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2025-12-13 - 16:45

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #7, 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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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.
Unexpectedly long latencies may be caused by SMIs
Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 50 highest latencies:
System rack7slot4s.osadl.org (updated Fri Dec 12, 2025 00:45:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
746499736,20cyclictest21-21ksoftirqd/122:45:131
747399514,42cyclictest0-21swapper/221:10:142
747399502,15cyclictest0-21swapper/221:40:122
745399505,41cyclictest1801-21ssh21:35:100
746499491,14cyclictest21-21ksoftirqd/100:35:171
747399482,41cyclictest24613-21ssh22:30:162
747399482,13cyclictest9496-21ssh22:00:132
745399484,7cyclictest131rcu_preempt22:45:120
7453994810,24cyclictest131rcu_preempt19:25:120
745399472,35cyclictest26358-21ssh21:10:130
7453994522,15cyclictest629-21Async14:00:480
745399442,6cyclictest131rcu_preempt00:15:160
746499431,12cyclictest21-21ksoftirqd/122:25:141
745399422,30cyclictest0-21swapper/020:20:150
745399421,28cyclictest14073-21ssh00:25:180
746499411,30cyclictest8003-21ssh22:40:131
745399412,29cyclictest21895-21ssh00:30:150
745399411,24cyclictest15457-21ssh00:05:150
747399392,6cyclictest0-21swapper/221:47:542
747399392,29cyclictest16029-21ssh23:05:142
747399383,9cyclictest23654-21kthreadcore00:30:242
747399383,28cyclictest25357-21ssh22:10:142
745399385,19cyclictest12-21ksoftirqd/022:05:160
747399379,12cyclictest131rcu_preempt22:05:172
747399372,10cyclictest32534-21kthreadcore23:55:232
747399371,9cyclictest4456-21if_eth119:40:182
747399361,8cyclictest27883-21netstat22:50:282
7473993614,5cyclictest932-21snmpd19:50:162
747399360,11cyclictest17982-21latency_hist21:25:022
746499361,29cyclictest9929-21sh21:40:161
747399351,8cyclictest10965-21sendmail_mailtr23:40:272
747399351,15cyclictest11085-21cut23:00:272
7473993425,6cyclictest26346irq/40-dwc2_hso23:15:132
7473993422,5cyclictest27-21ksoftirqd/219:45:122
7473993319,6cyclictest0-21swapper/221:30:142
747399331,10cyclictest16197-21apt-get22:45:122
746499332,28cyclictest0-21swapper/122:35:121
746499331,29cyclictest25933-21ssh21:50:171
745399334,17cyclictest7160-21ssh23:40:120
745399333,21cyclictest15174-21diskmemload23:45:130
7481993218,12cyclictest0-21swapper/322:30:173
747399328,7cyclictest27-21ksoftirqd/200:35:162
746499327,6cyclictest21-21ksoftirqd/121:10:131
746499323,25cyclictest1535-21ssh21:55:191
746499322,18cyclictest22305-21kworker/u8:123:45:131
745399323,7cyclictest131rcu_preempt19:55:120
748199313,17cyclictest29566irq/58-eth021:40:153
7481993119,7cyclictest29566irq/58-eth021:55:163
747399315,16cyclictest0-21swapper/219:30:142
747399313,17cyclictest26346irq/40-dwc2_hso19:35:122
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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