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2025-08-21 - 21:30

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, slot #3

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 rackeslot3s.osadl.org (updated Thu Aug 21, 2025 12:45:08)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
685100997148,5cyclictest131rcu_preempt09:55:031
685095996861,3cyclictest12-21ksoftirqd/010:25:020
68509599682,43cyclictest131rcu_preempt11:35:020
68509599651,39cyclictest131rcu_preempt07:45:020
685095996459,3cyclictest0-21swapper/008:25:030
685095996459,3cyclictest0-21swapper/008:25:020
68509599637,11cyclictest12-21ksoftirqd/009:20:020
68509599637,11cyclictest12-21ksoftirqd/009:20:010
68510099625,9cyclictest23-21ksoftirqd/112:40:021
68510099625,9cyclictest23-21ksoftirqd/112:40:011
685095996157,2cyclictest0-21swapper/007:30:020
685100996012,6cyclictest131rcu_preempt12:20:001
68510099594,12cyclictest23-21ksoftirqd/111:00:001
685100995916,12cyclictest23-21ksoftirqd/110:45:021
685100995914,5cyclictest131rcu_preempt09:20:011
685100995914,5cyclictest131rcu_preempt09:20:001
68510099586,5cyclictest131rcu_preempt10:25:011
685100995821,10cyclictest23-21ksoftirqd/110:30:011
685100995812,6cyclictest131rcu_preempt09:40:011
68509599581,36cyclictest131rcu_preempt12:30:020
68510099579,11cyclictest23-21ksoftirqd/110:35:021
68510099579,11cyclictest23-21ksoftirqd/110:35:021
68510099575,7cyclictest131rcu_preempt10:20:021
68510499566,37cyclictest696515-21kworker/u8:311:10:012
685100995637,15cyclictest235-21systemd-journal09:00:001
685100995612,16cyclictest131rcu_preempt07:35:031
68509599562,36cyclictest16950irq/224-800000007:20:020
685100995513,4cyclictest131rcu_preempt07:55:001
685100995510,6cyclictest131rcu_preempt10:40:011
685095995530,7cyclictest235-21systemd-journal11:00:380
68509599544,7cyclictest12-21ksoftirqd/009:30:020
685109995335,14cyclictest1-21systemd10:35:013
685109995335,14cyclictest1-21systemd10:35:003
685104995335,14cyclictest1-21systemd08:55:002
68510099537,6cyclictest131rcu_preempt07:40:021
68510099535,10cyclictest23-21ksoftirqd/111:40:021
685100995311,6cyclictest131rcu_preempt07:41:211
685095995335,14cyclictest235-21systemd-journal08:35:000
68509599533,12cyclictest0-21swapper/008:00:000
685109995234,14cyclictest272-21dbus-daemon11:19:593
68510099529,7cyclictest131rcu_preempt10:15:011
68510099523,11cyclictest23-21ksoftirqd/108:50:011
685100995216,11cyclictest23-21ksoftirqd/109:49:591
685095995211,6cyclictest131rcu_preempt10:20:010
685104995132,14cyclictest235-21systemd-journal08:05:002
685100995135,11cyclictest235-21systemd-journal07:30:001
685100995116,7cyclictest23-21ksoftirqd/112:05:011
685100995111,6cyclictest131rcu_preempt12:35:011
685095995132,14cyclictest235-21systemd-journal10:10:000
685095995121,11cyclictest12-21ksoftirqd/011:45:020
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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