You are here: Home / Projects / OSADL QA Farm Real-time / Latency plots / 
2023-06-07 - 10:55

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

Latency plot of system in rack #d, slot #1
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 rackdslot1.osadl.org (updated Wed Jun 07, 2023 00:46:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1176911770,6ptp4l0-21swapper/319:07:383
2192121720,7sleep23051099cyclictest00:35:422
1176911640,9ptp4l0-21swapper/219:07:032
1176911450,6ptp4l0-21swapper/119:05:031
3173121390,9sleep33051199cyclictest20:20:293
1301121300,7sleep03050899cyclictest22:00:210
1176911080,8ptp4l0-21swapper/019:05:100
117691740,8ptp4l1159-21snmpd22:00:293
117691740,7ptp4l321ktimersoftd/221:39:592
117691720,4ptp4l1185-21lldpd00:20:330
117691710,2ptp4l0-21swapper/319:22:333
241082700,4sleep130507-21cyclictest22:25:001
117691700,7ptp4l9-21ksoftirqd/020:50:450
117691700,4ptp4l1159-21snmpd21:10:403
117691700,2ptp4l0-21swapper/000:25:140
117691700,27ptp4l216-21systemd-journal22:38:543
162192690,4sleep01159-21snmpd23:15:350
117691690,5ptp4l11209-21ntp_states20:45:293
117691690,2ptp4l0-21swapper/322:46:133
117691690,15ptp4l33-21ksoftirqd/222:03:212
117691680,4ptp4l4815-21rs:main3
117691680,2ptp4l0-21swapper/319:38:503
117691670,5ptp4l1159-21snmpd19:35:270
117691670,3ptp4l9-21ksoftirqd/023:23:250
117691670,28ptp4l1159-21snmpd21:02:263
117691670,28ptp4l1159-21snmpd21:02:263
117691660,6ptp4l9-21ksoftirqd/021:41:450
117691660,4ptp4l1185-21lldpd23:35:300
117691660,2ptp4l0-21swapper/319:42:353
117691660,2ptp4l0-21swapper/222:13:532
117691660,1ptp4l0-21swapper/323:37:433
117691660,19ptp4l0-21swapper/320:17:243
117691650,2ptp4l0-21swapper/321:17:063
117691650,22ptp4l4813-21in:imuxsock22:57:053
117691650,22ptp4l4813-21in:imuxsock22:57:053
117691650,17ptp4l0-21swapper/323:03:223
141922640,3sleep11185-21lldpd22:00:381
117691640,2ptp4l0-21swapper/322:32:413
117691640,2ptp4l0-21swapper/322:19:573
117691640,2ptp4l0-21swapper/222:33:182
117691640,21ptp4l216-21systemd-journal23:46:563
117691640,1ptp4l0-21swapper/320:03:423
117691640,1ptp4l0-21swapper/300:26:093
117691640,19ptp4l0-21swapper/323:56:033
117691630,7ptp4l33-21ksoftirqd/220:22:142
117691630,2ptp4l0-21swapper/323:42:513
117691630,2ptp4l0-21swapper/222:07:012
117691630,2ptp4l0-21swapper/022:29:030
117691620,6ptp4l4815-21rs:main3
117691620,2ptp4l0-21swapper/323:13:413
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

Valid XHTML 1.0 Transitional