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2025-11-12 - 16:16

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
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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 50 highest latencies:
System rack5slot4s.osadl.org (updated Wed Nov 12, 2025 12:44:15)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
15965712800,3chrt0-21swapper/110:05:011
1420322996347,11cyclictest1521175-21kworker/u8:2+flush-8:010:21:211
16141552600,2sleep01420314-21cyclictest10:21:280
16122602600,2sleep3481ktimers/310:21:243
16017272590,2chrt586-21kworker/3:2+mm_percpu_wq10:10:003
1420322995848,7cyclictest1420174-21latency_hist07:10:011
1420325995749,5cyclictest1596598-21gpgv10:05:012
1420319995748,7cyclictest1625585-21ntpq10:31:300
1420322995446,6cyclictest1710784-21latency_hist12:00:011
1420319995346,5cyclictest1521175-21kworker/u8:2+events_unbound09:16:380
1420319995344,7cyclictest1641319-21kworker/u8:2+events_unbound12:11:340
1420322995244,6cyclictest1471374-21ntpq07:56:331
1420322995144,5cyclictest1647068-21journal-offline10:56:221
1420322995143,5cyclictest1425201-21latency_hist07:15:011
1420322995041,6cyclictest1516167-21ntpq08:41:301
1420319994839,6cyclictest1521950-21latency_hist08:50:010
1420322994740,5cyclictest1651992-21journal-offline11:01:231
1420322994740,5cyclictest1596960-21kworker/u8:3+events_unbound10:36:321
1420322994740,5cyclictest1373426-21kworker/u8:2+flush-8:007:15:061
1420319994739,6cyclictest1536025-21ntpq09:01:300
1420319994738,6cyclictest1597323-21diskstats10:06:210
1420319994735,9cyclictest282-21systemd-journal08:55:000
1420322994640,4cyclictest1451655-21kworker/u8:0+flush-8:008:36:211
1420322994639,5cyclictest1675931-21kworker/u8:0+flush-8:012:11:321
1420322994639,5cyclictest1621754-21kworker/u8:1+flush-8:011:51:301
1420322994638,6cyclictest1425224-21kworker/u8:3+flush-8:007:51:301
1420322994636,7cyclictest282-21systemd-journal10:51:441
1420319994637,7cyclictest1680289-21ntpq11:26:280
1420319994435,6cyclictest282-21systemd-journal11:40:000
1420319994434,8cyclictest1555848-21ntpq09:21:310
1420319994434,8cyclictest1555848-21ntpq09:21:310
1420322994338,4cyclictest1425224-21kworker/u8:3+flush-8:008:06:361
1420322994334,7cyclictest1532123-21kworker/u8:3+flush-8:009:21:331
1420322994334,7cyclictest1532123-21kworker/u8:3+flush-8:009:21:331
1420322994233,7cyclictest1456350-21ntpq07:41:291
1420322994231,9cyclictest1571639-21cp09:40:011
1420319994232,7cyclictest282-21systemd-journal11:15:000
1420322994136,4cyclictest1621754-21kworker/u8:1+flush-8:012:26:391
1420322994034,4cyclictest1690162-21journal-offline11:36:281
1420322993931,5cyclictest1671602-21apt-get11:21:171
1420319993933,4cyclictest1731223-21wget12:21:190
1420325993827,9cyclictest282-21systemd-journal10:43:442
1420325993827,9cyclictest282-21systemd-journal10:43:442
1420322993833,3cyclictest1641319-21kworker/u8:2+events_unbound11:20:011
1420322993831,5cyclictest1666067-21apt-get11:15:001
1420322993828,8cyclictest1621754-21kworker/u8:1+flush-8:012:31:301
142031999384,17cyclictest0-21swapper/009:40:040
1420319993831,4cyclictest1517013-21latency_hist08:45:010
1420322993733,3cyclictest1675931-21kworker/u8:0+events_unbound12:06:331
1420319993712,14cyclictest1660303-21ntpq11:06:330
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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