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2022-08-20 - 07:38

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
Characteristics of the 100, highest latencies:
System rack9slot2 (updated Sat Aug 20, 2022 00:43:24)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
20422284247,25sleep30-21swapper/33
19442255186,38sleep10-21swapper/11
19432250177,16sleep00-21swapper/00
19182230194,24sleep20-21swapper/22
252892610,2sleep325291-21aten2_r9power_p3
242182460,2sleep30-21swapper/33
122052300,2sleep00-21swapper/00
235999289,16cyclictest12356-21latency_hist2
236399270,25cyclictest19864-21sh3
236399270,25cyclictest19864-21sh3
2363992417,4cyclictest28177-21basename3
190762240,2sleep20-21swapper/22
190762240,2sleep20-21swapper/22
91962230,8sleep335-21ksoftirqd/33
236399230,21cyclictest20230-40mandb3
235999234,17cyclictest6447-21cat2
235999234,17cyclictest5319-21cat2
235999234,17cyclictest16258-21latency_hist2
235999234,17cyclictest16258-21latency_hist2
2359992317,4cyclictest559-21gdbus2
234899233,9cyclictest9-21ksoftirqd/00
2348992315,5cyclictest12311-21ls0
2348992314,5cyclictest14757-21sendmail0
236399223,16cyclictest24206-21sendmail3
235999223,17cyclictest14047-21cat2
2359992216,3cyclictest22699-21sendmail-mta2
2354992217,3cyclictest26949-21ls1
2348992217,3cyclictest7202-21dump-pmu-power0
236399217,3cyclictest99472basename3
2363992117,2cyclictest0-21swapper/33
2363992116,3cyclictest16795-21cut3
2363992115,4cyclictest28661-21cat3
2363992115,4cyclictest21868-21which3
2363992115,3cyclictest15438-21tr3
235999213,16cyclictest24201-21latency_hist2
235999213,16cyclictest1635-21latency_hist2
235999213,16cyclictest0-21swapper/22
235999213,16cyclictest0-21swapper/22
235999212,17cyclictest646-21cat2
235999212,17cyclictest30314-21cat2
235999212,17cyclictest0-21swapper/22
2359992115,4cyclictest25876-21seq2
235999211,4cyclictest8834-21cron2
2359992114,4cyclictest21138-21wc2
235999211,3cyclictest505-21dbus-daemon2
235999211,3cyclictest17074-21munin-run2
235999211,18cyclictest4386-21munin-node2
235999211,17cyclictest31722-21munin-run2
2354992116,3cyclictest31957-21/usr/sbin/munin1
2354992115,4cyclictest26442-21seq1
2354992114,4cyclictest9495-21diskstats1
2348992117,2cyclictest395-21cron0
2348992115,4cyclictest30820-21/usr/sbin/munin0
2348992115,4cyclictest10288-21sed0
2348992114,4cyclictest3239-21sh0
2348992113,5cyclictest29991-21cut0
122272210,2sleep30-21swapper/33
2363992015,3cyclictest5515-21ntp_offset3
2363992015,3cyclictest308-21acpi3
2363992015,3cyclictest2543-21swap3
2363992015,3cyclictest22760-21latency3
2363992015,3cyclictest18083-21missed_timers3
2363992015,3cyclictest18083-21missed_timers3
2363992015,3cyclictest13866-21ntpq3
2363992015,3cyclictest1081-21timerwakeupswit3
2363992015,3cyclictest10704-21gltestperf3
2363992014,4cyclictest9924-21ntpq3
2363992014,4cyclictest32283-21cut3
2363992014,4cyclictest20195-21aten2_r9power_v3
236399200,2cyclictest4272-21munin-node3
2359992015,3cyclictest6823-21idleruntime2
2359992015,3cyclictest27710-21ntp_states2
2359992015,3cyclictest11071-21ntpq2
235999201,17cyclictest995-1kworker/2:0H2
235999201,17cyclictest9634-1kworker/2:0H2
235999201,17cyclictest9634-1kworker/2:0H2
235999201,17cyclictest3597-21cat2
235999201,16cyclictest654-21cut2
235999201,16cyclictest30537-21cron2
235999201,16cyclictest10643-21unixbench-2d2
235999200,2cyclictest6039-21perf2
235999200,18cyclictest9634-1kworker/2:0H2
235999200,18cyclictest29745-21perf2
2354992015,3cyclictest5197-21sh1
2354992015,3cyclictest4430-21idleruntime-cro1
2354992015,3cyclictest27480-21seq1
2354992015,3cyclictest2352-21hostname1
2354992015,3cyclictest14851-21cat1
2354992015,3cyclictest14851-21cat1
2354992014,4cyclictest7646-21cat1
2354992014,4cyclictest2561-21grep1
2354992014,4cyclictest24533-21sed1
2354992013,4cyclictest24687-21cat1
2348992015,3cyclictest639-21snmpd0
2348992015,3cyclictest639-21snmpd0
2348992015,3cyclictest4292-21/usr/sbin/munin0
2348992015,3cyclictest3969-21grep0
2348992015,3cyclictest31129-21sed0
2348992015,3cyclictest29142-21sed0
2348992015,3cyclictest14582-21expr0
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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