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2024-11-22 - 17:14
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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 20 highest latencies:
System rackeslot6.osadl.org (updated Fri Nov 22, 2024 12:44:53)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
8636329910596,6cyclictest902559-21/usr/sbin/munin09:10:260
8636329910493,9cyclictest924573-21/usr/sbin/munin10:20:240
8636329910492,9cyclictest930708-21latency_hist10:40:010
8636359910288,11cyclictest912144-21latency_hist09:40:011
8636359910287,9cyclictest900716-21kworker/u8:0+flush-179:009:40:221
8636359910086,12cyclictest3105085-21systemd-journal10:20:001
863632999893,3cyclictest900716-21kworker/u8:0+events_unbound09:05:220
863632999590,4cyclictest953288-21kworker/u8:3+events_unbound12:09:560
863632999585,7cyclictest926179-21apt-get10:25:120
863632999585,3cyclictest964383-21kworker/u8:1+events_unbound12:29:560
863635999484,6cyclictest869953-21kworker/u8:2+flush-179:007:40:231
863635999483,8cyclictest954832-21latency_hist11:55:011
863632999379,11cyclictest919549-21apt-get10:05:100
863632999281,8cyclictest946614-21latency_hist11:30:010
863632999280,9cyclictest942068-21/usr/sbin/munin11:15:240
863632999280,9cyclictest922963-21/usr/sbin/munin10:15:230
863632999179,10cyclictest951915-21apt-get11:45:110
863635999083,5cyclictest917410-21kworker/u8:3+flush-179:010:30:261
863635999070,18cyclictest940224-21kworker/u8:0+flush-179:011:15:011
863632998977,9cyclictest964393-21latency_hist12:25:010
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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