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2022-10-03 - 04:11

ARM TI AM3354 @800 MHz, Linux 5.10.47-rt46 (Profile)

Latency plot of system in rack #4, slot #2
Data to construct the above plot have been generated using the RT test utility cyclictest.
Command line: cyclictest -l50000000 -m -n -a0 -t1 -p99 -i400 -h400 -q
Total number of samples: 50 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 20 highest latencies:
System rack4slot2.osadl.org (updated Mon Oct 03, 2022 00:44:03)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
73502750,0irq/45-4a100000299232sleep018:54:230
30054998954,0cyclictest0-21swapper23:22:380
7350870,0irq/45-4a10000014548-1kworker/u3:422:57:400
7350850,0irq/45-4a1000001611-21apt-get20:42:060
30054998354,0cyclictest0-21swapper22:51:100
30054998347,0cyclictest0-21swapper22:49:590
7350820,0irq/45-4a10000022049-1kworker/u3:222:02:050
30054998251,0cyclictest0-21swapper22:12:280
7450810,0irq/46-4a1000005902-21runrttasks20:51:420
7450810,0irq/46-4a10000031007-21df_abs22:05:200
7450810,0irq/46-4a10000022133-21sshd23:14:520
7450810,0irq/46-4a10000017061-21/usr/sbin/munin23:00:140
7450810,0irq/46-4a1000001480-21snmpd19:30:370
7350810,0irq/45-4a10000030456-1kworker/u3:123:50:370
7350810,0irq/45-4a10000029777-21sshd23:35:520
7350810,0irq/45-4a10000013398-21kworker/u2:019:40:000
323562810,0chrt28962-1kworker/u3:020:34:490
30054998149,0cyclictest0-21swapper23:46:420
2738428112,0sleep027401-21basename20:20:120
7450800,0irq/46-4a10000025623-21wc20:14:550
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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