You are here: Home / Projects / QA Farm Realtime / Latency plots / 
2019-11-15 - 10:57

Intel(R) Xeon(R) CPU E31220L @ 2.20GHz, Linux 3.18.43-rt46-fulldebug (Profile)

Latency plot of system in rack #b, slot #0
Note that this system runs a non-optimized debug kernel.
Data to construct the above plot have been generated using the RT test utility cyclictest.
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: ondemand
The worst-case latency is about 1.76 times higher under graphics load.
Results of all systems with accelerated graphics are combined on this summary graph.
Characteristics of the 20 highest latencies:
System rackbslot0.osadl.org (updated Fri Nov 15, 2019 00:43:27)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2679026449,10sleep00-21swapper/017:17:400
2667826045,10sleep20-21swapper/217:16:172
2667426044,11sleep30-21swapper/317:16:143
2675525842,11sleep10-21swapper/117:17:131
178882560,10sleep22711999cyclictest19:25:542
27119995427,6cyclictest1502-21nfsd19:20:002
126912540,1sleep312692-21modprobe20:39:393
27119995135,6cyclictest11901-21modprobe19:48:542
242799500,3rtkit-daemon2426-21rtkit-daemon17:29:343
2709699490,45cyclictest3-21ksoftirqd/019:43:260
245562470,2sleep324545-21bash19:52:203
27119994634,6cyclictest13786-21modprobe20:36:492
27119994532,9cyclictest7192-21bash22:30:162
27119994532,8cyclictest27625-21sshd21:07:272
27119994532,6cyclictest24320-21modprobe21:15:272
27119994530,6cyclictest21096-21sshd19:57:572
242799450,12rtkit-daemon0-21swapper/120:55:321
27128994332,8cyclictest5811-21kworker/u8:021:04:253
27119994329,10cyclictest8861-21bash20:14:482
2711999424,32cyclictest18615-21modprobe20:24:022
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

Valid XHTML 1.0 Transitional