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2022-05-28 - 15:51

x86 Intel Celeron G3900 @2800 MHz, Linux 4.16.15-rt7 (Profile)

Latency plot of system in rack #c, slot #2
Data to construct the above plot have been generated using the RT test utility cyclictest.
Unexpectedly long latencies may be caused by SMIs
Command line: cyclictest -l100000000 -m -Sp99 -i200 -h200 -q
Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Characteristics of the 20 highest latencies:
System rackcslot2.osadl.org (updated Sat May 28, 2022 12:43:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1294827254,13sleep10-21swapper/107:08:441
155272700,1sleep015502-21apt-get09:19:290
1298226856,8sleep00-21swapper/007:09:050
13204991810,7cyclictest5138-21ssh11:12:370
13205991716,1cyclictest9931-21ssh11:22:181
13205991716,1cyclictest4174-21ssh12:18:391
13204991716,1cyclictest29275-21ssh10:55:030
13204991715,1cyclictest7-21ksoftirqd/012:04:290
2412421610,4sleep091rcu_preempt11:52:350
13205991616,0cyclictest15175-21ssh11:33:371
13205991615,1cyclictest6271-21ssh10:07:201
13205991615,1cyclictest21696-21ssh10:39:221
13205991615,1cyclictest1522-21ls07:59:501
13204991616,0cyclictest0-21swapper/007:57:290
13204991615,1cyclictest6674-21ssh12:23:510
13204991615,1cyclictest10031-21ssh10:14:510
13204991610,6cyclictest0-21swapper/011:43:130
13204991610,6cyclictest0-21swapper/007:20:560
13205991515,0cyclictest0-21swapper/112:26:331
13205991515,0cyclictest0-21swapper/109:51:021
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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