RFR: 8317453: NMT: Performance benchmarks are needed to measure speed and memory

[Gerard Ziemski]

On Tue, 22 Apr 2025 13:59:31 GMT, Stefan Karlsson <stefank at openjdk.org> wrote:

> When benchmarking malloc the multi-threaded performance is important. If you take a lock while malloc:ing you probably don't get any significant performance degradation a single-threaded run, but if you malloc from multiple threads you will likely see a significant performance / latency degradation. Has this been considered when thinking about the performance of NMT and this tool?

Clarification: when I say performance I mean as much memory usage as speed.

Yes, I was aware of that and this particular issued has not been addressed yet.

At this point I was interested in memory usage and any big changes that affect speed differences (i.e. NMT summary vs NMT detail modes).

This is just a beginning, more to come...

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PR Comment: https://git.openjdk.org/jdk/pull/23786#issuecomment-2821592888