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2021-05-12 - 13:19

Pentium 75 - 200, 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 20 highest latencies:
System rack3slot5.osadl.org (updated Tue May 11, 2021 12:44:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
674503100,0irq/11-sym53c8x1142-21jbd2/sda1-807:04:380
244749927082,0cyclictest20899-21munin-run09:19:400
2447499268112,0cyclictest1610-21munin-node12:19:500
244749926552,0cyclictest19600-21munin-run09:14:400
2447499260120,0cyclictest7319-21munin-run08:19:350
244749925890,0cyclictest24170-21touch11:39:400
244749925777,0cyclictest6247-21ssh12:36:300
2447499255108,0cyclictest14165-21mailstats08:49:460
244749925379,0cyclictest928-21ssh10:09:380
244749925279,0cyclictest16784-21switchtime09:00:330
244749925085,0cyclictest29646-21ssh12:01:060
2447499250132,0cyclictest7557-21apt08:20:040
2447499249106,0cyclictest31019-21ssh10:00:100
244749924879,0cyclictest21943-21sh09:22:140
2447499248106,0cyclictest18966-21ssh11:19:440
244749924773,0cyclictest2431-21ntpd08:06:490
2447499247101,0cyclictest1142-21jbd2/sda1-807:24:420
2447499246102,0cyclictest7221-21latency_hist10:34:350
244749924576,0cyclictest3532-21timerandwakeup08:00:530
244749924558,0cyclictest22385-21ssh09:25:000
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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