You are here: Home / Projects / QA Farm Realtime / Latency plots / 
2021-10-26 - 23:27

Intel(R) Core(TM) i5-8365UE CPU @ 1.60GHz, Linux 5.10.41-rt42 (Profile)

Latency plot of system in rack #a, slot #8
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
Compare latency of primary with shadow system
Characteristics of the 20 highest latencies:
System rackaslot8.osadl.org (updated Tue Oct 26, 2021 12:44:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
278272319287,21sleep10-21swapper/107:08:461
276322284255,19sleep20-21swapper/207:06:262
259462279250,19sleep00-21swapper/007:05:020
278462269239,20sleep30-21swapper/307:09:003
322162640,1sleep332208-21sh12:35:173
152832630,0sleep30-21swapper/310:45:543
303342620,0sleep20-21swapper/211:55:092
39472570,0sleep30-21swapper/312:18:123
175762570,0sleep30-21swapper/311:27:103
127742550,0sleep00-21swapper/012:23:420
43782200,0sleep00-21swapper/011:58:580
36862190,0sleep20-21swapper/212:37:332
256102180,0sleep00-21swapper/010:13:120
85822140,0sleep20-21swapper/210:42:052
261722140,0sleep10-21swapper/110:53:081
228142140,0sleep20-21swapper/209:32:092
178122140,0sleep00-21swapper/009:29:390
50122130,0sleep35009-21ssh10:00:583
36132130,0sleep00-21swapper/008:35:200
185432130,0sleep20-21swapper/211:47:402
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

Valid XHTML 1.0 Transitional