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2023-01-27 - 15:55

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, Linux 4.9.20-rt16, x86_64 highest latencies:
System rack9slot2 (updated Fri Jan 27, 2023 12:43:25)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
294682322218,69sleep20-21swapper/22
294102317234,70sleep10-21swapper/11
292612275178,77sleep00-21swapper/00
3068299262256,4cyclictest2749-21sendmail1
304792252185,25sleep30-21swapper/33
3068799196189,5cyclictest2745-21sendmail2
3067499151145,3cyclictest2756-21awk0
3069199148142,3cyclictest2730-21munin-run3
261532510,2sleep326154-21aten2_r9power_e3
33762460,1sleep20-21swapper/22
106032380,1sleep20-21swapper/22
296862300,2sleep20-21swapper/22
3069199273,21cyclictest6067-21grep3
3068799266,3cyclictest0-21swapper/22
30674992513,10cyclictest28529-21sed0
88392240,3sleep00-21swapper/00
30687992417,4cyclictest23466-21/usr/sbin/munin2
3069199236,4cyclictest85332expr3
3068799234,17cyclictest28-21ksoftirqd/22
30674992312,9cyclictest12231-21/usr/sbin/munin0
3067499231,11cyclictest10681-21munin-run0
303132230,2sleep20-21swapper/22
30691992216,4cyclictest19296-21expr3
30691992215,4cyclictest21258-21threads3
30687992216,4cyclictest24963-21ls2
30682992218,2cyclictest21-21ksoftirqd/11
30682992217,3cyclictest20965-21cstates1
30682992214,6cyclictest16878-21seq1
30674992211,9cyclictest25707-21ntp_offset0
3069199212,16cyclictest13137-21sed3
30691992115,4cyclictest18991-21seq3
30691992115,4cyclictest10293-21missed_timers3
3068799219,10cyclictest29058-21sed2
3068799218,11cyclictest505-21dbus-daemon2
3068799212,17cyclictest505-21dbus-daemon2
3068799212,17cyclictest10685-21cat2
30687992116,3cyclictest8387-21cpu2
30687992115,4cyclictest979-21interrupts2
30687992114,4cyclictest6707-21diskstats2
3068799211,3cyclictest8561-1kworker/2:0H2
3068799211,3cyclictest559-21gdbus2
30687992113,6cyclictest32310-21tr2
3068799211,18cyclictest559-21gdbus2
3068799211,17cyclictest32595-21munin-run2
30682992116,3cyclictest4601-21seq1
3067499211,6cyclictest12472-21munin-run0
30674992116,3cyclictest344-21aten2_r9power_c0
30674992115,3cyclictest15445-21grep0
259952210,4sleep228-21ksoftirqd/22
252622210,2sleep30-21swapper/33
4292200,3sleep1685-21ls1
30691992016,2cyclictest7554-21aten2_r9power_e3
30691992015,3cyclictest31716-21fw_packets3
30691992015,3cyclictest28069-21acpi3
30691992015,3cyclictest28006-21timerandwakeup3
30691992015,3cyclictest27812-21gltestperf3
30691992015,3cyclictest17451-21unixbench_multi3
30691992014,4cyclictest31190-21wc3
30691992014,4cyclictest23302-21latency3
30691992014,4cyclictest20078-21sed3
30691992014,4cyclictest19098-21entropy3
3069199201,17cyclictest32265-21cron3
3068799203,15cyclictest22627-21latency_hist2
3068799203,15cyclictest14707-21latency_hist2
30687992016,2cyclictest16623-21cat2
30687992015,3cyclictest7463-21latency2
30687992015,3cyclictest5339-21expr2
30687992015,3cyclictest23950-21switchtime2
30687992015,3cyclictest18625-21seq2
3068799201,4cyclictest10681-21munin-run2
30687992014,4cyclictest27924-21cat2
30687992014,4cyclictest12954-21cat2
3068799201,17cyclictest505-21dbus-daemon2
3068799201,17cyclictest20395-21latency_hist2
3068799201,17cyclictest13951-21latency_hist2
3068799201,16cyclictest23116-21munin-run2
3068799200,4cyclictest23861-21munin-run2
3068799200,3cyclictest21882-21munin-run2
3068799200,18cyclictest17232-21grep2
3068799200,17cyclictest4256-21cat2
3068299202,16cyclictest10577-21wc1
30682992016,2cyclictest4802-21/usr/sbin/munin1
30682992015,3cyclictest32402-21sed1
30682992015,3cyclictest25833-21sh1
30682992014,4cyclictest22331-21awk1
30682992014,4cyclictest21348-21cat1
30682992014,4cyclictest13459-21/usr/sbin/munin1
30682992014,4cyclictest12373-21ntpq1
30682992014,4cyclictest10861-21cat1
30682992014,3cyclictest26418-21ls1
30682992013,4cyclictest8811-21cat1
3067499209,9cyclictest17169-21processes0
30674992015,3cyclictest8814-21sed0
30674992015,3cyclictest26770-21cron0
30674992015,3cyclictest22841-21sed0
30674992015,3cyclictest19220-21expr0
30674992015,3cyclictest18315-21seq0
30674992015,3cyclictest13679-21ls0
30674992013,4cyclictest322-21systemd-journal0
31632190,3sleep121-21ksoftirqd/11
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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