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2026-05-07 - 09:15
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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 rackbslot7.osadl.org (updated Thu May 07, 2026 00:44:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
27069211812,73sleep027095-21idleruntime-cro19:01:420
272209911045,58cyclictest0-21swapper/000:26:520
2660621060,6sleep20-21swapper/222:37:092
27233999681,8cyclictest0-21swapper/223:51:462
268872956,15sleep20-21swapper/218:59:192
27220999478,10cyclictest5060-21/usr/sbin/munin19:32:130
27220999248,30cyclictest20249-21apt-get23:21:520
27220999174,11cyclictest298-21in:imuxsock00:06:400
27220999152,31cyclictest2820-21apt-get23:46:520
27220999137,42cyclictest0-21swapper/019:11:560
27220999137,42cyclictest0-21swapper/019:11:560
27220999050,28cyclictest2334-21apt-get21:56:510
27220999038,40cyclictest23632-21grep00:21:430
2723399893,61cyclictest20847-21apt-get00:16:572
27220998938,22cyclictest14368-21/usr/sbin/munin22:17:000
27225998869,11cyclictest0-21swapper/122:47:091
27233998762,19cyclictest26841-21cpuspeed00:26:562
27220998751,28cyclictest0-21swapper/023:31:530
27220998751,28cyclictest0-21swapper/023:31:530
27225998664,14cyclictest29262-21fschecks_time22:42:021
27225998664,11cyclictest0-21swapper/121:57:181
27225998663,13cyclictest0-21swapper/120:46:441
27220998664,16cyclictest544-21cron21:46:410
27220998633,25cyclictest13645-21ssh22:16:040
27225998569,9cyclictest0-21swapper/122:36:441
27225998569,9cyclictest0-21swapper/122:36:441
27225998567,11cyclictest0-21swapper/100:27:171
27220998568,10cyclictest0-21swapper/020:42:180
27220998553,22cyclictest23086-21ssh22:31:520
27220998553,22cyclictest23086-21ssh22:31:520
27220998547,22cyclictest32690-21apt-get19:16:530
27220998537,20cyclictest30013-21open_inodes23:37:120
27220998536,38cyclictest22942-21latency_hist22:31:440
27225998468,11cyclictest0-21swapper/122:07:101
27225998464,14cyclictest14044-21mailstats19:57:161
27225998464,14cyclictest14044-21mailstats19:57:161
27225998463,11cyclictest0-21swapper/120:12:031
27220998465,10cyclictest11771-21apt-get19:51:510
27220998463,12cyclictest0-21swapper/022:22:030
27220998463,12cyclictest0-21swapper/022:22:030
27220998448,21cyclictest2477-21apt-get22:51:520
27220998448,21cyclictest2477-21apt-get22:51:520
27220998443,31cyclictest29185-21ssh22:42:000
27225998368,8cyclictest0-21swapper/120:32:041
27225998363,11cyclictest0-21swapper/119:27:161
27220998347,31cyclictest0-21swapper/021:16:530
27220998347,31cyclictest0-21swapper/021:16:530
27220998347,21cyclictest10138-21apt-get19:46:520
27220998337,38cyclictest23851-21grep00:21:560
27220998336,22cyclictest8563-21fschecks_time22:07:040
27225998262,14cyclictest1669-21diskmemload22:12:161
27225998262,13cyclictest2374-21systemd-journal23:39:341
27225998260,11cyclictest0-21swapper/119:01:531
27225998248,20cyclictest0-21swapper/123:27:021
27220998262,9cyclictest26304-21apt-get20:36:520
27220998248,23cyclictest18244-21apt-get20:11:520
27220998242,31cyclictest0-21swapper/022:46:570
27220998236,30cyclictest4204-21ssh21:05:250
27220998233,25cyclictest24867-21kworker/u17:0+rpciod22:36:550
27220998231,43cyclictest0-21swapper/020:27:150
27233998161,13cyclictest0-21swapper/220:21:412
27225998166,8cyclictest0-21swapper/122:56:441
27225998166,8cyclictest0-21swapper/122:56:441
27225998157,16cyclictest0-21swapper/123:12:151
27225998157,16cyclictest0-21swapper/123:12:151
27220998168,7cyclictest0-21swapper/023:02:160
27220998147,24cyclictest11356-21apt-get23:06:520
27220998137,35cyclictest23465-21ssh23:26:560
27220998135,35cyclictest2170-21ssh21:56:440
27220998134,38cyclictest8482-21ssh21:12:070
27225998066,8cyclictest0-21swapper/120:02:091
27225998066,8cyclictest0-21swapper/120:02:091
27225998062,11cyclictest0-21swapper/123:06:591
27225998062,11cyclictest0-21swapper/120:46:581
27225998057,15cyclictest23548-21ntp_kernel_err20:27:101
27220998050,20cyclictest4975-21apt-get21:06:530
27220998048,26cyclictest0-21swapper/021:36:560
27220998046,23cyclictest29527-21apt-get20:46:520
27220998033,40cyclictest14855-21df00:06:590
27233997922,23cyclictest20939-21awk21:32:182
27233997922,23cyclictest20939-21awk21:32:182
27225997965,10cyclictest27209-21cyclictest00:06:571
27225997964,8cyclictest0-21swapper/119:32:071
27225997962,13cyclictest25735-21kworker/u17:2+events_unbound21:21:411
27225997962,13cyclictest25735-21kworker/u17:2+events_unbound21:21:411
27225997962,10cyclictest0-21swapper/122:27:171
27225997961,13cyclictest20650-21apt-key00:16:461
27225997934,38cyclictest0-21swapper/123:16:551
27220997959,11cyclictest0-21swapper/023:52:140
27220997959,11cyclictest0-21swapper/023:52:140
27220997949,20cyclictest8758-21apt-get23:56:500
27220997940,29cyclictest1208-21grep20:57:180
27220997935,35cyclictest20344-21ssh21:32:060
27220997935,35cyclictest20344-21ssh21:32:060
27220997934,38cyclictest6445-21unixbench_multi22:57:180
27233997848,22cyclictest18075-21latency_hist20:11:442
27225997864,8cyclictest0-21swapper/120:21:571
27225997864,8cyclictest0-21swapper/120:21:571
27225997861,10cyclictest6854-21fschecks_count19:37:021
27220997859,10cyclictest0-21swapper/019:41:450
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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