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2023-01-29 - 02:34

x86 Intel Core i5-750 @2667 MHz, Linux 4.9.47-rt37 (Profile)

Latency plot of system in rack #8, 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
Characteristics of the 20 highest latencies:
System rack8slot3.osadl.org (updated Sat Jan 28, 2023 12:45:03)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
101532202110,87sleep30-21swapper/307:05:123
116092179162,13sleep20-21swapper/207:06:232
117752178159,15sleep10-21swapper/107:08:201
11570215588,63sleep00-21swapper/007:05:530
1660121110,2sleep10-21swapper/107:20:201
121232780,1sleep00-21swapper/012:39:090
1217799363,32cyclictest0-21swapper/109:17:111
12178993523,11cyclictest0-21swapper/212:34:292
12178993418,15cyclictest0-21swapper/210:28:142
1217999334,28cyclictest0-21swapper/309:28:163
12178993317,15cyclictest0-21swapper/209:55:282
1217999323,28cyclictest0-21swapper/312:28:513
1217999323,28cyclictest0-21swapper/311:38:413
1217999323,28cyclictest0-21swapper/311:23:393
1217999323,28cyclictest0-21swapper/311:03:343
1217999323,28cyclictest0-21swapper/310:43:303
1217999323,28cyclictest0-21swapper/309:38:183
1217999323,28cyclictest0-21swapper/308:38:083
1217999323,28cyclictest0-21swapper/307:30:263
320572310,4sleep10-21swapper/110:50:091
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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