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2019-07-24 - 00:12

Intel(R) Core(TM) i7-3770K CPU @ 3.50GHz, Linux 4.19.37-rt19 (Profile)

Latency plot of system in rack #0, slot #2
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 --smi
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 rack0slot2.osadl.org (updated Tue Jul 23, 2019 00:43:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
200792650,0sleep10-21swapper/121:34:351
200792650,0sleep10-21swapper/121:34:351
158472640,0sleep40-21swapper/419:19:364
155272630,0sleep20-21swapper/219:19:342
157772620,0sleep60-21swapper/622:29:346
849726048,8sleep60-21swapper/619:05:456
854125850,5sleep30-21swapper/319:06:223
868825443,7sleep50-21swapper/519:08:245
859524736,7sleep20-21swapper/219:07:092
847724322,17sleep40-21swapper/419:05:274
851023625,7sleep10-21swapper/119:05:561
864323422,8sleep70-21swapper/719:07:467
843422816,8sleep00-21swapper/019:04:510
920999204,15cyclictest0-21swapper/623:33:306
79692190,0sleep60-21swapper/623:14:426
108422180,1sleep6641ktimersoftd/620:14:316
9194991715,1cyclictest797-21snmpd22:51:474
918299174,1cyclictest0-21swapper/220:47:022
283832170,0sleep20-21swapper/223:54:422
9213991513,1cyclictest0-21swapper/721:29:347
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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