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2025-11-30 - 01:16
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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 Sat Nov 29, 2025 12:43:25)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
152812323262,49sleep20-21swapper/22
153802272207,33sleep00-21swapper/00
156602256200,43sleep30-21swapper/33
138882248209,26sleep10-21swapper/11
1584199223219,2cyclictest0-21swapper/33
1582599214208,4cyclictest4053-21strings0
1583699206202,2cyclictest0-21swapper/22
1583399183179,2cyclictest0-21swapper/11
3203921570,2sleep30-21swapper/33
1582599501,34cyclictest11270-21apt-get0
1582599472,29cyclictest17802-21apt-get0
15825994611,24cyclictest9-21ksoftirqd/00
52122450,1sleep30-21swapper/33
303362450,1sleep00-21swapper/00
1582599452,26cyclictest31619-21apt-get0
1582599452,26cyclictest31619-21apt-get0
1582599431,3cyclictest218981latency_hist0
166222410,1sleep00-21swapper/00
166222410,1sleep00-21swapper/00
1583699390,25cyclictest6831-21taskset2
1582599380,3cyclictest8942-21apt-get0
1582599371,3cyclictest27723-21sed0
1582599370,3cyclictest30453-21ntpq0
15841993513,5cyclictest505-21dbus-daemon3
15841993513,4cyclictest21870-21expr3
1583699350,25cyclictest0-21swapper/22
1582599353,26cyclictest5285-21apt-get0
1582599352,26cyclictest24909-21apt-get0
1582599342,26cyclictest15350-21apt-get0
15825993412,20cyclictest4368-21seq0
15825993412,20cyclictest16694-21sed0
15825993411,20cyclictest27873-21cat0
1582599340,4cyclictest25635-21taskset0
15836993311,9cyclictest0-21swapper/22
1583699330,30cyclictest10922-21cat2
1582599332,25cyclictest8716-21apt-get0
1582599331,28cyclictest6430-21perf0
15825993312,18cyclictest23512-21aten2_r9power_c0
15825993311,19cyclictest9636-21grep0
15825993310,20cyclictest28170-21grep0
15841993214,3cyclictest22241-21sed3
15841993212,4cyclictest7172-21date3
15836993215,14cyclictest10486-21munin-run2
1583699320,3cyclictest29655-21/usr/sbin/munin2
1583699320,29cyclictest6063-21latency_hist2
15833993229,2cyclictest201rcuc/11
1582599322,24cyclictest28253-21apt-get0
1582599322,23cyclictest21411-21/usr/sbin/munin0
1582599321,26cyclictest6688-21apt-get0
1582599321,25cyclictest18899-21apt-get0
15825993212,18cyclictest17383-21/usr/sbin/munin0
15825993212,18cyclictest17383-21/usr/sbin/munin0
15825993210,19cyclictest21159-21irqstats0
1584199311,9cyclictest28003-21munin-run3
15841993112,3cyclictest17579-21cpuspeed3
15841993112,3cyclictest17579-21cpuspeed3
15841993112,3cyclictest11644-21expr3
1584199310,29cyclictest23877-21kworker/3:23
15836993115,14cyclictest22811-21irqstats2
15836993115,13cyclictest1248-21aten2_r9power_e2
15836993113,15cyclictest2352-21munin-run2
1583699311,27cyclictest21191-21munin-run2
1583699311,23cyclictest21477-21apt-get2
1583699310,19cyclictest0-21swapper/22
1583699310,18cyclictest0-21swapper/22
1582599318,20cyclictest2499-21grep0
1582599314,24cyclictest11397-21mailstats0
1582599312,26cyclictest29198-21cpuspeed_turbos0
1582599312,24cyclictest807-21apt-get0
1582599312,24cyclictest7304-21apt-get0
1582599312,23cyclictest6909-21apt-get0
1582599312,23cyclictest26230-21apt-get0
1582599312,23cyclictest16871-21apt-get0
1582599312,23cyclictest11373-21apt-get0
1582599311,4cyclictest18502-21apt-get0
1582599311,25cyclictest22883-21apt-get0
1582599311,23cyclictest22180-21apt-get0
1582599310,3cyclictest2788-21taskset0
1582599310,1cyclictest32627-21apt-get0
1582599310,1cyclictest32627-21apt-get0
15841993013,4cyclictest1183-21/usr/sbin/munin3
15841993012,4cyclictest505-21dbus-daemon3
15841993012,3cyclictest18843-21expr3
15841993011,4cyclictest25766-21cpuspeed_turbos3
15841993011,3cyclictest28012-21awk3
1583699301,26cyclictest302-21munin-run2
15836993012,15cyclictest6001-21sed2
15836993012,15cyclictest14696-21grep2
1583699300,3cyclictest13073-21munin-run2
1582599303,22cyclictest20926-21apt-get0
1582599303,21cyclictest12375-21apt-get0
1582599302,23cyclictest6061-21sendmail-mta0
1582599302,23cyclictest14429-21apt-get0
1582599302,23cyclictest13326-21apt-get0
1582599302,22cyclictest25527-21apt-get0
1582599302,22cyclictest18623-21apt-get0
1582599300,3cyclictest1620-21gzip0
15841992913,3cyclictest9372-21sh3
15836992912,15cyclictest17763-21/usr/sbin/munin2
15836992912,14cyclictest5716-21nfs4_client2
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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