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2025-11-24 - 15:17
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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 Mon Nov 24, 2025 12:43:25)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
77182304274,17sleep30-21swapper/33
68022284203,69sleep00-21swapper/00
796599278275,2cyclictest0-21swapper/33
76972256193,50sleep20-21swapper/22
76202234196,26sleep10-21swapper/11
795599195190,3cyclictest1880-21strings0
795999175171,2cyclictest0-21swapper/11
2224421450,4sleep1795999cyclictest1
79639910096,2cyclictest0-21swapper/22
80112470,2sleep30-21swapper/33
193762410,1sleep00-21swapper/00
295942300,4sleep09-21ksoftirqd/00
224202290,2sleep10-21swapper/11
7963992816,6cyclictest665-21runrttasks2
7963992816,6cyclictest665-21runrttasks2
88922260,1sleep20-21swapper/22
796399261,21cyclictest21109-21sendmail-mta2
7955992618,4cyclictest665-21runrttasks0
7955992617,6cyclictest8175-21apt-get0
796599254,18cyclictest27354-21cut3
7963992517,5cyclictest31918-21sh2
796399251,5cyclictest11999-21awk2
7955992518,4cyclictest1498-21sh0
17672250,2sleep00-21swapper/00
796399244,17cyclictest7415-21cat2
796399243,18cyclictest4912-21latency_hist2
796399242,4cyclictest0-21swapper/22
796399242,19cyclictest2082-21systemd-journal2
7963992416,5cyclictest3530-21sh2
796399241,20cyclictest10333-21gdbus2
796599239,12cyclictest10333-21gdbus3
796399234,17cyclictest9215-21cat2
796399234,17cyclictest17000-21cat2
796399231,4cyclictest4538-21munin-run2
795599233,11cyclictest9-21ksoftirqd/00
795599232,19cyclictest28722-21grep0
7955992315,5cyclictest27213-21idleruntime-cro0
795599231,18cyclictest0-21swapper/00
176542230,3sleep117746-21diskstats1
7965992217,3cyclictest15128-21apt3
7965992216,4cyclictest23725-21cut3
796399224,16cyclictest24511-21awk2
796399223,17cyclictest27147-21latency_hist2
796399223,17cyclictest23100-21latency_hist2
796399222,17cyclictest0-21swapper/22
7963992213,5cyclictest505-21dbus-daemon2
796399221,19cyclictest30893-21sendmail2
796399221,18cyclictest830-21sendmail-mta2
7955992210,3cyclictest20077-21seq0
7965992116,3cyclictest27952-21gltestperf3
7965992116,3cyclictest16351-21df_inode3
7965992116,3cyclictest13204-21latency3
7965992115,4cyclictest15892-21if_err_enp2s03
7965992115,4cyclictest11275-21ls3
7965992111,6cyclictest21371-21apt-get3
796599210,5cyclictest0-21swapper/33
796599210,20cyclictest0-21swapper/33
7963992115,3cyclictest13276-21wc2
7963992115,3cyclictest13276-21wc2
796399211,3cyclictest18746-1kworker/2:2H2
796399211,18cyclictest10004-21cat2
796399211,17cyclictest23133-21cron2
796399211,17cyclictest21975-21procmail2
796399211,17cyclictest13304-21cron2
796399210,3cyclictest27842-21munin-run2
796399210,19cyclictest6354-21kworker/2:12
796399210,18cyclictest1617-21cat2
7959992116,3cyclictest25025-21/usr/sbin/munin1
7959992116,3cyclictest10898-21/usr/sbin/munin1
7959992115,4cyclictest505-21dbus-daemon1
7959992110,6cyclictest19189-21apt-get1
795599217,4cyclictest3089-21grep0
795599213,11cyclictest665-21runrttasks0
7955992116,3cyclictest26917-21ntpq0
7955992114,4cyclictest23096-21cron0
7955992113,4cyclictest28156-21aten2.4-expect0
796599209,8cyclictest7479-21cut3
7965992016,2cyclictest10626-21df3
7965992015,3cyclictest7862-21expr3
7965992015,3cyclictest5265-21head3
7965992015,3cyclictest31064-21open_inodes3
7965992015,3cyclictest26016-21irqstats3
7965992015,3cyclictest24475-21diskstats3
7965992015,3cyclictest24396-21sendmail_mailst3
7965992015,3cyclictest21287-21if_err_enp3s03
7965992015,3cyclictest1801-21aten2_r9power_e3
7965992015,3cyclictest1761-21kernelversion3
7965992015,3cyclictest17603-21forks3
7965992015,3cyclictest17302-21/usr/sbin/munin3
7965992015,3cyclictest14573-21/usr/sbin/munin3
7965992014,4cyclictest5886-21fw_packets3
7965992014,4cyclictest26471-21cat3
7965992013,4cyclictest22459-21df3
7965992013,4cyclictest13713-21cat3
796399209,6cyclictest505-21dbus-daemon2
796399203,15cyclictest0-21swapper/22
796399202,10cyclictest9516-21taskset2
7963992016,2cyclictest27954-21ntp_states2
7963992016,2cyclictest15221-21interrupts2
7963992014,3cyclictest2082-21systemd-journal2
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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