[llvm-dev] RFC: XRay FDR/Profiling Mode Moving to Post-Commit Review

[Dean Michael Berris via llvm-dev]

Hi llvm-dev,

I've recently been working on improving the profiling mode for XRay in
compiler-rt [0] and am ramping up efforts to do the same for
flight-data recorder mode. The changes are generally in the direction
of reducing the overheads (measured through benchmarks in the
test-suite) and addressing some feature requests/bugs.

In the interest of addressing these changes in a timely manner, I'm
going to start doing post-commit reviews for the profiling mode
patches in compiler-rt. Keith Wyss has been the primary reviewer for
XRay patches and has agreed to do the reviews post-commit as well.

Note that profiling mode for XRay is currently an optional component
of XRay and is still under active development.

If you have any questions and/or concerns about this, please feel free
to contact me either directly or through the mailing list.

Also note that there's no official code owner for XRay yet (hence the
message to the community).

With that said, help in code reviews for XRay would be most appreciated.

At the time of this writing, there are a number of patches addressing
performance and/or feature requests which are low-risk and are part of
ongoing active development:

- https://reviews.llvm.org/D49217
- https://reviews.llvm.org/D49359
- https://reviews.llvm.org/D49363

My intent is to land these in the next few hours and iterate on
post-commit review comments.

Cheers

[0] http://lists.llvm.org/pipermail/llvm-dev/2018-February/121237.html

-- 
Dean