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2026-05-02 - 17:41
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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 Sat May 02, 2026 12:44:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
16809991124,32cyclictest16734-21ntp_kernel_pll_11:32:290
16809991124,32cyclictest16734-21ntp_kernel_pll_11:32:290
16809991113,34cyclictest1561-21apt-get12:02:100
168299911066,37cyclictest544-21cron08:56:592
168299911066,37cyclictest544-21cron08:56:592
168099910949,12cyclictest23899-21runrttasks10:50:210
16809991094,49cyclictest3600-21/usr/sbin/munin09:22:290
16809991094,33cyclictest27482-21idleruntime-cro10:56:590
168219910451,46cyclictest13742-21sh10:32:331
16829991004,77cyclictest32195-21apt-get07:47:122
73162990,8sleep20-21swapper/212:12:022
16809999659,11cyclictest31639-21ssh10:07:390
16809999659,11cyclictest31639-21ssh10:07:390
16829999518,31cyclictest18496-21unixbench_singl08:42:362
16821999549,40cyclictest29503-21threads07:37:351
16821999549,40cyclictest29503-21threads07:37:351
16821999542,44cyclictest0-21swapper/111:57:021
16821999541,47cyclictest16685-21sh10:37:351
16821999539,49cyclictest0-21swapper/108:47:021
16821999341,45cyclictest8865-21sh09:31:031
16821999335,8cyclictest0-21swapper/111:22:231
16829999248,7cyclictest181rcu_preempt08:17:352
16821999243,43cyclictest17058-21timerandwakeup11:32:361
16821999243,43cyclictest17058-21timerandwakeup11:32:361
153642929,58sleep015393-21cpu06:57:190
16821999128,9cyclictest0-21swapper/109:18:111
16821999128,9cyclictest0-21swapper/109:18:111
16821999116,25cyclictest23391-21sh10:48:551
16821999043,42cyclictest0-21swapper/112:32:011
16821999043,42cyclictest0-21swapper/112:32:011
16821999035,8cyclictest0-21swapper/110:02:321
16821999035,10cyclictest0-21swapper/109:15:371
16821999032,8cyclictest0-21swapper/109:47:131
16821999031,8cyclictest0-21swapper/109:57:111
16829998938,44cyclictest0-21swapper/212:17:282
1682999893,28cyclictest1460-21if_eth010:12:232
16829998920,27cyclictest10000-21cut11:22:022
16821998940,42cyclictest0-21swapper/107:27:021
16821998938,42cyclictest0-21swapper/107:42:221
16821998935,8cyclictest0-21swapper/110:42:261
16821998931,8cyclictest0-21swapper/110:22:351
16829998837,43cyclictest0-21swapper/211:41:582
16829998822,30cyclictest22733-21cat10:47:352
16829998813,19cyclictest27675-21kworker/u17:2+xprtiod09:12:362
16821998841,41cyclictest23738-21diskmemload11:29:501
16821998829,8cyclictest0-21swapper/111:02:201
16821998826,21cyclictest17583-21wc07:02:321
16821998826,21cyclictest17583-21wc07:02:321
1682199882,39cyclictest1099-21ssh10:12:131
16821998821,18cyclictest23738-21diskmemload09:37:251
1682999873,29cyclictest3869-21fschecks_count09:22:232
1682999873,25cyclictest1539-21/usr/sbin/munin07:52:212
1682199873,60cyclictest32195-21apt-get07:47:171
16821998730,10cyclictest0-21swapper/112:07:551
16821998729,8cyclictest0-21swapper/108:17:221
16821998728,8cyclictest0-21swapper/108:27:251
16821998728,8cyclictest0-21swapper/108:27:251
16829998637,41cyclictest0-21swapper/212:27:212
16829998637,41cyclictest0-21swapper/212:27:212
1682999863,35cyclictest8428-21taskset10:23:312
1682999863,24cyclictest13908-21/usr/sbin/munin11:27:332
16829998629,44cyclictest0-21swapper/211:44:062
1682999862,27cyclictest5437-21ls08:02:362
1682999862,27cyclictest5437-21ls08:02:362
16829998620,17cyclictest0-21swapper/212:02:152
16829998617,27cyclictest5421-21seq10:18:242
16829998617,27cyclictest5421-21seq10:18:242
16821998634,11cyclictest0-21swapper/107:27:371
16821998633,9cyclictest0-21swapper/111:17:221
16821998631,10cyclictest0-21swapper/111:10:391
16829998536,43cyclictest29750-21sendmail09:12:002
16829998536,43cyclictest29750-21sendmail09:12:002
1682999853,30cyclictest13185-21/usr/sbin/munin09:37:322
1682999853,22cyclictest623-21apt-get09:17:162
1682999853,22cyclictest623-21apt-get09:17:162
16829998526,50cyclictest30629-21cpuspeed10:07:172
16829998526,50cyclictest30629-21cpuspeed10:07:172
16829998525,52cyclictest0-21swapper/209:57:152
16829998522,6cyclictest0-21swapper/211:02:102
16821998568,8cyclictest0-21swapper/107:52:161
16821998539,10cyclictest16798-21cyclictest10:53:591
1682199853,33cyclictest4120-21cpu10:17:171
1682199853,33cyclictest4120-21cpu10:17:171
1682199853,32cyclictest3600-21/usr/sbin/munin09:22:281
1682199853,31cyclictest23106-21tail11:42:361
16821998519,20cyclictest3872-21cat07:57:391
16821998519,20cyclictest3872-21cat07:57:391
16829998437,39cyclictest0-21swapper/212:22:182
16829998437,39cyclictest0-21swapper/212:22:182
16829998437,39cyclictest0-21swapper/210:37:352
1682999843,29cyclictest31306-21sort11:57:212
1682999843,27cyclictest12409-21idleruntime-cro08:26:592
1682999843,26cyclictest27249-21ls07:32:182
16829998423,50cyclictest0-21swapper/208:52:032
1682999842,28cyclictest9202-21awk08:16:592
16821998463,14cyclictest0-21swapper/110:07:261
16821998463,14cyclictest0-21swapper/110:07:261
1682199843,30cyclictest22590-21timerwakeupswit09:52:351
1682199843,30cyclictest22590-21timerwakeupswit09:52:351
16821998431,8cyclictest0-21swapper/109:02:161
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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