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2023-10-03 - 22:54
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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 rackbslot7 (updated Tue Oct 03, 2023 12:44:19)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
19101213120,79sleep30-21swapper/307:02:203
20392991024,19cyclictest20396-21latency_hist07:06:520
1622321020,4chrt16222-21ssh12:25:261
302882980,10sleep3391rcuc/311:54:503
2039299953,20cyclictest24795-21/usr/sbin/munin10:52:240
20403999456,14cyclictest141rcu_preempt08:22:461
2039299943,14cyclictest31431-21ssh10:07:290
2039299943,14cyclictest31431-21ssh10:07:290
53232930,4chrt5325-21grep09:22:200
2039299932,17cyclictest7621-21/usr/sbin/munin09:27:180
2039299923,15cyclictest12962-21/usr/sbin/munin11:27:150
20392999223,58cyclictest0-21swapper/008:57:170
1981129119,34sleep20-21swapper/207:02:402
2039299904,13cyclictest6691-21apt-get10:22:120
2039299904,13cyclictest6691-21apt-get10:22:120
2039299903,17cyclictest31261-21latency_hist09:11:500
2039299902,14cyclictest19733-21modprobe12:31:460
20409998926,54cyclictest7291-21idleruntime-cro09:26:472
20392998925,54cyclictest27660-21ssh10:57:320
20392998925,54cyclictest27660-21ssh10:57:320
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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