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2026-04-22 - 03:10
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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 Wed Apr 22, 2026 00:44:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
16480217110,27sleep20-21swapper/218:58:032
16668212911,76sleep18637-21kworker/u18:1+ext4-rsv-conversion18:58:351
17920991172,45cyclictest2731-21apt-get19:52:550
17920991172,45cyclictest2731-21apt-get19:52:550
17920991103,42cyclictest7560-21apt-get20:07:530
179209910954,49cyclictest297-21systemd-logind19:07:420
179209910954,49cyclictest297-21systemd-logind19:07:420
17920991095,27cyclictest14672-21/usr/sbin/munin22:33:200
17920991073,36cyclictest27131-21latency_hist23:47:440
179209910643,56cyclictest0-21swapper/021:17:410
17920991063,33cyclictest17918-21cyclictest19:02:460
179309910577,19cyclictest25060-21diskmemload00:23:061
179209910536,61cyclictest0-21swapper/023:37:560
17920991053,37cyclictest352-21runrttasks00:16:020
17920991047,16cyclictest9360-21ssh23:18:090
17920991043,21cyclictest19695-21cut00:28:380
17920991033,32cyclictest20147-21/usr/sbin/munin19:08:190
17920991033,32cyclictest20147-21/usr/sbin/munin19:08:190
17920991033,31cyclictest30727-21ssh22:04:170
17920991033,31cyclictest30727-21ssh22:04:170
179209910313,12cyclictest0-21swapper/021:23:160
17920991024,32cyclictest31727-21latency_hist19:42:430
17920991023,29cyclictest15855-21fschecks_count20:33:030
17920991023,13cyclictest0-21swapper/000:08:310
17920991023,13cyclictest0-21swapper/000:08:310
17920991022,32cyclictest15168-21/usr/sbin/munin23:28:190
17920991014,39cyclictest28238-21sendmail-msp19:32:420
17920991013,32cyclictest1078-21/usr/sbin/munin19:48:160
17920991013,31cyclictest20823-21sendmail_mailst21:48:160
17920991013,30cyclictest352-21runrttasks22:47:350
179209910110,11cyclictest0-21swapper/021:12:060
179209910110,11cyclictest0-21swapper/021:12:060
17920991004,31cyclictest13281-21/usr/sbin/munin00:18:030
17920991004,31cyclictest13281-21/usr/sbin/munin00:18:030
17920991003,40cyclictest26717-21latency_hist19:27:440
17920991003,32cyclictest12561-21taskset23:23:040
1792099994,28cyclictest352-21runrttasks21:34:520
1792099992,39cyclictest24247-21/usr/sbin/munin22:48:140
17920999847,45cyclictest25456-21ssh21:03:000
1792099984,39cyclictest6390-21ntp_states22:18:130
1792099984,30cyclictest14115-21/usr/sbin/munin21:38:410
1792099983,46cyclictest2525-21ssh22:12:430
1792099983,36cyclictest30322-21/usr/sbin/munin23:53:020
1792099983,31cyclictest32201-21cron23:02:400
1792099983,31cyclictest32201-21cron23:02:400
1792099982,31cyclictest2935-21ls21:18:180
1792099982,24cyclictest17289-21ssh21:43:000
17930999767,19cyclictest26479-21latency_hist22:52:441
1792099973,25cyclictest8492-21/usr/sbin/munin21:28:100
1792099964,33cyclictest6106-21cpu23:12:580
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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