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2019-07-24 - 01:14

ARMv6-compatible processor rev 7 (v6l), Linux 4.1.15-rt15 (Profile)

Latency plot of system in rack #7, slot #3
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 -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 rack7slot3.osadl.org (updated Fri Apr 06, 2018 00:43:34)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
14816214324,90sleep014870-21users19:06:200
9738211011,12sleep09741-21munin-node00:26:000
9414210921,11sleep09442-21if_err_eth120:41:120
14496210813,11sleep014522-21cstates22:50:550
7330210611,11sleep07338-21munin-node22:26:060
28661210611,14sleep028700-21fschecks_time19:56:090
10640210512,12sleep010675-21cat20:45:560
7194210415,11sleep07231-21uname00:16:230
3754210411,11sleep03761-21unixbench_singl22:11:460
30422210411,11sleep030443-21cpu23:45:540
29679210411,11sleep029699-21munin-node23:41:380
23634210412,11sleep023660-21missed_timers23:21:230
32216210314,12sleep032235-21timerandwakeup20:06:430
1786210311,12sleep01825-21latency22:06:180
8850210212,12sleep08190-21munin-node00:21:370
24199210210,13sleep01414-21snmpd23:22:180
25220210111,13sleep025223-21diskstats21:36:020
23063210112,13sleep022695-21munin-node19:36:160
5391210011,12sleep05394-21df_inode00:11:000
3320210011,14sleep03352-21missed_timers22:11:230
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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