You are here: Home / Projects / OSADL QA Farm Real-time / Latency plots / 
2022-05-26 - 19:59

x86 Intel Xeon-E31220L @2200 MHz, Linux 4.9.47-rt37 (Profile)

Latency plot of system in rack #5, slot #0
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
Characteristics of the 20 highest latencies:
System rack5slot0.osadl.org (updated Fri May 20, 2022 00:44:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3170721600,0sleep231705-21sshd23:05:192
345721460,3sleep32914799cyclictest22:26:313
1438821400,1sleep214366-21sshd00:06:032
3078821390,0sleep130759-21sshd23:36:121
247321150,0sleep12471-21bash00:13:551
3201521050,1sleep10-21swapper/121:25:061
1749421050,2sleep117478-21sshd23:04:091
2520321020,3sleep02914499cyclictest21:54:590
2881529833,45sleep30-21swapper/319:09:063
112012960,2sleep211184-21sshd23:31:442
89132900,2sleep10-21swapper/122:49:231
60372890,2sleep21875-21nfsd22:35:092
181812890,0sleep00-21swapper/023:15:230
51922880,2sleep35176-21sshd22:01:353
280412880,2sleep128037-21sshd21:19:131
200472880,3sleep22914699cyclictest22:33:312
287342850,3sleep30-21swapper/323:05:073
260082850,2sleep20-21swapper/222:56:292
102692850,1sleep30-21swapper/321:39:553
100262850,2sleep20-21swapper/223:54:082
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

Valid XHTML 1.0 Transitional