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2022-12-05 - 05:02

x86 Intel Atom E3950 @1600 MHz, Linux 5.6.19-rt12 (Profile)

Latency plot of system in rack #9, slot #2
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 -Sp99 -i200 -h400 -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 100 highest latencies:
System rack9slot2 (updated Mon Dec 05, 2022 00:43:25)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
187412320252,55sleep30-21swapper/33
187302303267,24sleep20-21swapper/22
187122288215,59sleep10-21swapper/11
181602272186,17sleep00-21swapper/00
1895221560,1sleep10-21swapper/11
321412460,2sleep1201rcuc/11
20602460,2sleep31913199cyclictest3
73022410,1sleep10-21swapper/11
159732410,3sleep01911999cyclictest0
19119993615,19cyclictest24015-21expr0
19119993514,19cyclictest9650-21sed0
19119993414,2cyclictest9756-21/usr/sbin/munin0
19119993413,3cyclictest26039-21cat0
19119993412,4cyclictest29662-21cut0
19119993411,4cyclictest7001-21cat0
19119993410,5cyclictest505-21dbus-daemon0
1911999339,21cyclictest0-21swapper/00
19119993312,3cyclictest20249-21cat0
19119993311,3cyclictest16866-21cat0
19119993310,20cyclictest0-21swapper/00
19119993214,3cyclictest31766-21/usr/sbin/munin0
19119993210,3cyclictest8887-21latency_hist0
1911999319,3cyclictest8533-21cut0
19119993112,2cyclictest322-21systemd-journal0
1911999311,12cyclictest23577-21cron0
1911999311,11cyclictest29082-21grep0
19119993110,3cyclictest7475-21cpuspeed_turbos0
1911999309,4cyclictest505-21dbus-daemon0
1911999309,3cyclictest28027-21latency_hist0
1911999308,3cyclictest561-21wc0
1911999308,3cyclictest561-21wc0
1911999306,3cyclictest0-21swapper/00
19119993012,3cyclictest665-21runrttasks0
19119993011,3cyclictest665-21runrttasks0
19119993010,3cyclictest30784-21cut0
19119993010,2cyclictest19401-21gltestperf0
1911999300,11cyclictest21066-21sed0
1911999300,11cyclictest21066-21sed0
19127992912,14cyclictest5020-21sed2
1911999299,3cyclictest5373-21ntpq0
1911999291,3cyclictest3075-21/usr/sbin/munin0
185802290,5sleep31913199cyclictest3
1911999288,3cyclictest26766-21cat0
1911999285,4cyclictest0-21swapper/00
19119992811,3cyclictest665-21runrttasks0
19119992810,3cyclictest665-21runrttasks0
1912399271,23cyclictest2839-21sh1
1912799269,4cyclictest0-21swapper/22
1912799259,4cyclictest8795-21processes2
196452240,2sleep30-21swapper/33
1913199240,4cyclictest12926-21munin-run3
1911999248,4cyclictest322-21systemd-journal0
1912799233,18cyclictest29554-21cat2
1912799231,4cyclictest14166-21munin-run2
200592220,3sleep11912399cyclictest1
19131992217,3cyclictest35-21ksoftirqd/33
19131992216,3cyclictest4835-40mandb3
19131992215,4cyclictest322-21systemd-journal3
1913199220,19cyclictest14552-21nfs4_client3
1912799223,17cyclictest25515-21cat2
1912799223,17cyclictest12912-21cat2
19127992216,3cyclictest13876-21ntp_offset2
1912799221,19cyclictest851-21munin-run2
1912799221,18cyclictest23397-21munin-run2
19123992216,4cyclictest9756-21/usr/sbin/munin1
19119992212,1cyclictest0-21swapper/00
1911999221,18cyclictest14334-21grep0
147662220,2sleep20-21swapper/22
29652210,2sleep00-21swapper/00
19131992116,3cyclictest35-21ksoftirqd/33
19131992115,4cyclictest17626-21date3
19131992115,4cyclictest17626-21date3
1912799213,16cyclictest0-21swapper/22
1912799212,17cyclictest449-21cat2
1912799212,16cyclictest322-21systemd-journal2
1912799212,16cyclictest322-21systemd-journal2
19127992116,3cyclictest6065-21uname2
19127992116,3cyclictest18700-21cron2
19127992116,3cyclictest14205-21switchtime2
19127992115,4cyclictest559-21gdbus2
19127992115,4cyclictest1069-21idleruntime-cro2
1912799211,3cyclictest13481-21perf2
1912799211,17cyclictest23621-1kworker/2:0H2
1912799210,19cyclictest27585-21sendmail-mta2
1912799210,19cyclictest0-21swapper/22
1912799210,18cyclictest8805-21munin-run2
19123992115,4cyclictest1068-21tail1
19123992115,4cyclictest1068-21tail1
19123992114,4cyclictest17515-21ls1
1912399210,19cyclictest13843-21nfs4_client1
19119992115,4cyclictest2282-21cron0
19119992115,4cyclictest2282-21cron0
1913199206,4cyclictest35-21ksoftirqd/33
19131992017,2cyclictest35-21ksoftirqd/33
19131992015,3cyclictest5316-21ls3
19131992015,3cyclictest20434-21wc3
19131992015,3cyclictest18854-21timerwakeupswit3
19131992015,3cyclictest14180-21dump-pmu-power3
19131992015,3cyclictest14066-21expr3
19131992014,4cyclictest21192-21cut3
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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