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2022-05-23 - 04:33

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 Fri May 20, 2022 00:43:58)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
74501860,0irq/46-4a10000029851-21runrttasks18:59:190
90872950,0sleep07170-1kworker/u3:019:34:580
7450950,0irq/46-4a1000004085-21/usr/sbin/munin19:21:580
7450940,0irq/46-4a10000032558-21apt20:45:270
7450940,0irq/46-4a10000018111-21open_inodes23:11:130
225282940,0sleep021617-1kworker/u3:120:12:360
7450930,0irq/46-4a1000003383-21cron20:55:180
7450930,0irq/46-4a10000030857-21seq20:40:320
7450920,0irq/46-4a1000008447-1kworker/u3:100:22:450
7450920,0irq/46-4a1000004280-21seq20:56:130
7450920,0irq/46-4a1000003045-21memory19:16:070
7450920,0irq/46-4a10000029239-21timerandwakeup20:32:260
7450920,0irq/46-4a10000021340-21grep23:21:000
7450920,0irq/46-4a10000012914-21meminfo22:56:470
7450920,0irq/46-4a1000001262-21processes23:57:150
7450920,0irq/46-4a10000010705-21df_inode21:15:420
195662920,0sleep017350-1kworker/u3:121:41:030
192482920,0sleep018867-1kworker/u3:020:04:010
138152929,0sleep013819-21apt-get21:25:290
7450910,0irq/46-4a1000009012-21diskstats21:10:470
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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