Add design doc for Go labels #465
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Co-authored-by: Felix Geisendörfer <[email protected]>
| - When disabled custom labels has little to no impact on performance or memory usage of the profiler | ||
| - Custom labels should be limited so that even if a program has thousands of eligible labels the number supported is reasonably small (mostly enforced by eBPF itself) | ||
| - Custom labels should be short and have fixed memory overhead | ||
| - The custom labels should be made available to the reporter backend but otherwise it should be left up to implementors what to do with them |
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To fit into OTel it would be great to make the costum labels available with the OTel SemConv. Package reporter should just be an implementation detail.
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How does one make something available with the OTel SemConv package?
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Taking environment variable as example, information like labels can be provided as attribute:
opentelemetry-ebpf-profiler/reporter/internal/pdata/generate.go
Lines 230 to 233 in afbda36
From a quick lock, currently there is no specific OTel SemConv for labels afaict. But we should use a label that is commonly agreed until there is a OTel SemConv variant. Where this label key/value pair is used, e.g. in package reporter, then just becomes an implementation detail.
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So should I add something like this to the custom labels PR:
https://gist.github.com/gnurizen/1b2c6bd8904a603d8ed621d57e28c83a
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Should we also merge this now since the PR got merged? @gnurizen if there's follow up work that includes changes to this design document we can open a new PR.
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