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2022-06-29 - 15:19

x86 Intel Atom x6425RE @1900 MHz, Linux 5.18.0-rt11 (Profile)

Latency plot of system in rack #e, slot #7
Data to construct the above plot have been generated using the RT test utility cyclictest.
Unexpectedly long latencies may be caused by SMIs
Command line: cyclictest -l100000000 -m -Sp99 -i200 -h800 -q
Total number of samples: 100 million
Resolution of latency scale: reduced 
Duration: 5 hours, 33 minutes, lowest P state: performance
Characteristics of the 50 highest latencies:
System rackeslot7.osadl.org (updated Mon Jun 06, 2022 00:44:13)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1917936997062,3cyclictest2004443-21latency_hist20:30:020
1917927996759,4cyclictest2070154-21apt-get21:25:120
1917927996659,3cyclictest1923310-21latency_hist19:15:020
1917936996560,2cyclictest2288164-21kworker/u8:0+flush-8:000:10:320
1917936996558,3cyclictest267-21systemd-journal23:25:010
1917927996558,3cyclictest2299193-21apt-get23:55:110
1917927996454,6cyclictest267-21systemd-journal19:45:020
1917927996357,2cyclictest2283053-21latency_hist23:45:020
1917936996254,6cyclictest267-21systemd-journal19:35:010
1917936996251,9cyclictest267-21systemd-journal23:50:270
1917927996255,3cyclictest267-21systemd-journal22:30:010
1917936996152,7cyclictest267-21systemd-journal21:00:020
1917936996055,3cyclictest1185-21rs:main0
1917936995952,5cyclictest2283804-21apt-get23:45:120
1917927995848,8cyclictest2085403-21apt-get21:35:120
1917936995750,4cyclictest2169010-21apt-get22:30:120
1917927995651,3cyclictest2176578-21apt-get22:35:110
750589550,0phc2sys0-21swapper/121:41:171
1917936995549,4cyclictest1185-21rs:main0
1917936995249,2cyclictest2077413-21kworker/u8:2+events_unbound22:05:180
1917927995247,3cyclictest2015111-21latency_hist20:40:010
750589510,1phc2sys0-21swapper/121:32:171
1917936995147,3cyclictest267-21systemd-journal21:50:100
1917927995146,3cyclictest2352011-21apt-get00:30:130
1917936995047,2cyclictest2009852-21kworker/u8:1+flush-8:021:10:410
1917936994946,2cyclictest2168702-21kworker/u8:3+events_unbound22:45:310
1917936994944,3cyclictest267-21systemd-journal22:55:010
1917936994943,4cyclictest1993602-21gpgv20:20:010
1917927994943,5cyclictest2268101-21apt-get23:35:120
1917936994845,2cyclictest2054781-21kworker/u8:4+flush-8:021:33:370
1917936994844,3cyclictest2213080-21kworker/u8:1+flush-8:023:15:310
1917936994842,4cyclictest267-21systemd-journal23:31:110
1917936994741,4cyclictest267-21systemd-journal21:05:000
1917936994639,6cyclictest267-21systemd-journal23:10:230
1917936994639,6cyclictest267-21systemd-journal21:15:150
1917927994640,4cyclictest1972390-21apt-get20:00:130
750589450,0phc2sys0-21swapper/123:56:071
1917936994540,3cyclictest2004756-21apt-get20:30:110
750589440,1phc2sys0-21swapper/123:13:521
750589440,0phc2sys0-21swapper/123:21:571
1917936994441,2cyclictest2009852-21kworker/u8:1+flush-8:021:23:040
1917936994440,3cyclictest2183047-21kworker/u8:0+flush-8:022:44:420
1917936994439,3cyclictest267-21systemd-journal20:45:010
1917936994439,3cyclictest1185-21rs:main0
1917931994437,2cyclictest2306926-21apt-get00:00:130
750589430,1phc2sys0-21swapper/122:31:371
750589430,0phc2sys0-21swapper/121:20:371
750589430,0phc2sys0-21swapper/120:20:231
1917936994340,2cyclictest2336642-21kworker/u8:0+events_unbound00:39:320
1917936994340,2cyclictest2100312-21kworker/u8:0+events_unbound21:46:560
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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