You are here: Home / Projects / OSADL QA Farm Real-time / Latency plots / 
2023-01-29 - 06:26

x86 Intel Core i7-3770K @3500 MHz, Linux 5.15.49-rt47 (Profile)

Latency plot of system in rack #0, 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 -n -a4-7 -p99 -i200 -h400 -t4 -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 20 highest latencies:
System rack0slot2.osadl.org (updated Sun Jan 29, 2023 00:43:36)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
330432399140,1cyclictest3554334-21ntpq20:54:027
330431899140,14cyclictest0-21swapper/420:14:034
330432399133,9cyclictest3328527-21/usr/sbin/munin19:08:377
330431899130,13cyclictest0-21swapper/422:30:074
330432399120,11cyclictest3381536-21cat19:33:597
3304320991212,0cyclictest0-21swapper/622:08:286
3304319991212,0cyclictest0-21swapper/522:08:305
3304319991211,1cyclictest0-21swapper/500:17:375
330432399110,3cyclictest954011-21systemd-resolve20:50:377
330432399110,3cyclictest38314-10wireplumber22:04:017
330432399110,10cyclictest3464104-21cat20:13:547
330432399110,10cyclictest1696195-21snmpd22:31:357
330432099110,0cyclictest0-21swapper/619:24:496
3304319991111,0cyclictest0-21swapper/520:56:275
3304319991111,0cyclictest0-21swapper/518:59:005
3304319991111,0cyclictest0-21swapper/518:59:005
3304319991110,1cyclictest0-21swapper/519:37:095
330432399104,3cyclictest94014-21systemd-journal19:00:037
330432399104,3cyclictest94014-21systemd-journal19:00:037
330432399100,9cyclictest1696195-21snmpd00:14:027
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

Valid XHTML 1.0 Transitional