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2026-03-26 - 09:46

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, slot #6

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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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 50 highest latencies:
System rackeslot6s.osadl.org (updated Thu Mar 26, 2026 00:44:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
996052997339,27cyclictest1026974-21latency_hist22:10:011
996052997339,27cyclictest1026974-21latency_hist22:10:011
996052997030,34cyclictest0-21swapper/122:00:291
99605299696,28cyclictest0-21swapper/100:20:011
996052996723,32cyclictest1051576-21grep00:30:291
996054996623,17cyclictest311ktimers/223:20:002
996052996140,17cyclictest1035405-21latency_hist23:00:001
996052996119,37cyclictest0-21swapper/122:15:281
996052996119,33cyclictest0-21swapper/120:00:291
996052996119,33cyclictest0-21swapper/120:00:281
99605199607,19cyclictest0-21swapper/023:40:010
996052995922,31cyclictest0-21swapper/120:25:281
99605299584,42cyclictest1011667-21rm20:40:011
996052995821,4cyclictest0-21swapper/121:45:251
996052995719,4cyclictest0-21swapper/120:30:291
996052995717,7cyclictest0-21swapper/120:10:281
996052995624,29cyclictest1042379-21/usr/sbin/munin23:40:221
996052995532,17cyclictest1052437-21grep00:35:271
996052995522,27cyclictest0-21swapper/123:45:281
99605199551,52cyclictest0-21swapper/019:35:150
996052995418,5cyclictest0-21swapper/120:50:011
996052995418,4cyclictest0-21swapper/119:20:231
99605299536,12cyclictest0-21swapper/120:09:591
996052995322,26cyclictest0-21swapper/100:00:251
996052995322,26cyclictest0-21swapper/100:00:251
996052995319,30cyclictest0-21swapper/121:10:161
996052995317,7cyclictest0-21swapper/119:55:291
996051995345,5cyclictest1020961-21munin-plugin-st21:35:000
996051995345,5cyclictest1020961-21munin-plugin-st21:35:000
99605199531,8cyclictest0-21swapper/020:20:010
99605499527,40cyclictest30-21rcuc/220:05:022
996054995240,6cyclictest1041322-21munin-plugin-st23:35:002
996052995223,23cyclictest0-21swapper/100:00:001
996052995216,8cyclictest0-21swapper/120:15:251
996051995243,5cyclictest167350irq/118-8000000.ethernet-tx023:45:010
996052995144,4cyclictest1018423-21sendmail21:20:001
996051995146,3cyclictest0-21swapper/023:05:110
996051995137,10cyclictest1283-21cron19:15:010
996054995033,11cyclictest0-21swapper/221:55:002
996054994940,6cyclictest1040482-21munin-plugin-st23:30:002
996054994940,6cyclictest1040482-21munin-plugin-st23:30:002
996054994931,10cyclictest0-21swapper/200:00:202
996054994931,10cyclictest0-21swapper/200:00:202
996052994923,5cyclictest1014399-21/usr/sbin/munin20:55:251
996052994923,22cyclictest1021157-21/usr/sbin/munin21:35:201
996052994917,7cyclictest0-21swapper/121:40:191
996051994938,7cyclictest1036160-21grep23:00:280
996054994839,4cyclictest1022662-21munin-plugin-st21:45:002
996052994825,19cyclictest167450irq/126-8000000.ethernet-tx123:10:231
996051994840,6cyclictest1283-21cron00:10:000
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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