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2023-02-06 - 14:06

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 Mon Feb 06, 2023 00:45:05)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
26486002298190,29sleep10-21swapper/119:08:181
26486172243201,27sleep00-21swapper/019:08:300
281140821080,1chrt2811405-21ssh23:45:030
27981142710,5sleep0161rcuc/023:26:030
28363512590,4sleep0161rcuc/000:20:170
27234142570,4sleep10-21swapper/121:44:321
159199550,4rtkit-daemon1590-21rtkit-daemon20:34:391
159199550,4rtkit-daemon1590-21rtkit-daemon19:56:190
159199530,4rtkit-daemon1590-21rtkit-daemon23:42:250
159199530,3rtkit-daemon1590-21rtkit-daemon23:19:561
28220322520,5sleep10-21swapper/123:59:441
28011292520,5sleep013-21ksoftirqd/023:30:280
2648896995218,16cyclictest2794683-21ssh23:21:250
159199520,4rtkit-daemon1590-21rtkit-daemon00:07:290
159199520,3rtkit-daemon1590-21rtkit-daemon22:00:071
159199510,3rtkit-daemon1590-21rtkit-daemon23:29:531
159199510,3rtkit-daemon0-21swapper/121:25:351
159199510,2rtkit-daemon1590-21rtkit-daemon22:25:340
159199500,3rtkit-daemon1590-21rtkit-daemon19:19:331
159199490,9rtkit-daemon2775645-21/usr/sbin/munin22:55:320
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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