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2022-06-30 - 21:01

x86 Intel N455 @1660 MHz, Linux 5.4.34-rt21 (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 100, Linux 4.9.20-rt16, x86_64 highest latencies:
System rack3slot6 (updated Thu Jun 30, 2022 12:45:15)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
26796991249,33cyclictest0-21swapper/110:40:121
2630729834,52sleep10-21swapper/107:06:021
220962970,8sleep12679699cyclictest11:40:241
2652929021,32sleep00-21swapper/007:08:280
26787998863,12cyclictest0-21swapper/012:25:240
26787998452,18cyclictest0-21swapper/011:35:120
26787998321,24cyclictest5790-21kworker/0:111:05:120
26787998051,18cyclictest9-21ksoftirqd/009:00:120
26787998022,46cyclictest0-21swapper/010:20:140
26787997813,49cyclictest0-21swapper/011:30:140
26787997721,39cyclictest0-21swapper/007:35:230
296022760,15sleep12679699cyclictest08:50:321
2679699766,47cyclictest0-21swapper/111:10:231
2678799768,56cyclictest0-21swapper/010:50:150
26787997649,15cyclictest0-21swapper/012:15:120
26787997646,17cyclictest0-21swapper/012:00:120
26787997517,43cyclictest0-21swapper/012:30:140
26787997447,14cyclictest0-21swapper/010:05:180
26787997345,15cyclictest0-21swapper/011:20:100
26787997333,29cyclictest0-21swapper/010:10:140
26787997315,44cyclictest0-21swapper/010:45:120
26787997315,44cyclictest0-21swapper/008:05:100
26787997314,45cyclictest0-21swapper/011:50:120
26787997243,16cyclictest0-21swapper/011:10:240
26787997213,47cyclictest0-21swapper/009:20:130
26787997142,17cyclictest0-21swapper/010:55:120
26787997141,18cyclictest0-21swapper/009:45:130
26787997140,18cyclictest0-21swapper/010:00:110
26787997119,39cyclictest0-21swapper/008:55:100
26787997116,44cyclictest0-21swapper/008:25:120
26787997115,40cyclictest0-21swapper/011:25:130
2678799706,50cyclictest0-21swapper/011:40:110
26787997016,40cyclictest0-21swapper/011:45:140
26787997014,44cyclictest0-21swapper/012:05:150
26787997014,43cyclictest0-21swapper/009:40:140
26787997013,43cyclictest0-21swapper/008:10:160
26787997012,44cyclictest0-21swapper/012:35:120
26787997011,46cyclictest0-21swapper/012:10:180
26787997011,46cyclictest0-21swapper/012:10:170
26787996944,15cyclictest9-21ksoftirqd/008:50:130
26787996940,16cyclictest0-21swapper/007:15:110
26787996915,40cyclictest0-21swapper/009:05:150
26787996837,17cyclictest0-21swapper/009:50:140
26787996831,24cyclictest9-21ksoftirqd/009:30:150
26787996826,30cyclictest9-21ksoftirqd/008:20:140
26787996824,31cyclictest9-21ksoftirqd/010:40:140
26787996814,41cyclictest0-21swapper/011:55:140
26787996813,44cyclictest0-21swapper/007:20:140
26787996813,42cyclictest0-21swapper/010:30:160
26787996812,43cyclictest0-21swapper/009:10:230
26787996810,43cyclictest518-21snmpd09:25:140
26787996739,16cyclictest0-21swapper/007:30:140
26787996736,19cyclictest0-21swapper/008:35:150
26787996731,24cyclictest9-21ksoftirqd/007:40:110
26787996713,43cyclictest0-21swapper/012:20:130
2678799669,41cyclictest28504-21chrt10:25:130
2678799665,48cyclictest0-21swapper/009:15:110
26787996638,17cyclictest0-21swapper/008:40:110
26787996626,27cyclictest9-21ksoftirqd/008:30:130
26787996537,16cyclictest0-21swapper/007:45:110
105202650,17sleep12679699cyclictest07:55:201
2679699642,56cyclictest6892-21kworker/1:010:14:271
26787996437,15cyclictest0-21swapper/011:00:100
26787996423,27cyclictest9-21ksoftirqd/007:55:120
26787996419,34cyclictest0-21swapper/008:45:230
302882630,7sleep10-21swapper/110:30:201
26787996310,39cyclictest32085-21apt-get10:35:150
2678799626,44cyclictest0-21swapper/007:25:110
26787996230,22cyclictest9-21ksoftirqd/010:15:150
26787996215,35cyclictest9-21ksoftirqd/009:55:140
26787996210,20cyclictest9744-21runrttasks07:50:430
26787996127,24cyclictest9-21ksoftirqd/011:15:120
26787996025,26cyclictest26777-21cyclictest08:15:130
26796995938,14cyclictest21-21ksoftirqd/111:05:001
26796995919,22cyclictest0-21swapper/107:35:241
26796995913,12cyclictest0-21swapper/109:34:011
26787995930,17cyclictest0-21swapper/008:00:110
296032580,16sleep12679699cyclictest10:25:501
26787995811,35cyclictest26777-21cyclictest07:10:110
2679699574,15cyclictest4436-21apt-get12:25:241
26796995741,10cyclictest21-21ksoftirqd/112:10:001
26796995740,10cyclictest21-21ksoftirqd/109:40:001
26796995737,13cyclictest21-21ksoftirqd/111:20:001
26796995736,14cyclictest6988-21ntpq10:55:311
26787995611,35cyclictest26777-21cyclictest09:35:130
26796995533,15cyclictest276-21systemd-journal07:12:531
26796995524,27cyclictest0-21swapper/107:30:311
26796995523,27cyclictest0-21swapper/111:58:321
26796995523,27cyclictest0-21swapper/109:23:111
41752545,39sleep10-21swapper/110:46:391
31762543,43sleep13180-21ntp_states12:20:291
26796995435,12cyclictest21-21ksoftirqd/109:20:011
26796995434,13cyclictest21-21ksoftirqd/111:40:011
26796995434,12cyclictest21-21ksoftirqd/109:00:001
26796995423,26cyclictest0-21swapper/112:38:021
26796995423,26cyclictest0-21swapper/110:03:011
26796995420,18cyclictest0-21swapper/109:45:111
311322532,43sleep131203-21cat07:20:241
2679699537,35cyclictest32085-21apt-get10:35:261
26796995334,11cyclictest14937-21turbostat09:45:011
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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