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2025-07-03 - 09:08
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Data to construct the above plot have been generated using the RT test utility cyclictest.
Unexpectedly long latencies may be caused by SMIs
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.osadl.org (updated Thu Jul 03, 2025 00:43:24)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
148682312276,23sleep20-21swapper/22
132702284245,25sleep10-21swapper/11
150072275239,24sleep30-21swapper/33
149872257184,59sleep00-21swapper/00
1264921370,7sleep11520999cyclictest1
2664121060,1sleep20-21swapper/22
280982500,3sleep0101rcuc/00
33752420,2sleep00-21swapper/00
1521399293,11cyclictest5620-21taskset2
255182240,2sleep00-21swapper/00
1521399241,5cyclictest19803-21perf2
1521399241,5cyclictest19803-21perf2
1521399241,20cyclictest10333-21gdbus2
15209992415,5cyclictest21661-21ls1
243402230,3sleep20-21swapper/22
1521399233,18cyclictest21547-21latency_hist2
1521399233,17cyclictest8583-21latency_hist2
1521399232,12cyclictest4791-21chrt2
15213992317,3cyclictest1388-21munin-run2
15213992315,5cyclictest505-21dbus-daemon2
15213992315,5cyclictest505-21dbus-daemon2
1521399231,19cyclictest15995-21munin-run2
15218992217,3cyclictest18899-21open_files3
15218992217,3cyclictest18899-21open_files3
1521399223,17cyclictest27062-21cat2
1521399222,17cyclictest17104-21cut2
15213992217,3cyclictest3615-21cat2
15213992217,3cyclictest3615-21cat2
1521399221,5cyclictest27739-21munin-run2
15213992214,5cyclictest553-21grep2
1521399221,18cyclictest10333-21gdbus2
15213992211,7cyclictest505-21dbus-daemon2
1520999223,13cyclictest0-21swapper/11
15209992215,4cyclictest1384-21cron1
15209992214,5cyclictest4957-21aten2.4-expect1
15209992214,5cyclictest32297-21dump-pmu-power1
15209992213,5cyclictest505-21dbus-daemon1
15207992215,5cyclictest3321-21sendmail0
15207992215,4cyclictest18777-21cron0
15218992115,4cyclictest6474-21df_inode3
15218992115,4cyclictest505-21dbus-daemon3
15218992115,4cyclictest13132-21users3
15218992115,3cyclictest5060-21cut3
15218992115,3cyclictest505-21dbus-daemon3
15218992114,4cyclictest7568-21kernelversion3
1521399212,17cyclictest4636-21latency_hist2
1521399212,17cyclictest19589-21cat2
1521399212,17cyclictest18020-21latency_hist2
15213992115,4cyclictest9694-21diskstats2
15213992115,4cyclictest11225-21sed2
15213992115,3cyclictest17380-21cat2
1521399211,4cyclictest11483-1kworker/2:0H2
1521399211,3cyclictest11483-1kworker/2:0H2
15213992113,4cyclictest2564-21sendmail-mta2
1521399211,18cyclictest23004-21cat2
1521399211,17cyclictest3428-21latency_hist2
1521399211,17cyclictest17994-21tr2
1521399210,4cyclictest23842-21cron2
1521399210,18cyclictest18462-1kworker/2:0H2
1520999213,15cyclictest18504-21grep1
1520999213,15cyclictest18504-21grep1
15209992115,4cyclictest28045-21ntpq1
15209992115,3cyclictest17574-21cron1
15209992114,5cyclictest7010-21awk1
15209992114,4cyclictest25594-21sh1
15209992114,3cyclictest18344-21aten2.4-expect1
15209992112,5cyclictest1-21systemd1
1520999211,17cyclictest24619-21grep1
15207992115,4cyclictest32720-21seq0
15207992115,4cyclictest31681-21seq0
15207992115,4cyclictest29563-21seq0
15207992115,4cyclictest12151-21df0
15207992114,5cyclictest21913-21apt-get0
163042200,1sleep10-21swapper/11
15218992018,1cyclictest0-21swapper/33
15218992015,3cyclictest28947-21cron3
15218992015,3cyclictest23974-21ntpq3
15218992015,3cyclictest2389-21memory3
15218992015,3cyclictest2389-21memory3
15218992014,4cyclictest9681-21df3
15218992014,4cyclictest31266-21hostname3
15218992014,4cyclictest3012-21grep3
15218992014,3cyclictest665-21runrttasks3
15218992014,3cyclictest18477-21kernelversion3
15218992013,4cyclictest15820-21apt-get3
1521399203,9cyclictest9677-21apt-get2
1521399203,12cyclictest3598-21apt-get2
1521399202,16cyclictest4525-21latency_hist2
1521399202,16cyclictest25702-21latency_hist2
1521399202,16cyclictest16757-21latency_hist2
15213992015,3cyclictest505-21dbus-daemon2
15213992015,3cyclictest29650-21sed2
15213992015,3cyclictest22504-21sed2
15213992014,4cyclictest27750-21date2
15213992013,4cyclictest31046-21idleruntime2
1521399201,2cyclictest11483-1kworker/2:0H2
1521399201,17cyclictest9856-21munin-run2
1521399201,17cyclictest7971-21cat2
1521399201,17cyclictest25986-21cat2
1521399201,17cyclictest17684-21cat2
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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