core-latency | simple benchmark which measures latency | Performance Testing library
kandi X-RAY | core-latency Summary
kandi X-RAY | core-latency Summary
A simple tool for measuring latency between CPU cores. Execute make test command to run the benchmark. Requires Linux with a C++11 compiler (tested with gcc) and boost libraries. Note that measured latencies are for full roundtrip between two cores. Divide them by two to get actual time needed to fetch data from another core. Latencies are commutative so only one measument is displayed for each core pair.
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QUESTION
There is an interesting article about ARM8.1 Graviton 2 offering of AWS. This article has tests for CPU coherency where I am trying to repeat.
There is C++ code repo in GitHub named core-latency using Nonius Micro-benchmarking.
I managed to replicate the first test without atomic instructions using the command below to compile:
...ANSWER
Answered 2021-Apr-30 at 09:51After doing some more experiments, I found the problem. In the code snippet below are the steps:
- making a comparison first (if state equals Ping)
- calling the class method
set
to do an atomic store operation.
Code snippet from core-latency:
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