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2022-05-26 - 19:51

x86 Intel Celeron N3350 @1100 MHz, Linux 5.10.90-rt60 (Profile)

Latency plot of system in rack #c, slot #4
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 -h400 -q
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 rackcslot4.osadl.org (updated Fri May 20, 2022 00:44:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
16545802322281,26sleep10-21swapper/119:06:151
16547242296254,27sleep00-21swapper/019:07:470
172099630,4rtkit-daemon1719-21rtkit-daemon19:14:230
16742122590,14sleep013-21ksoftirqd/019:55:100
172099520,4rtkit-daemon1719-21rtkit-daemon21:57:291
172099500,4rtkit-daemon1719-21rtkit-daemon23:47:441
172099490,3rtkit-daemon1719-21rtkit-daemon22:53:301
17720722480,4sleep10-21swapper/122:49:111
172099470,3rtkit-daemon1719-21rtkit-daemon21:42:361
172099450,4rtkit-daemon1719-21rtkit-daemon20:16:550
17120272440,1chrt1712025-21grep21:20:201
17267482420,1sleep00-21swapper/021:41:160
172099390,3rtkit-daemon0-21swapper/121:37:221
165504399384,10cyclictest26-21ksoftirqd/119:35:011
172099370,4rtkit-daemon1719-21rtkit-daemon20:10:191
172099370,3rtkit-daemon1719-21rtkit-daemon00:25:151
172099370,3rtkit-daemon0-21swapper/021:17:461
165504399376,10cyclictest26-21ksoftirqd/123:00:141
172099360,3rtkit-daemon1719-21rtkit-daemon21:24:050
172099360,3rtkit-daemon0-21swapper/021:13:211
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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