cyclictest1263128-21kworker/u8:3+events_unbound20:29:091
1236184992519,4cyclictest1426464-21kworker/u8:0+flush-8:022:24:121
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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