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2023-06-11 - 03:39

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 50 highest latencies:
System rack9slot2 (updated Sun Jun 11, 2023 00:43:25)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
147662258185,25sleep30-21swapper/33
149412256220,24sleep20-21swapper/22
148202253180,25sleep10-21swapper/11
132872248183,51sleep00-21swapper/00
2279121070,4sleep31517999cyclictest3
71572500,2sleep00-21swapper/00
173562480,2sleep31517999cyclictest3
306972450,1sleep00-21swapper/00
165792410,1sleep00-21swapper/00
39952290,5sleep1201rcuc/11
1517999293,6cyclictest341rcuc/33
1517999262,7cyclictest35-21ksoftirqd/33
1517299269,14cyclictest30200-21forks2
15172992613,10cyclictest9278-21aten2_r9power_p2
15179992522,2cyclictest341rcuc/33
15179992518,4cyclictest14903-21sh3
1517999251,6cyclictest26810-21awk3
15172992513,10cyclictest7656-21entropy2
1517299251,20cyclictest22837-21munin-run2
1517999240,6cyclictest35-21ksoftirqd/33
1517299246,15cyclictest0-21swapper/22
15172992412,11cyclictest28-21ksoftirqd/22
1517999235,6cyclictest35-21ksoftirqd/33
15179992320,2cyclictest341rcuc/33
1517299234,17cyclictest25375-21cat2
1517999224,5cyclictest35-21ksoftirqd/33
15179992214,5cyclictest29264-21sh3
1517299225,14cyclictest0-21swapper/22
1517299224,17cyclictest28-21ksoftirqd/22
1517299224,16cyclictest24835-21awk2
1517299223,17cyclictest6427-21cat2
1517299223,17cyclictest5018-21munin-run2
1517299221,3cyclictest1045-21munin-run2
15172992211,9cyclictest13222-21aten2_r9power_e2
15166992217,3cyclictest514-21avahi-daemon1
1516699221,6cyclictest0-21swapper/11
15166992216,4cyclictest23448-21expr1
1517999218,3cyclictest111rcu_preempt3
15179992118,2cyclictest341rcuc/33
15179992118,2cyclictest341rcuc/33
15179992118,2cyclictest341rcuc/33
15179992115,4cyclictest26871-21awk3
15179992115,4cyclictest26766-21proc_pri3
15179992114,4cyclictest4494-21seq3
15179992114,4cyclictest322-21systemd-journal3
15179992110,3cyclictest111rcu_preempt3
1517999210,6cyclictest35-21ksoftirqd/33
1517999210,11cyclictest6542-21runrttasks3
1517299213,2cyclictest28-21ksoftirqd/22
1517299212,17cyclictest23643-21cat2
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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