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2026-04-23 - 01:32
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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 50 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
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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