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2022-12-02 - 08:37

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 
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ARM Broadcom BCM2711 @1500 MHz, Linux 5.10.52-rt47-v7l (Profile)

Latency plot of shadow in rack #7, slot #4
Data to construct the above plot have been generated using the RT test utility cyclictest.
Unexpectedly long latencies may be caused by SMIs
Command line: cyclictest -l100000000 -m -n -a0-2 -p99 -i200 -h400 -t3 -q
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 376 highest latencies:
System rack7slot4s.osadl.org (updated Fri Dec 02, 2022 00:43:27)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3426997418,31cyclictest12-21ksoftirqd/00
342699688,7cyclictest131rcu_preempt0
341099682,7cyclictest0-21swapper/00
341099662,50cyclictest26463-21ssh0
342699653,29cyclictest0-21swapper/00
3426996510,24cyclictest12-21ksoftirqd/00
342699647,6cyclictest131rcu_preempt0
342699612,5cyclictest131rcu_preempt0
342699562,31cyclictest31236-21ssh0
3426995514,16cyclictest12-21ksoftirqd/00
342699538,22cyclictest12-21ksoftirqd/00
342699532,26cyclictest12-21ksoftirqd/00
341099532,9cyclictest0-21swapper/00
341099524,36cyclictest12-21ksoftirqd/00
341099521,5cyclictest32467-21ssh0
341099520,6cyclictest2436-21ssh0
340399474,23cyclictest22731-21ssh0
342699463,28cyclictest13503-21ssh0
3426994621,6cyclictest0-21swapper/00
340399469,23cyclictest12-21ksoftirqd/00
340399464,30cyclictest23191-21ssh0
342699451,29cyclictest6212-21diskmemload0
341099452,6cyclictest0-21swapper/00
342699447,7cyclictest131rcu_preempt0
3426994412,12cyclictest19383-1kworker/0:1H0
342699432,21cyclictest12-21ksoftirqd/00
3426994214,7cyclictest131rcu_preempt0
3426994213,13cyclictest634-21Async0
3403994234,5cyclictest18672-21grep0
342699365,21cyclictest0-21swapper/00
341099358,5cyclictest23737-21apt-config0
341099358,4cyclictest9098-21grep0
341099351,9cyclictest21214-21kthreadcore0
341099348,4cyclictest339-21/usr/sbin/munin0
341099341,9cyclictest30284-21/usr/sbin/munin0
341099340,8cyclictest30653-21latency0
341099333,10cyclictest29137-21apt-get0
341099331,8cyclictest2967-21kthreadcore0
341099331,8cyclictest28662-21kthreadcore0
341099330,10cyclictest13822-21unixbench_singl0
341099330,10cyclictest11149-21fschecks_time0
3403993327,4cyclictest1346-21fschecks_time0
341099322,6cyclictest19063-21latency_hist0
341099322,5cyclictest0-21swapper/00
341099321,9cyclictest5012-21kernelversion0
341099321,9cyclictest4663-21latency0
341099321,8cyclictest14089-21kthreadcore0
341099321,7cyclictest1790-21grep0
341099320,9cyclictest4266-21sed0
341099320,9cyclictest30521-21sort0
3403993227,3cyclictest23045-21grep0
3426993114,10cyclictest3392-21cyclictest0
342699311,21cyclictest20657-21ssh0
341099317,21cyclictest13170-21missed_timers0
341099311,9cyclictest18684-21sed0
341099311,8cyclictest9320-21cat0
341099311,8cyclictest27895-21latency_hist0
341099311,8cyclictest23655-21ps0
341099311,7cyclictest678-21tr0
341099310,8cyclictest18653-21ntpq0
341099310,8cyclictest13089-21latency_hist0
341099301,9cyclictest30484-21kthreadcore0
341099300,7cyclictest18514-21cat0
341099291,8cyclictest7140-21fschecks_time0
341099291,7cyclictest28033-21/usr/sbin/munin0
341099282,8cyclictest0-21swapper/00
340399181,13cyclictest3402-21apt-config0
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*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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