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2024-04-20 - 08:41
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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 20 highest latencies:
System rackeslot6.osadl.org (updated Sat Apr 20, 2024 00:44:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
412366499143131,9cyclictest4125156-21latency_hist19:15:011
412366499127116,8cyclictest36038-21kworker/u8:1+events_unbound00:40:001
412366499124110,10cyclictest2158010-21systemd-journal21:14:351
412366499112100,9cyclictest23312-40mandb00:00:011
412366499112100,9cyclictest23312-40mandb00:00:011
41236619911098,9cyclictest4122055-21kworker/u8:2+flush-179:019:40:230
41236649910591,11cyclictest2158010-21systemd-journal00:05:001
41236649910494,7cyclictest4188289-21latency_hist22:30:011
41236619910495,7cyclictest4157273-21http20:55:010
41236649910396,5cyclictest13465-21latency_hist23:30:011
41236619910386,15cyclictest2158010-21systemd-journal00:04:020
41236619910189,10cyclictest29963-21apt-get00:20:090
4123664999888,7cyclictest4134462-21kworker/u8:0+flush-179:020:45:271
4123661999386,5cyclictest4134462-21kworker/u8:0+flush-179:020:00:140
4123661999182,7cyclictest4173758-21kworker/u8:3+flush-179:021:55:010
4123661999180,8cyclictest11881-21latency_hist23:25:010
4123664999074,14cyclictest4159177-21kworker/u8:0+flush-179:021:00:211
4123661999084,4cyclictest4134462-21kworker/u8:0+flush-179:020:20:150
4123661999084,4cyclictest4134462-21kworker/u8:0+flush-179:020:20:150
4123661998882,4cyclictest4122055-21kworker/u8:2+flush-179:019:35:270
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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