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2026-08-15 - 03:35

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 Aug 15, 2026 00:44:13)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
162031123220,3sleep3575-21kworker/3:2+events20:47:593
158762521360,4sleep3481ktimers/320:17:493
16392042710,3sleep1161rcu_preempt21:07:511
15426772600,3chrt281rcuc/119:32:491
15159102580,5chrt0-21swapper/019:07:480
1519357995751,4cyclictest1810356-21cp00:00:002
16737162540,4chrt371rcuc/221:42:512
1519355995446,6cyclictest1626141-21/usr/sbin/munin20:57:591
1519355995042,6cyclictest1524284-21latency_hist19:15:011
1519351994940,6cyclictest1665583-21latency_hist21:35:010
1519351994840,6cyclictest275-21systemd-journal22:45:000
1519351994838,7cyclictest1700909-21latency_hist22:10:010
1519351994737,7cyclictest1550506-21ntpq19:37:520
1519351994641,4cyclictest1691277-21kworker/u8:1+flush-8:022:02:460
1519355994540,4cyclictest1715960-21kworker/u8:0+flush-8:022:27:561
1519355994538,5cyclictest1691277-21kworker/u8:1+flush-8:022:07:581
1519351994539,3cyclictest1-21systemd20:40:000
1519351994537,6cyclictest1710784-21latency_hist22:20:010
1519355994438,5cyclictest187032-21kworker/u8:0+flush-8:020:52:581
1519351994436,5cyclictest1580969-21latency_hist20:10:010
1519351994339,3cyclictest1556056-21kworker/u8:2+flush-8:019:47:570
1519351994337,4cyclictest1690791-21apt-get22:00:010
1519355994236,4cyclictest1615695-21gpgv20:45:001
1519351994234,6cyclictest275-21systemd-journal22:53:080
17016112410,2chrt1519345-21cyclictest22:12:431
15867612410,1sleep01586763-21basename20:17:460
1519357994130,9cyclictest1725865-21awk22:35:002
1519351994134,5cyclictest1776111-21apt-get23:27:410
1519351994134,5cyclictest1641036-21apt-get21:12:400
1519355994034,5cyclictest1715960-21kworker/u8:0+flush-8:022:47:581
1519355994030,7cyclictest1730843-21latency_hist22:40:011
1519351994035,4cyclictest187032-21kworker/u8:0+flush-8:020:52:440
1519351993934,3cyclictest1625730-21kworker/u8:3+flush-8:021:02:570
1519351993934,3cyclictest1625730-21kworker/u8:3+flush-8:021:02:570
1519351993933,4cyclictest1810430-21kworker/u8:3+flush-8:000:05:000
1519351993930,6cyclictest1715941-21latency_hist22:25:010
1519351993929,7cyclictest1540351-21ntpq19:27:530
1519355993833,4cyclictest1519231-21kworker/u8:3+flush-8:019:42:441
1519355993829,7cyclictest1756306-21apt-get23:07:411
1519355993829,6cyclictest275-21systemd-journal22:58:081
1519355993828,7cyclictest275-21systemd-journal20:40:001
1519351993833,4cyclictest1751125-21kworker/u8:1+flush-8:023:12:580
1519351993833,3cyclictest1810430-21kworker/u8:3+flush-8:000:12:450
1519351993832,5cyclictest187032-21kworker/u8:0+events_unbound20:00:010
1519351993832,4cyclictest1805830-21apt-get23:57:400
1519351993832,4cyclictest1635848-21kworker/u8:2+events_unbound23:35:010
151935199381,33cyclictest1740775-21munin-run22:50:000
15146642384,9sleep10-21swapper/119:06:261
1519357993730,5cyclictest1745813-21journal-offline22:53:482
1519355993730,5cyclictest275-21systemd-journal22:34:081
1519351993730,5cyclictest1751125-21kworker/u8:1+flush-8:023:47:580
