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2025-12-12 - 16:35
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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 (updated Fri Dec 12, 2025 00:43:25)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
171882315279,23sleep30-21swapper/33
172172306267,26sleep10-21swapper/11
171952297230,53sleep00-21swapper/00
173282243172,23sleep20-21swapper/22
1751199229219,8cyclictest0-21swapper/33
1750499191183,6cyclictest10294-21munin-run1
1750799168160,5cyclictest10322-21basename2
1750099109101,6cyclictest10307-21sendmail0
317122560,2sleep21750799cyclictest2
173962520,2sleep30-21swapper/33
246832510,3sleep30-21swapper/33
325682470,1sleep10-21swapper/11
231212430,1sleep30-21swapper/33
135572400,1sleep00-21swapper/00
1750799286,20cyclictest0-21swapper/22
1750799234,17cyclictest15539-21cat2
1750799233,18cyclictest2082-21systemd-journal2
17504992316,4cyclictest2082-21systemd-journal1
17511992214,6cyclictest20577-21cron3
1750799229,10cyclictest27047-21kernelversion2
1750799228,11cyclictest18497-21sort2
1750799223,17cyclictest7233-21cat2
1750799223,17cyclictest20875-21latency_hist2
1750799223,17cyclictest0-21swapper/22
17507992217,3cyclictest29319-21open_inodes2
17507992216,4cyclictest6338-21perf2
17507992216,4cyclictest25745-21seq2
17500992217,3cyclictest17840-21idleruntime-cro0
17500992216,3cyclictest934-21sh0
165082220,1sleep30-21swapper/33
17511992115,4cyclictest32537-21dump-pmu-power3
17511992114,4cyclictest28171-21idleruntime-cro3
1750799218,11cyclictest1-21systemd2
1750799213,15cyclictest0-21swapper/22
1750799212,17cyclictest940-21turbostat2
1750799212,17cyclictest22781-21cat2
17507992115,4cyclictest5078-21cut2
17507992114,4cyclictest22794-21seq2
1750799211,18cyclictest12428-21munin-run2
1750799211,18cyclictest0-21swapper/22
1750799210,19cyclictest5760-21kworker/2:22
1750799210,19cyclictest15559-1kworker/2:0H2
17504992116,3cyclictest29640-21sed1
17504992115,4cyclictest24781-21seq1
17504992115,4cyclictest20820-21seq1
17504992114,4cyclictest4828-21cat1
17504992114,4cyclictest2082-21systemd-journal1
1750499210,18cyclictest16049-21apt-get1
1750099218,8cyclictest665-21runrttasks0
17500992116,3cyclictest9-21ksoftirqd/00
17511992017,2cyclictest0-21swapper/33
17511992015,3cyclictest17826-21latency_hist3
17511992014,4cyclictest20984-21ntpq3
17511992014,3cyclictest24609-21df3
17511992013,4cyclictest11875-21grep3
1750799207,11cyclictest28-21ksoftirqd/22
1750799207,11cyclictest0-21swapper/22
1750799202,16cyclictest28263-21cat2
17507992016,2cyclictest2696-21cstates2
17507992015,3cyclictest7636-21sendmail_mailst2
17507992015,3cyclictest26079-21ntp_offset2
17507992015,3cyclictest24228-21sendmail_mailst2
17507992015,3cyclictest19157-21cstates2
17507992015,3cyclictest17564-21missed_timers2
17507992015,3cyclictest13927-21cat2
17507992015,3cyclictest13004-21unixbench_singl2
17507992015,3cyclictest10391-21latency_hist2
17507992015,3cyclictest10391-21latency_hist2
17507992014,4cyclictest19076-21expr2
17507992014,4cyclictest18527-21fw_packets2
1750799201,3cyclictest28603-21munin-run2
1750799201,3cyclictest28603-21munin-run2
1750799201,17cyclictest26565-1kworker/2:2H2
1750799201,17cyclictest24553-21latency_hist2
1750799201,17cyclictest23998-21cat2
1750799201,17cyclictest22505-21latency_hist2
1750799201,15cyclictest0-21swapper/22
1750799200,17cyclictest8273-21munin-run2
17504992015,3cyclictest20812-21seq1
17504992015,3cyclictest18586-21sed1
17504992015,3cyclictest17907-21cpuspeed_turbos1
17504992014,4cyclictest23095-21cut1
17504992014,4cyclictest16639-21date1
17504992014,4cyclictest12996-21df1
17504992014,4cyclictest1166-21seq1
17504992014,3cyclictest22064-21sendmail1
1750099203,15cyclictest24657-21grep0
17500992015,3cyclictest355-21cpuspeed0
17500992015,3cyclictest30599-21sendmail_mailst0
17500992015,3cyclictest18315-21seq0
17500992014,4cyclictest25898-21expr0
17500992014,4cyclictest22501-21sh0
17500992014,4cyclictest15143-21expr0
17500992013,5cyclictest665-21runrttasks0
17500992013,5cyclictest665-21runrttasks0
17511991916,2cyclictest0-21swapper/33
17511991915,2cyclictest3211-21/usr/sbin/munin3
17511991914,3cyclictest5228-21/usr/sbin/munin3
17511991914,3cyclictest325-21cpuspeed3
17511991914,3cyclictest28843-21/usr/sbin/munin3
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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