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2023-02-05 - 12:07

ARM Freescale i.MX6UL @528 MHz, Linux 4.16.15-rt7 (Profile)

Latency plot of system in rack #5, slot #7
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 50 highest latencies:
System rack5slot7.osadl.org (updated Sun Feb 05, 2023 00:44:14)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2027225430,14sleep032456-1kworker/u3:118:26:100
31749918020,63cyclictest11219-21apt-get23:06:060
31749916915,48cyclictest1572-21/usr/sbin/munin22:36:360
31749910617,25cyclictest17574-21irqstats21:47:000
31749910612,73cyclictest9572-21apt-get23:01:140
31749910414,67cyclictest9434-21ntpq21:22:180
31749910333,54cyclictest19348-21ssh21:52:150
31749910312,68cyclictest1987-21ssh21:00:300
31749910217,64cyclictest13396-21memory23:12:060
31749910217,47cyclictest31024-21ntp_states22:27:180
31749910217,46cyclictest16219-21apt-get23:21:070
31749910216,25cyclictest23143-21fw_conntrack23:41:450
31749910212,25cyclictest30175-21sh20:47:110
31749910212,21cyclictest19687-21/usr/sbin/munin23:31:230
31749910118,63cyclictest24627-21apt-get20:31:140
31749910117,65cyclictest7596-21irqstats21:16:580
31749910117,46cyclictest18562-21df_inode19:56:230
31749910112,27cyclictest28607-21modprobe22:20:460
3174991009,69cyclictest7982-21basename22:56:180
31749910029,54cyclictest0-21swapper23:49:270
31749910018,62cyclictest25415-21apt-get22:11:070
31749910017,44cyclictest26404-21fw_conntrack23:51:490
31749910011,67cyclictest12943-21ssh21:32:320
31749910011,26cyclictest4935-21ssh22:46:380
3174999935,48cyclictest0-21swapper20:21:220
3174999920,54cyclictest13785-21apt-get21:36:060
3174999917,62cyclictest24704-21users22:07:380
3174999916,62cyclictest8292-21munin-run19:00:470
3174999916,62cyclictest28166-21memory23:57:080
3174999916,45cyclictest7034-21munin-run21:15:490
3174999914,46cyclictest3693-21fgrep22:42:260
3174999913,26cyclictest32229-21users20:52:390
3174999913,25cyclictest3122-21users21:02:400
3174999911,67cyclictest14762-21ssh23:16:240
3174999818,23cyclictest26636-21df_inode20:36:410
3174999817,62cyclictest6783-21memory22:52:090
3174999817,44cyclictest15998-21memory21:42:130
3174999813,25cyclictest29548-21ssh22:22:280
3174999717,60cyclictest17395-21apt-get19:51:020
3174999717,18cyclictest27978-21apt-get20:41:120
3174999716,62cyclictest21632-21memory23:37:070
3174999716,38cyclictest20818-21fw_packets21:56:520
3174999714,44cyclictest10862-21entropy21:26:490
3174999711,65cyclictest22333-21cstates22:01:250
3174999710,66cyclictest20099-21/usr/sbin/munin20:06:590
3174999629,22cyclictest32182-21ssh22:31:190
3174999619,58cyclictest3844-21apt-get21:06:110
3174999611,63cyclictest19133-21ssh23:29:330
3174999520,28cyclictest24107-21memory20:26:400
3174999515,19cyclictest21328-21irqstats20:11:340
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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