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2023-06-06 - 18:32

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 Tue Jun 06, 2023 12:44:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
4899802359284,29sleep10-21swapper/107:07:241
4901472325283,28sleep00-21swapper/007:09:100
49035899190184,4cyclictest529066-21kworker/u8:108:54:561
6049152540,4sleep0604253-21/usr/sbin/munin11:50:260
490354995316,6cyclictest13-21ksoftirqd/010:55:190
159199490,3rtkit-daemon1590-21rtkit-daemon08:27:100
159199480,3rtkit-daemon1590-21rtkit-daemon07:27:490
159199460,4rtkit-daemon1590-21rtkit-daemon10:23:521
159199460,4rtkit-daemon1590-21rtkit-daemon09:52:511
49035499454,3cyclictest13-21ksoftirqd/012:00:010
490354994523,13cyclictest591531-21gpgv11:20:010
49035499445,6cyclictest13-21ksoftirqd/012:10:260
159199440,3rtkit-daemon1590-21rtkit-daemon09:43:001
49035499436,7cyclictest13-21ksoftirqd/011:00:230
49035499436,6cyclictest13-21ksoftirqd/010:10:210
490354994310,6cyclictest13-21ksoftirqd/010:50:260
159199430,7rtkit-daemon0-21swapper/010:35:031
49035499424,6cyclictest13-21ksoftirqd/011:25:200
49035499415,7cyclictest13-21ksoftirqd/010:00:130
49035499415,7cyclictest13-21ksoftirqd/010:00:120
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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