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2026-04-30 - 14:22
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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 Apr 30, 2026 00:44:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
19907211316,60sleep219932-21munin-run19:02:102
20061991045,81cyclictest27108-21apt-get23:02:271
200569910435,31cyclictest19815-21ssh23:52:230
20066991033,43cyclictest7054-21ssh21:22:212
200569910125,32cyclictest7040-21apt-get21:22:200
20056999911,43cyclictest16840-21chrt23:45:330
20056999872,16cyclictest30268-21latency_hist19:32:120
20056999826,26cyclictest0-21swapper/023:32:200
20056999814,48cyclictest352-21runrttasks22:41:070
199812978,64sleep1277-21dbus-daemon19:02:131
2005699963,69cyclictest19501-21ssh23:52:090
20056999634,42cyclictest0-21swapper/022:10:180
20061999567,19cyclictest352-21runrttasks22:12:101
20066999434,50cyclictest0-21swapper/220:22:112
20066999344,41cyclictest0-21swapper/222:32:382
20066999344,41cyclictest0-21swapper/222:32:382
20061999372,13cyclictest9422-21apt23:32:091
20061999372,13cyclictest9422-21apt23:32:091
20056999370,17cyclictest23769-21/usr/sbin/munin21:52:110
2006699923,34cyclictest17036-21fschecks_count22:42:302
2006699922,36cyclictest25121-21fschecks_time00:02:302
2006699922,33cyclictest30153-21latency_hist19:32:112
20061999252,12cyclictest181rcu_preempt00:14:261
20066999139,44cyclictest0-21swapper/221:03:182
20066999139,44cyclictest0-21swapper/221:03:182
2006699913,36cyclictest17906-21latency20:32:362
2006699913,34cyclictest5301-21ntp_kernel_pll_23:22:382
2006699913,33cyclictest29658-21ssh00:12:112
2006699913,33cyclictest29658-21ssh00:12:112
20056999119,32cyclictest15610-21cron20:27:090
20056999119,32cyclictest15610-21cron20:27:090
2006699903,33cyclictest23008-21grep19:07:462
2006699903,33cyclictest16511-21find20:27:442
2006699903,31cyclictest11042-21grep21:27:462
2006699893,33cyclictest12350-21latency_hist20:17:132
2006699893,32cyclictest14320-21taskset23:41:512
2006699884,28cyclictest22532-21latency_hist23:57:102
20066998840,40cyclictest0-21swapper/223:32:102
20066998840,40cyclictest0-21swapper/223:32:102
2006699883,34cyclictest23808-21latency_hist20:52:122
2006699883,33cyclictest5206-21timerwakeupswit19:52:452
2006699883,33cyclictest5206-21timerwakeupswit19:52:452
2006699883,32cyclictest20487-21cut19:02:312
2006699882,34cyclictest21642-21unixbench_multi20:42:462
2006699882,34cyclictest20070-21unixbench_multi21:42:472
2006699882,34cyclictest20070-21unixbench_multi21:42:472
2006699874,29cyclictest31870-21latency_hist19:37:122
2006699873,36cyclictest4517-21latency_hist23:22:112
2006699873,34cyclictest30834-21taskset23:09:272
2006699873,34cyclictest30702-21fschecks_count21:07:292
2006699873,34cyclictest16387-21idleruntime21:37:332
2006699873,33cyclictest2015-21grep19:42:442
2006699873,32cyclictest7121-21cron00:32:082
2006699873,32cyclictest6173-21fschecks_count19:57:312
2006699873,32cyclictest26173-21proc_pri20:57:432
2006699873,30cyclictest4042-21/usr/sbin/munin21:17:432
2006699872,37cyclictest23970-21/usr/sbin/munin20:52:412
2006699872,36cyclictest26953-21diskmemload22:17:542
2006699872,34cyclictest26447-21unixbench_multi19:17:462
2006699872,34cyclictest26447-21unixbench_multi19:17:462
2006699872,33cyclictest29990-21latency_hist23:07:132
20061998762,9cyclictest181rcu_preempt00:01:111
20061998759,11cyclictest181rcu_preempt20:57:131
20056998753,24cyclictest7390-21latency_hist00:32:120
2006699864,32cyclictest9171-21/usr/sbin/munin20:07:242
2006699864,31cyclictest352-21runrttasks21:32:242
2006699864,29cyclictest7859-21/usr/sbin/munin22:22:472
2006699863,36cyclictest7653-21ls20:02:272
2006699863,34cyclictest2988-21tune2fs19:47:312
20066998633,44cyclictest0-21swapper/223:42:452
2006699863,32cyclictest20085-21grep20:37:462
2006699863,23cyclictest30590-21find00:12:422
2006699862,36cyclictest30100-21wc22:02:452
2006699862,33cyclictest988-21latency_hist19:42:122
2005699869,66cyclictest27108-21apt-get23:02:330
20056998659,21cyclictest26902-21apt-key23:02:130
20056998616,34cyclictest14478-21munin-run22:37:090
20056998616,34cyclictest14478-21munin-run22:37:090
20056998613,51cyclictest352-21runrttasks21:56:030
2007499856,61cyclictest0-21swapper/323:02:273
2006699855,31cyclictest2417-21/usr/sbin/munin00:22:422
2006699855,31cyclictest2417-21/usr/sbin/munin00:22:422
2006699854,34cyclictest25154-21grep21:53:272
2006699853,32cyclictest352-21runrttasks21:51:442
2006699853,32cyclictest1498-21latency_hist22:12:122
2006699853,32cyclictest11550-21latency_hist22:32:112
2006699852,38cyclictest21756-21ssh22:52:132
2006199858,67cyclictest19478-21idleruntime-cro23:52:091
20056998557,19cyclictest19676-21snmpd23:22:110
20056998523,28cyclictest1240-21/usr/sbin/munin21:12:270
20056998523,28cyclictest1240-21/usr/sbin/munin21:12:270
20056998512,36cyclictest352-21runrttasks22:04:380
2006699844,34cyclictest22567-21find22:52:422
2006699844,29cyclictest277-21dbus-daemon22:42:102
2006699844,28cyclictest24552-21mailstats19:12:412
2006699843,33cyclictest9732-21/usr/sbin/munin23:32:372
2006699843,32cyclictest1719-21/usr/sbin/munin22:12:362
2006699843,32cyclictest1664-21cat21:12:382
2006699843,32cyclictest1664-21cat21:12:382
2005699848,36cyclictest19503-21ssh21:42:360
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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