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2025-12-10 - 16:59
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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 Wed Dec 10, 2025 12:43:25)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
304382318279,26sleep10-21swapper/11
303282308270,25sleep30-21swapper/33
288182280242,25sleep00-21swapper/00
3076399262258,2cyclictest0-21swapper/22
3076199243237,4cyclictest8333-21strings1
305542240204,24sleep20-21swapper/22
3075799216211,3cyclictest0-21swapper/00
114821580,6sleep13076199cyclictest1
3077199130126,2cyclictest0-21swapper/33
27192640,4sleep13076199cyclictest1
236092520,4sleep13076199cyclictest1
258122510,2sleep30-21swapper/33
96732450,3sleep33077199cyclictest3
282512440,1sleep10-21swapper/11
36872350,2sleep20-21swapper/22
141422350,1sleep00-21swapper/00
30771993213,3cyclictest31996-21cat3
30771993212,4cyclictest4038-21sed3
30771993113,3cyclictest4660-21memory3
30771993013,3cyclictest7975-21proc_pri3
30763993025,3cyclictest5699-21dump-pmu-power2
3076399301,25cyclictest31868-21awk2
3077199282,8cyclictest14138-21apt-get3
30763992815,11cyclictest281ksoftirqd/22
30761992516,5cyclictest2886-21sendmail1
137362250,2sleep113741-21sed1
30761992417,4cyclictest27145-21ls1
3075799243,20cyclictest0-21swapper/00
174302240,5sleep117435-21pmu-power1
45452230,2sleep30-21swapper/33
30771992318,3cyclictest28093-21head3
3076399236,15cyclictest0-21swapper/22
30763992316,4cyclictest4097-21sh2
30763992315,5cyclictest12839-21df2
30763992312,6cyclictest1098-21apt-get2
3076399230,21cyclictest14760-21kworker/2:02
30761992314,5cyclictest4930-21sh1
30761992313,6cyclictest26648-21sendmail1
3076399223,17cyclictest6442-21latency_hist2
30763992216,4cyclictest26630-21munin-run2
3076399221,3cyclictest29398-21apt-get2
3076399221,3cyclictest27197-21apt-get2
3076399221,3cyclictest22566-21munin-run2
3076399221,2cyclictest9769-21munin-run2
3076399221,18cyclictest14133-21munin-run2
3076399220,20cyclictest6706-21latency_hist2
30761992214,4cyclictest32108-21sh1
30761992212,6cyclictest505-21dbus-daemon1
30757992215,4cyclictest27186-21cat0
30757992211,8cyclictest30256-21cut0
30771992116,3cyclictest26624-21cron3
30771992116,3cyclictest23898-21find3
30771992115,4cyclictest9428-21expr3
30771992115,4cyclictest19651-21uname3
3076399219,11cyclictest28-21ksoftirqd/22
3076399213,13cyclictest10369-21apt-get2
3076399213,13cyclictest10369-21apt-get2
3076399212,17cyclictest16477-21cat2
30763992115,4cyclictest22857-21which2
3076399211,3cyclictest2046-1kworker/2:0H2
3076399210,18cyclictest23296-1kworker/2:2H2
3076399210,18cyclictest20432-21cut2
30761992114,4cyclictest16450-21grep1
30761992111,6cyclictest5978-21apt-get1
30757992115,4cyclictest8034-21seq0
199242210,5sleep1211ksoftirqd/11
30771992015,3cyclictest7983-21acpi3
30771992015,3cyclictest20654-21sed3
30771992015,3cyclictest11700-21interrupts3
30771992014,4cyclictest23982-21sed3
30771992013,4cyclictest31266-21grep3
30771992012,5cyclictest505-21dbus-daemon3
3076399207,2cyclictest111rcu_preempt2
3076399206,8cyclictest26385-21dump-pmu-power2
30763992016,2cyclictest14868-21df_inode2
30763992015,3cyclictest23883-21sendmail_mailst2
30763992015,3cyclictest17557-21tr2
30763992014,4cyclictest699-21sed2
30763992014,4cyclictest23683-21df2
30763992014,3cyclictest18582-21vmstat2
3076399201,1cyclictest23913-21apt-get2
3076399201,17cyclictest19706-21sendmail-mta2
3076399201,17cyclictest11115-21cups-browsed2
3076399200,3cyclictest23014-21munin-run2
3076399200,3cyclictest2082-21systemd-journal2
3076399200,2cyclictest1890-21apt2
30761992015,3cyclictest21433-21irqstats1
30761992015,3cyclictest18762-21/usr/sbin/munin1
30761992014,4cyclictest16078-21grep1
30761992013,5cyclictest22317-21cron1
30761992013,4cyclictest665-21runrttasks1
30761992013,4cyclictest14712-21pmu-power1
30761992012,5cyclictest27386-21basename1
30761992011,5cyclictest1892-21apt-get1
30757992015,3cyclictest32460-21seq0
30757992015,3cyclictest22285-21gzip0
30757992014,4cyclictest30465-21cat0
30757992014,4cyclictest22320-21seq0
30757992014,4cyclictest20929-21seq0
295252200,1sleep10-21swapper/11
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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