You are here: Home / Projects / QA Farm Realtime / Latency plots / 
2022-01-26 - 12:13

Intel(R) Atom(TM) CPU E3845 @ 1.91GHz, Linux 4.19.37-rt19 (Profile)

Latency plot of system in rack #d, slot #2
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 rackdslot2.osadl.org (updated Wed Jan 26, 2022 00:46:14)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1684521700,9sleep2946599cyclictest21:15:352
848721640,8sleep2946599cyclictest23:05:312
848721640,8sleep2946599cyclictest23:05:312
8898211392,10sleep20-21swapper/219:06:252
12699110179,9phc2sys0-21swapper/319:08:223
55598760,13rtkit-daemon0-21swapper/019:07:020
91022708,50sleep10-21swapper/119:09:021
195232700,6sleep119528-21cpuspeed22:40:171
152762680,9sleep1946499cyclictest21:55:151
93392660,2sleep10-21swapper/120:30:011
70312660,2sleep20-21swapper/219:45:162
240272640,4sleep10-21swapper/121:25:251
104232620,3sleep10-21swapper/123:50:061
66452600,2sleep30-21swapper/320:25:133
946499533,4cyclictest25-21ksoftirqd/121:10:141
9464995044,3cyclictest25-21ksoftirqd/122:50:141
9464995044,3cyclictest25-21ksoftirqd/121:00:181
9463995017,4cyclictest9-21ksoftirqd/000:20:370
9463995017,4cyclictest9-21ksoftirqd/000:20:370
38112500,1sleep30-21swapper/323:00:223
38112500,1sleep30-21swapper/323:00:223
9464994942,4cyclictest25-21ksoftirqd/120:55:201
9464994942,4cyclictest25-21ksoftirqd/119:45:191
9464994841,4cyclictest25-21ksoftirqd/120:00:211
946599472,43cyclictest0-21swapper/221:40:362
9464994740,4cyclictest25-21ksoftirqd/123:45:141
9466994620,22cyclictest3185-21tr23:40:163
9464994639,4cyclictest25-21ksoftirqd/100:20:141
9464994639,4cyclictest25-21ksoftirqd/100:20:141
9464994634,4cyclictest25-21ksoftirqd/120:30:211
946699451,42cyclictest0-21swapper/322:40:463
9464994438,3cyclictest25-21ksoftirqd/122:10:151
9464994437,4cyclictest25-21ksoftirqd/121:05:211
9464994437,4cyclictest25-21ksoftirqd/120:20:381
946599431,3cyclictest0-21swapper/223:10:162
946599430,3cyclictest0-21swapper/222:40:162
9464994338,3cyclictest25-21ksoftirqd/120:40:171
9464994330,4cyclictest25-21ksoftirqd/121:50:011
9464994330,4cyclictest25-21ksoftirqd/121:50:011
9464994329,10cyclictest25-21ksoftirqd/119:10:101
9464994329,10cyclictest25-21ksoftirqd/119:10:101
946599420,3cyclictest0-21swapper/219:25:362
9464994237,3cyclictest25-21ksoftirqd/100:15:151
9464994230,10cyclictest25-21ksoftirqd/123:10:351
946499421,4cyclictest121rcu_preempt21:50:171
9464994130,3cyclictest25-21ksoftirqd/123:40:351
946499411,4cyclictest25-21ksoftirqd/123:30:501
9463994136,3cyclictest9-21ksoftirqd/022:15:160
9463994126,4cyclictest9-21ksoftirqd/021:40:210
946699404,8cyclictest23556-21apt-get20:45:213
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

Valid XHTML 1.0 Transitional