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2026-04-22 - 23:02
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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 Wed Apr 22, 2026 12:44:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
173529913763,18cyclictest3225-21latency_hist12:02:420
173529913763,18cyclictest3225-21latency_hist12:02:420
15873210819,46sleep00-21swapper/006:57:540
17361991003,47cyclictest3482-21ssh12:02:541
1694721008,18sleep20-21swapper/206:59:322
17371999927,42cyclictest0-21swapper/212:04:062
17361999652,39cyclictest17339-21cyclictest08:18:161
1737199953,54cyclictest467-21runrttasks09:15:132
1736199952,46cyclictest8977-21ssh11:17:501
1736199952,46cyclictest8977-21ssh11:17:501
17371999248,38cyclictest544-21cron07:57:402
17371999248,38cyclictest544-21cron07:57:402
17371999069,13cyclictest18163-21ssh12:27:412
17361999050,35cyclictest17339-21cyclictest09:13:161
17352999068,15cyclictest29128-21latency_hist10:57:420
17371998949,30cyclictest0-21swapper/210:28:082
17371998949,30cyclictest0-21swapper/210:28:082
17371998945,38cyclictest7947-21cstates09:27:572
17361998969,11cyclictest365-21ntpd11:08:161
17361998946,37cyclictest0-21swapper/107:17:431
17371998763,15cyclictest15433-21sh11:28:072
1737199874,64cyclictest0-21swapper/209:32:582
1736199879,39cyclictest4547-21modprobe09:22:391
1736199875,41cyclictest530-21ssh10:08:181
17361998748,33cyclictest4844-21/usr/sbin/munin09:23:091
17352998764,17cyclictest16756-21latency_hist09:42:420
17352998764,17cyclictest16756-21latency_hist09:42:420
17371998658,22cyclictest24710-21diskmemload10:03:232
17371998658,22cyclictest24710-21diskmemload10:03:232
1736199863,35cyclictest7917-21grep08:08:161
1736199863,34cyclictest32601-21modprobe11:57:381
1736199863,24cyclictest21753-21runrttasks08:52:521
17371998545,33cyclictest7474-21ntp_offset08:08:082
17371998545,33cyclictest24710-21diskmemload10:10:502
17361998544,35cyclictest27356-21sh11:48:051
17361998544,35cyclictest27356-21sh11:48:051
17361998542,36cyclictest24710-21diskmemload11:58:051
17361998542,36cyclictest24710-21diskmemload11:58:051
1736199853,39cyclictest352-21runrttasks12:07:591
1736199853,36cyclictest31302-21taskset07:42:591
1736199853,35cyclictest20136-21grep10:42:421
1736199853,25cyclictest23952-21/usr/sbin/munin11:43:171
17361998528,52cyclictest0-21swapper/110:17:421
17371998445,33cyclictest23858-21ntp_kernel_pll_08:58:072
17371998438,40cyclictest0-21swapper/210:17:422
17361998456,19cyclictest10801-21apt-key09:32:441
1736199843,30cyclictest24355-21unixbench_singl10:48:161
1736199843,29cyclictest29659-21/usr/sbin/munin10:58:021
1736199842,37cyclictest25006-21/usr/sbin/munin09:03:071
1736199842,35cyclictest20454-21grep07:08:181
17352998464,14cyclictest2539-21latency_hist11:07:420
17352998464,14cyclictest2539-21latency_hist11:07:420
17352998464,13cyclictest24869-21sh09:02:430
17352998463,15cyclictest24710-21diskmemload09:17:410
17371998358,16cyclictest19546-21/usr/sbin/munin07:08:192
17371998343,34cyclictest24710-21diskmemload10:27:022
1736199836,31cyclictest29154-21ssh10:03:001
1736199836,31cyclictest29154-21ssh10:03:001
17361998343,9cyclictest0-21swapper/111:13:541
1736199834,32cyclictest12252-21grep11:23:021
1736199833,37cyclictest28258-21apt-get09:07:511
1736199833,34cyclictest11781-21ssh09:33:271
1736199833,24cyclictest17363-21latency_hist07:02:441
1736199832,35cyclictest13878-21ssh10:32:161
1736199832,35cyclictest13878-21ssh10:32:161
1736199832,33cyclictest20403-21latency09:48:051
1736199832,30cyclictest20363-21ssh12:30:491
1736199832,30cyclictest20363-21ssh12:30:491
17352998366,10cyclictest22547-21apt-get07:18:010
1735299834,56cyclictest12390-21/usr/sbin/munin12:18:130
1735299834,56cyclictest12390-21/usr/sbin/munin12:18:130
17371998258,19cyclictest17339-21cyclictest09:38:122
17371998258,19cyclictest17339-21cyclictest09:38:122
1736199823,36cyclictest6729-21latency_hist08:07:411
1736199823,36cyclictest6729-21latency_hist08:07:411
1736199823,33cyclictest9399-21/usr/sbin/munin12:13:161
1736199823,33cyclictest13974-21/usr/sbin/munin09:38:011
1736199823,33cyclictest13974-21/usr/sbin/munin09:38:011
1736199822,34cyclictest20571-21apt-get11:37:391
17352998251,14cyclictest18552-21ssh12:27:570
17352998251,14cyclictest18552-21ssh12:27:570
1737199812,44cyclictest19023-21grep08:43:142
1737199812,44cyclictest19023-21grep08:43:142
1736199814,8cyclictest0-21swapper/108:37:531
17361998137,37cyclictest0-21swapper/111:39:411
1736199813,36cyclictest9400-21tail10:23:161
1736199813,35cyclictest27601-21modprobe07:32:391
1736199813,35cyclictest27601-21modprobe07:32:391
1736199813,35cyclictest13200-21/usr/sbin/munin12:18:141
1736199813,35cyclictest13200-21/usr/sbin/munin12:18:141
1736199813,34cyclictest9552-21grep08:13:161
1736199813,34cyclictest13748-21/usr/sbin/munin08:28:031
1736199813,34cyclictest13748-21/usr/sbin/munin08:28:031
1736199813,32cyclictest352-21runrttasks10:18:471
1736199813,31cyclictest29701-21cut07:38:011
1736199813,30cyclictest16428-21latency_hist08:37:411
1736199813,30cyclictest16428-21latency_hist08:37:411
1736199813,26cyclictest28599-21latency_hist10:02:421
17361998114,60cyclictest0-21swapper/110:52:551
17352998164,11cyclictest24710-21diskmemload11:22:020
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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