You are here: Home / Projects / QA Farm Realtime / Latency plots / 
2021-07-26 - 17:52

Intel(R) Xeon(R) CPU E31220 @ 3.10GHz, Linux 4.19.8-rt6 (Profile)

Latency plot of system in rack #1, 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 rack1slot0.osadl.org (updated Mon Jul 26, 2021 12:43:55)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3040821120,0sleep030409-21grep09:59:260
82802640,1sleep28267-21sshd09:45:502
171262620,2sleep11893999cyclictest10:21:061
294342610,0sleep10-21swapper/109:32:351
277112610,0sleep30-21swapper/309:50:323
32232600,0sleep00-21swapper/012:11:070
277932600,0sleep20-21swapper/209:59:122
237362600,0sleep10-21swapper/107:20:151
1863626049,7sleep20-21swapper/207:07:512
149382600,0sleep00-21swapper/011:03:400
121442600,0sleep00-21swapper/010:40:370
319202590,0sleep00-21swapper/009:53:490
300722590,0sleep30-21swapper/310:36:323
300722590,0sleep30-21swapper/310:36:313
1858425835,7sleep00-21swapper/007:07:170
163292580,0sleep10-21swapper/112:00:501
126152580,0sleep012612-21sshd10:12:080
322532570,0sleep30-21swapper/310:22:283
1859625745,7sleep10-21swapper/107:07:261
303222560,0sleep30-21swapper/309:29:363
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

Valid XHTML 1.0 Transitional