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2026-08-17 - 09:09
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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
Characteristics of the 100 highest latencies:
System rackdslot0.osadl.org (updated Mon Aug 17, 2026 00:45:56)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1923992727,0cyclictest0-21swapper/023:37:550
1927992516,9cyclictest0-21swapper/100:34:171
192799240,5cyclictest0-21swapper/100:10:191
1923992414,5cyclictest0-21swapper/021:45:180
193299235,12cyclictest0-21swapper/219:15:112
192399230,5cyclictest0-21swapper/022:05:150
1932992215,4cyclictest30407-21perf23:50:002
192799222,15cyclictest17557-21date20:35:011
1923992219,2cyclictest399-20systemd-journal20:30:010
1927992118,2cyclictest1274-21runrttasks19:26:541
192399212,18cyclictest0-21swapper/000:08:170
192399212,18cyclictest0-21swapper/000:08:170
192399210,5cyclictest0-21swapper/019:56:030
192399210,5cyclictest0-21swapper/000:11:060
1932992016,3cyclictest0-21swapper/220:08:592
193299200,3cyclictest26257-21wc00:40:012
192399204,15cyclictest0-21swapper/022:50:400
1932991917,1cyclictest1521-21lxd20:36:502
193299190,18cyclictest0-21swapper/222:28:322
193299190,15cyclictest0-21swapper/220:44:202
192799192,2cyclictest24252-21cat00:35:141
1927991917,1cyclictest0-21swapper/123:23:091
1927991917,1cyclictest0-21swapper/123:08:201
1927991917,1cyclictest0-21swapper/122:25:421
1927991910,0cyclictest0-21swapper/100:18:421
192799190,2cyclictest20469-21fschecks_time21:35:141
192799190,18cyclictest0-21swapper/122:41:191
192399193,1cyclictest25728-21timerwakeupswit20:45:230
192399193,1cyclictest11725-21grep21:20:130
192399192,16cyclictest25286-21date21:45:010
192399192,16cyclictest12951-21chrt19:28:360
192399192,16cyclictest0-21swapper/023:15:160
1923991917,1cyclictest0-21swapper/020:36:330
1923991916,2cyclictest21714-21latency_hist19:45:000
192399190,1cyclictest0-21swapper/021:29:270
1932991815,2cyclictest23659-21nfsd423:35:202
1932991814,3cyclictest19045-21anvil21:31:002
1927991815,2cyclictest4035-21H222:10:211
192799181,16cyclictest18680-21expr00:25:151
192799180,16cyclictest12039-21cron22:17:011
192399182,2cyclictest8751-21perf20:20:000
192399182,2cyclictest25330-21basename19:50:160
1923991816,1cyclictest0-21swapper/022:30:010
1923991815,2cyclictest26396-21/usr/sbin/munin23:40:170
1923991815,2cyclictest17436-21nfsd419:35:170
1923991814,3cyclictest455-21plymouthd21:00:210
1923991814,3cyclictest19181-21runrttasks23:28:250
1923991814,1cyclictest0-21swapper/022:45:200
192399181,2cyclictest7372-21chrt19:17:080
192399181,2cyclictest32302-21chrt20:04:240
192399181,2cyclictest31391-21taskset20:57:110
192399181,1cyclictest0-21swapper/021:33:460
192399181,16cyclictest10457-21awk20:20:190
192399181,16cyclictest0-21swapper/019:45:550
192399180,3cyclictest10102-21grep21:15:190
192399180,17cyclictest9536-21latency_hist22:15:010
192399180,17cyclictest8008-21apt-get21:15:010
192399180,17cyclictest15488-21grep23:20:170
192399180,17cyclictest0-21swapper/000:40:010
192399180,16cyclictest10409-21cat19:25:000
1932991715,1cyclictest0-21swapper/223:20:012
1932991715,1cyclictest0-21swapper/222:30:172
1932991714,2cyclictest6420-21apache_processe20:15:122
1932991714,2cyclictest5287-21perf21:10:002
1932991714,2cyclictest30782-21processes20:55:212
1932991714,2cyclictest30117-21smtpd21:51:132
1932991714,2cyclictest21077-21expr21:35:192
1932991714,2cyclictest13950-21sshd20:26:482
1932991714,2cyclictest1157-21/usr/sbin/munin23:55:192
1932991714,2cyclictest10767-21systemctl20:20:212
193299171,2cyclictest30794-21pzem_power22:50:212
193299171,1cyclictest0-21swapper/219:45:182
193299171,15cyclictest0-21swapper/220:01:592
193299170,2cyclictest6690-21nfsd423:05:162
193299170,2cyclictest27193-21sed21:45:212
193299170,2cyclictest2007-21systemd-journal21:15:592
193299170,2cyclictest1521-21lxd20:14:512
193299170,16cyclictest7198-21processes21:10:212
193299170,16cyclictest7166-21cpuspeed_turbos00:05:152
193299170,16cyclictest7166-21cpuspeed_turbos00:05:152
193299170,16cyclictest32040-21/usr/sbin/munin21:00:162
193299170,16cyclictest3114-21cat23:00:162
193299170,16cyclictest28752-21taskset22:49:022
193299170,16cyclictest26711-21ntp_kernel_err23:40:172
193299170,16cyclictest24673-21proxymap21:41:042
193299170,16cyclictest21169-21cstates22:35:132
193299170,16cyclictest21016-21cat00:30:122
193299170,16cyclictest20666-21pzem_power19:40:212
193299170,16cyclictest20225-21pickup22:11:002
193299170,16cyclictest15007-21fschecks_time21:25:172
193299170,16cyclictest14872-21gpgv20:30:022
193299170,16cyclictest10403-21cstates22:15:152
192799172,1cyclictest0-21swapper/119:10:151
1927991715,1cyclictest4100-21H222:10:211
1927991715,1cyclictest293352sleep119:56:321
1927991714,2cyclictest9025-21anacron00:05:571
1927991714,2cyclictest9025-21anacron00:05:561
1927991714,2cyclictest6035-21idleruntime19:15:141
1927991714,2cyclictest5050-21perl22:05:151
1927991714,2cyclictest3450-21gsd-color22:55:241
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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