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2022-07-05 - 02:20

x86 Intel Atom E3845 @1910 MHz, Linux 4.19.37-rt19 (Profile)

Latency plot of system in rack #d, slot #3
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 -Up99 -i200 -h400 --smi -q
Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Characteristics of the 50 highest latencies:
System rackdslot3.osadl.org (updated Mon Mar 07, 2022 12:46:05)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
151521810,8sleep33230499cyclictest11:10:153
1875421590,8sleep03230199cyclictest08:50:190
12829110180,9phc2sys0-21swapper/307:08:493
12829110180,9phc2sys0-21swapper/307:08:493
170812770,7sleep13230299cyclictest10:10:111
3094426944,10sleep20-21swapper/207:05:292
3094426944,10sleep20-21swapper/207:05:292
306512680,3sleep10-21swapper/109:05:191
3230199570,3cyclictest0-21swapper/010:35:190
3230199561,3cyclictest0-21swapper/007:15:170
32302995447,4cyclictest25-21ksoftirqd/107:40:171
32302995346,4cyclictest25-21ksoftirqd/109:10:171
20732530,2sleep30-21swapper/309:10:183
32302995246,3cyclictest25-21ksoftirqd/109:30:171
32302995244,3cyclictest25-21ksoftirqd/108:55:161
32302995144,4cyclictest25-21ksoftirqd/107:30:181
32302995044,4cyclictest25-21ksoftirqd/108:15:181
32302995042,4cyclictest25-21ksoftirqd/108:30:161
32302995042,4cyclictest25-21ksoftirqd/108:30:161
3230499493,38cyclictest5805-21apt-get10:35:183
32303994943,4cyclictest33-21ksoftirqd/212:30:182
3230499482,39cyclictest0-21swapper/308:55:163
3230499472,38cyclictest30181-21apt-get08:25:173
32302994741,3cyclictest25-21ksoftirqd/108:20:211
62952462,4sleep233-21ksoftirqd/210:35:222
3230499462,40cyclictest16063-21grep08:45:383
3230499462,36cyclictest2020-21apt-get12:30:193
3230399462,13cyclictest1849-21chrt11:50:172
3230499451,36cyclictest14133-21apt-get12:05:183
3230499450,4cyclictest20334-21latency_hist11:35:013
3230399453,11cyclictest5381-21sed07:15:172
32302994539,3cyclictest25-21ksoftirqd/109:35:171
32302994531,3cyclictest25-21ksoftirqd/107:25:181
3230199450,3cyclictest121rcu_preempt07:40:180
3170024515,19sleep10-21swapper/107:05:571
3170024515,19sleep10-21swapper/107:05:571
3230499443,33cyclictest30177-21apt-get11:05:183
3230499443,33cyclictest30177-21apt-get11:05:183
3230499441,36cyclictest21835-21apt-get07:35:173
3230399444,9cyclictest0-21swapper/211:30:312
3230399442,13cyclictest1883-21sort10:30:182
32302994438,4cyclictest25-21ksoftirqd/108:50:201
32302994436,4cyclictest25-21ksoftirqd/107:35:161
56698430,3rtkit-daemon565-21rtkit-daemon11:56:061
56698430,3rtkit-daemon565-21rtkit-daemon11:13:581
3230499431,36cyclictest26166-21apt-get09:00:183
32303994324,16cyclictest33-21ksoftirqd/208:37:412
32302994337,3cyclictest25-21ksoftirqd/112:00:211
32302994337,3cyclictest25-21ksoftirqd/108:05:171
3178024313,19sleep00-21swapper/007:06:570
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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