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2023-01-29 - 16:33

x86 Intel N455 @1660 MHz, Linux 5.15.49-rt47 (Profile)

Latency plot of system in rack #3, slot #6
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 rack3slot6 (updated Sun Jan 29, 2023 12:45:08)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
27087210116,38sleep00-21swapper/007:08:170
27087210116,38sleep00-21swapper/007:08:170
26928210123,66sleep10-21swapper/107:06:321
26928210123,66sleep10-21swapper/107:06:321
27502999742,12cyclictest14-21ksoftirqd/012:35:190
27502998438,30cyclictest14-21ksoftirqd/008:31:010
27502998338,17cyclictest14-21ksoftirqd/011:00:200
2750399788,16cyclictest6342-21apt-get12:25:231
27503997858,13cyclictest26-21ksoftirqd/110:45:181
27502997833,17cyclictest14-21ksoftirqd/008:40:400
27503997631,38cyclictest26-21ksoftirqd/107:39:121
27502997637,31cyclictest14-21ksoftirqd/007:50:010
27503997555,13cyclictest26-21ksoftirqd/107:55:201
2750299756,60cyclictest4400-21apt-get09:10:190
27502997535,18cyclictest14-21ksoftirqd/007:50:150
2750299747,58cyclictest18049-21apt-get08:15:170
2750299746,58cyclictest2952-21apt-get12:15:180
2750299746,58cyclictest2952-21apt-get12:15:180
2750299745,22cyclictest27004-21apt-get11:50:190
27502997436,32cyclictest14-21ksoftirqd/008:30:020
27502997434,19cyclictest14-21ksoftirqd/008:35:310
27502997429,39cyclictest14-21ksoftirqd/011:33:430
2750299738,19cyclictest0-21swapper/009:55:190
27502997336,30cyclictest14-21ksoftirqd/010:40:400
27502997238,28cyclictest14-21ksoftirqd/009:50:050
27502997237,29cyclictest14-21ksoftirqd/010:48:570
27502997235,9cyclictest14-21ksoftirqd/008:05:200
27502997234,17cyclictest14-21ksoftirqd/010:55:150
27503997133,14cyclictest26-21ksoftirqd/108:30:011
2750299715,57cyclictest2653-21apt-get09:05:170
2750299715,57cyclictest23677-21apt-get11:40:180
2750299714,59cyclictest14733-21apt-get09:40:150
27502997136,29cyclictest14-21ksoftirqd/007:27:500
2750299707,57cyclictest0-21swapper/008:10:160
2750299706,54cyclictest1009-21apt-get09:00:170
2750299706,16cyclictest0-21swapper/010:15:160
27502997037,27cyclictest14-21ksoftirqd/011:58:000
27502997030,34cyclictest14-21ksoftirqd/012:00:310
27502997029,16cyclictest14-21ksoftirqd/011:25:000
27503996946,8cyclictest26-21ksoftirqd/111:20:331
2750299694,56cyclictest6342-21apt-get12:25:210
27502996941,22cyclictest29394-21snmpd08:50:360
27502996938,25cyclictest14-21ksoftirqd/012:05:340
27502996938,24cyclictest14-21ksoftirqd/011:10:300
27502996938,24cyclictest14-21ksoftirqd/010:50:340
27502996937,18cyclictest14-21ksoftirqd/010:00:270
27502996933,30cyclictest14-21ksoftirqd/010:32:500
27502996929,15cyclictest14-21ksoftirqd/008:25:000
2750299687,54cyclictest6324-21apt-get09:15:150
27502996837,26cyclictest14-21ksoftirqd/007:40:250
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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