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2023-05-28 - 14:45

x86 Intel Core i9-9900K @3600 MHz, Linux 5.15.49-rt47 (Profile)

Latency plot of system in rack #0, slot #7
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 rack0slot7.osadl.org (updated Sun May 28, 2023 00:45:41)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
504145215989,56sleep140-21swapper/1419:05:096
8325201430,133pipewire0-21swapper/219:06:128
8321201410,130pipewire-pulse0-21swapper/1319:05:165
8325201390,128pipewire0-21swapper/419:08:1110
8321201360,127pipewire-pulse0-21swapper/019:06:560
9525101350,125AudioIP~ackRPC0-2111:22:1115
5205899912218,62cyclictest966057-21chrt21:17:409
8321201200,115pipewire-pulse0-21swapper/819:07:2214
5205899912037,62cyclictest1155073-21/usr/sbin/munin22:05:329
5199752120116,2sleep50-21swapper/519:07:2311
5041422119115,2sleep110-21swapper/1119:05:053
8325201180,106pipewire0-21swapper/319:05:339
9525101160,114AudioIP~ackRPC0-2111:22:111
8325201160,112pipewire0-21swapper/1219:08:394
5205899910543,41cyclictest0-21swapper/320:54:129
5205899910420,42cyclictest39-21ksoftirqd/321:11:409
9525101030,95AudioIP~ackRPC0-2111:22:112
52058999963,44cyclictest0-21swapper/319:53:509
520589999526,40cyclictest1292592-21/usr/sbin/munin22:45:359
520589999126,24cyclictest0-21swapper/322:36:449
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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