[Android PGO] How can I generate PGO file for Android locally?

[Atlas Zhang]

I have read this Docs:

https://chromium.googlesource.com/chromium/src.git/+/master/docs/pgo.md

and I have generate PGO file in Linux following above document.



Now I want to generate PGO for Android locally(in some reasons I don`t want to use downloaded PGO), but I can not find any docs introduce how to do it.

[Nico Weber]

Hi,

as far as I know, we currently use Linux-generated PGO profiles for Android builds…whoa no, we actually switched to real profiles recently: https://bugs.chromium.org/p/chromium/issues/detail?id=1464107

Very cool! huangs, do we have docs on how to generate these somewhere?

Nico

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[Andrew Grieve]

+Peter Wen has also been working on PGO. I think the steps to generate the profile are mostly the same, but still probably worth updating the instructions in that doc?

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[Peter Wen]

Great question Atlas! I am currently trying to figure out how to reliably generate PGO profiles for Android locally. Currently I can generate *.profraw files but I cannot successfully generate *.profdata files from those *.profraw files. This is possible since the CI bots do it, but it just needs to be figured out for local development. If you figure out a way to do so in the meantime, please let me know! :)

Thanks,

Peter

[Peter Wen]

I've created https://crbug.com/1498612 to track my progress, so feel free to track that bug if you'd like.

Thanks,

Peter