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2022-05-25 - 21:16

x86 Intel Pentium @133 MHz, Linux 4.18.7-rt5 (Profile)

Latency plot of system in rack #3, slot #5
Data to construct the above plot have been generated using the RT test utility cyclictest.
Command line: cyclictest -l25000000 -m -n -a0 -t1 -p99 -i800 -h1000 -q
Total number of samples: 25 million
Resolution of latency scale: reduced 
Duration: 5 hours, 33 minutes
Compare latency of primary with shadow system
Characteristics of the 10 highest latencies:
System rack3slot5.osadl.org (updated Mon May 23, 2022 12:44:26)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2534099310161,0cyclictest26532-21kworker/u2:111:52:240
2534099306179,0cyclictest10861-21sshd10:46:280
2534099305123,0cyclictest5990-21needreboot12:32:440
2534099293180,0cyclictest18277-21cron09:10:530
2534099293151,0cyclictest1221-21runrttasks07:52:420
2534099292103,0cyclictest19668-21apt-get09:16:530
2534099291135,0cyclictest27292-21chrt11:48:220
2534099290112,0cyclictest2339-21snmpd07:25:590
2534099288153,0cyclictest11934-21latency_hist10:51:080
2534099288129,0cyclictest32745-21chrt12:11:360
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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