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2025-12-19 - 22:44
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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 50 highest latencies:
System rackbslot7.osadl.org (updated Fri Dec 19, 2025 12:44:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
19566215011,39sleep119572-21munin-run07:09:351
196919911855,56cyclictest26644-21sh10:49:330
196919911549,56cyclictest475-21modprobe07:49:330
196919911549,56cyclictest475-21modprobe07:49:330
196969910864,36cyclictest0-21swapper/111:34:441
197019910659,34cyclictest0-21swapper/210:34:372
197019910655,39cyclictest0-21swapper/211:34:362
196919910553,45cyclictest0-21swapper/010:34:580
196919910347,45cyclictest0-21swapper/008:25:080
19691991033,25cyclictest15715-21/usr/sbin/munin11:55:050
18794210310,66sleep218836-21sendmail_mailqu07:05:162
196919910250,45cyclictest0-21swapper/007:14:430
196969910058,35cyclictest0-21swapper/110:15:081
1953229918,55sleep019558-21munin-run07:09:340
19696999759,31cyclictest0-21swapper/111:00:101
19691999744,45cyclictest0-21swapper/009:24:360
19691999744,45cyclictest0-21swapper/009:24:360
19691999742,49cyclictest19681-21cyclictest09:45:100
1969199973,20cyclictest27530-21apt-get12:29:550
1969199973,20cyclictest27530-21apt-get12:29:550
19701999658,31cyclictest0-21swapper/211:05:042
19701999654,35cyclictest0-21swapper/207:15:112
19691999648,42cyclictest0-21swapper/008:54:560
1969199964,13cyclictest20837-21apt-get12:09:470
19691999618,24cyclictest21690-21seq10:33:190
19701999550,38cyclictest0-21swapper/208:45:092
1969199953,20cyclictest2091-21latency_hist07:54:360
1969199953,20cyclictest2091-21latency_hist07:54:360
19691999531,54cyclictest0-21swapper/007:34:360
19701999451,35cyclictest0-21swapper/209:10:092
19701999451,35cyclictest0-21swapper/209:10:092
1969199943,21cyclictest4307-21cstates11:19:530
1969199943,19cyclictest17244-21apt-get10:19:450
1969199942,29cyclictest27008-21cstates10:49:500
1969199932,21cyclictest17071-21apt-get11:59:470
19691999319,21cyclictest9347-21fschecks_count09:54:560
1969199925,12cyclictest14125-21apt-get11:49:450
1969199925,11cyclictest19872-21apt-get07:09:450
1969199922,21cyclictest24451-21unixbench_multi07:20:080
19701999153,32cyclictest0-21swapper/211:49:502
19696999172,13cyclictest27203-21latency_hist12:29:351
19696999167,16cyclictest19681-21cyclictest07:54:551
19691999135,51cyclictest0-21swapper/011:29:570
19691999134,49cyclictest20181-21cron10:29:330
19691999133,52cyclictest0-21swapper/012:29:360
1969199913,22cyclictest28503-21/usr/sbin/munin10:55:220
1969199913,20cyclictest29141-21apt-get12:34:480
1969199913,20cyclictest29141-21apt-get12:34:480
1969199912,25cyclictest10019-21grep08:16:060
1969199912,22cyclictest4329-21apt-get09:39:460
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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