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2022-12-02 - 00:48

x86 Intel Atom E3950 @1600 MHz, Linux 5.6.19-rt12 (Profile)

Latency plot of system in rack #9, slot #2
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 -l100000000 -m -Sp99 -i200 -h400 -q
Total number of samples: 100 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 100, highest latencies:
System rack9slot2 (updated Thu Dec 01, 2022 00:43:24)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
72992262188,24sleep00-21swapper/00
72752252211,26sleep10-21swapper/11
74862247175,24sleep20-21swapper/22
72722233160,25sleep30-21swapper/33
776299231227,2cyclictest0-21swapper/00
777199218213,3cyclictest15197-21awk2
776799212206,3cyclictest15191-21perf1
31942430,2sleep00-21swapper/00
262222370,1sleep00-21swapper/00
19932300,2sleep20-21swapper/22
777199276,18cyclictest559-21gdbus2
7762992717,6cyclictest322-21systemd-journal0
280342270,10sleep228-21ksoftirqd/22
777199261,10cyclictest3510-21cron2
777199245,17cyclictest7498-21cat2
777199234,17cyclictest17373-21cat2
777199232,3cyclictest5539-21sleep2
7762992316,4cyclictest322-21systemd-journal0
7762992316,4cyclictest23240-21idleruntime-cro0
776299231,18cyclictest3513-21cron0
777199226,14cyclictest11489-21cron2
777199223,17cyclictest9294-21cat2
777199223,17cyclictest17772-21latency_hist2
777199222,17cyclictest25567-21cat2
7771992216,3cyclictest9843-21df_inode2
777199221,3cyclictest26163-21munin-run2
7767992216,4cyclictest28530-21seq1
7762992217,3cyclictest14225-21head0
7762992215,5cyclictest25335-21sh0
7762992215,4cyclictest7460-21dump-pmu-power0
7762992215,4cyclictest12916-21grep0
7762992214,5cyclictest665-21runrttasks0
153392220,4sleep015299-21sendmail0
7776992115,4cyclictest16660-21processes3
7771992116,3cyclictest29565-21head2
7771992115,4cyclictest7236-21seq2
777199211,3cyclictest25566-21perf2
777199211,3cyclictest15317-1kworker/2:2H2
777199211,18cyclictest21390-21munin-run2
777199211,17cyclictest9487-21sendmail2
777199211,17cyclictest2063-1kworker/2:3H2
777199210,3cyclictest28079-21basename2
777199210,3cyclictest28079-21basename2
777199210,3cyclictest20147-21plymouth2
777199210,18cyclictest14185-21cron2
7767992116,3cyclictest20037-21seq1
7767992114,4cyclictest10185-21diskstats1
776299211,4cyclictest9821-21munin-node0
7762992113,5cyclictest322-21systemd-journal0
125522210,2sleep30-21swapper/33
7776992016,2cyclictest23236-21perf3
7776992015,3cyclictest18085-21expr3
7776992015,3cyclictest15958-21seq3
7776992014,4cyclictest11737-21find3
7776992013,4cyclictest9279-21memory3
7771992015,3cyclictest9904-21users2
7771992015,3cyclictest23947-21sh2
7771992015,3cyclictest12697-21which2
7771992015,3cyclictest12512-21open_inodes2
777199201,4cyclictest505-21dbus-daemon2
7771992014,4cyclictest31162-21awk2
7771992014,4cyclictest20993-21seq2
7771992014,4cyclictest19273-21munin-run2
7771992014,4cyclictest18222-21basename2
7771992014,4cyclictest12862-21sed2
7771992013,4cyclictest322-21systemd-journal2
777199201,17cyclictest5498-21latency_hist2
777199201,17cyclictest28188-1kworker/2:0H2
777199201,17cyclictest15317-1kworker/2:2H2
777199200,18cyclictest2677-21idleruntime-cro2
776799207,4cyclictest505-21dbus-daemon1
7767992015,3cyclictest8120-21cat1
7767992015,3cyclictest7902-21/usr/sbin/munin1
7767992015,3cyclictest5746-21/usr/sbin/munin1
7767992015,3cyclictest25540-21timerwakeupswit1
7767992015,3cyclictest2357-21seq1
7767992015,3cyclictest19896-21ls1
7767992015,3cyclictest11734-21/usr/sbin/munin1
7767992015,3cyclictest11181-21seq1
7767992014,4cyclictest6180-21cat1
7767992014,4cyclictest25565-21sed1
7767992014,4cyclictest17891-21cat1
7767992014,4cyclictest14384-21cat1
776799200,6cyclictest15298-21munin-plugin-st1
7762992015,3cyclictest3768-21/usr/sbin/munin0
7762992015,3cyclictest27944-21sed0
7762992014,4cyclictest7902-21/usr/sbin/munin0
7762992014,4cyclictest24790-21ntpq0
7762992014,4cyclictest22156-21tail0
7762992014,3cyclictest16867-21gltestperf0
7762992013,5cyclictest18150-21cut0
7762992013,4cyclictest11037-21grep0
7776991917,1cyclictest0-21swapper/33
7776991914,3cyclictest8125-21sh3
7776991914,3cyclictest4927-21/usr/sbin/munin3
7776991914,3cyclictest3562-21latency3
7776991914,3cyclictest25214-21ntp_states3
7776991914,3cyclictest23936-21/usr/sbin/munin3
7776991914,3cyclictest23276-21uname3
7776991914,3cyclictest21826-21cat3
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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