You are here: Home / Projects / OSADL QA Farm Real-time / Latency plots / 
2022-10-04 - 09:44

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 20 highest latencies:
System rack5slot7.osadl.org (updated Tue Oct 04, 2022 00:44:13)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
14137224052215,138sleep00-21swapper18:33:350
145279917021,23cyclictest18834-21apt-get21:22:110
145279916911,136cyclictest9490-21grep22:33:160
145279916816,41cyclictest31786-21apt-get22:02:110
145279916620,38cyclictest4033-21munin-run22:16:500
145279916619,26cyclictest9547-21fw_conntrack20:52:550
145279916533,114cyclictest20167-21cat23:06:530
145279916519,23cyclictest29184-21ntp_states21:53:170
145279916515,42cyclictest14000-21apt-get21:07:110
145279916511,30cyclictest4950-21grep20:38:330
145279916432,108cyclictest0-21swapper23:58:540
145279916421,26cyclictest20456-21apt-get21:27:100
145279916418,41cyclictest28455-21munin-run21:51:510
145279916413,44cyclictest30784-21/usr/sbin/munin21:58:180
145279916330,31cyclictest4125-21diskmemload22:17:100
145279916321,42cyclictest956-21apt-get22:07:140
145279916318,27cyclictest7403-21/usr/sbin/munin20:46:520
145279916226,23cyclictest0-21swapper19:22:490
145279916217,37cyclictest1513-21apt-get20:22:080
145279916216,43cyclictest5840-21ntp_states00:03:170
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

Valid XHTML 1.0 Transitional