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2022-07-05 - 02:13

x86 Intel Celeron G3900 @2800 MHz, Linux 5.10.35-rt39 (Profile)

Latency plot of system in rack #c, slot #5
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 50 highest latencies:
System rackcslot5.osadl.org (updated Mon Jul 04, 2022 12:43:38)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
263399290,28cyclictest28259-21meminfo09:35:181
263399260,25cyclictest19695-21meminfo07:50:161
263399250,24cyclictest19950-21meminfo12:00:361
263399240,23cyclictest17309-21meminfo10:30:331
263399240,23cyclictest12142-21meminfo11:40:171
263399230,23cyclictest2986-21meminfo08:30:171
263299230,22cyclictest25734-21meminfo12:15:170
263299230,22cyclictest21749-21meminfo07:55:160
263299230,22cyclictest17962-21meminfo11:55:170
263399210,20cyclictest31481-21meminfo08:20:161
263299200,20cyclictest2395-21meminfo11:15:190
263299200,19cyclictest19238-21meminfo10:35:250
263299190,19cyclictest20479-21meminfo09:15:170
263299190,19cyclictest1712-21meminfo09:50:180
263399180,18cyclictest23124-21meminfo10:45:191
263399180,17cyclictest27581-21meminfo08:10:161
263399170,17cyclictest3307-21meminfo07:10:181
263399170,17cyclictest27000-21meminfo10:55:181
263299170,17cyclictest23707-21meminfo08:00:150
263299170,17cyclictest11459-21meminfo10:15:270
263399163,3cyclictest0-21swapper/108:55:151
263399160,15cyclictest6880-21meminfo08:40:161
263299160,16cyclictest9552-21meminfo10:10:470
263299160,16cyclictest5859-21meminfo07:15:160
263399152,5cyclictest5619-21latency_hist11:25:011
263399150,14cyclictest13404-21meminfo10:20:181
263299150,14cyclictest18542-21meminfo09:10:190
263399144,3cyclictest1018-21apt-get09:50:121
263399143,7cyclictest6939-21seq07:19:361
263399141,1cyclictest10107-21apt-get08:50:111
263299147,4cyclictest24941-21sleep12:14:590
263299142,5cyclictest0-21swapper/008:08:430
263299141,7cyclictest0-21swapper/009:55:230
263299140,5cyclictest18577-21updatedb.mlocat07:51:230
263399136,2cyclictest32234-21grep12:30:231
263399132,6cyclictest0-21swapper/110:50:371
263399132,4cyclictest1734-21apt-get11:15:131
263399131,10cyclictest25172-21taskset09:26:331
263399130,3cyclictest21126-21grep09:15:221
263399130,12cyclictest29634-21meminfo12:25:161
263299134,3cyclictest9478-21latency_hist11:35:000
263299133,6cyclictest0-21swapper/008:20:120
263299133,3cyclictest0-21swapper/009:30:150
263299132,4cyclictest12950-21/usr/sbin/munin08:55:180
263299131,6cyclictest0-21swapper/012:32:140
263299131,11cyclictest20537-21apt-esm-hook10:40:120
263299130,13cyclictest7560-21meminfo10:05:170
263299130,13cyclictest6881-21meminfo08:40:170
263299130,13cyclictest28956-21meminfo11:00:170
263299130,13cyclictest15648-21meminfo07:40:160
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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