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2026-07-23 - 10:38
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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 Jul 23, 2026 00:44:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
22733210510,66sleep222217-21apt-get18:51:492
24211991043,65cyclictest31018-21apt-get22:46:421
24219991013,69cyclictest31588-21apt-get22:46:472
242199910057,37cyclictest0-21swapper/220:57:022
24219991003,35cyclictest6102-21apt-get22:01:372
24223999810,69cyclictest26624-21chrt21:41:443
24219999772,19cyclictest28376-21cpu22:41:432
24211999739,51cyclictest0-21swapper/121:16:321
24211999737,8cyclictest0-21swapper/100:06:411
24211999737,8cyclictest0-21swapper/100:06:411
2314629731,37sleep123216-21latency18:52:551
2421999962,62cyclictest20373-21apt-get21:31:432
2421199963,32cyclictest4587-21cron21:06:271
2421199963,32cyclictest4587-21cron21:06:271
2421199952,35cyclictest1305-21grep19:22:051
2421999943,19cyclictest26128-21/usr/sbin/munin22:37:022
24211999449,38cyclictest1153-21unixbench_multi21:52:041
2421199943,32cyclictest14578-21kernelversion21:21:541
24219999346,40cyclictest10618-21latency_hist21:16:302
2421199935,63cyclictest11178-21apt-get21:16:461
2421199935,63cyclictest11178-21apt-get21:16:461
24211999339,47cyclictest0-21swapper/120:56:311
24211999339,47cyclictest0-21swapper/120:56:311
24211999338,48cyclictest31814-21fschecks_count20:57:211
2421199933,36cyclictest29837-21uniq21:46:491
2421199932,43cyclictest30837-21diskmemload00:23:221
24219999256,24cyclictest14351-21grep23:11:512
24219999238,47cyclictest0-21swapper/221:51:442
24211999236,12cyclictest0-21swapper/123:41:281
24211999234,14cyclictest0-21swapper/100:16:541
24211999234,14cyclictest0-21swapper/100:16:541
2421199923,40cyclictest2989-21wc22:52:021
2421199923,40cyclictest2989-21wc22:52:021
2421199923,37cyclictest19371-21/usr/sbin/munin22:26:481
2421199922,44cyclictest28077-21cpu19:06:441
2421199922,33cyclictest20022-21/usr/sbin/munin23:21:441
2421199914,33cyclictest11498-21latency_hist19:56:301
2421199912,38cyclictest26615-21ssh21:41:421
2421999902,32cyclictest19815-21latency_hist23:21:302
2421999902,32cyclictest19815-21latency_hist23:21:302
2421199906,68cyclictest32334-21ssh23:41:561
2421199906,68cyclictest32334-21ssh23:41:561
2421199903,40cyclictest3109-21/usr/sbin/munin21:56:501
2421199903,38cyclictest26025-21/usr/sbin/munin23:32:011
2421199903,38cyclictest13098-21timerwakeupswit22:12:051
2421199903,35cyclictest11078-21/usr/sbin/munin23:06:531
24211999032,8cyclictest0-21swapper/120:01:491
2421199902,37cyclictest23037-21/usr/sbin/munin23:27:051
2421199902,35cyclictest9798-21pluginstate22:07:001
2421199902,35cyclictest9798-21pluginstate22:07:001
2421199902,35cyclictest19859-21latency_hist23:21:301
2421199902,35cyclictest19859-21latency_hist23:21:301
24202999066,17cyclictest941-21ssh23:43:060
24202999066,17cyclictest941-21ssh23:43:060
24219998958,21cyclictest19522-21idleruntime-cro20:21:272
2421999892,33cyclictest17337-21ntp_kernel_pll_00:11:542
24219998912,26cyclictest24832-21cut20:36:522
24219998912,26cyclictest24832-21cut20:36:522
2421199893,36cyclictest5717-21grep21:07:021
2421199893,34cyclictest6082-21/usr/sbin/munin22:01:551
2421199893,30cyclictest27045-21timerandwakeup20:42:041
2421199893,24cyclictest28129-21fschecks_time20:46:491
2421199892,33cyclictest8282-21taskset23:01:491
24219998838,42cyclictest0-21swapper/221:41:302
2421999883,32cyclictest1910-21/usr/sbin/munin21:01:392
2421999883,32cyclictest1910-21/usr/sbin/munin21:01:392
2421999883,31cyclictest31078-21latency_hist19:16:302
2421999882,34cyclictest11462-21ssh21:17:272
2421999882,34cyclictest11462-21ssh21:17:272
2421199884,34cyclictest17137-21/usr/sbin/munin21:27:051
2421199884,34cyclictest17137-21/usr/sbin/munin21:27:051
2421199883,37cyclictest17149-21cat00:11:491
2421199883,34cyclictest8747-21fschecks_time19:46:491
2421199883,31cyclictest18026-21latency_hist20:16:301
2421199882,35cyclictest30483-21grep19:12:021
2421199882,33cyclictest352-21runrttasks20:31:401
24219998738,41cyclictest0-21swapper/223:22:372
24219998737,42cyclictest30837-21diskmemload23:06:322
2421999873,33cyclictest20033-21grep00:16:492
2421999873,33cyclictest20033-21grep00:16:492
24219998726,53cyclictest0-21swapper/223:41:582
24219998726,53cyclictest0-21swapper/223:41:582
2421999872,34cyclictest3051-21timerwakeupswit22:52:032
2421999872,34cyclictest3051-21timerwakeupswit22:52:032
2421199874,32cyclictest3888-21fschecks_time19:31:511
2421199874,32cyclictest3888-21fschecks_time19:31:511
2421199873,35cyclictest5215-21cstates22:56:441
2421199873,33cyclictest11944-21fschecks_time19:56:501
24211998722,13cyclictest0-21swapper/121:41:311
24211998719,17cyclictest11619-21unixbench_multi00:02:021
2299228711,45sleep023021-21fschecks_time18:52:490
2421999864,33cyclictest17221-21cut20:12:022
2421999863,54cyclictest13287-21apt-get00:06:522
2421999863,54cyclictest13287-21apt-get00:06:522
2421999863,35cyclictest27395-21ssh21:42:512
2421999863,31cyclictest23483-21tr23:26:542
24219998619,20cyclictest12028-21latency_hist22:11:312
24219998619,20cyclictest12028-21latency_hist22:11:312
24211998634,7cyclictest0-21swapper/120:31:301
2421199863,38cyclictest19964-21fschecks_count20:21:501
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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