You are here: Home / Projects / OSADL QA Farm Real-time / Latency plots / 
2022-05-28 - 15:52

x86 Intel Atom E3845 @1915 MHz, Linux 4.19.37-rt20 (Profile)

Latency plot of system in rack #b, slot #6
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: performance
Compare latency of primary with shadow system
Characteristics of the 20 highest latencies:
System rackbslot6.osadl.org (updated Sat May 28, 2022 12:43:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2519121470,2sleep00-21swapper/009:25:260
911911030,4ptp4l401ktimersoftd/309:17:163
178612900,3sleep30-21swapper/312:01:283
183792860,2sleep20-21swapper/213:40:532
189672787,54sleep00-21swapper/009:15:160
91191630,2ptp4l401ktimersoftd/313:56:363
3022620,2sleep30-21swapper/313:13:313
133282620,1sleep10-21swapper/110:10:161
91191610,1ptp4l401ktimersoftd/313:02:343
91191580,1ptp4l401ktimersoftd/312:46:363
91191580,1ptp4l401ktimersoftd/312:15:153
192872560,2sleep20-21swapper/209:15:172
91191550,1ptp4l401ktimersoftd/314:41:303
91191550,1ptp4l401ktimersoftd/314:27:223
91191550,1ptp4l401ktimersoftd/311:37:423
67362540,2sleep00-21swapper/014:12:390
104922540,2sleep20-21swapper/213:29:042
20559995341,5cyclictest41-21ksoftirqd/309:20:093
2054999504,16cyclictest0-21swapper/110:04:591
2054999504,12cyclictest3802-21fschecks_time09:50:131
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

Valid XHTML 1.0 Transitional