You are here: Home / Projects / OSADL QA Farm Real-time / Latency plots / 
2022-07-04 - 22:59

x86 Intel Core i9-9900K @3600 MHz, Linux 5.15.2-rt19 (Profile)

Latency plot of system in rack #0, slot #3
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 rack0slot3.osadl.org (updated Mon Jul 04, 2022 12:45:56)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3715232397378,13sleep10-21swapper/107:08:441
3716172381361,14sleep70-21swapper/707:09:5413
3697662374369,3sleep50-21swapper/507:05:1911
3714692363357,4sleep30-21swapper/307:07:579
3714782361346,5sleep120-21swapper/1207:08:074
3714742357351,4sleep80-21swapper/807:08:0314
3681922348307,14sleep100-21swapper/1007:05:082
3714952345337,5sleep110-21swapper/1107:08:223
3715882344306,14sleep20-21swapper/207:09:328
3714812344337,5sleep150-21swapper/1507:08:107
3706152341332,6sleep140-21swapper/1407:05:286
3715952340320,14sleep60-21swapper/607:09:3712
3714022340321,13sleep130-21swapper/1307:07:045
3714872337330,5sleep40-21swapper/407:08:1510
3715022336327,6sleep00-21swapper/007:08:270
3713982336317,13sleep90-21swapper/907:06:5915
6418372730,0sleep20-21swapper/210:50:338
4696322670,0sleep70-21swapper/709:00:2413
6058612600,0sleep30-21swapper/310:29:309
3984612580,1sleep140-21swapper/1407:37:146
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

Valid XHTML 1.0 Transitional