1519355993631,4cyclictest1815650-21kworker/u8:4+flush-8:000:22:591
1519355993627,6cyclictest1531174-21latency_hist19:20:011
1519351993631,4cyclictest1751125-21kworker/u8:1+flush-8:023:08:040
1519351993631,3cyclictest1524544-21irqcore19:15:010
1519351993630,4cyclictest1541769-21apt-get19:32:410
1519355993528,5cyclictest1841610-21irqrtprio00:32:481
1519351993530,3cyclictest1800437-21kworker/u8:0+flush-8:000:20:010
1519357993430,3cyclictest1487150-21kworker/u8:1+flush-8:019:17:542
1519351993425,7cyclictest275-21systemd-journal21:30:000
1519355993328,3cyclictest275-21systemd-journal23:58:091
1519355993328,3cyclictest1519231-21kworker/u8:3+events_unbound20:02:461
1519351993328,4cyclictest1800437-21kworker/u8:0+events_unbound00:22:580
1519351993327,5cyclictest1715960-21kworker/u8:0+flush-8:022:32:590
1519351993327,4cyclictest1635848-21kworker/u8:2+flush-8:021:52:500
1519351993326,5cyclictest1585899-21latency_hist20:15:010
1519357993225,5cyclictest1710783-21apt22:20:002
1519357993225,5cyclictest1556056-21kworker/u8:2+flush-8:019:52:542
1519355993228,3cyclictest1745767-21kworker/u8:3+flush-8:023:02:561
1519355993227,3cyclictest1776831-21irqrtprio23:27:481
1519355993226,4cyclictest1815650-21kworker/u8:4+events_unbound00:17:551
1519355993226,4cyclictest1631727-21irqcore21:02:471
1519355993226,4cyclictest1631727-21irqcore21:02:471
1519355993226,4cyclictest1565821-21grep19:52:581
1519355993225,5cyclictest1825077-21grep00:13:001
1519355993222,8cyclictest1735041-21ntpq22:42:551
1519351993227,3cyclictest1556056-21kworker/u8:2+events_unbound19:52:400
1519357993125,4cyclictest1815650-21kworker/u8:4+events_unbound00:22:482
1519355993126,4cyclictest1770929-21kworker/u8:3+flush-8:023:32:481
1519355993125,5cyclictest1681123-21kworker/u8:3+events_unbound21:52:431
1519355993125,4cyclictest1751125-21kworker/u8:1+flush-8:023:12:541
1519355993122,7cyclictest275-21systemd-journal19:23:051
1519355993121,8cyclictest1580268-21ntpq20:07:561
1519351993127,3cyclictest1519231-21kworker/u8:3+events_unbound19:22:560
1519351993125,4cyclictest1815650-21kworker/u8:4+events_unbound00:32:440
1519351993124,6cyclictest1635848-21kworker/u8:2+flush-8:023:37:520
1519351993124,5cyclictest1645367-21kworker/u8:3+events_unbound21:17:530
1519357993026,3cyclictest1590828-21cron20:20:002
1519357993025,3cyclictest1825074-21unixbench_multi00:13:002
1519355993026,3cyclictest1660924-21kworker/u8:1+flush-8:021:47:441
1519355993024,4cyclictest1569661-21kthreadcore19:57:501
1519355993022,6cyclictest1556739-21aten2_r5power_v19:47:421
1519351993026,2cyclictest1600776-21systemd-run20:30:000
1519351993024,5cyclictest1715960-21kworker/u8:0+events_unbound22:37:530
1519351993023,5cyclictest1850468-21gpgv00:40:010
1519357992925,2cyclictest1770717-21systemd-run23:20:012
1519357992923,4cyclictest1715960-21kworker/u8:0+events_unbound22:42:432
1519357992922,5cyclictest1785551-21cron23:35:002
1519355992925,3cyclictest1800437-21kworker/u8:0+events_unbound00:38:411
1519355992924,4cyclictest1635848-21kworker/u8:2+flush-8:023:49:221
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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